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NAM 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 06Z 384
GFS-HR 06Z 384
NAM 06Z 084
RAP 10Z 021
ECMWF 00Z 240
GEFS 06Z 384
CMC 00Z 240
ECMEPS 00Z 240

Latest News

2019-01-21: Added anomaly maps.