Alert archive / South Carolina / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 201, NWS Greenville-Spartanburg, SC

June 12, 2009Greenville County, Spartanburg County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jun 12, 2009, 1:58 PM EDT for Greenville County, Spartanburg County, South Carolina. It was in force for 62 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 12, 2009, 1:58 PM EDT (17:58 UTC)
Expired: Jun 12, 2009, 3:00 PM EDT
In force: 62 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Greenville County, SC, Spartanburg County, SC

The radar

The Greer radar (KGSP), 5 km from the middle of the area, began a volume at 18:00 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.0 hours before the alert went out and 274 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: 1382 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.1

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 Jun 12, 1:41 PM EDT, 17 minutes earlier.

Area forecast discussion, Jun 12, 1:41 PM EDT, 17 minutes before

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Hazardous weather outlook, Jun 12, 5:08 AM EDT, 8 hours 50 minutes before

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In the hours before

Local storm report, Jun 12, 8:13 AM EDT, 5 hours 45 minutes before

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Local storm report, Jun 12, 9:09 AM EDT, 4 hours 49 minutes before

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Local storm report, Jun 12, 10:13 AM EDT, 3 hours 45 minutes before

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Local storm report, Jun 12, 12:10 PM EDT, 1 hour 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1210 PM EDT FRI JUN 12 2009

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

0448 PM     TSTM WND DMG     3 NW SMYRNA             35.07N 81.45W
06/11/2009                   CHEROKEE           SC   NWS EMPLOYEE

            TREES DOWN ALONG HIGHWAY 5 IN KINGS CREEK COMMUNITY.

&&

HG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 4:45 PM EDT	Severe Thunderstorm Warning	GSP	Mecklenburg, Union	44 min
Jun 12, 4:59 PM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Mecklenburg, Union	61 min
Jun 12, 3:38 PM EDT	Severe Thunderstorm Warning	GSP	Cherokee, Chester, Union, York	67 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.