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![GFS Surface CAPE Map Unavailable](/GFS/2024061806/USA_CAPE_sfc_111.gif)
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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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