The combination of deep moisture, modest mixed-layer convective available potential energy and forcing associated with shortwave energy aloft and a nearly stationary front led to conditions favorable for heavy rainfall and localized flash flooding.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CHS wrote it up.
The combination of deep moisture, modest mixed-layer convective available potential energy and forcing associated with shortwave energy aloft and a nearly stationary front led to conditions favorable for heavy rainfall and localized flash flooding.
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 18, 6:54 PM EST, 46 minutes earlier.
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</html>The Charleston,SC radar (KCLX), 39 km away, was scanning. The volume nearest the first event began at 00:38 UTC.
2 flash flood. Local standard time, as filed.
The Beaufort County 911 Call Center reported water in a residence near Taft Street.
The Beaufort County 911 Call Center reported water in a residence on Stuart Towne Lane.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Carolina in 2022Every state in 2022This day in weather historyWarnings in South Carolina, August 2022
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 2026-10-01. Each event’s entry at NCEI: 1041039, 1052501.