Alert archive / Georgia / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 10, NWS Jacksonville, FL

February 13, 20138 counties in Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Feb 13, 2013, 5:39 AM EST for 8 counties in Georgia. It was in force for 51 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: Feb 13, 2013, 5:39 AM EST (10:39 UTC)
Expired: Feb 13, 2013, 6:30 AM EST
In force: 51 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

Counties Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Coffee County, GA, Pierce County, GA, Ware County, GA, Wayne County, GA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 13, 5:31 AM EST	Tornado Watch	SPC	3 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 10.7 hours before the alert went out and 120 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: 218 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 887 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 186 m²/s²
0-3 km storm-relative helicity: 359 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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 Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 13, 4:45 AM EST, 54 minutes earlier.

Area forecast discussion, Feb 13, 4:45 AM EST, 54 minutes before

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Hazardous weather outlook, Feb 13, 4:23 AM EST, 1 hour 16 minutes before

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In the hours before

Special weather statement, Feb 13, 12:10 AM EST, 5 hours 29 minutes before

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Special weather statement, Feb 13, 12:56 AM EST, 4 hours 43 minutes before

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Special weather statement, Feb 13, 3:47 AM EST, 1 hour 52 minutes before

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Special weather statement, Feb 13, 4:29 AM EST, 1 hour 10 minutes before

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Special weather statement, Feb 13, 4:58 AM EST, 41 minutes before

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Special weather statement, Feb 13, 5:18 AM EST, 21 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 12, 8:06 PM EST	Marine Dense Fog Advisory	JAX		6 hr
Feb 13, 3:09 AM EST	Areal Flood Advisory	JAX	Baker, Bradford, Columbia, Hamilton, Suwannee, Union	38 days
Feb 13, 3:49 AM EST	Lake Wind Advisory	JAX	Baker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more	11 hr
Feb 13, 8:01 AM EST	Special Weather Statement	JAX	Gilchrist, Union	44 min
Feb 13, 8:39 AM EST	Special Weather Statement	JAX	Bradford, Clay, Union	51 min
Feb 13, 9:21 AM EST	Severe Thunderstorm Warning	JAX	Clay, Duval, Saint Johns	39 min
Feb 13, 9:37 AM EST	Special Weather Statement	JAX	Bradford	23 min
Feb 13, 9:43 AM EST	Special Marine Warning	JAX		2 hr
Feb 13, 10:15 AM EST	Special Weather Statement	JAX	Duval	30 min
Feb 13, 1:20 PM EST	Special Marine Warning	JAX		85 min
Feb 12, 11:18 PM EST	Special Weather Statement	JAX	Coffee	27 min
Feb 12, 11:21 PM EST	Severe Thunderstorm Warning	JAX	Coffee	39 min
Feb 12, 11:32 PM EST	Severe Thunderstorm Warning	JAX	Appling, Bacon, Coffee, Pierce, Ware	43 min
Feb 13, 12:10 AM EST	Special Weather Statement	JAX	Pierce	35 min
Feb 13, 12:56 AM EST	Special Weather Statement	JAX	Appling, Bacon, Coffee	49 min
Feb 13, 3:47 AM EST	Special Weather Statement	JAX	Atkinson, Bacon	43 min
Feb 13, 4:29 AM EST	Special Weather Statement	JAX	Ware	31 min
Feb 13, 4:58 AM EST	Special Weather Statement	JAX	Pierce	32 min
Feb 13, 5:18 AM EST	Special Weather Statement	JAX	Bacon, Coffee	42 min
Feb 13, 6:17 AM EST	Special Weather Statement	JAX	Wayne	28 min
Feb 13, 6:50 AM EST	Special Weather Statement	JAX	Glynn	25 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2013 Every severe thunderstorm warning in 2013

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.