TS Frequency Descriptors MET
There are four descriptors which apply to "how common" cumulonimbus clouds are in the sky. These are, with their meanings:
- ISOL (isolated) - individual CBCB —Cumulonimbuss
- OCNL (occasional - "well separated" CBCB —Cumulonimbuss
- FRQ (frequent) - "barely or not separated" CBCB —Cumulonimbuss
- EMBDEMBD —Embedded (embedded) - embedded (they are inside other clouds) CBCB —Cumulonimbuss
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How are individual cumulonimbus clouds described on surface weather charts?