Alert archive / South Carolina / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 8, NWS Greenville-Spartanburg, SC

February 11, 20096 counties in South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Feb 11, 2009, 7:28 PM EST for 6 counties in South Carolina. It was in force for 47 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: Feb 11, 2009, 7:28 PM EST (00:28 UTC)
Expired: Feb 11, 2009, 8:15 PM EST
In force: 47 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Cherokee County, SC, Chester County, SC, Laurens County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 58 km from the middle of the area, began a volume at 00:28 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 11, 4:08 PM EST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.5 hours before the alert went out and 209 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1308 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 327 m²/s²
0-3 km storm-relative helicity: 467 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 Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 11, 6:42 PM EST, 46 minutes earlier.

Area forecast discussion, Feb 11, 6:42 PM EST, 46 minutes before

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Hazardous weather outlook, Feb 11, 7:19 PM EST, 9 minutes before

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In the hours before

Local storm report, Feb 11, 5:33 PM EST, 1 hour 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
533 PM EST WED FEB 11 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0515 PM     TSTM WND DMG     ROBBINSVILLE            35.32N 83.81W
02/11/2009                   GRAHAM             NC   COUNTY OFFICIAL

            2 TREES REPORTED DOWN BY DOT ON TALLULAH AND OLD TALLULAH
            ROADS IN ROBBINSVILLE.

&&

JPT

Local storm report, Feb 11, 6:11 PM EST, 1 hour 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
611 PM EST WED FEB 11 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0540 PM     TSTM WND GST     3 NW SYLVA              35.41N 83.26W
02/11/2009  E60 MPH          JACKSON            NC   TRAINED SPOTTER

            ESTIMATED WIND GUST TO 60 MPH WITH PASSAGE OF SQUALL LINE

&&

LGABRIC

Local storm report, Feb 11, 6:34 PM EST, 54 minutes before

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Local storm report, Feb 11, 6:40 PM EST, 48 minutes before

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Special weather statement, Feb 11, 6:48 PM EST, 40 minutes before

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Local storm report, Feb 11, 6:57 PM EST, 31 minutes before

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The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 11, 7:42 PM EST	Severe Thunderstorm Warning	GSP	Cleveland, Gaston, Lincoln, Rutherford	63 min
Feb 11, 8:33 PM EST	Severe Thunderstorm Warning	GSP	Cabarrus, Mecklenburg, Union	57 min
Feb 11, 10:21 PM EST	Lake Wind Advisory	GSP	Alexander, Burke, Cabarrus, Caldwell, Catawba, Cleveland and 10 more	2 hr
Feb 12, 3:09 AM EST	Wind Advisory	GSP	Alexander, Buncombe, Burke, Caldwell, Graham, Haywood and 9 more	9 hr
Feb 12, 6:00 AM EST	Red Flag Warning	GSP	Alexander, Burke, Cabarrus, Caldwell, Catawba, Cleveland and 10 more	15 hr
Feb 12, 5:55 PM EST	Wind Advisory	GSP	Avery, Burke, Caldwell, McDowell, Mitchell, Yancey	12 hr
Feb 11, 7:07 PM EST	Severe Thunderstorm Warning	GSP	Anderson, Greenville, Pickens	38 min
Feb 11, 8:15 PM EST	Severe Thunderstorm Warning	GSP	Cherokee, Chester, Union, York	35 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.