Alert archive / South Carolina / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 251, NWS Charleston, SC

July 11, 2008Beaufort County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Jul 11, 2008, 5:40 PM EDT for Beaufort 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: Jul 11, 2008, 5:40 PM EDT (21:40 UTC)
Expired: Jul 11, 2008, 6:30 PM EDT
In force: 50 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon

County Beaufort County, SC

The radar

The Charleston,SC radar (KCLX), 47 km from the middle of the area, began a volume at 21:43 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, 9.7 hours before the alert went out and 89 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: 726 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 881 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: -14 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 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 Jul 11, 3:33 PM EDT, 2 hours 7 minutes earlier.

Area forecast discussion, Jul 11, 3:33 PM EDT, 2 hours 7 minutes before

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Hazardous weather outlook, Jul 11, 4:00 PM EDT, 1 hour 40 minutes before

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In the hours before

Special weather statement, Jul 11, 3:23 PM EDT, 2 hours 17 minutes before

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Special weather statement, Jul 11, 3:25 PM EDT, 2 hours 15 minutes before

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Special weather statement, Jul 11, 4:09 PM EDT, 1 hour 31 minutes before

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Special weather statement, Jul 11, 4:47 PM EDT, 53 minutes before

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Special weather statement, Jul 11, 5:06 PM EDT, 34 minutes before

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Special weather statement, Jul 11, 5:29 PM EDT, 11 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
Jul 10, 8:41 PM EDT	Special Marine Warning	CHS		2 hr
Jul 11, 3:25 PM EDT	Special Marine Warning	CHS		95 min
Jul 11, 4:06 PM EDT	Special Marine Warning	CHS		103 min
Jul 11, 4:18 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston, Dorchester	89 min
Jul 11, 4:41 PM EDT	Special Marine Warning	CHS		2 hr
Jul 11, 5:13 PM EDT	Special Marine Warning	CHS		92 min
Jul 11, 5:19 PM EDT	Special Marine Warning	CHS		116 min
Jul 11, 5:59 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Jasper	61 min
Jul 11, 6:42 PM EDT	Special Marine Warning	CHS		96 min
Jul 11, 7:08 PM EDT	Special Marine Warning	CHS		94 min
Jul 11, 7:25 PM EDT	Severe Thunderstorm Warning	CHS	Hampton, Jasper	65 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.