{"Bibliographic":{"Title":"Federal plans for cooperative backup among operational processing centers","Authors":"","Publication date":"1976","Publisher":""},"Administrative":{"Date created":"08-17-2023","Language":"English","Rights":"CC 0","Size":"0000048872"},"Pages":["F43\nIRIMENT UR CUMMEKGE National and Atimosprieric A\n1976\nDEPARTMENT\nOF\nCOMMUNICATION\nERAL COORDINATOR FOR\n*\nMETEOROLOGICAL SERVICES\nwith\nAND SUPPORTING RESEARCH\nSTATES\nOF\nFederal Plans for\nCooperative Backup\nAmong Operational\nProcessing Centers\nFCM 76-4\nWashington, D.C.\nDecember 1976","875\n46\nF43\n1976\nU.S. DEPARTMENT OF COMMERCE\nLus. J Federal Coordinator for Meteorological\nNational Oceanic and Atmospheric Administration\nServices and Supporting Research\noffice of\nFEDERAL PLANS FOR COOPERATIVE BACKUP\nAMONG OPERATIONAL PROCESSING CENTERS\nATMOSPHERIC SCIENCES\nLIBRARY\nFCM 76-4\nJUL 15 1977\nN.O.A.A.\nWashington, D. C.\nU.S. Dept. of Commerce\nDecember 1976\n77\n2069","FOREWORD\nThe Federal Plans for Cooperative Backup Among Operational Processing\nCenters included in this document describe and update long-standing\ncooperative arrangements involving the civil and military meteorological\nservices.\nThese plans specifically identify emergency backup procedures for high-\npriority user products prepared by the Department of Commerce's National\nMeteorological Center and National Severe Storms Forecast Center by the\nDepartment of Defense's Air Force Global Weather Central and Fleet\nNumerical Weather Central in the event of extended power or computer\noutages at the National Centers. The importance of the continuity of\nthese services should be self evident. The users who depend directly\non these products are not only the nationwide network of Weather\nForecast Offices and Weather Service Offices, but also over 200 offices\nof other Federal agencies and private meteorologists, whose collective\nservices satisfy the Nation's demands for weather services and warnings.\nThis document is one of a series of plans prepared by the Federal\nCoordinator for Meteorological Services and Supporting Research to\ndescribe present and planned services and is issued in response to\nthe Office of Management and Budget Circular A-62.\nEdward S. Epstein\nFederal Coordinator for Meteorological\nServices and Supporting Research\nii","TABLE OF CONTENTS\nPage\nForeword\nii\nIntroduction\n1\nI. Federal Plan for Backup of the National Meteorological\nCenter\n1-1\nDefinition of Extended Outage\n1-2\nEmergency Backup Processing Centers\n1-2\nFacsimile Circuit and Backup Schedules\n1-3\nTransmission Points\n1-3\nTransmission Procedures\n1-3\nNMC Responsibility\n1-3\nEstimate of Duration of Outage.\n1-3\nDecision to Implement Backup Plan\n1-3\nNotification of AFGWC and FNWC.\n1-4\nNotification of NSSFC\n1-4\nResumption of Normal Operations\n1-4\nAFGWC Responsibility\n1-4\nInitiation\n1-5\nAnnotation\n1-5\nTermination of Backup Responsibility\n1-5\nFNWC Responsibility\n1-5\nInitiation\n1-5\nAnnotation of First Transmission\n1-5\nTermination of Backup Responsibility\n1-5\nNSSFC Responsibility\n1-6\nLink AFGWC to NAFAX and NAMFAX\n1-6\nNSSFC Products\n1-6\nTermination of Backup Responsibility\n1-6\nSecondary Backup\n1-6\nTesting of the Backup system\n1-6\nAdditional Instructions\n1-7\nAppendix A\nA-1\nCommunications Facilities and Operational Communications\nProcedures for Backup\nA-1\nFacsimile.\nA-1\nNAFAX\nA-1\nNAMFAX\nA-2\nFOFAX\nA-2\niii","Appendix A (Cont'd)\nPage\nA-6\nEmergency Power\nA-6\nMiscellaneous\nA-6\nCommunications Procedures\nBackup for NMC Communications Computers\nA-8\nB-1\nAppendix B\nNAFAX/NAMFAX Backup Schedule.\nB-1\nC-1\nAppendix C\nPlan for Stage 1 Backup of NMC by FNWC, Monterey\nC-1\nD-1\nAppendix D\nFNWC Backup of FOFAX.\nD-1\nII. Backup Plan for Severe Local Storms Forecasts\n2-1\n2-1\nSELS Responsibility\n2-1\nAFGWC Responsibility\n2-3\nCommunications\n2-3\nMaterials,\n2-3\nTesting of the Backup System\n2-3\nAdditional Instructions\nIII. Backup Plan for Aviation Wind Forecasts.\n3-1\n3-1\nProcedures\n3-2\nDigital Aviation Wind Forecast Format and Content\n3-2\nTesting of the Backup System\niv","FEDERAL PLANS FOR COOPERATIVE BACKUP AMONG OPERATIONAL\nPROCESSING CENTERS\nINTRODUCTION\nThese Federal Plans describe cooperation among civil and military\nmeteorological services. The meteorological services over the years\nhave become increasingly dependent on centralized computer facilities\nand automated telecommunication facilities. These processing centers\ncollect and relay a high percentage of meteorological data and are the\nmajor source for both analysis and forecast products. Any prolonged\ndisruption in a processing center service will have a profound effect\non all users. The Federal Plans describe emergency backup procedures\nfor the National Meteorological Center (NMC) at Suitland Md., and the\nNational Severe Storms Forecast Center (NSSFC) at Kanasa City, Mo.\nThe NOAA National Weather Service's NMC prepares meteorological analyses\nand forecasts disseminated to a large number of users primarily by\nfacsimile and teletypewriter. In addition, large volumes of raw data\nare received and relayed to other processing centers. An extended power\noutage or computer failure could cause a serious disruption in NMC opera-\ntions. If failures occur, facsimile and other products emanating from\nNMC will not reach users, including National Weather Service and Depart-\nment of Defense (DOD) field facilities located throughout the country.\nBackup Plan I for Processing Centers employs the Air Force Global Weather\nCentral (AFGWC) and the Navy's Fleet Numerical Weather Central (FNWC) as\nbackup for NMC. Backup Plan II covers the Severe Local Storms (SELS) Unit\nof the NSSFC. When SELS backup is needed, support will be provided by\nthe AFGWC. Backup Plan III provides AFGWC backup for the NMC aviation\nflight level wind and temperature forecasts over the Northern Hemisphere.\nThe DOD depends entirely on NMC for observed (\"raw\") data from Canada,\nAlaska, parts of South America, and most ocean vessels other than those\nof the U.S. Navy. This raw data is handled by communications computers at\nNMC. Details of NMC's communications backup to the Air Force and Navy\nweather computers are given at the end of Appendix A.\nBackup support from the AFGWC or the FNWC will not interfere with DOD\nsupport and, in cases of conflict, DOD requirements will take precedence.\nThese plans are provided as separate sections within this document. The\nsections may be revised either jointly or separately on an as needed basis.\n1","I. FEDERAL PLAN FOR BACKUP OF THE NATIONAL METEOROLOGICAL CENTER\nThis plan has been designed to achieve some measure of backup to the\nNational Meteorological Center (NMC) and yet stay within resource con-\nstraints. The objective of the plan is to provide reasonable continuity\nof facsimile guidance products for field facilities in the event of computer\nor power outages affecting NMC. The main feature of the plan provides for\nuse of those products generated by the Air Force Global Weather Central\n(AFGWC) at Offutt Air Force Base, Nebr., and by the Navy Fleet Numerical\nWeather Central (FNWC), Monterey, Calif., that come closest to satisfying\nhigh-priority requirements of the National Weather Service (NWS) and the\nDOD. The AFGWC will transmit these charts over the National Facsimile\nSystem (NAFAX) and the National and Aviation Meteorological Facsimile\nSystem (NAMFAX) via Kansas City, Mo. The FNWC will transmit charts from\nMonterey to Suitland, Md., where they will be used by the NWS as described\nlater.\nThe most probable outage problem at NMC would be a partial one, Stage 1,\n(see below) wherein the large NOAA processing computers were down for an\nextended period, but the communications computers were still functioning.\nIn the event of Stage 1 outage at NMC, selected upper air analyses and\nforecasts from FNWC will be transmitted to NMC by FNWC as shown in the\nAppendix C to this plan.\nNMC would rely on numerical guidance from FNWC as internal backup for upper\nlevel analyses and prognoses because the Navy's prediction model is similar\nto NMC's model. With this guidance, NMC would still supply manually pre-\npared charts including the surface analyses (except northern hemisphere\nnow done by computer) to the facsimile circuits. Radar summaries and\nsevere weather outlooks would originate from the National Severe Storms\nForecast Center (NSSFC) at Kansas City. While communications computers\nat Suitland are operative, NMC may choose to relay some Navy charts on the\nfacsimile circuits.\nIn the event of a partial outage at NMC in which the large computers are\ndown, there would be no backup for high priority teletypewriter guidance\n(LFM 6-hrly detailed values at stations, or model output statistical\nforecast products such as probability of precipitation and maximum/minimum\ntemperatures) since the military centers do not produce this type of\nguidance.\nIn the event of a total (Stage 2) outage of all NMC operations, hand\nanalyses and forecasts would be unavailable from Forecast Division. High -\nlevel analyses and prognoses, as well as the surface analyses and manually\nprepared 12- and 24-hr. prognoses, including horizontal cloud and weather\ndepiction, will be entered on the NAFAX and NAMFAX circuits by AFGWC, as\nshown in Appendix B to this plan.\n1-1","Selected numerical upper air analyses and forecasts, as shown in Appendix D\nto this plan will also be transmitted to Washington by FNWC for entry on\nFOFAX. NSSFC will enter the radar summaries and severe weather outlooks\nas at present.\nThe Automation of Field Operations and Services (AFOS) Program being\nimplemented by NWS is being taken into account in planning future backup.\nA joint NWS/AWS effort is underway to develop an interface between AFOS\nand AFGWC. Arrangements are being made for installation of the interface\nequipment in 1978.\nAppendix B gives the NAFAX/NAMFAX Backup Schedules for providing high-\npriority charts to users of NMC products. Appendices C and D give the\nFNWC schedules for Stage 1 and Stage 2 backup.\nDEFINITION OF EXTENDED OUTAGE\nFor the purposes of this plan, an extended outage is defined as a power\noutage or computer failure affecting NMC operations that lasts, or is\nexpected to last, 12 hours or longer. Two stages of outage at NMC are\npossible. In Stage 1 only the large NOAA computers at Suitland, Md., ,\nwould be down. In Stage 2 NMC would be completely off the transmission\ncircuits.\nEMERGENCY BACKUP PROCESSING CENTERS\nShould a Stage 1 extended outage occur, FNWC only would supply automated\nguidance to NMC and some automated guidance might be relayed to FOFAX,\nNAFAX, and NAMFAX. NMC would continue to put manually-prepared charts\nonto the circuits.\nAFGWC would provide Aviation Digital Forecasts as specificed in Plan III.\nChart lists are shown in Appendices, B, C, and D.\nIf an extended Stage 2 outage should occur,\n(a) FNWC will provide computer product support to FOFAX, and\n(b) AFGWC will drive NAFAX and NAMFAX with both manual and computer\nproducts.\nTransmission schedules of high-priority facsimile products as shown in the\nAppendices will continue for the duration of the outage. NSSFC will con-\ntinue to provide Radar Summaries and the graphical Severe Weather Outlook.\n1-2","FACSIMILE CIRCUIT AND BACKUP SCHEDULES\nThe NAFAX circuit WFX-1234/GD-60144 and the NAMFAX circuit GF-10201 will\nserve for the transmission of backup charts from AFGWC and NSSFC during the\nperiod of a Stage 2 outage. FOFAX circuits GF-10206, GF-10207, and\nGF-10208 will serve for transmission of backup charts from FNWC during the\nperiod of the outage. Emergency schedules of facsimile charts to be pre-\npared and transmitted on these circuits are contained in the Appendices.\nThey will be printed and distributed to all NAFAX, NAMFAX, and FOFAX users.\nFurther information on communications procedures is contained in Appendix A.\nTransmission Points\nThe AFGWC and the FNWC will serve as the transmission points for backup\nfacsimile charts during an extended outage.\nTransmission Procedures\nThe NSSFC provides the control for the AFGWC entry of facsimile products\ninto both the NAFAX and NAMFAX systems. Under Stage 2 outage, the NSSFC,\nKansas City, Mo., can interconnect GF-10602, (a link between NSSFC and AFGWC)\nand GF-10202 (a link between NSSFC and Washington, D.C.) to provide a\nthrough circuit from Offutt AFB to Washington, D.C. Connections can be\nmade in Washington at commercial switching points to NAFAX and NAMFAX\ncircuits as described in Appendix A.\nThe NWS Communications Unit at Suitland, Md., provides the control for the\nFNWC entry of facsimile products into the FOFAX system. Under Stage 2\noutage the Fleet Weather Facility (FWF), Suitland, Md., can connect with a\nvoice/data circuit from FNWC to provide a circuit to the NWS communications\nstation for relay to the FOFAX system. (See page A-2 )\nNMC RESPONSIBILITY\nIn the event of an outage affecting NMC operations, the Director, NMC, or\nhis designee shall be responsible for the following actions:\nEstimate of Duration of Outage\nEstimates of the duration of a Stage 1 outage will be obtained from the\nFacility Operations Division (FOD), Office of Management and Computer\nSystems, NOAA.\nEstimates of the duration of a Stage 2 outage will be provided by the\nDirector, NMC, or his designee.\nDecision to Implement Backup Plan\nBased on information from FOD, the Director, NMC, or his designee, will\nmake the decision on implementation of either the Stage 1 or the Stage 2\n1-3","backup plan. Telephone is used to invoke the plan. If NMC is incommunicado,\nthe National Weather Service Headquarters at Silver Spring, Md., will\ninvoke the plan. As a guideline, the backup plan should be implemented if:\n(1) the outage is expected to last 12 hours or longer, or\n(2) the outage has already lasted 12 hours and resumption of\nnormal capability is not imminent.\nNotification of AFGWC and FNWC\nIf the decision is made to implement the backup Plan, telephone contacts*\nwill be made with the designated focal points at AFGWC and FNWC requesting\nthem to begin emergency transmission on the circuits and to assume their\nassigned role in the Plan (see AFGWC Responsibility and FNWC Responsibility\nbelow) The NMC will also provide AFGWC and FNWC with a forecast of the\nduration of the outage and subsequent updated information when available.\nIf a Stage 1 outage occurs, NMC will notify FNWC that backup is required\nin\nsupport of the Forecast Division at NMC as described in Appendix E. NMC\nwill notify AFGWC that backup is required for Aviation Digital Forecasts\nas specified in Plan III.\nIf a Stage 2 outage occurs, NMC or NWSH will notify AFGWC and FNWC that\nfull backup is required.\nNotification of NSSFC\nPrompt telephone contact will also be made to the designated focal point* at\nNSSFC requesting NSSFC to perform its backup functions as defined on page 1-6.\nSimilar information on forecasts and updates concerning the expected duration\nof the outage, as provided to AFGWC and FNWC by NMC, will be given to NSSFC.\nResumption of Normal Operations\nUpon reinstatement of normal capability at NMC, notifications will be given\nto AFGWC, FNWC, and NSSFC of this fact and also the time that NMC will\nresume normal operations.\nAFGWC RESPONSIBILITY\nUpon notification from the Director, NMC, or his designee, that the backup\nPlan is to be implemented and of the stage of backup needed, AFGWC will\nbegin transmitting the required charts on the NAFAX and/or the NAMFAX\nsystems according to the backup schedules no later than 4 hours after\nreceipt of the notification. Aviation Digital information will be trans-\nmitted as required by Plan III. AFGWC will coordinate communications\nprocedures with their local Air Force Communications System (AFCS) unit.\n*The telephone numbers of all key individuals and installation involved\nhave been distributed separately. The telephone numbers and names of key\nindividuals will be updated as required.\n1-4","Initiation\nThe initial AFGWC transmission will be made according to the backup\nschedules contained in the Appendix and will correspond to the approximate\ntime of notification plus 4 hours if possible.\nAnnotation\nThe AFGWC will annotate or precede its first transmission with a suitable\nmessage indicating that emergency backup procedures are in effect and that\ntransmission on the NAFAX and/or NAMFAX schedule are originating from AFGWC.\nAn indication should also be given, if possible, of the time normal\noperations will resume.\nTermination of Backup Responsibility\nThe AFGWC will continue transmissions for NAFAX and NAMFAX and digital data\naccording to the backup schedules until such time as notification is\nreceived from NMC that it is ready to resume normal operations at a\nspecifically agreed upon time.\nFNWC RESPONSIBILITY\nUpon notification from the Director, NMC, or his designee that the backup\nPlan is to be implemented, FNWC will begin transmitting charts for the\nFOFAX system no later than 4 hours after receipt of the notification.\nInitiation\nThe initial FNWC transmission will be made according to the backup schedule\ncontained in the Appendices D and E, and will correspond to the approximate\ntime of notification plus 4 hours if possible.\nAnnotation of First Transmission\nThe FNWC will annotate or precede its first transmission with a suitable\nmessage indicating that emergency backup procedures are in effect and that\ntransmissions on the FOFAX schedule are originating from FNWC. An indication\nshould also be given, if possible, of the time normal operations will resume.\nTermination of Backup Responsibility\nThe FNWC will continue transmissions to NMC or for FOFAX according to the\nbackup schedules until such time as notification is received from NMC that\nit is ready to resume normal operations at a specifically agreed upon time.\n1-5","NSSFC RESPONSIBILITY\nUpon notification by NMC that the Stage 2 backup plan is being implemented,\nthe NSSFC will do the following:\nLink AFGWC to NAFAX and NAMFAX\nThe NSSFC will operate the necessary switches to permit AFGWC to enter\nNAFAX and NAMFAX with its initial backup transmissions.\nNSSFC Products\nThe NSSFC will transmit Radar Summaries and the Severe Weather Outlook\n(graphic) over NAFAX and NAMFAX according to the backup schedule.\nTermination of Backup Responsibility\nThe NSSFC will continue transmissions on NAFAX and NAMFAX according to the\nbackup schedule until such time as notification is received that NMC is\nready to resume normal operations. The NSSFC will then terminate AFGWC's\ncommunication links at the appropriate time and will revert to the normal\nNAFAX and NAMFAX schedules for its own transmission responsibilities.\nSecondary Backup\nBecause of its unique capability to transmit over NAFAX and NAMFAX, NSSFC\nis in a favorable position to provide some secondary backup to the system.\nWhile recognizing this capability, the Plan does not call for its employment\nat this time. As experience is gained, however, revised versions of the\nPlan may take advantage of some of this capability.\nTESTING OF THE BACKUP SYSTEM\nTesting of the backup system once every 6 months is recommended. The\nduration of these tests will be agreed upon by the parties involved.\nAdvance notification will be given to facsimile subscribers whenever such\ntests take place.\nWeekly tests of the transmission facilities between Offutt AFB and WBC\nSuitland will be conducted by the Air Force Communications Services (AFCS)\nUnit at AFGWC. These tests will alternate between NAFAX and NAMFAX. The\nsupervisor of the NWS communication unit at Suitland will be the manager for\nthese tests and will arrange detail with the Offutt AFCS unit.\nCircuit tests will be conducted by the FNWC on the first and third\nWednesdays of each month. The supervisor of the NWS communication unit\nat Suitland will be the manager for these tests and will arrange details\nwith the FNWC communication unit.\n1-6","Emergency power at all switches, nodal points, terminals, and processing\ncenters should be tested to determine the operational readiness of the\npower backup system for adverse real-time situations. National Communica-\ntion System Instructions (NCSI) 195-1 provides for the concept of an\neffective emergency power test and evaluation procedure program and adherence\nto this instruction is recommended at all participating facilities.\nADDITIONAL INSTRUCTIONS\nSpecial instructions for National Weather Service offices will be contained\nin a future issuance of a National Weather Service Operations Manual chapter\nentitled, \"Cooperative Backup Among Operational Processing Centers. \"\nAlso, a description of the AFGWC and FNWC charts to be transmitted in an\nemergency situation will be prepared and distributed as a numbered revision\nto the National Weather Service Forecasting Handbook No. 1 - Facsimile\nProducts.\nAppendix A of this document contains a description of the communications\nfacilities and operational communications procedures for backup. Appendix\nB\ngives the NAFAX and NAMFAX Backup Schedules. Appendix C describes the FNWC\nbackup for the NMC Forecast Division. Appendix D gives the FOFAX Backup\nSchedule.\n1-7","II. BACKUP PLAN FOR SEVERE LOCAL STORMS FORECASTS\nThe National Severe Storms Forecast Center (NSSFC), Kansas City, Mo.,\nthrough its Severe Local Storms (SELS) Unit, has the responsibility for\nissuing and cancelling severe local storm watches and preparing other\nappropriate material which is essential to the National Weather Service\nSevere Local Storms Warning Service. In the event that NSSFC should be\nunable to discharge its functions, there must be another unit capable of\nstepping in, at short notice, and operating the severe local storms fore-\ncasting program until NSSFC can resume operations.\nThe Air Force Global Weather Central (AFGWC) is in a unique position to\nprovide backup for SELS. Presently, AFGWC provides area and point warnings\nof tornadoes and severe thunderstorms for military operations within the\nconterminous United States, and in the process, frequently coordinates\nwith SELS during severe weather situations. Also, AFGWC can distribute\nthe NSSFC products on the Radar Reporting and Warning Coordination tele-\ntypewriter circuit (RAWARC) and the Service A teletypewriter circuit via\nCarswell AFB, Tex.; Suitland, Md.; and the Kansas City Switch (FAA's Weather\nMessage Switching Center).\nThe NWS Automation of Field Operations and Services (AFOS) Program being\nimplemented is being taken into account in planning future backup. A joint\nNWS/AWS effort is underway to develop an interface between AFOS and AFGWC.\nArrangements are being made for installation of the interface equipment\nin 1978.\nSELS RESPONSIBILITY\nIn the event of a power outage or other major disruption of operations, the\nSELS forecaster will make telephone contact* with the designated AFGWC\nfocal point and request backup (unless normal operations are expected to\nbe resumed in a short time interval during which the likelihood of severe\nweather is slight). The SELS forecaster will provide AFGWC with an estimate\nof the duration of the outage, the number of the last valid watch, and\nsubsequent updated information (when available).\nAFGWC RESPONSIBILITY\nUpon notification from SELS that the Backup Plan is to be implemented,\nAFGWC will prepare and transmit watches, outlooks, and other advices re-\ngarding severe local storm activity as prescribed in National Weather\nService Operations Manual (NWSOM) Chapter C-40. In addition, AFGWC will,\nas soon as practical, prepare and transmit the NSSFC graphic National\n*The telephone numbers of all key individuals and installations involved\nhave been distributed separately.\n2-1","Facsimile Network (NAFAX) and National and Aviation Meteorological Facsimile\nNetwork (NAMFAX) products (radar summary charts and severe weather outlook\ngraphic). Specifically, AFGWC will:\nInitiate a suitably worded message for RAWARC and Service A\nindicating that emergency backup procedures are in effect and\nthat subsequent severe weather watches, etc., will be issued\nby AFGWC as required.\nIssue, for the duration of the backup, the following SELS products\nfor transmission on RAWARC and Service A as required and described\nby NWSOM Chapter C-40:\n1. Severe Weather Outlook Narrative (C-40, Sec. 5.1) transmitted\ndaily at 0900Z and 1500Z and between February 1 and August 31\nat 2100Z\n2. Advance Information on Forthcoming Watch Areas (C-40, Sec. 5.3.3)\n3. Aviation and Combined Severe Weather Watches (C-40, Sec. 5.3)\n4. Severe Weather Watch Cancellations (C-40, Sec. 5.4)\n5. Status Reports (C-40, Sec. 5.5)\n6. All Clear Information (C-40, Sec. 5.6)\nIn addition, AFGWC will:\nPrepare and transmit on NAFAX the Severe Weather Outlook Graphic\nat 1105Z as specified in Section 5.2 of NWSOM Chapter C-40. This\nGraphic will also be transmitted on NAMFAX at 1116Z. In addition,\nradar summary charts will be prepared and transmitted as required\nby the NAFAX and NAMFAX Schedules. Descriptions of these two\nproducts may be found in Forecasting Handbook No. 1 (1976)\npages 7-39 and 5-17, respectively. These charts should be suitably\nannotated to indicate that they are backup charts.\nCoordinate with the affected WSFOs by telephone, prior to watch\nissuance or cancellation, if time permits. Likewise, WSFOs should\ncontact AFGWC directly, if necessary.\nThe AFGWC should coordinate with the National Hurricane Center, Coral\nGables, Fla., when tropical cyclones are affecting the conterminous\nUnited States.\nPart A of all AFGWC backup watches will begin as follows: \"A. THE USAF\nAIR WEATHER SERVICE, ACTING IN A BACKUP CAPACITY FOR THE NATIONAL SEVERE\nETC. \"\nSTORMS FORECAST CENTER, HAS ISSUED A.\n2-2","COMMUNICATIONS\nIn case of an inoperative NSSFC communications unit, AFGWC will transmit:\nAppropriate charts on NAFAX and NAMFAX\nTeletypewriter bulletins to the Carswell Automated Weather\nSwitch for further dissemination (by AFCS and FAA) on RAWARC\nand Service A circuits. AFGWC has a drop on the FTS which\npermits reliable coordination to be carried out.\nMATERIALS\nNSSFC will provide AFGWC with a copy of NWSOM Chapter C-40 (and other\npertinent directives) and an ample supply of necessary blank forms, charts,\netc.\nTESTING OF THE BACKUP SYSTEM\nPeriodic testing of the product backup system is recommended. The frequency\nand duration of these tests will be agreed upon by the parties involved.\nAdvance notification will be given to circuit subscribers whenever such\ntests take place.\nADDITIONAL INSTRUCTIONS\nFuture issuances of NWSOM Chapter C-40, the National Severe Local Storms\nOperations Plan, and this Backup Plan will all be in agreement with one\nanother.\n2-3","III. BACKUP PLAN FOR AVIATION WIND FORECASTS\nThe National Meteorological Center (NMC) Suitland, Md., has the responsi-\nbility for issuing a number of meteorological end products, such as wind\nand temperature forecasts for aviation. The areal coverage of NMC products\ncurrently includes the Northern Hemisphere and the tropical regions of the\nSouthern Hemisphere. The World Meteorological Organization has designated\nNMC as the analysis and forecast arm of the Washington World Meteorological\nCenter which includes global responsibilities as part of international\ncooperative efforts. In the event that NMC should be incapacitated or\notherwise unable to discharge its functions, another unit capable of con-\ntinuing the service at short notice must provide the aviation wind forecasts\nuntil such time as NMC is able to resume normal operations. This Plan is\nbased on the assumption that NMC's communications computer will remain\noperational during the time when its main processing computers are down.\nThe Air Force Global Weather Central (AFGWC) currently provides digital\naviation wind and temperature forecast data for military operations that\nare similar to those produced by the NMC. With a slight modification of\nthe data, NMC can process the AFGWC aviation digital forecasts on the NMC\ncommunications computers for distribution. The AFGWC backup will initially\nbe limited to Northern Hemisphere data for selected pressure levels and\nforecast periods and will be initiated by NMC after experiencing or when\nexpecting significant outages at the NMC computational center. Significant\noutages would normally be those of 12 hours or more duration.\nThe Automation of Field Operations and Services (AFOS) Program being\nimplemented by NWS is being taken into account in planning future backup.\nA joint NWS/AWS effort is underway to develop an interface between AFOS\nand AFGWC. Arrangements are being made for installation of the interface\nequipment in 1978.\nPROCEDURES\n1. The Aviation Weather Senior Duty Meteorologist (SDM) at NMC will\nrequest AFGWC backup when, in his judgment, a significant computer outage\nis being experienced by NMC with a high risk that the outage will be con-\ntinued. The SDM will contact the AFGWC Duty Officer and will request\nthat the backup package be sent. Normally, the SDM will not request a\n12-hour forecast because a \"significant outage\" determination is not likely\nto occur until 12 hours or more after 0000Z and 1200Z. However, should a\ncomputer outage extend beyond one data processing cycle, subsequent requests\nshould be for all four forecast periods.\n2. Upon receipt of the forecasts, NMC will process the data on the\ncommunications computer to produce the necessary output, in grid point form,\nfor insertion into the flight planning and air traffic control computers.\nFor the data bulletins required for subsonic jet flight planning and air\ntraffic control, NMC will add the tropopause height information derived\nfrom the preceding NMC computer run. (Note: The tropopause height is not\nincluded in the AFGWC model.\n3-1","DIGITAL AVIATION WIND FORECAST FORMAT AND CONTENT\nData time.\nData base time.\nForecast period.\nU & V wind components (U/2 & V/2 kts.).\nTemperatures (Degrees C, see sign convention, Attachment 2).\nGrid: As described by Attachment 1.\nMessage Format: As described by Attachment 2.\nBulletin Headings: As described by Attachment 3.\nTransmission Method: High speed NWS circuit between NMC and the DOD\nAutomated Weather Network Management Center (AWNMC), Carswell AFB,\nand DOD circuitry between the AWNMC and AFGWC.\nVolume: Approximately 8,700 bits per sector record or approximately\n78,000 bits per data field (one level for one forecast period).\nTESTING OF THE BACKUP SYSTEM\nPeriodic testing of the product backup system is recommended. The frequency\nand duration of these tests will be agreed upon by the parties involved.\nAdvance notification will be given to circuit subscribers whenever such\ntests take place.\n3-2","LONGITUDE\n355\n354\n353\n352\n351\n90% N\n90°N\n85\n80\n5° LAT. X 10°\n75\nLONG,\n70\n65\n60\n60\n55\n50\n45\n2,5° LAT, X 2,5° LONG,\n40\n35\n30\n25\n20\n20\n36\n35\n34\n33\n32\n31\n30\n29\n28\n15\n5° LAT, X 5°\nLONG,\n27\n26\n25\n24\n23\n22\n21\n20\n19\n10\n18\n17\n16\n15\n14\n13\n12\n11\n10\n5\n09\n8\n7\n6\n5\n4\n3\n2\n1\n0\n30°W\n20°W\n10°W\n0°\n10°E\nSECTOR #1\nNOTE: Nine sectors per hemisphere, 355 points per sector. Point #1 is\nlower right and Point #355 is upper left.\nAttachment 1\n3-3","Sample Message Breakdown\n7741737607417\n111\n100\n00/1\n111\n011\n1/11\n110\n000/\n111\n100\n00/1\n111\n0\n7\n0\n0\nFCST VALID DATA/TIME 07/00Z\n07627417112\n000\n1/11\n110\n010/\n111\n100\n00/1\n111\n001\n0/01\n010\n000\n1\n2\n0\n2\nSpcl Chr.\nFCST PERIOD\nSector Number\n743743657717\n111\n100\n01/1\n111\n100\n0/11 110 101/ 111 111 00/1 111\n1\n8\n5\nu'=-4\nLevel Number\nLevel (MB)\nU component\n677376400002\n110 1/11 111 011/ 111 110 10/0 000 000 0/00 000\n010/\nv'=-3\nt'=-5\nu'=-6\nv'=0\nt'=2\nV comp\nTemp\nU comp\nV comp\nTemperature\nv=v'*2\nwhen t' negative\nu=u'*2\nt=-t'\nwhen t' positive\nAttachment 2\n3-4","BULLETIN HEADINGS\nMessages will be transmitted under bulletin headings as follows:\nBulletin Heading\nContents\n850-mb forecast for all required\nFDXN851/2/3/4\nKGWC\nsectors (first 2 digits). The third\ndigit (1, 2, 3 or 4) identifies the\nforecast period as being 1, 18, 24\nor 30 hours.\n700-mb forecast for all required\nFDXN701/2/3/4\nKGWC\nsectors, and so forth, as before.\n500-mb forecast, etc.\nFDXN501/2/3/4\nKGWC\nFDXN401/2/3/4\n400-mb forecast, etc.\nKGWC\n300-mb forecast, etc.\nFDXN301/2/3/4\nKGWC\n250-mb forecast, etc.\nFDXN251/2/3/4\nKGWC\n200-mb forecast, etc.\nFDXN201/2/3/4\nKGWC\n150-mb forecast, etc.\nFDXN151/2/3/4\nKGWC\nAttachment 3\n3-5","APPENDIX A\nCOMMUNICATIONS FACILITIES AND OPERATIONAL COMMUNICATIONS\nPROCEDURES FOR BACKUP\nThe communications facilities and the operational procedures for the backup\nof the NMC operational processing center and the NSSFC are described herein.\nFACSIMILE\nThe National Facsimile System (NAFAX) is the largest of the National Weather\nService (NWS) facsimile systems, with many Department of Defense (DOD) and\nNWS connections. Those NWS offices that do not have NAFAX generally have\nthe National and Aviation Meteorological System (NAMFAX), and there are\nalso many DOD connections to NAMFAX. In addition NAMFAX is extended to\nAlaska for the Intra-Alaska Facsimile System, to San Juan, P.R., to Canada,\nand to Mexico, whereas NAFAX is not.\nAny facsimile backup arrangement therefore, which involves NAFAX must also\ninclude NAMFAX for distribution purposes.\nThe FOFAX system serves all NWS Forecast Offices within the 48 conterminous\nstates. The system distributes meteorological products prepared at the\nNational Meteorological Center (NMC) as well as satellite products from\nthe National Environmental Satellite Service (NESS). There are also\nnumerous DOD connections on FOFAX.\nNAFAX\nThe National Facsimile circuit, WFX-1234, is a one-way only transmission\nsystem, with the entry point for the entire system being the Western Union\nplant (WU) in Washington, D.C. Transmissions originating at Suitland are\nentered on a local loop feeding through the test board at Western Union\nand thence out to the system. Transmissions originating at the NSSFC\nKansas City for NAFAX are brought into the Washington WU plant test board\n(via a Kansas City test board) for entry into the system on a circuit\nprovided by WU. The NAFAX WFX-1234 circuit transmissions are then fed into\nNAFAX circuit GD-60144 at Suitland.\nThe Air Force Global Weather Central has a WU WFX-1234 send/receive capability\nin their communications center operated by the AFCS. WU has provided a cir-\ncuit from Offutt into the WU Kansas City test board. This circuit can be\nlinked up by the NSSFC to the Washington circuit by switch operation in the\nNSSFC communications room. The AFGWC, therefore, has available communica-\ntions circuitry which can be used to back up the NSSFC-prepared charts\nas well as the NMC for NAFAX.\nA-1","NAMFAX\nNAMFAX is also a one-way only transmission system, with the entry point for\nthe entire system on the AT&T test board at \"Wash\" 3. Transmissions\noriginating at Suitland are entered on a local loop feeding through the\ntest board and thence out to the system. Transmissions originating at the\nNSSFC Kansas City for NAMFAX are brought into AT&T (Wash 3) via an AT&T\ntest board in Kansas City and thence to Suitland on circuit GF-10202. By\ninterexchange channel (IXC) switching under the control of Suitland, the\nsignal is passed on to the NAMFAX circuit GF-10201.\nThe Air Force Global Weather Central has a send capability on circuit\nGF-10602 between Offutt AFB and Kansas City NSSFC, via the AT&T test\nboard. The GF-10602 circuit can be linked up to GF-10202 by switch\noperation in the NSSFC communications room. GF-10202 can then be linked to\nGF-10201 (NAMFAX) by Suitland. As long as the NAFAX and NAMFAX schedules\nare the same the AFGWC transmissions can be made:\n1. Simultaneously to WFX-1234 for NAFAX and GF-10602 for NAMFAX.\n2. To WFX-1234 with relay to NAMFAX by Suitland Communications.\n3. To GF-10602 for NAMFAX and relay to WFX-1234 by Suitland\nCommunications.\nIf, at any time, separate schedules (additional charts for NAMFAX or 240\nscan per minute operation) are implemented, then NAFAX charts would be on\none path and NAMFAX on the other.\nThe NSSFC Kansas City can also use its jack field and patch cords to\ninterconnect GF-10602 and GF-10202 to provide a through circuit, Offutt AFB-\nSuitland or Offutt AFB-Washington. Suitland Communications (WBC) also has\njack fields permitting patch cord interconnection of circuits. The use of\npatch cords at end points such as NSSFC may result in some loss of signal\nquality.\nSee Figures 1, 2, and 3, for circuit arrangements.\nFOFAX\nThe FOFAX system is composed of three circuits. These circuits, GF-10206,\nGF-10207, and GF-10208, are all one-way only circuits in the system with the\nentry point for each circuit in the system in the AT&T \"Wash 3\" test board.\nTransmissions originating at the World Weather Building, Camp Springs, Md.,\nare transmitted over local tie lines to the main facsimile communications\ncenter at Suitland where they are patched through to the long lines circuits,\nalong with charts originating at Suitland.\nA-2","NAMFAX\nSUITLAND\nKWBC\n- ALL SEND/RECEIVE TERMINALS SIGNAL LEVEL OdBm EXCEPT * -12dBm\nRADAR CHARTS\nBROADCAST\nGF-10202\nMKC\nRADAR OVERLAY/EMERGENCY BACKUP\nEXISTING CIRCUITRY (TO REMAIN)\nFIG. 1\nINTEREXCHANGE CHANNEL SWITCHES\nCIRCUITRY\n- ALL CKTS TYPE 4002 WITH SPL COND.\no\nAFGWC\nOFFUTT\nX2 X3\no\nNSSFC\nMKC\nX\n1\no\nO\no\n*\nRADAR OVERLAY\nNORMALLY CLOSED\n- X2 NORMALLY CLOSED\nGF-10601\nPACIFIC\n- X3 NORMALLY Open\nSLC\n-\n- X\nX\n- 1\no\no\nX\n1\nINSTALLATION\nDATE 1-10-73\nGF-10610\nSW\nARFCC\nSLC\nWSFO SFO\nITT SFO","COMMUNICATIONS CIRCUITRY FOR BACKUP PURPOSES\nAFGWC\nOFFUTT AFB\nS\nWASH 3\nKANSAS CITY\nWASHINGTON\nTELCO\nGF-10201\nTELCO\nNAMFAX\nN.O.\nU.S.\nN.O.\nGF-10202\nALASKA\nSW\nSW\nCANADA\nMEXICO\nSAN JUAN\nR\nSW\nS\nR\nSW\nS\nS\nNSSFC KANSAS CITY\nWFX-1234\nNAFAX\nGD-60144\nWBC SUITLAND\nFIG. 2\nBACKUP SYSTEM - AT&T\nAFGWC\nOFFUTT AFB\nS\nWQ\nKANSAS CITY\nWASHINGTON\nW.U.\nW.U.\nN.O.\nN.C.\nW.U.\nTIE LINE\nWFX-1234\nSW\nSW\nNAFAX\nGD-60144\nR\nSW\nS\nSW\nR\nS\nS\nNSSFC KANSAS CITY\nNAMFAX\nSAN JUAN\nWBC SUITLAND\nFIG. 3\nBACKUP SYSTEM - W.U.\nA-4","NOTES:\nSW - Interexchange channel switch. Used to\nconnect two circuits together within\nTelco plant.\nR - Receive side of circuit\nS - Send side of circuit\nD - Bridging amplifiers within emergency\npower arrangement.\nN.O. - Switching path normally open\nN.C. - Switching path normally closed\nNote - Bridging can be accomplished by direct\npatch cord if necessary. Also inter-\nexchange switching can be performed\nby test board personnel if necessary.\nA-5","The Fleet Numerical Weather Central (FNWC), Monterey, Calif., has an\nalternate voice/data circuit which can be used for the transmission of\nNWS compatible facsimile of 120 scans per minute to the Fleet Weather\nFacility (FWF) Suitland, Md. The FWF can switch these transmissions\nthrough in-house pairs to the NWS communications station for relay to\nthe FOFAX system. See Figure 4 for circuit arrangements.\nEMERGENCY POWER\nThe NMC has emergency power for all essential communications oriented\nfacilities: the communications computers and associated peripheral equip-\nment (e.g., the Varian plotter, Interdata 50's, etc.) Emergency power is\nalso provided to WBC to operate facsimile scanner, amplifiers, switches,\nrelays, etc. The Air Force Global Weather Central (AFGWC) has uninterruptible\npower for its computers and emergency power for the operational facilities.\nThe NSSFC does not have emergency power generating capability available.\nMISCELLANEOUS\nThe AFCS unit supporting AFGWC has two Inter-Data 50 (ID50) computers on\nthe Air Force facsimile circuits. These ID50 systems can also transmit\ncharts on the NAFAX and NAMFAX circuits. These would be used in a backup\nsituation for NAFAX/NAMFAX. AFGWC has one spare scanner as backup to Air\nForce facsimile circuits and also for NAFAX/NAMFAX as well as a recorder to\nmonitor transmissions in a backup situation. However, the Air Force is\nin the process of replacing the COMPIX unit with mini-computers/converters.\nCOMMUNICATIONS PROCEDURES\n1. Upon notification that backup of NSSFC by AFGWC is required,\nNSSFC communications will operate the switches to close the paths from\nAFGWC through Kansas City to Washington. WBC Suitland should be notified\nso that switches are closed there. AFGWC would then make transmissions\nin lieu of NSSFC in the scheduled time slots at 120 scans per minute (spm)\non the WU circuit and on circuit GF-10602 at the scheduled times for NAMFAX.\n(At the time of writing AFGWC will transmit simultaneously on NAFAX and\nNAMFAX at 120 spm. See below.)\nIn the event of a malfunction of the switch, NSSFC will notify the appro-\npriate test board to close the switch or to make the path good via their\njack field. If the Western Union circuit is out of service, both the\n120 spm and the 240 spm transmissions can be made via GF-10602. If\nGF-10602 or GF-10202 is out of service then AFGWC can only transmit the\n120 spm NAFAX chart.\nA-6","COMMUNICATIONS CIRCUITRY FOR BACKUP PURPOSES\nFWF\nSuitland\nFNWC\nMonterey\nN.O.\nSW\nR\nSW\nSOURCE\nSOURCE\nInhouse\nPair\nS\nGDA-90663\nTELCO\nTELCO\nGF-10206\nS\nGF-10207\nS\nGF-10208\nS\nWBC\nSuitland\nFIG. 4\nNAVY BACKUP SYSTEM\nA-7","2. Upon notification that backup of NMC is required, the backup\nschedule will be in effect. As in 1. above, NSSFC will perform the\nswitching functions required at Kansas City. Until such time as a full\n240 spm capability exists at AFGWC, backup transmissions for NAFAX and\nNAMFAX should be run simultaneously on WFX-1234 and GF-10602 by Offutt.\nIf for some reason this cannot be accomplished by Offutt, the trans-\nmission should be made to GF-10602 with relay by WBC switches and patches.\nBACKUP FOR NMC COMMUNICATIONS COMPUTERS\nThe communications computers at the National Meteorological Center (NMC),\nSuitland, Md., are required to support weather communications affecting\nboth the Department of Defense and the Department of Commerce.\nThe NMC will maintain emergency power for all essential communications-\noriented facilities as noted above.\nThe communications center and the communications computers must remain\noperable to relay messages and data for NWS installations. In addition,\nthe DOD depends entirely on NMC for observed data from Canada, Alaska,\nparts of South America, and most ocean vessels other than those of the\nU.S. Navy. A11 of these data enter the NMC computers for which emergency\npower is provided.\nA-8","APPENDIX B\nNAFAX/NAMFAX BACKUP SCHEDULE\nChart\nHeading\nXMTD\nStart\nChart\nTime/VT\n(Type/Area)\nTime (Z)\nChart Description\nBy\nTime\n23Z\n0034\n10 Min\nRadar Summary\nADUS\nKMKC\nVT 12Z\n24\n72-Hr 200-MB Prog\nFUNH\nKGWC\n0110\nVT 01-18Z\n10\nSig Wea Prog\nFANA\nKGWC\n0140\n00Z\n0200\n20\nSFC Anal\nASUS\nKGWC\n00Z\n10\n500-MB Anal\nASUS 50\nKGWC\n0221\n01Z\n0232\n10\nRadar Summary\nADUS\nKMKC\n00Z\n0242\n10\n850-MB Wind Plot\nUXUS 85\nKGWC\n700-MB Wind Plot\n00Z\n0252\n10\nUXUS 70\nKGWC\n02Z\nRadar Summary\nADUS\nKMKC\n0322\n10\n00Z\nSFC Anal\n0400\n13\nASNH\nKGWC\n12/24 Hr SFC/Sig Wx\nVT 12/00Z\n0430\n20\nFXUS 1\nKGWC\n03Z\nSFC Anal\n0455\n20\nASUS\nKGWC\n04Z\nRadar Summary\n0524\n10\nADUS\nKMKC\nVertical Velocity\n0600\n23\nKGWC\nFVWH\n--\n0/12/24/36/42 Hrs\nRadar Summary\n05Z\n10\n0631\nADUS\nKMKC\nVT 18Z\n18-Hr 300-MB Prog\n0642\n19\nKGWC\nFUNH 38\n24-Hr 850-MB Prog\nVT 00Z\n10\nFUWH 85\n0703\nKGWC\nVT 00Z\n24-Hr 700-MB Prog\nFUWH 70\n0713\n10\nKGWC\n500-MB Vort. Anal\nVT 00Z\nFUXW 2\n0723\n23\nKGWC\n36-Hr SFC/Sig Wx Prog\nVT 12Z\nFXUS 2\n0746\n11\nKGWC\nVT 07-00Z\nSig Wx Prog\n0757\n10\nFANA\nKGWC\n06Z\n20\nSFC Anal\n0809\nASUS\nKGWC\n07Z\nRadar Summary\n0833\n10\nADUS\nKMKC\nVT 12Z\n36-Hr 300-MB Prog\nFUNH 30\nKGWC\n0856\n24\nVT 09-24Z\nSig Wx Prog\n0925\n7\nFAPA\nKGWC\n18Z\n10\nRadar Summary\n0936\nKMKC\nADUS\n06Z\nSFC Anal\n1000\n13\nASNH\nKGWC\n09Z\nRadar Summary\n1027\n10\nKMKC\nADUS\nVT 12Z\nSvr Wx Outlook\nKMWC\n1105\n5\nWWUS\n09Z\nSFC Anal\n20\n1110\nASUS\nKGWC\n10Z\n1129\n10\nRadar Summary\nKMKC\nADUS\n10\nGENOTS\n1210\nKMKC\n--\n--\n11Z\n10\nRadar Summary\n1230\nKMKC\nADUS\nVT 13-06Z\n1330\n10\nSig Wx Prog\nFANA\nKGWC\n12Z\n20\nSFC Anal\n1400\nKGWC\nASUS\n12Z\n500-MB Anal\n10\n1422\nASUS 50\nKGWC\n12Z\n850-MB Wind Plot\n11\n1457\nUXUS 85\nKGWC\n12Z\n700-MB Wind Plot\n11\n1510\nUXUS 70\nKGWC\n14Z\nRadar Summary\n10\n1526\nKGWC\nADUS\n12Z\nSFC Anal\n13\n1600\nKGWC\nASNH\n12/24 Hr SFC/Sig Wx\nVT 00/12Z\n20\n1630\nFXUS 1\nKGWC\nB-1","Heading\nXMTD\nStart\nChart\nChart\n(Type/Area)\nBy\nTime (Z)\nTime\nChart Description\nTime/VT\nASUS\nKGWC\n1700\n20\nSFC Anal\n15Z\nFUXW 2\nKGWC\n1720\n23\n500-MB Vort\n--\n0/12/24/36 Hr\nCIRCUIT\n1755\nLINEUP\n--\n--\nADUS\nKMKC\n1832\n10\nRadar Summary\n18Z\nFUNH 38\nKGWC\n1842\n19\n18-Hr 300-MB Prog\nVT 06Z\nFUWH 85\nKGWC\n1902\n10\n24-Hr 850-MB Prog\nVT 12Z\nFUWH 70\nKGWC\n1912\n10\n24-Hr 700-MB Prog\nVT 12Z\nFXUS 2\nKGWC\n1940\n11\n36-Hr SFC/Sig Wx Prog\nVT 00Z\nFVWH 23\nKGWC\n1951\n23\nVertical Velocity\n0/12/24/36 Hr\nASUS\nKGWC\n2014\n20\nSFC Anal\n16Z\nADUS\nKMKC\n2033\n10\nRadar Summary\n19Z\nFANA\nKGWC\n2052\n10\nSig Wx Prog\nVT 19-12Z\nFUNH 30\nKGWC\n2102\n24\n36-Hr 300-MB Prog\nVT 00Z\nADUS\nKMKC\n2128\n10\nRadar Summary\n20Z\nFAPA\nKGWC\n2147\n7\nSig Wx Prog\nVT 21-12Z\nASNH\nKGWC\n2200\n13\nSFC Anal\n18Z\nADUS\nKMKC\n2232\n10\nRadar Summary\n21Z\nASUS\nKGWC\n2300\n20\nSFC Anal\n21Z\nADUS\nKMKC\n2329\n10\nRadar Summary\n22Z\nNOTES: 1. KGWC transmissions by Air Force Communications Squadron,\nBldg. 301 (D) Offutt AFB, Nebr.\n2. FH - Front (N. American) Half. N.H.\n3. NH - Northern Hemisphere\n4. PA - Pacific\n5. US - United States\n6. WH - Western (Eurasian) Half, N.H.\n7. XW - Special North American Section\n(NWS Chart)\n8.\nTransmissions of prepared charts at 120 scans\nB-2","APPENDIX C\nPLAN FOR STAGE 1 BACKUP OF NMC BY FNWC, MONTEREY\nWhen the Stage 1 backup requirement for NMC is invoked, FNWC will provide\n0-72 hr. output for use by the NMC Forecast Division. The list of charts\nto be produced is attached with a schedule for their delivery. The\nfollowing nomenclature is used:\nPS\n- Surface\nD500 - 500 mb\nH5-10 - 1000-500 thickness\nD300 - 300 mb\nPcpn - 12-hr. precipitation amounts\nThe plan can be invoked at anytime by calling both of the following\nnumbers:\nMonterey/Forecast Duty Officer - Commercial 408-646 ext. 2137\nSuitland Fleet Weather Facility/Forecast Duty Officer -\next. 35972, 35973, or Commercial 735-8393\nIf the call is placed prior to data time +1 hour (0100Z/1300Z), , NMC will\nreceive the run from that data using a 2+25 data dump.\nC-1","Schedule based on 2:25 data cut\nEst. Chart Avail.\nProduced\nFWF Suitland\nProduct\nat FNWC\n2:50/14:50\n3:05/15:05\nPS\nAnalysis\n\"\n3:40\n3:15\nD500\n\"\n\"\n\"\nH5-10\n\"\n11\n\"\nD300\n3:35\n3:55\nPCPN\n12-Hr Prog\n11\n\"\n\"\nD300\n4:20-4:30*\nPS\n24-Hr Prog\n3:50\n\"\n\"\n\"\nD500\n\"\n\"\n\"\nH5-10\n\"\n\"\n11\nPCPN\n11\n\"\n\"\nD300\n4:40-5:00*\n4:05\nPS\n36-Hr Prog\n11\n11\n11\nD500\n\"\n\"\n11\nH5-10\n\"\n\"\n11\nPCPN\n\"\n\"\n11\nD300\n5:10-5:20*\n4:20\nPS\n48-Hr Prog\n\"\n\"\n\"\nD500\n\"\n11\n\"\nH5-10\n11\n11\n\"\nPCPN\n5:30\n4:45\nPS\n72-Hr Prog\n\"\n\"\n11\nD500\n*First time listed is for time of availability of 3 charts, remaining\n1 or 2 charts available at second time listed.\nAssumptions: 1. Transmissions to FWF Suitland well coordinated and\nefficient.\n2. Suitland has 3 auto-plotters available, can receive and\nprocess data onto 3 tapes so that all auto-plotters\ncan be going at once.\n3. Times based on average of:\n1 min/chart at FNWC to produce pen commands\n1-1/2 min/chart to transmit\n1-1/2 min/chart at Suitland to unpack pen commands\n6 min/chart to plot\nPlotted charts are northern hemispheric 1/60 million\n4.\nscale.\nNote: This schedule will continue on each operational cycle until FNWC\nis informed that backup is no longer needed.\nC-2","APPENDIX D\nFNWC BACKUP OF FOFAX\nEND\nSTART\nGMT\nPRODUCT\nGMT\n0326 (1526)\nPS Analysis (Atlantic and Pacific)\n0243 (1443)\n0704 (1904)\nPS 12-, 24-, 36-, 48-hr Progs\n0637 (1837)\nH5-10, 12-, 24-, 36-, 48-hr Progs\n0825 (2025)\nD500 24-, 36-hr Progs\n0730 (1930)\nPCPN 24-, 36-hr Progs of\n12-hr Amounts (in.)\n0936 (2136)\nSOWM Wave Height Analysis and\n0828 (2028)\n24-hr Progs (Atlantic and Pacific)\nWave Heights, 36-, & 48-hr Progs\n* U. S. GOVERNMENT PRINTING OFFICE 1977-240-848/17\nD-1"]}