A strong upper level disturbance drove a squall line or Mesoscale Convective System (MCS) through southern South Carolina in the early morning hours. Another MCS pushed into the region and collided with the sea breeze in the evening, and resulted in scattered thunderstorm development across the area once again.
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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.
A strong upper level disturbance drove a squall line or Mesoscale Convective System (MCS) through southern South Carolina in the early morning hours. Another MCS pushed into the region and collided with the sea breeze in the evening, and resulted in scattered thunderstorm development across the area once again.
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 Jun 18, 3:44 AM EST, 47 minutes earlier.
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</html>The Charleston,SC radar (KCLX), 42 km away, was scanning. The volume nearest the first event began at 09:31 UTC.
4 thunderstorm wind. Local standard time, as filed.
Law Enforcement reported a tree down on Ladys Island, South Carolina.
Broadcast Media relayed a public report of several large tree limbs down in a residential yard off of Highway 165, 1 mile north of Delemar Crossroads, South Carolina.
Law Enforcement reported a tree down on Coosaw Island, South Carolina.
The public reported numerous large tree limbs in and near Appleton, South Carolina.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Carolina in 2009Every state in 2009This day in weather historyWarnings in South Carolina, June 2009
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 2026-09-24. Each event’s entry at NCEI: 184795, 184796, 184797, 184800.