Alert archive / Georgia / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 255, NWS Jacksonville, FL

August 25, 20094 counties in Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Aug 25, 2009, 2:56 PM EDT for 4 counties in Georgia. It was in force for 33 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: Aug 25, 2009, 2:56 PM EDT (18:56 UTC)
Expired: Aug 25, 2009, 3:29 PM EDT
In force: 33 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

Counties Atkinson County, GA, Brantley County, GA, Charlton County, GA, Ware County, GA

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 6.9 hours before the alert went out and 300 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: 2204 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 545 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 2:06 PM EDT	Special Weather Statement	JAX	Flagler	24 min
Aug 25, 2:27 PM EDT	Special Weather Statement	JAX	Marion	33 min
Aug 25, 2:33 PM EDT	Special Weather Statement	JAX	Putnam	42 min
Aug 25, 2:57 PM EDT	Special Weather Statement	JAX	Marion	33 min
Aug 25, 3:01 PM EDT	Special Weather Statement	JAX	Saint Johns	29 min
Aug 25, 3:25 PM EDT	Special Weather Statement	JAX	Clay	35 min
Aug 25, 3:35 PM EDT	Special Weather Statement	JAX	Clay	25 min
Aug 25, 3:42 PM EDT	Special Weather Statement	JAX	Marion	33 min
Aug 25, 3:44 PM EDT	Special Weather Statement	JAX	Marion	31 min
Aug 25, 3:53 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Bradford, Clay, Duval, Nassau, Union	52 min
Aug 25, 3:55 PM EDT	Severe Thunderstorm Warning	JAX	Marion	26 min
Aug 25, 4:03 PM EDT	Special Weather Statement	JAX	Baker	27 min
Aug 25, 4:13 PM EDT	Areal Flood Advisory	JAX	Marion	92 min
Aug 25, 4:15 PM EDT	Special Weather Statement	JAX	Marion	30 min
Aug 25, 4:27 PM EDT	Special Weather Statement	JAX	Baker	33 min
Aug 25, 4:29 PM EDT	Areal Flood Advisory	JAX	Clay	61 min
Aug 25, 4:59 PM EDT	Special Weather Statement	JAX	Baker	31 min
Aug 25, 5:00 PM EDT	Special Weather Statement	JAX	Gilchrist	30 min
Aug 25, 5:09 PM EDT	Special Weather Statement	JAX	Columbia	51 min
Aug 25, 5:25 PM EDT	Special Weather Statement	JAX	Alachua	50 min
Aug 25, 5:44 PM EDT	Special Weather Statement	JAX	Union	46 min
Aug 25, 6:04 PM EDT	Special Weather Statement	JAX	Gilchrist	41 min
Aug 25, 6:29 PM EDT	Special Weather Statement	JAX	Gilchrist	46 min
Aug 25, 2:03 PM EDT	Special Weather Statement	JAX	Charlton	27 min
Aug 25, 3:31 PM EDT	Special Weather Statement	JAX	Charlton	44 min
Aug 25, 4:19 PM EDT	Special Weather Statement	JAX	Charlton	41 min
Aug 25, 4:45 PM EDT	Special Weather Statement	JAX	Clinch	45 min
Aug 25, 5:07 PM EDT	Special Weather Statement	JAX	Atkinson	23 min
Aug 25, 6:17 PM EDT	Special Weather Statement	JAX	Clinch	28 min
Aug 25, 6:21 PM EDT	Special Weather Statement	JAX	Echols	24 min

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.