Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 23, NWS Tallahassee, FL

February 18, 2012Decatur County, Grady County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Feb 18, 2012, 9:11 PM EST for Decatur County, Grady County, Georgia. It was in force for 49 min. 6 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, 9:11 PM EST (02:11 UTC)
Expired
Feb 18, 2012, 10:00 PM EST
In force
49 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

Counties Decatur County, GA, Grady County, GA

The radar

The Tallahassee radar (KTLH), 60 km from the middle of the area, began a volume at 02:12 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, 9:15 PM ESTTSTM WND GST 495 Nw Bainbridge, GA43 KNOT WIND GUST AT BAINBRIDGE AWOS KBGE.
Feb 18, 9:20 PM ESTTSTM WND DMG2 Nnw Bethany, GATREES BLOWN DOWN ALONG YATES SPRING ROAD.
Feb 18, 9:20 PM ESTTSTM WND DMGBainbridge, GAMULTIPLE TREES AND POWER LINES DOWN ACROSS COUNTY
Feb 18, 9:20 PM ESTTSTM WND DMGWhigham, GAMULTIPLE TREES AND POWER LINES DOWN ACROSS THE COUNTY
Feb 18, 9:23 PM ESTTSTM WND DMG3 E Bainbridge, GATREES REPORTED DOWN NEAR BLACK JACK RD AND POWER LINES DOWN AROUND BAINBRIDGE.
Feb 18, 9:40 PM ESTTSTM WND DMGWhigham, GAMULTIPLE TREES AND POWER LINES DOWN ACROSS 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, 2.2 hours before the alert went out and 59 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°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.

488 
WUUS52 KTAE 190211
SVRTAE
GAC087-131-190300-
/O.NEW.KTAE.SV.W.0023.120219T0211Z-120219T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
911 PM EST SAT FEB 18 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 1000 PM EST

* AT 908 PM EST...THE NATIONAL WEATHER SERVICE HAS DETECTED A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED     
  ALONG A LINE EXTENDING FROM 6 MILES NORTH OF BAINBRIDGE TO 10      
  MILES SOUTHWEST OF BAINBRIDGE...AND MOVING EAST AT 55 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
  BAINBRIDGE...WHIGHAM AND CAIRO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO GROUND 
LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY!

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 3107 8412 3097 8412 3092 8408 3087 8407
      3067 8409 3072 8485 3101 8464 3108 8437
TIME...MOT...LOC 0210Z 269DEG 49KT 3100 8451 3083 8468

$$

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, 8:53 PM ESTSevere Thunderstorm WarningTAEBaker, Decatur, Early, Miller, Mitchell, Seminole37 min
Feb 18, 9:10 PM ESTSevere Thunderstorm WarningTAEBaker, Dougherty, Lee, Mitchell, Worth50 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.