Weather Dictionary / Glossary of Terms

Clear Slot


   Weather TermDescription / Definition
   Clear Slot With respect to severe thunderstorms, a local region of clearing skies or reduced cloud cover, indicating an intrusion of drier air; often seen as a bright area with higher cloud bases on the west or southwest side of a wall cloud. A clear slot is believed to be a visual indication of a rear flank downdraft.


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Data courtesy of NOAA - National Oceanic and Atmospheric Administration