Light winds and high moisture led to conditions favorable for waterspouts along a line of cumulus clouds over coastal waters.
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The episode as NWS CHS wrote it up.
Light winds and high moisture led to conditions favorable for waterspouts along a line of cumulus clouds over coastal waters.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Charleston, SC wrote its last area forecast discussion before the first event at Aug 10, 9:13 AM EST, 1 hour 32 minutes earlier.
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</html>The Charleston,SC radar (KCLX), 92 km away, was scanning. The volume nearest the first event began at 15:46 UTC.
1 waterspout. Local standard time, as filed.
The public reported as many as 10 funnel clouds and 5 waterspouts approximately 12 nautical miles from the coast of Hilton Head Island, SC.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Atlantic Coastal Waters in 2021Every state in 2021This day in weather history
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 979048.