Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 293, NWS Tallahassee, FL

July 17, 2012Terrell County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 17, 2012, 4:30 PM EDT for Terrell County, 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 outline as issued.

The facts

Issued
Jul 17, 2012, 4:30 PM EDT (20:30 UTC)
Expired
Jul 17, 2012, 5:15 PM EDT
In force
45 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

County Terrell County, GA

The watch it was issued in

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

IssuedProductOfficeLasted
Jul 17, 12:49 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.5 hours before the alert went out and 162 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-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 12:00Z on 2012-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2058 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2012-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2058 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
906 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
38 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

999 
WUUS52 KTAE 172030
SVRTAE
GAC273-172115-
/O.NEW.KTAE.SV.W.0293.120717T2030Z-120717T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
430 PM EDT TUE JUL 17 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  TERRELL COUNTY IN SOUTHWEST GEORGIA...

* UNTIL 515 PM EDT

* AT 425 PM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES NORTH OF
  DAWSON...OR NEAR PLEASANT HILL...AND MOVING SOUTHWEST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BRONWOOD...CHAMBLISS...PARROTT...OAKVILLE...YEOMANS...HEROD...
  GRAVES...DOVEREL AND DAWSON MUNICIPAL A/P.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY. PEOPLE OUTSIDE SHOULD MOVE INSIDE A STRONG BUILDING BUT
AWAY FROM WINDOWS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU
CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3187 8434 3166 8445 3171 8455 3177 8457
      3177 8461 3182 8461 3190 8460 3193 8457
      3193 8446 3196 8445 3196 8444
TIME...MOT...LOC 2030Z 032DEG 6KT 3189 8446

$$

38-GODSEY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 12:16 PM EDTSevere Thunderstorm WarningTAETift, Turner, Worth29 min
Jul 17, 12:38 PM EDTSevere Thunderstorm WarningTAETift, Turner, Worth37 min
Jul 17, 12:56 PM EDTSevere Thunderstorm WarningTAEGrady, Mitchell34 min
Jul 17, 1:01 PM EDTSevere Thunderstorm WarningTAETift, Turner, Worth29 min
Jul 17, 1:07 PM EDTSevere Thunderstorm WarningTAEBerrien, Cook, Lanier, Lowndes23 min
Jul 17, 1:14 PM EDTSevere Thunderstorm WarningTAEEarly, Miller31 min
Jul 17, 1:33 PM EDTAreal Flood AdvisoryTAEBerrien, Irwin, Tift117 min
Jul 17, 1:34 PM EDTSevere Thunderstorm WarningTAEBerrien, Irwin, Tift26 min
Jul 17, 1:49 PM EDTSevere Thunderstorm WarningTAEBen Hill, Irwin26 min
Jul 17, 1:56 PM EDTSevere Thunderstorm WarningTAECalhoun, Dougherty, Terrell34 min
Jul 17, 2:18 PM EDTSevere Thunderstorm WarningTAEBen Hill, Berrien, Irwin27 min
Jul 17, 2:24 PM EDTSevere Thunderstorm WarningTAEDecatur, Grady36 min
Jul 17, 2:31 PM EDTSevere Thunderstorm WarningTAEDecatur29 min
Jul 17, 2:54 PM EDTSevere Thunderstorm WarningTAEDecatur, Seminole36 min
Jul 17, 3:10 PM EDTSevere Thunderstorm WarningTAEEarly, Miller35 min
Jul 17, 3:22 PM EDTSevere Thunderstorm WarningTAEGrady, Thomas23 min
Jul 17, 4:58 PM EDTSevere Thunderstorm WarningTAEClay32 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2012Every severe thunderstorm warning in 2012

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.