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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 1 - 20 of 5522 results
  • Surface winds and oil slick transport calculated from Rossby number similarity theory
    Surface winds and oil slick transport calculated from Rossby number similarity theory
    Fredricksen, Ellin J. ;
    Wagner, Norman K.
    1979 | Report (University of Texas at Austin. Atmospheric Science Group) ; 51 | PDF
    Rossby number similarity theory has been used to calculate surface winds and transport of an oil slick over the ocean. Calculations were compared with observed data from the ARGO MERCHANT wreck site during the month of December, 1976.
  • A Numerical experiment on the simulation and modification of hurricane rainband clouds
    A Numerical experiment on the simulation and modification of hurricane rainband clouds
    Orville, H. D. (Harold D.) ;
    Chang, Wei-Jean
    1972 | Report (South Dakota School of Mines and Technology. Institute of Atmospheric Sciences) ; 72-12 | PDF
    A numerical model of cloud growth over a mountain has been modified to simulate the formation and development of hurricane rainband clouds. The first and the third equations of motion, a thermodynamic energy equation, and water conservation equations for cloud substances, rain, and precipitating ice are solved numerically. The model is timedependen ...
  • Evaluation of Lightning Flash Rate Parameterizations in a CloudResolved WRFChem Simulation of the 2930 May 2012 Oklahoma Severe Supercell System Observed During DC3
    Evaluation of Lightning Flash Rate Parameterizations in a Cloud‐Resolved WRF‐Chem Simulation of the 29–30 May 2012 Oklahoma Severe Supercell System Observed During DC3
    Cummings, K. A. ;
    Pickering, K. E.
    2024 | Journal of Geophysical Research: Atmospheres, 129(11) | PDF
    Eighteen lightning flash rate parameterization schemes (FRPSs) were investigated in a Weather Research and Forecasting model coupled with chemistry cloud‐resolved simulation of the 29–30 May 2012 supercell storm system observed during the Deep Convective Clouds and Chemistry (DC3) field campaign. Most of the observed storm's meteorological conditio ...
  • Climate assessment a decadal review 19811990
    Climate assessment : a decadal review, 1981-1990
    Halpert, Michael S. ;
    Ropelewski, C. F.
    1991 | State of the Climate | PDF
    The publication of this annual Climate Assessment is the second time we have attempted to summarize contemporary climate data and statistics on the state of the global climate system. This year, at the end of the decade, we have focused on global observations from an historical perspective.
    Supporting Files
  • Physics schemes in the first version of NCEP operational hurricane analysis and forecast system HAFS
    Physics schemes in the first version of NCEP operational hurricane analysis and forecast system (HAFS)
    Wang, Weiguo ;
    Han, Jongil
    2024 | Frontiers in Earth Science, 12 | PDF
    This document summarizes the physics schemes used in two configurations of the first version of the operational Hurricane Analysis and Forecast System (HAFSv1) at NOAA NCEP. The physics package in HAFSv1 is the same as that used in NCEP global forecast system (GFS) version 16 except for an additional microphysics scheme and modifications to sea sur ...
  • Forecasting tropical cyclone tornadoes and impacts Report from IWTCX
    Forecasting tropical cyclone tornadoes and impacts: Report from IWTC-X
    Carroll-Smith, Dereka ;
    Green, Benjamin W.
    2023 | Tropical Cyclone Research and Review, 12(2), 123-135 | PDF
    This report synthesizes global tropical cyclone (TC) tornado research and operational practices to date. Tornadoes are one of the secondary (and lesser researched) hazards contributing to the devastation TCs leave in their wake. While gale-force winds and storm surge produce the majority of damage and fatalities globally, TC tornadoes also pose a f ...
  • Envisioning the Future of Community Physics
    Envisioning the Future of Community Physics
    Firl, Grant ;
    Bernardet, Ligia
    2024 | Bulletin of the American Meteorological Society, 105(3), E639-E644 | PDF
    On 15–17 August 2023, 81 scientists, engineers, and code managers in the atmospheric model development community gathered virtually to discuss the current status and the future direction of the Common Community Physics Package (CCPP).
  • National hurricane operations plan 1995
    National hurricane operations plan [1995]
    United States. National Oceanic and Atmospheric Administration.  ...
    1995 | FCM (Series) ; P12-1995 | PDF
    This publication is the 33rd edition of the National Hurricane Operations Plan (NHOP). It is a compilation of the procedures and agreements reached at the 49th Interdepartmental Hurricane Conference (IHC), which was held in Miami, Florida, February 14-17, 1995. Details of the conference can be found in the minutes published by this office.
    Supporting Files
  • National hurricane operations plan 1994
    National hurricane operations plan [1994]
    United States. National Oceanic and Atmospheric Administration.  ...
    1994 | FCM (Series) ; P12-1994 | PDF
    This publication is the 32nd edition of the National Hurricane Operations Plan (NHOP). It is a compilation of the procedures and agreements reached at the 48th Interdepartmental Hurricane Conference (IHC), which was held in Miami, Florida, February 15-18, 1994. Details of the conference can be found in the minutes published by this office.
    Supporting Files
  • National hurricane operations plan 1993
    National hurricane operations plan [1993]
    United States. National Oceanic and Atmospheric Administration.  ...
    1993 | FCM (Series) ; P12-1993 | PDF
    This publication is the 31st edition of the National Hurricane Operations Plan (NHOP). It is a compilation of the procedures and agreements reached at the 47th Interdepartmental Hurricane Conference (IHC), which was held in Miami, Florida, February 22-26, 1993. Details of the conference can be found in the minutes published by this office.
    Supporting Files
  • National hurricane operations plan 1992
    National hurricane operations plan [1992]
    United States. National Oceanic and Atmospheric Administration.  ...
    1992 | FCM (Series) ; P12-1992 | PDF
    This publication is the 30th edition of the National Hurricane Operations Plan (NHOP). It is a compilation of the procedures and agreements reached at the 46th Interdepartmental Hurricane Conference (IHC), which was held at the United States Air Force Conference Center, Homestead Air Force Base, Florida, January 14-17, 1992. Details of the conferen ...
    Supporting Files
  • National hurricane operations plan 1990
    National hurricane operations plan [1990]
    United States. National Oceanic and Atmospheric Administration.  ...
    1990 | FCM (Series) ; P12-1990 | PDF
    This publication is the 28th edition of the National Hurricane Operations Plan (NHOP). It is a compilation of the procedures and agreements reached at the 44th Interdepartmental Hurricane Conference (IHC), which was held at the U.S. Air Force Conference Center, Homestead Air Force Base, Florida, January 9-12, 1990. Details of the conference can be ...
    Supporting Files
  • National hurricane operations plan 1991
    National hurricane operations plan [1991]
    United States. National Oceanic and Atmospheric Administration.  ...
    1991 | FCM (Series) ; P12-1991 | PDF
    This publication is the 29th edition of the National Hurricane Operations Plan (NHOP). It is a compilation of the procedures and agreements reached at the 45th Interdepartmental Hurricane Conference (IHC), which was held at the United States Air Force Conference Center, Homestead Air Force Base, Florida, February 5-8, 1991. Details of the conferenc ...
    Supporting Files
  • Interpreting WarnonForecast System Guidance Part I Review of Probabilistic Guidance Concepts Product Design and Best Practices
    Interpreting Warn-on-Forecast System Guidance, Part I: Review of Probabilistic Guidance Concepts, Product Design, and Best Practices
    Skinner, Patrick S. ;
    Wilson, Katie A.
    2023 | Journal of Operational Meteorology (2023) | PDF
    The Warn-on-Forecast System (WoFS) is a convection-allowing ensemble prediction system designed to primarily provide guidance on thunderstorm hazards from the meso-beta to storm-scale in space and from several hours to less than one hour in time. This article describes unique aspects of WoFS guidance product design and application to short-term sev ...
  • A modified vertical eddy diffusivity parameterization in the HWRF model based on large eddy simulations and its impact on the prediction of two landfalling hurricanes
    A modified vertical eddy diffusivity parameterization in the HWRF model based on large eddy simulations and its impact on the prediction of two landfalling hurricanes
    Li, Xin ;
    Pu, Zhaoxia
    2023 | Frontiers in Earth Science, 11 | PDF
    Vertical eddy diffusivity (VED) in the planetary boundary layer (PBL) has a significant impact on forecasts of tropical cyclone (TC) structure and intensity. VED uncertainties in PBL parameterizations can be partly attributed to the model’s inability to represent roll vortices (RV). In this study, RV effects on turbulent fluxes derived from a large ...
  • LongTerm Bias Stability of the GOESNOP Magnetometers
    Long‐Term Bias Stability of the GOES‐NOP Magnetometers
    Califf, S. ;
    Rich, F. J.
    2023 | Earth and Space Science, 10(11) | PDF
    We characterize the long‐term bias stability of the GOES‐NOP series magnetometers (GOES‐13, 14, and 15) using data from 2013 through 2018. Bias stability is inferred using three methods: comparing the inboard and outboard measurements on each spacecraft, comparing the individual measurements to the TS04 magnetic field model, and comparing measureme ...
  • Mitigation Efforts to Address Rapid Refresh Forecast System RRFS v1 Dynamical Core Performance Issues and Recommendations for RRFS v2
    Mitigation Efforts to Address Rapid Refresh Forecast System (RRFS) v1 Dynamical Core Performance Issues and Recommendations for RRFS v2
    Carley, Jacob ;
    Alexander, Curtis
    2023 | Office note (National Centers for Environmental Prediction (U.S.)) ; 516 | PDF
    The RRFS is being developed as the flagship convective-scale ensemble-based prediction system for NWS operations to replace legacy limited-area modeling systems currently in operations in early calendar year 2025. The RRFS is an application based on the Unified Forecast System (UFS) and, like other UFS-based applications, uses the FV3 dynamical cor ...
  • The LFM model 1976 a documentation
    The LFM model - 1976 : a documentation
    Gerrity, Joseph P.
    1977 | NOAA technical memorandum NWS NMC ; 60 | PDF
    The Limited-Area, Fine-Mesh model (LFM), used operationally at the National Meteorological Center (NMC), is documented. Emphasis is placed upon the model's mathematical and physical approximations, and upon the methods used to initialize the model's cr-coordinated variables from the analyzed fields. The information presented was current at the end ...
    Supporting Files
  • Daynight differences in radiosonde observations of the stratosphere and troposphere
    Day-night differences in radiosonde observations of the stratosphere and troposphere
    Mclnturff, Raymond M. ;
    Finger,Frederick G.
    1979 | NOAA technical memorandum NWS NMC ; 63 | PDF
    Day-night differences in temperature and height are used as the basis for a system designed to achieve compatibility between data measured by various radiosonde instruments. The resultant compatibility adjustments in reported data are a prerequisite to the analysis of stratospheric constant-pressure charts above the 100-mb level, and for some instr ...
    Supporting Files
  • Semiimplicit higher order version of the ShumanHovermale model
    Semi-implicit higher order version of the Shuman-Hovermale model
    Campana, Kenneth A.
    1978 | NOAA technical memorandum NWS NMC ; 61 | PDF
    The atmospheric numerical model developed by Shuman and Hovermale at the National Meteorological Center has been reformulated for semiimplicit integration. Orography, moisture, friction, and diabatic effects have been incorporated into this new model. Higher order horizontal finite differencing is used in the advective terms of the model equations ...
    Supporting Files
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