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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 41 - 60 of 5593 results
  • A formulation of the Hexad algorithm using the geometry of the Fano projective plane
    A formulation of the Hexad algorithm using the geometry of the Fano projective plane
    Purser, Robert James
    2020 | Office note (National Centers for Environmental Prediction (U.S.)) ; 499
    We have described a new formulation of the ‘Hexad Algorithm’ for decomposing a given 3D symmetric positive-definite aspect tensor on a lattice into its six unique local line generators and corresponding projected rank-one aspect tensor contributions. The new formulation adheres strictly to the symmetries possessed by the associated Fano projective ...
  • Recent changes in the new mediumrange forecast MRF model
    Recent changes in the new medium-range forecast (MRF) model
    Caplan, Peter
    1985 | Office note (National Centers for Environmental Prediction (U.S.)) ; 307
    "On January 26, 1985, two modifications to the daily experimental runs of the new medium-range spectral model were simultaneously implemented; one was the use of "silhouette" mountains, the other a small correction of some aspects of the treatment of water vapor, to be referred to here as the virtual temperature correction. In addition to some befo ...
  • Orographic snowfall rate model for Alta Utah
    Orographic snowfall rate model for Alta, Utah
    Todd, Steven K. ;
    Rasch, Glenn E.
    1981 | NOAA Western Region computer programs and problems NWS WRCP ; no. 34
    No Description
  • A relationship between snow accumulation and snow intensity as determined from visibility
    A relationship between snow accumulation and snow intensity as determined from visibility
    Wasserman, Stanley E. ;
    Monte, Daniel J.
    1971 | NOAA technical memorandum NWS ER ; 41
    "A procedure is presented for estimating hourly snow accumulation at LaGuardia Field, N. Y., from observations of snow intensity or visibility. A relationship between reported snow intensity and estimated snowfall is shown on independent data to be reliable. Results can be applied as an aid in forecasting additional snow accumulation and in estimat ...
  • Role of eyewall and rainband eddy forcing in tropical cyclone intensification
    Role of eyewall and rainband eddy forcing in tropical cyclone intensification
    Zhu, Ping ;
    Tyner, Bryce
    2019 | Atmos. Chem. Phys., 19(22), 14289-14310. | PDF
    No Description
  • The use of profiler data for analysis and NOWcasting of a winter season extratropical cyclone
    The use of profiler data for analysis and NOWcasting of a winter season extratropical cyclone
    Small, Bradley S.
    1994 | NOAA technical memorandum NWS CR ; 106
    No Description
  • Soaring forecast program
    Soaring forecast program
    Gudgel, Dan ;
    Iguchi, Hiroshi
    1994 | NOAA Western Region computer programs and problems NWS WRCP ; no. 36
    No Description
  • Sea Fetch Observed by Synthetic Aperture Radar
    Sea Fetch Observed by Synthetic Aperture Radar
    Li, Xiaofeng ;
    Zheng, Weizhong
    2017 | IEEE Transactions on Geoscience and Remote Sensing, 55(1), 272-279 | PDF
    Two satellite synthetic aperture radar (SAR) observations of the fetch in the Bohai Sea of China are presented. The sea surface winds derived from SAR data indicated a high wind of 15-16 m/s that occurred in the fetch zone. The winds are shown to have immediate direct mechanical forcing impacts on the significant wave heights (Hs) of ocean surface ...
  • Impact Assessment of Himawari8 AHI Data Assimilation in NCEP GDASGFS with GSI
    Impact Assessment of Himawari-8 AHI Data Assimilation in NCEP GDAS/GFS with GSI
    Ma, Zaizhong ;
    Maddy, Eric S.
    2017 | Journal of Atmospheric and Oceanic Technology, 34(4), 797-815
    As the first of the next-generation geostationary meteorological satellites, Himawari-8 was successfully launched in October 2014 by the Japan Meteorological Agency (JMA) and placed over the western Pacific Ocean domain at 140.7°E. It carries the Advanced Himawari Imager (AHI), which provides full-disk images of Earth at 16 bands in the visible and ...
  • Digital Technologies for Environmental Peacebuilding
    Digital Technologies for Environmental Peacebuilding
    Martinez Sequero, Albert ;
    Zia, Asim
    2024 | United Nations Environment Programme (2024). Digital Technologies for Environmental | pdf
    The accelerating deployment of digital technologies, much like previous revolutions in human history, holds the potential to fundamentally transform our world. Frontier technologies such as the Internet of Things (IoT), big data, and artificial intelligence (AI) offer groundbreaking capabilities to address the triple planetary crises of climate cha ...
  • An objective forecast technique for Colorado downslope winds
    An objective forecast technique for Colorado downslope winds
    Sangster, Wayne E.
    1972 | NOAA technical memorandum NWS CR ; 50
    No Description
  • Building an Interannual to Decadal Prediction and Projection Capability for Decision Support
    Building an Interannual to Decadal Prediction and Projection Capability for Decision Support
    United States. National Weather Service  ...
    2019
    This exploratory workshop is a preliminary discussion of the need for coordinated updating of physical Earth system predictions to support a wide range of long-term decisions drawing on multi-agency expertise and existing or emerging capabilities. The workshop focused on the challenges of providing and maintaining an updating, but non-operational c ...
  • Heat Disparities and Health Outcomes in San Diego Countys Diverse Climate Zones
    Heat, Disparities, and Health Outcomes in San Diego County's Diverse Climate Zones
    Guirguis, Kristen ;
    Basu, Rupa
    2018 | GeoHealth 2(7), 212-223, 2018
    Climate variability and change are issues of growing public health importance. Numerous studies have documented risks of extreme heat on human health in different locations around the world. Strategies to prevent heat‐related morbidity and reduce disparities are possible but require improved knowledge of health outcomes during hot days at a small‐s ...
  • Evaluation of a laser for use as a transmissometer calibrator
    Evaluation of a laser for use as a transmissometer calibrator
    George, David H. ;
    McCann, Robert J.
    1970 | FAA-RD ; 70-1 | pdf
    A laser transmissometer was evaluated for use in providing an objective method of calibrating the NBS-type transmissometer to the light transmission characteristics of the atmosphere in all weather and visibility conditions. The laser transmissiometer was tested by using it to calibrate an NBS-type transmissometer. Visibility measurements from the ...
  • A 10Year Survey of Tropical Cyclone InnerCore Lightning Bursts and Their Relationship to Intensity Change
    A 10-Year Survey of Tropical Cyclone Inner-Core Lightning Bursts and Their Relationship to Intensity Change
    Stevenson, Stephanie N. ;
    Corbosiero, Kristen L.
    2018 | Weather and Forecasting, 33(1)
    This study seeks to reconcile discrepancies between previous studies analyzing the relationship between lightning and tropical cyclone (TC) intensity change. Inner-core lightning bursts (ICLBs) were identified from 2005 to 2014 in North Atlantic (NA) and eastern North Pacific (ENP) TCs embedded in favorable environments (e.g., vertical wind shear ≤ ...
  • Standardized format for computer series
    Standardized format for computer series
    United States, National Weather Service., Western Region
    1979 | NOAA Western Region computer programs and problems NWS WRCP ; 1
    No Description
  • An operational subsynoptic advection model
    An operational subsynoptic advection model
    Glahn, Harry R. ;
    Lowry, Dale Andrew
    1969 | ESSA technical memorandum WBTM TDL ; 23
    No Description
  • The National Oceanic and Atmospheric Administrations Report on Requiring the TsunamiReady Program to be Accredited by the Emergency Management Accreditation Program
    The National Oceanic and Atmospheric Administration’s Report on Requiring the TsunamiReady Program to be Accredited by the Emergency Management Accreditation Program
    National Weather Service (U.S.)
    2018
    The Emergency Management Accreditation Program (EMAP) is an independent, non-profit organization that oversees a very specific program through which all-hazard emergency management programs are accredited. The National Weather Service (NWS) TsunamiReady® program is not a comprehensive emergency management program and is intended to be a voluntary c ...
    Supporting Files
  • PrecipitationFrequency Atlas of the United States Volume 1 Version 50 Semiarid Southwest Arizona Southeast California Nevada New Mexico Utah
    Precipitation-Frequency Atlas of the United States, Volume 1 Version 5.0: Semiarid Southwest (Arizona, Southeast California, Nevada, New Mexico, Utah)
    Bonnin, Geoffrey M. ;
    Martin, Deborah
    2004; Rev. 2006; Rev. 2011 | NOAA atlas ; 14
    NOAA Atlas 14 contains precipitation frequency estimates for the United States and U.S. affiliated territories with associated lower and upper bounds of the 90% confidence interval and supplementary information on temporal distribution of heavy precipitation, analysis of seasonality and trends in annual maximum series data, etc. It includes pertine ...
  • An evaluation of three methods for measuring black carbon in Alert Canada
    An evaluation of three methods for measuring black carbon in Alert, Canada
    Sharma, Sangeeta ;
    Leaitch, W. Richard
    2017 | Atmospheric Chemistry and Physics, 17(24), 15225-15243.
    Absorption of sunlight by black carbon (BC) warms the atmosphere, which may be important for Arctic climate. The measurement of BC is complicated by the lack of a simple definition of BC and the absence of techniques that are uniquely sensitive to BC (e.g., Petzold et al., 2013). At the Global Atmosphere Watch baseline observatory in Alert, Nunavut ...
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