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National Weather Service (NWS)

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This collection contains reports and materials published by the National Weather Service and NWS researchers. Included are technical reports and memorandums, as well as special publications and some video covering a variety of topics such as climate science, space weather, the atmosphere and meteorology.

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Showing 21 - 40 of 5522 results
  • Gulf Stream System landward surface edge statistics
    Gulf Stream System landward surface edge statistics
    Auer, Stephen J.
    1983 | NOAA technical memorandum NWS NMC ; 67 | PDF
    This paper represents a statistical evaluation of the mean position, standard deviation, and maximum northward and southward positions of the Gulf Stream System landward surface edge. The surface edge is determined for each 0.5° longitudinal transect from 91°-44°W measuring the course of the Gulf Stream System from the Yucatan Strait to the Grand B ...
    Supporting Files
  • The LFMII model 1980
    The LFM-II model -- 1980
    Newell, John E. ;
    Deaven, Dennis G.
    1981 | NOAA technical memorandum NWS NMC ; 66 | PDF
    The changes incorporated in the LFM model since the end of 1976 are documented. Emphasis is placed on the computational grids used by the model and on its vertical structure. The calculation of donvective precipitation and the vertical interpolation from the model's coordinate to isobaric surfaces for display purposes are treated in detail. The cir ...
    Supporting Files
  • Operationaltype analyses derived without radiosonde data from Nimbus 5 and NOAA 2 temperature soundings
    Operational-type analyses derived without radiosonde data from Nimbus 5 and NOAA 2 temperature soundings
    Bonner, William D. ;
    Van Haaren, Robert
    1976 | NOAA technical memorandum NWS NMC ; 58 | PDF
    Test analyses were produced with the NMC global analysis/forecast system using only surface reports and satellite temperature soundings. Data were assimilated over a period of 4 days using a 6-hr analysis/ forecast cycle. The final test analysis describes the major features shown on the corresponding NMC analysis but underestimates the amplitudes o ...
    Supporting Files
  • Addition of orography to the semiimplicit version of the ShumanHovermale model
    Addition of orography to the semi-implicit version of the Shuman-Hovermale model
    Campana, Kenneth A.
    1978 | NOAA technical memorandum NWS NMC ; 62 | PDF
    The semi-implicit version of the ShumanHovermale model now includes orography. The incorporation of mountains into the model was made with great difficulty and is documented in this report. Care must be taken when splitting the pressure gradient term in the equations of motion into implicit and explicit parts. The orographic effect on the pressure ...
    Supporting Files
  • The use of drifting buoy data at NMC
    The use of drifting buoy data at NMC
    Wright, David
    1980 | NOAA technical memorandum NWS NMC ; 64 | PDF
    The value to NMC surface pressure analyses of data from the Drifting Buoy System over the Southern Hemisphere oceans during the Special Observing Periods SOP - 1 and SOP - 2 in 1978-79 is evaluated. Buoy locations and numbers of observations are shown.
    Supporting Files
  • Decomposition of a wind field on the sphere
    Decomposition of a wind field on the sphere
    Dey, Clifford H. ;
    Brown, John Atkins, 1930-
    1976 | NOAA technical memorandum NWS NMC ; 59 | PDF
    When decomposing a horizontal wind field into its rotational and divergent components, care must be taken to assure compensating truncation errors in order that the resulting wind components can be used to accurately reconstruct the original field. An example is presented of a finite difference system with second-order accuracy for a regular spheri ...
    Supporting Files
  • Monthly relative frequencies of precipitation for the United States for 6 12 and 24H periods
    Monthly relative frequencies of precipitation for the United States for 6-, 12-, and 24-H periods
    Jensenius, John S. ;
    Erickson, Mary C.
    1987 | NOAA technical report NWS ; 39 | PDF
    Climatic relative frequencies of various amounts of precipitation are presented for 6-, 12-, and 24-h periods. These relative frequencies were determined from observed precipitation data based on a 13-year sample. Values are given for approximately 240 stations in the United States for precipitation amounts of greater than or equal to .01, .2S, .SO ...
  • Azimuthal Distribution of Deep Convection Environmental Factors and Tropical Cyclone Rapid Intensification A Perspective from HWRF Ensemble Forecasts of Hurricane Edouard 2014
    Azimuthal Distribution of Deep Convection, Environmental Factors, and Tropical Cyclone Rapid Intensification: A Perspective from HWRF Ensemble Forecasts of Hurricane Edouard (2014)
    Leighton, Hua ;
    Gopalakrishnan, Sundararaman
    2018 | Journal of the Atmospheric Sciences, 75(1), 275-295.
    Forecasts from the operational Hurricane Weather Research and Forecasting (HWRF)-based ensemble prediction system for Hurricane Edouard (2014) are analyzed to study the differences in both the tropical cyclone inner-core structure and large-scale environment between rapidly intensifying (RI) and nonintensifying (NI) ensemble members. An analysis of ...
  • Projected Changes in South Asian Monsoon Lowpressure Systems
    Projected Changes in South Asian Monsoon Low-pressure Systems
    Dong, Wenhao ;
    Ming, Yi
    2020 | Journal of Climate, 33(17), 7275-7287, 2020 | PDF
    Monsoon low pressure systems (MLPSs) are among the most important synoptic-scale disturbances of the South Asian summer monsoon. Potential changes in their characteristics in a warmer climate would have broad societal impacts. Yet, the findings from a few existing studies are inconclusive. We use the Geophysical Fluid Dynamics Laboratory (GFDL) cou ...
  • National hurricane operations plan 1989
    National hurricane operations plan [1989]
    United States. National Oceanic and Atmospheric Administration.  ...
    1989 | FCM (Series) ; P12-1989 | PDF
    This publication is the 27th edition of the National Hurricane Operations Plan (NHOP) It reflects the procedures and agreements reached at the 43rd Interdepartmental Hurricane Conference (IHC), which was held at the U.S. Air Force Conference Center, Homestead Air Force Base, Florida, January 10-13, 1989. Details of the conference can be found in th ...
    Supporting Files
  • National hurricane operations plan 1977
    National hurricane operations plan [1977]
    United States. National Oceanic and Atmospheric Administration.  ...
    1977 | FCM (Series) ; 77-2 | PDF
    An Interdepartmental Plan was first issued in 1962. This document is the 15th edition and presents procedures and agreements reached at the annual Interdepartmental Hurricane Warning Conference. The 31st annual Conference was held at the USAF Military Airlift Command Headquarters, Scott Air Force Base, Illinois, January 11-13, 1977. The Conference ...
    Supporting Files
  • National hurricane operations plan 1988
    National hurricane operations plan [1988]
    United States. National Oceanic and Atmospheric Administration.  ...
    1988 | FCM (Series) ; P12-1988 | PDF
    This publication is the 26th edition of the National Hurricane Operations Plan (NHOP). It is a compilation of the procedures and agreements reached at the 42nd Interdepartmental Hurricane Conference (IHC), which was held at the U.S. Air Force Conference Center, Homestead Air Force Base, Florida, January 12-15, 1988. Details of the conference can be ...
    Supporting Files
  • National hurricane operations plan 1987
    National hurricane operations plan [1987]
    United States. National Oceanic and Atmospheric Administration.  ...
    1987 | FCM (Series) ; P12-1987 | PDF
    The first Interdepartmental Hurricane Operations Plan was issued in 1962. This document is the 25th edition and presents procedures and agreements reached at the 41st Annual Interdepartmental Hurricane Conference held at the United States Air Force Conference Center, Homestead Air Force Base, Florida, 6-9 January 1987.
    Supporting Files
  • National hurricane operations plan 1986
    National hurricane operations plan [1986]
    United States. National Oceanic and Atmospheric Administration.  ...
    1986 | FCM (Series) ; P12-1986 | PDF
    An Interdepartmental Plan was first issued in 1962. This document is the 24th edition and presents procedures and agreements reached at the 40th annual Interdepartmental Hurricane Conference held at the USAF Conference Center, Homestead Air Force Base, Florida, 7-10 January 1986.
    Supporting Files
  • National hurricane operations plan 1984
    National hurricane operations plan [1984]
    United States. National Oceanic and Atmospheric Administration.  ...
    1984 | FCM (Series) ; P12-1984 | PDF
    An Interdepartmental Plan was first issued in 1962. This document is the 22nd edition and presents procedures and agreements reached at the 38th annual Interdepartmental Hurricane Conference held at the USAF Conference Center, Homestead Air Force Base, Florida, 24-26 January 1984.
    Supporting Files
  • National hurricane operations plan 1985
    National hurricane operations plan [1985]
    United States. National Oceanic and Atmospheric Administration.  ...
    1985 | FCM (Series) ; P12-1985 | PDF
    An Interdepartmental Plan was first issued in 1962. This document is the 23rd edition and presents procedures and agreements reached at the 39th annual Interdepartmental Hurricane Conference held at the USAF Conference Center, Homestead Air Force Base, Florida, 8-11 January 1985.
    Supporting Files
  • National hurricane operations plan 1981
    National hurricane operations plan [1981]
    United States. National Oceanic and Atmospheric Administration.  ...
    1981 | FCM (Series) ; P12-1981 | PDF
    An Interdepartmental Plan was first issued in 1962. This document is the 19th edition and presents procedures and agreements reached at the 35th annual Conference held at the USAF Conference Center, Homestead Air Force Base, Florida, 27-29 January 1981.
    Supporting Files
  • National hurricane operations plan 1980
    National hurricane operations plan [1980]
    United States. National Oceanic and Atmospheric Administration.  ...
    1980 | FCM (Series) ; 80-2 | PDF
    An Interdepartmental Plan was first issued in 1962. This document is the 18th edition and presents procedures and agreements reached at the 34th annual Conference held at the USAF Conference Center, Homestead Air Force Base, FL, 22-25 January 1980.
    Supporting Files
  • National winter storms operations plan 2000
    National winter storms operations plan, 2000
    United States. Office of Federal Coordinator for Meteorological Services and Supporting Research
    2000 | FCM (Series) ; P13-2000 | PDF
    This is the 25th edition of the National Winter Storms Operations Plan. The purpose of the plan is to coordinate the efforts of the federal meteorological community to provide enhanced weather observations of severe winter storms that impact the coastal regions of the United States. The goal is to improve the accuracy and timeliness of severe winte ...
    Supporting Files
  • National winter storms operations plan 1998
    National winter storms operations plan, 1998
    United States. Office of Federal Coordinator for Meteorological Services and Supporting Research
    1998 | FCM (Series) ; P13-1998 | PDF
    This is the 24th edition of the National Winter Storms Operations Plan. The purpose of the plan is to coordinate the efforts of the federal meteorological community to provide enhanced weather observations of severe winter storms that impact the coastal regions of the United States
    Supporting Files
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