Thread: Good day to hang out the washing
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Old April 15th 04, 11:02 PM posted to uk.sci.weather
Jon O Rourke Jon O Rourke is offline
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First recorded activity by Weather-Banter: Jul 2003
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Default Good day to hang out the washing
"TudorHgh" wrote in message


Thanks, Howard. I left a little bit out, actually. CAVOK means "cloud
AND visibility OK" which means vis greater than 10 km as well as no cloud below
5000 ft. In practice it often means no cloud at all - one just has to guess.
If the vis is below 10 km and the sky clear then the term SKC is used.
Snip

Furthermore, continental METARs and UK TAFs use NSC (Nil Significant
Cloud) if the only cloud is 5000FT or above and not CB - assuming CAVOK
conditions don't apply.

Jon.


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