Alert archive / Georgia / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 277, NWS Jacksonville, FL

December 9, 20094 counties in Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Dec 9, 2009, 2:35 PM EST for 4 counties in Georgia. It was in force for 40 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
Dec 9, 2009, 2:35 PM EST (19:35 UTC)
Expired
Dec 9, 2009, 3:15 PM EST
In force
40 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Brantley County, GA, Charlton County, GA, Clinch County, GA, Ware County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.6 hours before the alert went out and 201 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-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 12:00Z on 2009-12-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 694 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2009-12-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 219 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
694 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
522 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
219 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
1.1
Supercell composite
6.5

Open this sounding in Storm Lab

The office that day

Everything else NWS Jacksonville, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 9, 4:40 AM ESTLake Wind AdvisoryJAXBaker, Bradford, Flagler, Nassau, Union13 hr
Dec 9, 2:57 PM ESTSpecial Weather StatementJAXHamilton33 min
Dec 9, 3:34 PM ESTSpecial Weather StatementJAXHamilton41 min
Dec 9, 4:01 PM ESTSpecial Weather StatementJAXNassau44 min
Dec 9, 4:07 PM ESTSpecial Weather StatementJAXHamilton38 min
Dec 9, 4:16 PM ESTSpecial Marine WarningJAX119 min
Dec 9, 4:28 PM ESTSpecial Weather StatementJAXSuwannee17 min
Dec 9, 8:35 AM ESTSpecial Weather StatementJAXJeff Davis40 min
Dec 9, 9:07 AM ESTSpecial Weather StatementJAXAppling38 min
Dec 9, 12:29 PM ESTSpecial Weather StatementJAXBacon, Coffee31 min
Dec 9, 1:01 PM ESTSpecial Weather StatementJAXBacon44 min
Dec 9, 1:02 PM ESTSpecial Weather StatementJAXAppling43 min
Dec 9, 1:15 PM ESTSevere Thunderstorm WarningJAXBacon, Coffee, Pierce, Ware45 min
Dec 9, 1:42 PM ESTSevere Thunderstorm WarningJAXAppling, Bacon, Pierce, Wayne48 min
Dec 9, 2:03 PM ESTSpecial Weather StatementJAXClinch, Echols, Ware42 min
Dec 9, 3:01 PM ESTSpecial Weather StatementJAXEchols44 min
Dec 9, 3:15 PM ESTSpecial Weather StatementJAXCamden, Charlton45 min
Dec 9, 4:46 PM ESTSpecial Weather StatementJAXCamden44 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2009Every 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.