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RAP Surface CAPE Map Unavailable
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About This Map

CAPE, or Convective Available Potential Energy, is a measurement of the instability of an air mass at a given moment. Large CAPE values are a good indication that severe thunderstorms containing large hail, strong winds, and tornadoes are likely. On our weather maps, CAPE is given in joules per kilogram.

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Map Status


Model Run Hour
GFS 12Z 384
GFS-HR 12Z 384
NAM 18Z 051
RAP 19Z 021
ECMWF 12Z 240
GEFS 12Z 384
CMC 12Z 240
ECMEPS 12Z 240

Latest News

2019-01-21: Added anomaly maps.