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NAM 300mb Wind/Height Map Unavailable
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About This Map

Wind is the sustained wind speed and direction at a given level of the atmosphere at a given moment. Wind gust is the speed of wind gusts at a given moment. On our weather maps, wind speed and wind gust are given in knots or miles per hour. Geopotential height is the altitude at which the air is at a given pressure at a given moment. When meteorologists mention "upper-level low pressure systems", they are referring to low geopotential heights, usually at the 500mb level. Low geopotential heights are often associated with storm systems and cold air. Geopotential height anomaly is the departure of the geopotential height from average at a given level. On our weather maps, geopotential height and geopotential height anomaly are given in decameters.

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Map Status


Model Run Hour
GFS 06Z 384
GFS-HR 06Z 384
NAM 12Z 051
RAP 13Z 021
ECMWF 00Z 240
GEFS 06Z 384
CMC 00Z 240
ECMEPS 00Z 240

Latest News

2019-01-21: Added anomaly maps.