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About This Map

Mean sea level pressure is the atmospheric pressure adjusted for altitude at a given moment. When weather reports mention surface pressure or barometric pressure, they are usually referring to mean sea level pressure. Mean sea level pressure anomaly is the departure of the mean sea level pressure from average. On our weather maps, mean sea level pressure is given in millibars or inches of mercury.

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Map Status


Model Run Hour
GFS 00Z 384
GFS-HR 00Z 384
NAM 00Z 084
RAP 05Z 011
ECMWF 00Z 024
GEFS 00Z 384
CMC 00Z 240
ECMEPS 12Z 240

Latest News

2019-01-21: Added anomaly maps.