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It comprises a spectral atmospheric model with a terrain-following vertical coordinate system coupled to a 4D-Var data assimilation system.In 1997 the IFS became the first operational forecasting system to use 4D-Var. [2] Both ECMWF and Météo-France use the IFS to make operational weather forecasts, but using a different configuration and resolution (the Météo-France configuration is ...
ECMWF aims to provide accurate medium-range global weather forecasts out to 15 days and seasonal forecasts out to 12 months. [11] Its products are provided to the national weather services of its member states and co-operating states as a complement to their national short-range and climatological activities, and those national states use ECMWF's products for their own national duties, in ...
Along with the NWS's Global Forecast System (GFS), which runs out to 16 days, the ECMWF's Integrated Forecast System (IFS), which runs out 10 days, the Naval Research Laboratory Navy Global Environmental Model (NAVGEM), which runs out eight days, the UK Met Office's Unified Model, which runs out to seven days, and Deutscher Wetterdienst's ICON ...
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Mar. 23—The National Weather Service has upgraded its often-maligned computer forecast model to better predict extreme weather events such as winter storms, thunderstorm downpours and hurricanes ...
The European Centre for Medium-Range Weather Forecasts model debuted on May 1, 1985. [25] The United Kingdom Met Office has been running their global model since the late 1980s, [26] adding a 3D-Var data assimilation scheme in mid-1999. [27] The Canadian Meteorological Centre has been running a global model since 1991. [28]
Despite the European model consistently forecasting 6 in (15 cm) of snow from the storm, the National Weather Service of New York City initially predicted just 1 in (2.5 cm). Not until the afternoon of the storm did they raise the forecast into the 2–5 in (5.1–12.7 cm) zone, which prompted a winter weather advisory to be issued. [4]
In its long range forecast, from Christmas eve to January 7, the Met Office confirmed that some sleet and snow was “likely at times”, mainly affecting high ground in northern parts of the UK.
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