Alert archive / Georgia / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 155, NWS Jacksonville, FL

June 18, 20097 counties in Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 18, 2009, 10:00 PM EDT for 7 counties in Georgia. It was in force for 45 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: Jun 18, 2009, 10:00 PM EDT (02:00 UTC)
Expired: Jun 18, 2009, 10:45 PM EDT
In force: 45 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

Counties Atkinson County, GA, Brantley County, GA, Charlton County, GA, Clinch County, GA, Echols County, GA, Pierce County, GA, Ware 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
Jun 18, 6:22 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 2.0 hours before the alert went out and 95 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: 1973 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1130 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 120 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 Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 18, 2:55 PM EDT, 7 hours 5 minutes earlier.

Area forecast discussion, Jun 18, 2:55 PM EDT, 7 hours 5 minutes before

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Hazardous weather outlook, Jun 18, 6:34 PM EDT, 3 hours 26 minutes before

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In the hours before

Special weather statement, Jun 18, 6:42 PM EDT, 3 hours 18 minutes before

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Special weather statement, Jun 18, 6:47 PM EDT, 3 hours 13 minutes before

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Local storm report, Jun 18, 7:15 PM EDT, 2 hours 45 minutes before

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Special weather statement, Jun 18, 7:22 PM EDT, 2 hours 38 minutes before

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Special weather statement, Jun 18, 7:23 PM EDT, 2 hours 37 minutes before

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Special weather statement, Jun 18, 7:32 PM EDT, 2 hours 28 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
Jun 18, 8:08 PM EDT	Special Weather Statement	JAX	Hamilton	52 min
Jun 18, 9:00 PM EDT	Special Weather Statement	JAX	Hamilton, Suwannee	45 min
Jun 18, 9:04 PM EDT	Special Marine Warning	JAX		116 min
Jun 18, 9:06 PM EDT	Severe Thunderstorm Warning	JAX	Hamilton, Suwannee	39 min
Jun 18, 9:11 PM EDT	Areal Flood Advisory	JAX	Hamilton, Suwannee	2 hr
Jun 18, 10:34 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Columbia, Hamilton, Suwannee	56 min
Jun 18, 10:50 PM EDT	Severe Thunderstorm Warning	JAX	Duval, Nassau	55 min
Jun 18, 11:04 PM EDT	Severe Thunderstorm Warning	JAX	Nassau	32 min
Jun 18, 11:11 PM EDT	Special Weather Statement	JAX	Columbia, Gilchrist, Suwannee	49 min
Jun 18, 11:28 PM EDT	Special Weather Statement	JAX	Nassau	47 min
Jun 18, 11:32 PM EDT	Special Weather Statement	JAX	Alachua, Bradford	43 min
Jun 18, 11:47 PM EDT	Special Weather Statement	JAX	Clay	43 min
Jun 19, 1:29 PM EDT	Heat Advisory	JAX	Baker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more	55 hr
Jun 18, 8:06 PM EDT	Special Weather Statement	JAX	Atkinson	24 min
Jun 18, 8:11 PM EDT	Severe Thunderstorm Warning	JAX	Clinch, Echols	49 min
Jun 18, 8:19 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Jeff Davis, Wayne	41 min
Jun 18, 8:46 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Bacon, Coffee, Jeff Davis, Wayne	44 min
Jun 18, 8:57 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Atkinson, Bacon, Coffee, Pierce, Ware	48 min
Jun 18, 9:08 PM EDT	Special Weather Statement	JAX	Coffee	52 min
Jun 18, 9:14 PM EDT	Severe Thunderstorm Warning	JAX	Brantley, Pierce, Wayne	22 min
Jun 18, 9:19 PM EDT	Severe Thunderstorm Warning	JAX	Glynn	56 min
Jun 18, 9:37 PM EDT	Severe Thunderstorm Warning	JAX	Atkinson, Clinch, Coffee, Pierce, Ware	25 min
Jun 18, 9:53 PM EDT	Special Weather Statement	JAX	Ware	67 min
Jun 18, 9:57 PM EDT	Severe Thunderstorm Warning	JAX	Camden	63 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.