Alert archive / South Carolina / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 91, NWS Wilmington, NC

June 21, 2008Marlboro County, South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at Jun 21, 2008, 4:30 PM EDT for Marlboro County, South Carolina. It was in force for 45 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 21, 2008, 4:30 PM EDT (20:30 UTC)
Expired: Jun 21, 2008, 5:15 PM EDT
In force: 45 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon

County Marlboro County, SC

The radar

The Wilmington radar (KLTX), 134 km from the middle of the area, began a volume at 20:30 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.5 hours before the alert went out and 166 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: 847 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 786 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

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 Wilmington, NC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 21, 3:48 PM EDT, 42 minutes earlier.

Area forecast discussion, Jun 21, 3:48 PM EDT, 42 minutes before

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Hazardous weather outlook, Jun 21, 3:41 AM EDT, 12 hours 49 minutes before

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In the hours before

Local storm report, Jun 21, 10:46 AM EDT, 5 hours 44 minutes before

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Special weather statement, Jun 21, 2:49 PM EDT, 1 hour 41 minutes before

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Special weather statement, Jun 21, 4:25 PM EDT, 5 minutes before

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The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 21, 9:33 AM EDT	Special Marine Warning	ILM		57 min
Jun 21, 10:13 AM EDT	Special Marine Warning	ILM		2 hr
Jun 21, 11:22 AM EDT	Special Marine Warning	ILM		38 min
Jun 21, 11:38 AM EDT	Special Marine Warning	ILM		67 min
Jun 21, 1:42 PM EDT	Special Marine Warning	ILM		63 min
Jun 21, 2:04 PM EDT	Severe Thunderstorm Warning	ILM	Georgetown	41 min
Jun 21, 2:51 PM EDT	Special Marine Warning	ILM		54 min
Jun 21, 3:45 PM EDT	Special Marine Warning	ILM		30 min
Jun 21, 8:35 AM EDT	Severe Thunderstorm Warning	ILM	Brunswick, Columbus	40 min
Jun 21, 9:19 AM EDT	Severe Thunderstorm Warning	ILM	Brunswick, New Hanover	41 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2008 Every severe thunderstorm warning in 2008

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.