NCEP North American Model : AWIPS 215(U) grid over the continental United States - Quadruple Resolution. Model runs are made at 00Z, 06Z, 12Z, and 18Z, with analysis and forecasts every 3 hours out to 48 hours. Horizontal = 369 by 257 points, resolution 20.31 km, LambertConformal projection. Vertical = surface, height above ground, and 1000 to 30 hPa pressure levels.
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