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  2. Rapid Refresh (weather prediction) - Wikipedia

    en.wikipedia.org/wiki/Rapid_Refresh_(weather...

    The model is designed to provide short-range hourly weather forecasts for North America. The Rapid Refresh was officially made operational on 1 May 2012, replacing the Rapid Update Cycle (RUC). The model also serves as the boundary conditions for the higher-resolution High Resolution Rapid Refresh ( HRRR ) model, that uses a 3 km (1.9 mi) grid ...

  3. Unified Model - Wikipedia

    en.wikipedia.org/wiki/Unified_model

    Run out to 36 hours (this replaced the UK 4 km model in 2011). The forecast is run every 3 hours using boundary conditions from the 25-km global model. [13] The resolution is 1.5 km over the UK, and 4 km over surrounding areas. [14] [15] The UKV model is kept close to observations using 3D-Var data assimilation every 3 hours.

  4. Numerical weather prediction - Wikipedia

    en.wikipedia.org/wiki/Numerical_weather_prediction

    Weather reconnaissance aircraft, such as this WP-3D Orion, provide data that is then used in numerical weather forecasts.. The atmosphere is a fluid.As such, the idea of numerical weather prediction is to sample the state of the fluid at a given time and use the equations of fluid dynamics and thermodynamics to estimate the state of the fluid at some time in the future.

  5. Station model - Wikipedia

    en.wikipedia.org/wiki/Station_model

    On the top right corner of the model for a surface weather map is the pressure, showing the last two integer digits of the pressure in millibars, or hectopascals, along with the first decimal. For instance, if the pressure at a certain location is 999.7 hPa, the pressure portion of the station model will read 997.

  6. Atmospheric model - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_model

    A 96-hour forecast of 850 mbar geopotential height and temperature from the Global Forecast System. In atmospheric science, an atmospheric model is a mathematical model constructed around the full set of primitive, dynamical equations which govern atmospheric motions.

  7. History of numerical weather prediction - Wikipedia

    en.wikipedia.org/wiki/History_of_numerical...

    Operational numerical weather prediction in the United States began in 1955 under the Joint Numerical Weather Prediction Unit (JNWPU), a joint project by the U.S. Air Force, Navy, and Weather Bureau. [12] The JNWPU model was originally a three-layer barotropic model, also developed by Charney. [13]

  8. File:LD 36.pdf - Wikipedia

    en.wikipedia.org/wiki/File:LD_36.pdf

    Original file (1,275 × 1,650 pixels, file size: 1.19 MB, MIME type: application/pdf) This is a file from the Wikimedia Commons . Information from its description page there is shown below.

  9. North American Ensemble Forecast System - Wikipedia

    en.wikipedia.org/wiki/North_American_Ensemble...

    The North American Ensemble Forecast System (NAEFS) is a joint project involving the Meteorological Service of Canada (MSC) in Canada, the National Weather Service (NWS) in the United States, and the National Meteorological Service of Mexico (NMSM) in Mexico providing numerical weather prediction ensemble guidance for the 1- to 16-day forecast period. [1]

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