Alert archive / Georgia / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 112, NWS Greenville-Spartanburg, SC

May 15, 2009Habersham County, Stephens County, Georgia

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at May 15, 2009, 8:45 PM EDT for Habersham County, Stephens County, Georgia. It was in force for 21 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: May 15, 2009, 8:45 PM EDT (00:45 UTC)
Expired: May 15, 2009, 9:06 PM EDT
In force: 21 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Habersham County, GA, Stephens County, GA

The radar

The Greer radar (KGSP), 114 km from the middle of the area, began a volume at 00:46 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 00:00Z, 0.8 hours before the alert went out and 169 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: 761 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1535 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -44 m²/s²
0-3 km storm-relative helicity: -28 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 May 15, 7:50 PM EDT, 55 minutes earlier.

Area forecast discussion, May 15, 7:50 PM EDT, 55 minutes before

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Hazardous weather outlook, May 15, 4:10 PM EDT, 4 hours 35 minutes before

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In the hours before

Special weather statement, May 15, 6:53 PM EDT, 1 hour 52 minutes before

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Special weather statement, May 15, 7:12 PM EDT, 1 hour 33 minutes before

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Special weather statement, May 15, 7:34 PM EDT, 1 hour 11 minutes before

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Special weather statement, May 15, 7:53 PM EDT, 52 minutes before

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Special weather statement, May 15, 8:30 PM EDT, 15 minutes before

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Special weather statement, May 15, 8:42 PM EDT, 3 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
May 16, 6:25 PM EDT	Areal Flood Advisory	GSP	Avery, Caldwell	4 hr
May 16, 6:40 PM EDT	Severe Thunderstorm Warning	GSP	Alexander, Caldwell	35 min
May 16, 6:53 PM EDT	Areal Flood Advisory	GSP	Henderson	3 hr
May 16, 7:06 PM EDT	Severe Thunderstorm Warning	GSP	Jackson, Macon, Swain	39 min
May 16, 7:19 PM EDT	Flash Flood Warning	GSP	Avery, Caldwell	6 hr
May 16, 7:58 PM EDT	Areal Flood Advisory	GSP	Buncombe, Madison	4 hr
May 16, 1:15 PM EDT	Areal Flood Advisory	GSP	Chester, York	3 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 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.