Alert archive / South Carolina / Flash Flood Warnings in 2024

Flash Flood Warning 14, NWS Charleston, SC

August 7, 2024Colleton County, Dorchester County, South Carolina

NWS Charleston, SC issued this flash flood warning at Aug 7, 2024, 3:47 PM EDT for Colleton County, Dorchester County, South Carolina. It was in force for 6 hr. 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 7, 2024, 3:47 PM EDT (19:47 UTC)
Expired: Aug 7, 2024, 9:45 PM EDT
In force: 6 hr
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Colleton County, SC, Dorchester County, SC

The radar

The Charleston,SC radar (KCLX), 59 km from the middle of the area, began a volume at 19:49 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

Charleston AFB, SC (KCHS), launched 12:00Z, 7.8 hours before the alert went out and 50 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: 110 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 544 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Aug 6, 6:02 PM EDT, 21 hours 45 minutes earlier.

Area forecast discussion, Aug 6, 6:02 PM EDT, 21 hours 45 minutes before

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Hazardous weather outlook, Aug 6, 5:15 PM EDT, 22 hours 32 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 6, 8:15 PM EDT	Areal Flood Warning	CHS	Jenkins, Screven	14 hr
Aug 6, 10:11 PM EDT	Areal Flood Warning	CHS	Bryan, Bulloch, Chatham, Effingham, Evans, Liberty and 2 more	12 hr
Aug 6, 10:24 PM EDT	Areal Flood Warning	CHS	Screven	12 hr
Aug 6, 10:35 PM EDT	Areal Flood Advisory	CHS	Long, Tattnall	5 hr
Aug 7, 5:56 AM EDT	River Flood Warning	CHS	Bulloch, Jenkins, Screven	58 hr
Aug 7, 9:44 AM EDT	Areal Flood Warning	CHS	Bulloch, Candler, Effingham, Jenkins, Screven	50 hr
Aug 7, 9:45 AM EDT	Areal Flood Warning	CHS	Bryan, Chatham, Evans, Liberty	23 hr
Aug 7, 12:18 PM EDT	Flash Flood Warning Considerable damage threat	CHS	Bulloch	51 hr
Aug 7, 4:54 PM EDT	Small Craft Advisory	CHS		45 hr
Aug 6, 9:48 PM EDT	Areal Flood Warning	CHS	Berkeley, Charleston	12 hr
Aug 6, 10:52 PM EDT	Areal Flood Warning	CHS	Beaufort, Berkeley, Charleston, Colleton, Dorchester	11 hr
Aug 7, 9:41 AM EDT	Areal Flood Warning	CHS	Berkeley, Charleston, Colleton, Dorchester	5 days
Aug 7, 10:01 AM EDT	Areal Flood Warning	CHS	Allendale, Beaufort, Hampton, Jasper	50 hr

Nearby

Flash Flood Warnings in South Carolina, 2024 Every flash flood 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.