Alert archive / South Carolina / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 77, NWS Charleston, SC

August 18, 2024Berkeley County, Dorchester County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Aug 18, 2024, 11:30 PM EDT for Berkeley County, Dorchester County, South Carolina. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 18, 2024, 11:30 PM EDT (03:30 UTC)
Expired: Aug 19, 2024, 12:20 AM EDT
In force: 50 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Berkeley County, SC, Dorchester County, SC

The radar

The Charleston,SC radar (KCLX), 97 km from the middle of the area, began a volume at 03:29 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 3.5 hours before the alert went out and 327 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1042 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1586 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Aug 18, 10:42 PM EDT, 48 minutes earlier.

Area forecast discussion, Aug 18, 10:42 PM EDT, 48 minutes before

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Hazardous weather outlook, Aug 18, 11:12 PM EDT, 18 minutes before

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In the hours before

Special weather statement, Aug 18, 9:42 PM EDT, 1 hour 48 minutes before

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Special weather statement, Aug 18, 10:02 PM EDT, 1 hour 28 minutes before

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Special weather statement, Aug 18, 10:43 PM EDT, 47 minutes before

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Special weather statement, Aug 18, 11:02 PM EDT, 28 minutes before

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Local storm report, Aug 18, 11:08 PM EDT, 22 minutes before

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Special weather statement, Aug 18, 11:14 PM EDT, 16 minutes before

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The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 18, 8:22 PM EDT	Special Weather Statement	CHS	Bulloch, Candler	38 min
Aug 18, 8:28 PM EDT	Severe Thunderstorm Warning	CHS	Bryan, Bulloch, Candler, Effingham, Evans, Liberty and 2 more	62 min
Aug 18, 9:37 PM EDT	Special Weather Statement	CHS	Long	38 min
Aug 18, 10:02 PM EDT	Special Weather Statement	CHS	Bryan, Chatham, Liberty	43 min
Aug 18, 10:18 PM EDT	Special Marine Warning	CHS		87 min
Aug 18, 10:43 PM EDT	Special Weather Statement	CHS	Chatham	32 min
Aug 18, 11:08 PM EDT	Special Marine Warning	CHS		2 hr
Aug 18, 11:14 PM EDT	Special Weather Statement	CHS	Liberty, Long, McIntosh	61 min
Aug 18, 11:36 PM EDT	Special Marine Warning	CHS		56 min
Aug 19, 6:47 PM EDT	Special Marine Warning	CHS		118 min
Aug 18, 9:42 PM EDT	Special Weather Statement	CHS	Berkeley	33 min
Aug 18, 11:02 PM EDT	Special Weather Statement	CHS	Dorchester	43 min
Aug 18, 11:57 PM EDT	Special Weather Statement	CHS	Berkeley	63 min
Aug 19, 12:14 AM EDT	Severe Thunderstorm Warning	CHS	Berkeley	46 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2024 Every severe thunderstorm warning in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.