Alert archive / Georgia / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 241, NWS Jacksonville, FL

August 12, 2009Coffee County, Jeff Davis County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Aug 12, 2009, 6:05 PM EDT for Coffee County, Jeff Davis County, 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: Aug 12, 2009, 6:05 PM EDT (22:05 UTC)
Expired: Aug 12, 2009, 6:45 PM EDT
In force: 40 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

Counties Coffee County, GA, Jeff Davis County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 10.1 hours before the alert went out and 205 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: 1419 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1090 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: -2 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 12, 1:11 PM EDT	Special Weather Statement	JAX	Marion	34 min
Aug 12, 1:25 PM EDT	Special Weather Statement	JAX	Marion	35 min
Aug 12, 1:36 PM EDT	Special Weather Statement	JAX	Putnam	24 min
Aug 12, 1:52 PM EDT	Special Weather Statement	JAX	Marion	23 min
Aug 12, 2:01 PM EDT	Special Weather Statement	JAX	Marion	29 min
Aug 12, 2:12 PM EDT	Special Weather Statement	JAX	Marion	33 min
Aug 12, 2:23 PM EDT	Special Weather Statement	JAX	Alachua	37 min
Aug 12, 2:28 PM EDT	Special Weather Statement	JAX	Marion	32 min
Aug 12, 2:38 PM EDT	Special Weather Statement	JAX	Marion	37 min
Aug 12, 2:49 PM EDT	Special Weather Statement	JAX	Putnam	26 min
Aug 12, 3:19 PM EDT	Special Weather Statement	JAX	Putnam	41 min
Aug 12, 3:37 PM EDT	Special Weather Statement	JAX	Alachua	38 min
Aug 12, 3:44 PM EDT	Special Weather Statement	JAX	Clay	31 min
Aug 12, 4:13 PM EDT	Special Weather Statement	JAX	Flagler	32 min
Aug 12, 4:50 PM EDT	Special Weather Statement	JAX	Flagler	25 min
Aug 12, 5:00 PM EDT	Special Weather Statement	JAX	Duval	45 min
Aug 12, 6:44 PM EDT	Special Marine Warning	JAX		91 min
Aug 11, 9:27 PM EDT	Special Weather Statement	JAX	Wayne	33 min
Aug 12, 4:19 PM EDT	Special Weather Statement	JAX	Wayne	26 min
Aug 12, 4:52 PM EDT	Special Weather Statement	JAX	Camden	23 min
Aug 12, 5:06 PM EDT	Special Weather Statement	JAX	Glynn	24 min
Aug 12, 5:24 PM EDT	Special Weather Statement	JAX	Camden	36 min
Aug 12, 5:32 PM EDT	Special Weather Statement	JAX	Appling	28 min
Aug 12, 5:39 PM EDT	Special Weather Statement	JAX	Jeff Davis	36 min
Aug 12, 5:42 PM EDT	Special Weather Statement	JAX	Glynn	33 min
Aug 12, 5:48 PM EDT	Special Weather Statement	JAX	Wayne	42 min
Aug 12, 6:16 PM EDT	Special Weather Statement	JAX	Glynn	44 min
Aug 12, 6:25 PM EDT	Areal Flood Advisory	JAX	Brantley, Camden, Glynn	2 hr
Aug 12, 6:29 PM EDT	Special Weather Statement	JAX	Wayne	31 min
Aug 12, 6:51 PM EDT	Special Weather Statement	JAX	Glynn	24 min
Aug 12, 7:42 PM EDT	Special Weather Statement	JAX	Glynn	33 min
Aug 12, 7:48 PM EDT	Special Weather Statement	JAX	Clinch	42 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.