Alert archive / Georgia / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 178, NWS Jacksonville, FL

June 28, 2009Brantley County, Glynn County, Wayne County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 28, 2009, 4:18 PM EDT for Brantley County, Glynn County, Wayne County, Georgia. It was in force for 57 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 28, 2009, 4:18 PM EDT (20:18 UTC)
Expired: Jun 28, 2009, 5:15 PM EDT
In force: 57 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

Counties Brantley County, GA, Glynn County, GA, Wayne County, GA

The radar

The Jacksonville radar (KJAX), 93 km from the middle of the area, began a volume at 20:19 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

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 28, 3:41 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.3 hours before the alert went out and 260 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: 1896 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 747 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: -15 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 28, 2:49 PM EDT, 1 hour 29 minutes earlier.

Area forecast discussion, Jun 28, 2:49 PM EDT, 1 hour 29 minutes before

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Hazardous weather outlook, Jun 28, 3:50 PM EDT, 28 minutes before

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In the hours before

Special weather statement, Jun 28, 2:30 PM EDT, 1 hour 48 minutes before

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Special weather statement, Jun 28, 2:33 PM EDT, 1 hour 45 minutes before

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Special weather statement, Jun 28, 2:44 PM EDT, 1 hour 34 minutes before

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Special weather statement, Jun 28, 3:07 PM EDT, 1 hour 11 minutes before

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Special weather statement, Jun 28, 3:19 PM EDT, 59 minutes before

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Special weather statement, Jun 28, 3:54 PM EDT, 24 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 28, 2:36 AM EDT	Small Craft Advisory	JAX		8 hr
Jun 28, 1:49 PM EDT	Special Marine Warning	JAX		36 min
Jun 28, 2:24 PM EDT	Special Marine Warning	JAX		2 hr
Jun 28, 4:32 PM EDT	Severe Thunderstorm Warning	JAX	Nassau	58 min
Jun 28, 4:35 PM EDT	Special Marine Warning	JAX		115 min
Jun 28, 6:00 PM EDT	Special Weather Statement	JAX	Duval	45 min
Jun 28, 6:02 PM EDT	Special Weather Statement	JAX	Nassau	43 min
Jun 28, 6:34 PM EDT	Special Weather Statement	JAX	Duval	56 min
Jun 28, 6:43 PM EDT	Special Weather Statement	JAX	Duval	47 min
Jun 28, 7:31 PM EDT	Special Weather Statement	JAX	Saint Johns	59 min
Jun 28, 7:45 PM EDT	Special Marine Warning	JAX		90 min
Jun 28, 1:30 PM EDT	Special Weather Statement	JAX	Coffee	60 min
Jun 28, 1:43 PM EDT	Special Weather Statement	JAX	Glynn	47 min
Jun 28, 1:45 PM EDT	Special Weather Statement	JAX	Bacon	45 min
Jun 28, 1:53 PM EDT	Severe Thunderstorm Warning	JAX	Atkinson, Bacon, Coffee, Jeff Davis, Ware	53 min
Jun 28, 2:19 PM EDT	Severe Thunderstorm Warning	JAX	Glynn	56 min
Jun 28, 2:30 PM EDT	Special Weather Statement	JAX	Jeff Davis	45 min
Jun 28, 2:33 PM EDT	Special Weather Statement	JAX	Atkinson	42 min
Jun 28, 2:44 PM EDT	Special Weather Statement	JAX	Appling	46 min
Jun 28, 3:07 PM EDT	Special Weather Statement	JAX	Ware	38 min
Jun 28, 3:07 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Bacon, Brantley, Pierce, Wayne	38 min
Jun 28, 3:19 PM EDT	Special Weather Statement	JAX	Camden	41 min
Jun 28, 3:41 PM EDT	Severe Thunderstorm Warning	JAX	Charlton, Clinch, Ware	64 min
Jun 28, 3:44 PM EDT	Severe Thunderstorm Warning	JAX	Camden, Glynn	46 min
Jun 28, 3:54 PM EDT	Special Weather Statement	JAX	Brantley	51 min
Jun 28, 4:36 PM EDT	Severe Thunderstorm Warning	JAX	Charlton, Ware	39 min
Jun 28, 5:22 PM EDT	Special Weather Statement	JAX	Charlton	38 min
Jun 28, 5:31 PM EDT	Special Weather Statement	JAX	Camden	59 min
Jun 28, 5:47 PM EDT	Special Weather Statement	JAX	Glynn	43 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; radar from the NEXRAD Level II archive.