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RAP 975mb Geopotential Height Map Unavailable
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About This Map

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 18Z 384
GFS-HR 18Z 384
NAM 00Z 012
RAP 01Z 021
ECMWF 12Z 240
GEFS 18Z 384
CMC 12Z 021
ECMEPS 12Z 240

Latest News

2019-01-21: Added anomaly maps.