Alert archive / South Carolina / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 121, NWS Charleston, SC

June 10, 2009Berkeley County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Jun 10, 2009, 11:50 PM EDT for Berkeley County, South Carolina. It was in force for 25 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 10, 2009, 11:50 PM EDT (03:50 UTC)
Expired: Jun 11, 2009, 12:15 AM EDT
In force: 25 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon

County Berkeley County, SC

The radar

The Charleston,SC radar (KCLX), 118 km from the middle of the area, began a volume at 03:52 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 00:00Z, 3.8 hours before the alert went out and 320 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: 1336 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1080 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.3

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 10, 10:30 PM EDT, 1 hour 20 minutes earlier.

Area forecast discussion, Jun 10, 10:30 PM EDT, 1 hour 20 minutes before

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Hazardous weather outlook, Jun 10, 8:54 PM EDT, 2 hours 56 minutes before

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In the hours before

Special weather statement, Jun 10, 9:49 PM EDT, 2 hours 1 minute before

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Special weather statement, Jun 10, 11:20 PM EDT, 30 minutes before

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Local storm report, Jun 10, 11:28 PM EDT, 22 minutes before

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Local storm report, Jun 10, 11:45 PM EDT, 5 minutes before

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Special weather statement, Jun 10, 11:46 PM EDT, 4 minutes before

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Local storm report, Jun 10, 11:49 PM EDT, 1 minute 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 11, 6:04 PM EDT	Severe Thunderstorm Warning	CHS	Jenkins	41 min
Jun 11, 6:16 PM EDT	Severe Thunderstorm Warning	CHS	Screven	44 min
Jun 11, 6:20 PM EDT	Severe Thunderstorm Warning	CHS	Candler, Tattnall	55 min
Jun 11, 6:26 PM EDT	Severe Thunderstorm Warning	CHS	Screven	49 min
Jun 11, 6:58 PM EDT	Severe Thunderstorm Warning	CHS	Effingham	47 min
Jun 11, 7:06 PM EDT	Severe Thunderstorm Warning	CHS	Bryan, Bulloch, Candler, Effingham, Evans	54 min
Jun 11, 7:53 PM EDT	Severe Thunderstorm Warning	CHS	Bryan, Bulloch, Effingham, Liberty, Screven	52 min
Jun 10, 8:52 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	53 min
Jun 10, 10:12 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	25 min
Jun 10, 11:26 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	49 min
Jun 10, 11:54 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	51 min
Jun 11, 6:30 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	23 min
Jun 11, 7:02 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Colleton, Dorchester	43 min
Jun 11, 7:41 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston, Dorchester	49 min
Jun 11, 7:43 PM EDT	Severe Thunderstorm Warning	CHS	Colleton, Dorchester	32 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2009 Every severe thunderstorm warning in 2009

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.