Alert archive / South Carolina / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 94, NWS Charleston, SC

June 27, 2013Allendale County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Jun 27, 2013, 9:22 PM EDT for Allendale County, South Carolina. It was in force for 38 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: Jun 27, 2013, 9:22 PM EDT (01:22 UTC)
Expired: Jun 27, 2013, 10:00 PM EDT
In force: 38 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon

County Allendale County, SC

The radar

The Charleston,SC radar (KCLX), 47 km from the middle of the area, began a volume at 01:25 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.4 hours before the alert went out and 295 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: 3023 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 896 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.2

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 Jun 27, 7:46 PM EDT, 1 hour 36 minutes earlier.

Area forecast discussion, Jun 27, 7:46 PM EDT, 1 hour 36 minutes before

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Hazardous weather outlook, Jun 27, 9:17 PM EDT, 5 minutes before

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In the hours before

Local storm report, Jun 27, 7:31 PM EDT, 1 hour 51 minutes before

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Local storm report, Jun 27, 7:34 PM EDT, 1 hour 48 minutes before

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Local storm report, Jun 27, 7:39 PM EDT, 1 hour 43 minutes before

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Local storm report, Jun 27, 7:42 PM EDT, 1 hour 40 minutes before

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Local storm report, Jun 27, 8:36 PM EDT, 46 minutes before

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Special weather statement, Jun 27, 9:02 PM EDT, 20 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
Jun 27, 9:02 PM EDT	Special Weather Statement	CHS	Allendale	28 min
Jun 27, 9:54 PM EDT	Special Weather Statement	CHS	Hampton	36 min
Jun 28, 4:00 AM EDT	Small Craft Advisory	CHS		4 days
Jun 28, 6:38 AM EDT	Heat Advisory	CHS	Allendale, Colleton, Hampton	11 hr
Jun 28, 11:33 AM EDT	Special Marine Warning	CHS		87 min
Jun 28, 4:06 PM EDT	Special Weather Statement	CHS	Liberty	24 min
Jun 28, 4:13 PM EDT	Severe Thunderstorm Warning	CHS	Liberty, Long, Tattnall	62 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2013 Every severe thunderstorm warning in 2013

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.