Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 170, NWS Jacksonville, FL

June 25, 2015Clinch County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 25, 2015, 7:48 PM EDT for Clinch County, Georgia. It was in force for 42 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 25, 2015, 7:48 PM EDT (23:48 UTC)
Expired: Jun 25, 2015, 8:30 PM EDT
In force: 42 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

County Clinch County, GA

The radar

The Moody AFB radar (KVAX), 28 km from the middle of the area, began a volume at 23:49 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 nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.8 hours before the alert went out and 321 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: 59 J/kg
Mixed-layer CIN: -298 J/kg
Mixed-layer LCL: 1610 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: -24 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 25, 3:00 PM EDT, 4 hours 48 minutes earlier.

Area forecast discussion, Jun 25, 3:00 PM EDT, 4 hours 48 minutes before

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Hazardous weather outlook, Jun 25, 12:27 PM EDT, 7 hours 21 minutes before

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In the hours before

Special weather statement, Jun 25, 5:23 PM EDT, 2 hours 25 minutes before

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Local storm report, Jun 25, 5:39 PM EDT, 2 hours 9 minutes before

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Special weather statement, Jun 25, 5:52 PM EDT, 1 hour 56 minutes before

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Special weather statement, Jun 25, 6:14 PM EDT, 1 hour 34 minutes before

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Special weather statement, Jun 25, 7:06 PM EDT, 42 minutes before

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Special weather statement, Jun 25, 7:38 PM EDT, 10 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 25, 10:58 AM EDT	Special Marine Warning	JAX		2 hr
Jun 25, 11:14 AM EDT	Special Weather Statement	JAX	Gilchrist	46 min
Jun 25, 11:57 AM EDT	Special Weather Statement	JAX	Alachua, Gilchrist	48 min
Jun 25, 12:48 PM EDT	Special Weather Statement	JAX	Bradford, Union	42 min
Jun 25, 1:36 PM EDT	Special Weather Statement	JAX	Baker, Clay	39 min
Jun 25, 2:17 PM EDT	Special Weather Statement	JAX	Duval, Flagler, Nassau, Saint Johns	43 min
Jun 25, 2:32 PM EDT	Special Marine Warning	JAX		118 min
Jun 25, 2:41 PM EDT	Special Weather Statement	JAX	Marion	49 min
Jun 25, 2:59 PM EDT	Special Weather Statement	JAX	Flagler	31 min
Jun 25, 3:19 PM EDT	Areal Flood Advisory	JAX	Flagler	56 min
Jun 25, 3:31 PM EDT	Special Weather Statement	JAX	Flagler	29 min
Jun 25, 6:06 PM EDT	Special Marine Warning	JAX		54 min
Jun 25, 3:27 PM EDT	Special Weather Statement	JAX	Glynn	48 min
Jun 25, 3:34 PM EDT	Areal Flood Advisory	JAX	Glynn	56 min
Jun 25, 3:43 PM EDT	Special Weather Statement	JAX	Appling, Jeff Davis, Wayne	47 min
Jun 25, 3:53 PM EDT	Special Weather Statement	JAX	Glynn	52 min
Jun 25, 4:10 PM EDT	Special Weather Statement	JAX	Wayne	50 min
Jun 25, 4:37 PM EDT	Special Weather Statement	JAX	Brantley	38 min
Jun 25, 4:42 PM EDT	Areal Flood Advisory	JAX	Brantley, Glynn, Wayne	93 min
Jun 25, 5:23 PM EDT	Special Weather Statement	JAX	Brantley	52 min
Jun 25, 5:52 PM EDT	Special Weather Statement	JAX	Camden	23 min
Jun 25, 6:14 PM EDT	Special Weather Statement	JAX	Charlton, Ware	46 min
Jun 25, 7:06 PM EDT	Special Weather Statement	JAX	Clinch	39 min
Jun 25, 7:38 PM EDT	Special Weather Statement	JAX	Clinch	52 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2015 Every severe thunderstorm warning in 2015

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.