The National Blend of Global Models was developed to utilize the best available science and provide a consistent National Weather Service forecast product across the U.S. This lesson describes the background and motivation for the National Blend and includes comparisons of ... Read more »
This lesson introduces users to the five different guidance products that will be included in Version 1.0 of the U.S. National Weather Service (NWS) National Blend of global Models (NBM). The primary audience for this lesson includes forecasters and users of NWS forecast ... Read more »
This lesson introduces users to the statistics used in generating the various weather element forecasts included in Version 1.0 of the U.S. National Weather Service (NWS) National Blend of global Models (NBM). This Level 3 lesson is intended for forecasters and users of NWS ... Read more »
This lesson introduces learners to the methods used in verifying the various weather element forecasts included in Version 1.0 of the U.S. National Weather Service (NWS) National Blend of global Models (NBM). This Level 2 lesson is intended for forecasters and users of NWS ... Read more »
This lesson introduces users to the statistics used in generating the various weather element forecasts included in version 2 and 3 of the U.S. National Weather Service (NWS) National Blend of Global Models (NBM). This Level 3 lesson is intended for forecasters and users of ... Read more »
The National Weather Service National Blend of Models (NBM) was updated to version 3.0 on 27 July 2017. Changes include: Eight new components for the contiguous U.S. (CONUS) and Alaska, including four deterministic models, two ensemble systems, and two post-processed ... Read more »
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Intended for U.S. National Weather Service forecasters, this short video describes changes to the NWS National Blend of Models when it was updated to v3.1. These changes include: More global, mesoscale, and ensemble components; Increased spatial resolution of some ... Read more »
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The U.S. National Weather Service (NWS) National Blend of Models (NBM) is scheduled to be upgraded to version 3.2 in November 2019. It includes the first probabilistic blended guidance for temperature, precipitation, snow, and ice. There are more blended forecast products ... Read more »
This lesson addresses new and improved weather elements in version 3.2 of the National Blend of Models. The weather elements are grouped into the following functional areas: Aviation Precipitation Fire Weather Marine Tropical ... Read more »
Winter weather is one of the more challenging aspects of operational weather forecasting. Factors affecting the impact of winter storms include precipitation type, timing of precipitation onset and precipitation type changeovers, winds, visibility, temperature, and the ... Read more »
The National Blend of Models version 3.2 (NBM v3.2) is due to be released operationally in November 2019. The latest version improves blending methods for wind speed and direction, probability of precipitation (PoP), quantitative precipitation forecasts (QPF), cloud base ... Read more »