Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 21, NWS Tallahassee, FL

February 18, 20126 counties in Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Feb 18, 2012, 8:53 PM EST for 6 counties in Georgia. It was in force for 37 min. 7 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
Feb 18, 2012, 8:53 PM EST (01:53 UTC)
Expired
Feb 18, 2012, 9:30 PM EST
In force
37 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

Counties Baker County, GA, Decatur County, GA, Early County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA

The radar

The Tallahassee radar (KTLH), 87 km from the middle of the area, began a volume at 01:56 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
Feb 18, 9:01 PM ESTTSTM WND DMGColquitt, GASEVERAL TRESS AND POWER LINE DOWN.
Feb 18, 9:01 PM ESTTSTM WND DMGMitchell Co Airport, GAMULTIPLE TREES AND POWER LINES DOWN ACROSS THE COUNTY
Feb 18, 9:05 PM ESTTSTM WND DMG4 Ese Bellview, GAMOBILE HOME NEAR GA HWY 253 IN EXTREME SOUTHERN BAKER COUNTY...NEAR THE DECATUR COUNTY BORDER...WAS BLOWN OVER BY THUNDERSTORM WINDS. SOME OTHER LIGHT DAMAGE TO NEARBY TREES AND OUTBUILDINGS. ESTIMATED WIND BASED ON DAMAGE OF 70 TO 75 MPH. INITIALLY REPORTED B
Feb 18, 9:10 PM ESTTSTM WND DMG5 Wnw Vada, GATREE DAMAGE WITH A TREE FALLING ON AND DAMAGING AN OUTBUILDING. SOME POWER LINES ALSO BROUGHT DOWN NEAR A NEARBY HOUSE. ABOUT 12-15 MILES OUT OF BAINBRIDGE ON HIGHWAY 311.
Feb 18, 9:25 PM ESTTSTM WND DMGCamilla, GATREES DOWN WITH POWER OUTAGES IN PARTS OF CAMILLA. TIME ESTIMATED FROM RADAR.
Feb 18, 9:25 PM ESTTSTM WND GST 412 Sw Camilla, GAMEASURED PEAK WIND AT A RAWS SITE AT THE CAMILLA AIRPORT
Feb 18, 9:26 PM ESTTSTM WND DMGCamilla, GACOUNTY WIDE TREES AND POWER LINES DOWN. THE MAJORITY OF THESE REPORTS ARE FOCUSED ON THE SOUTHERN PART OF THE COUNTY.

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
Feb 18, 8:24 PM ESTTornado WatchSPC6 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 1.9 hours before the alert went out and 87 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 00:00Z on 2012-02-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2012-02-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 257 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
566 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
257 m²/s²
0-3 km storm-relative helicity
378 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

653 
WUUS52 KTAE 190153
SVRTAE
GAC007-087-099-201-205-253-190230-
/O.NEW.KTAE.SV.W.0021.120219T0153Z-120219T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
853 PM EST SAT FEB 18 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BAKER COUNTY IN SOUTHWEST GEORGIA...
  NORTHERN DECATUR COUNTY IN SOUTHWEST GEORGIA...
  EASTERN EARLY COUNTY IN SOUTHWEST GEORGIA...
  MILLER COUNTY IN SOUTHWEST GEORGIA...
  WESTERN MITCHELL COUNTY IN SOUTHWEST GEORGIA...
  NORTHERN SEMINOLE COUNTY IN SOUTHWEST GEORGIA...

* UNTIL 930 PM EST

* AT 847 PM EST...THE NATIONAL WEATHER SERVICE HAS DETECTED A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6
  MILES NORTH OF COLQUITT TO DONALSONVILLE...AND MOVING EAST AT 45   
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO      
  COLQUITT...NEWTON AND CAMILLA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A SMALL INTERIOR ROOM.

&&

LAT...LON 3134 8412 3108 8432 3108 8437 3102 8437
      3100 8493 3135 8474
TIME...MOT...LOC 0152Z 267DEG 40KT 3126 8465 3103 8477

$$

38-GODSEY

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 18, 7:24 PM ESTSevere Thunderstorm WarningTAEClay, Early, Miller51 min
Feb 18, 8:15 PM ESTSevere Thunderstorm WarningTAEBaker, Calhoun, Early, Miller45 min
Feb 18, 8:34 PM ESTSevere Thunderstorm WarningTAEDecatur, Seminole41 min
Feb 18, 9:10 PM ESTSevere Thunderstorm WarningTAEBaker, Dougherty, Lee, Mitchell, Worth50 min
Feb 18, 9:11 PM ESTSevere Thunderstorm WarningTAEDecatur, Grady49 min
Feb 18, 9:12 PM ESTAreal Flood AdvisoryTAEBaker, Calhoun, Colquitt, Decatur, Dougherty, Early and 8 more2 hr
Feb 18, 9:22 PM ESTSevere Thunderstorm WarningTAEColquitt, Mitchell38 min
Feb 18, 9:39 PM ESTSevere Thunderstorm WarningTAEBrooks, Colquitt, Thomas51 min
Feb 18, 9:44 PM ESTAreal Flood AdvisoryTAEBerrien, Brooks, Colquitt, Cook, Dougherty, Grady and 7 more2 hr
Feb 18, 9:50 PM ESTSevere Thunderstorm WarningTAESeminole40 min
Feb 18, 9:57 PM ESTSevere Thunderstorm WarningTAEBen Hill, Berrien, Irwin, Tift, Turner, Worth48 min
Feb 18, 10:02 PM ESTSevere Thunderstorm WarningTAEBerrien, Brooks, Colquitt, Cook, Lanier, Lowndes43 min
Feb 18, 10:30 PM ESTTornado WarningTAEBerrien, Lanier30 min
Feb 18, 10:46 PM ESTSevere Thunderstorm WarningTAEBerrien, Lanier14 min
Feb 18, 11:47 PM ESTAreal Flood AdvisoryTAEDecatur, Grady, Seminole, Thomas118 min
Feb 19, 11:12 AM ESTRiver Flood WarningTAELee27 hr

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.