Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 274, NWS Tallahassee, FL

July 17, 2012Decatur County, Grady County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 17, 2012, 2:24 PM EDT for Decatur County, Grady County, Georgia. It was in force for 36 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 17, 2012, 2:24 PM EDT (18:24 UTC)
Expired
Jul 17, 2012, 3:00 PM EDT
In force
36 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

Counties Decatur County, GA, Grady County, GA

The radar

The Tallahassee radar (KTLH), 53 km from the middle of the area, began a volume at 18:25 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.

What was reported inside it

TimeReportWhereRemark
Jul 17, 2:30 PM EDTTSTM WND DMGCairo, GAONE LARGE TREE DOWN ON 4TH AVE SE IN CAIRO BY SOUTHSIDE ELEMENTARY, POWER WAS OUT IN THE AREA.
Jul 17, 2:34 PM EDTTSTM WND DMG3 Se Whigham, GACOUNTY DISPATCH REPORTS TREES DOWN IN PARTS OF GRADY COUNTY.
Jul 17, 2:34 PM EDTTSTM WND DMGNe Cairo, GATREE DOWN ON HOME AT 891 BOLD SPRINGS ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 6.4 hours before the alert went out and 52 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.

880 
WUUS52 KTAE 171824
SVRTAE
GAC087-131-171900-
/O.NEW.KTAE.SV.W.0274.120717T1824Z-120717T1900Z/

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

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DECATUR COUNTY IN SOUTHWEST GEORGIA...
  GRADY COUNTY IN SOUTHWEST GEORGIA...

* UNTIL 300 PM EDT

* AT 224 PM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
  WINDS OF 60 MPH.  THIS STORM WAS LOCATED NEAR WHIGHAM...
  AND MOVING SOUTHWEST AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BOYDVILLE...PRINCES STILL...CLIMAX...BEACHTON...ROCKY HILL...
  RENO...NICKLEVILLE...MONCRIEF...LAINGKAT...FOWLSTOWN...FACEVILLE...
  CALVARY...ATTAPULGUS AND AMSTERDAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTINUOUS 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 3098 8412 3097 8412 3092 8408 3068 8409
      3067 8410 3071 8469 3100 8441
TIME...MOT...LOC 1824Z 028DEG 10KT 3091 8433

$$

9-FOURNIER

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, 2:31 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, 4:30 PM EDTSevere Thunderstorm WarningTAETerrell45 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.