Alert archive / South Carolina / Special Weather Statements in 2011

Special Weather Statement, NWS Charleston, SC

September 30, 2011Georgetown County, South Carolina

NWS Charleston, SC issued this special weather statement at Sep 30, 2011, 8:33 PM EDT for Georgetown County, South Carolina. It was in force for 12 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 30, 2011, 8:33 PM EDT (00:33 UTC)
Expired: Sep 30, 2011, 8:45 PM EDT
In force: 12 min
Issued by: NWS Charleston, SC

County Georgetown County, SC

The radar

The Wilmington radar (KLTX), 133 km from the middle of the area, began a volume at 00:35 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

Newport, NC (KMHX), launched 00:00Z, 0.6 hours before the alert went out and 297 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: 420 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 1382 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Sep 30, 7:57 PM EDT, 36 minutes earlier.

Area forecast discussion, Sep 30, 7:57 PM EDT, 36 minutes before

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Hazardous weather outlook, Sep 30, 4:00 AM EDT, 16 hours 33 minutes before

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In the hours before

Special weather statement, Sep 30, 4:21 PM EDT, 4 hours 12 minutes before

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Special weather statement, Sep 30, 6:14 PM EDT, 2 hours 19 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
Sep 30, 8:31 PM EDT	Special Marine Warning	CHS		44 min
Sep 30, 8:05 PM EDT	Special Weather Statement	CHS	Georgetown	25 min

Nearby

Special Weather Statements in South Carolina, 2011 Every special weather statement in 2011

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.