Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 313, NWS Tallahassee, FL

July 25, 2012Decatur County, Grady County, Thomas County, Georgia; Gadsden County, Leon County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 25, 2012, 3:42 PM EDT for Decatur County, Grady County, Thomas County, Georgia; Gadsden County, Leon County, Florida. It was in force for 63 min. 4 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 25, 2012, 3:42 PM EDT (19:42 UTC)
Expired
Jul 25, 2012, 4:45 PM EDT
In force
63 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

Counties Gadsden County, FL, Leon County, FL, Decatur County, GA, Grady County, GA, Thomas County, GA

The radar

The Tallahassee radar (KTLH), 40 km from the middle of the area, began a volume at 19:45 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 25, 3:55 PM EDTTSTM WND DMG2 E Bainbridge, GASEVERAL TREES DOWN.
Jul 25, 4:00 PM EDTTSTM WND DMGCalvary, GASEVERAL TREES DOWN IN GRADY COUNTY
Jul 25, 4:15 PM EDTTSTM WND DMG3 Nnw Lake Iamonia, FLTREE DOWN NEAR INTERSECTION OF NORTH MERIDIAN ROAD AND FAIRBANKS FERRY ROAD.
Jul 25, 4:30 PM EDTTSTM WND DMGQuincy, FLTREE AND POWER LINE DOWN IN QUINCY.

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

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.7 hours before the alert went out and 40 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 2012-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2761 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 2012-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
2761 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
873 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
40 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.

039 
WUUS52 KTAE 251942
SVRTAE
FLC039-073-GAC087-131-275-252045-
/O.NEW.KTAE.SV.W.0313.120725T1942Z-120725T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
342 PM EDT WED JUL 25 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN GADSDEN COUNTY IN FLORIDA...
  NORTHEASTERN LEON COUNTY IN FLORIDA...
  SOUTHWESTERN THOMAS COUNTY IN SOUTH CENTRAL GEORGIA...
  SOUTHEASTERN DECATUR COUNTY IN SOUTHWEST GEORGIA...
  SOUTHERN GRADY COUNTY IN SOUTHWEST GEORGIA...

* UNTIL 445 PM EDT

* AT 336 PM EDT...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 FOWLSTOWN   TO CLIMAX TO PRINCES STILL TO           
  THOMASVILLE...AND MOVING SOUTH AT 10   MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  QUINCY

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.

&&

LAT...LON 3094 8455 3091 8444 3086 8425 3094 8393
      3088 8390 3068 8401 3053 8402 3051 8422
      3054 8451 3062 8479
TIME...MOT...LOC 1941Z 355DEG 9KT 3084 8456 3081 8443
          3076 8424 3085 8396

$$

15-HARRIGAN
1 follow-up statement
509 
WWUS52 KTAE 252019
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
419 PM EDT WED JUL 25 2012

GAC087-131-275-252028-
/O.CAN.KTAE.SV.W.0313.000000T0000Z-120725T2045Z/
THOMAS GA-GRADY GA-DECATUR GA-
419 PM EDT WED JUL 25 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DECATUR...
SOUTHERN GRADY AND SOUTHWESTERN THOMAS COUNTIES IS CANCELLED...

LAT...LON 3053 8404 3051 8422 3054 8451 3062 8479
      3071 8473 3067 8403
TIME...MOT...LOC 2018Z 355DEG 9KT 3064 8648 3060 8635
          3055 8616 3063 8588

$$

FLC039-073-252045-
/O.CON.KTAE.SV.W.0313.000000T0000Z-120725T2045Z/
LEON FL-GADSDEN FL-
419 PM EDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR NORTHERN GADSDEN AND NORTHEASTERN LEON COUNTIES...

AT 416 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM CENTRAL GADSDEN THROUGH CENTRAL LEON 
COUNTIES...MOVING SOUTH AT 10 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3053 8404 3051 8422 3054 8451 3062 8479
      3071 8473 3067 8403
TIME...MOT...LOC 2018Z 355DEG 9KT 3064 8648 3060 8635
          3055 8616 3063 8588

$$

15-HARRIGAN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 3:20 PM EDTSevere Thunderstorm WarningTAEDecatur, Grady, Thomas40 min
Jul 25, 4:25 PM EDTSevere Thunderstorm WarningTAEDecatur35 min
Jul 25, 5:47 PM EDTSevere Thunderstorm WarningTAELowndes28 min
Jul 25, 5:59 PM EDTSevere Thunderstorm WarningTAELee, Terrell31 min
Jul 25, 6:13 PM EDTSevere Thunderstorm WarningTAELowndes32 min
Jul 25, 6:24 PM EDTSevere Thunderstorm WarningTAEClay, Early51 min
Jul 25, 6:58 PM EDTSevere Thunderstorm WarningTAERandolph47 min
Jul 25, 7:34 PM EDTSevere Thunderstorm WarningTAEClay, Quitman, Randolph41 min
Jul 25, 10:05 AM EDTSpecial Marine WarningTAE85 min
Jul 25, 11:22 AM EDTSpecial Marine WarningTAE53 min
Jul 25, 11:26 AM EDTSpecial Marine WarningTAE94 min
Jul 25, 12:09 PM EDTSpecial Marine WarningTAE66 min
Jul 25, 12:56 PM EDTSpecial Marine WarningTAE94 min
Jul 25, 12:58 PM EDTSpecial Marine WarningTAE57 min
Jul 25, 2:21 PM EDTSevere Thunderstorm WarningTAETaylor39 min
Jul 25, 3:29 PM EDTSpecial Marine WarningTAE31 min
Jul 25, 4:15 PM EDTSevere Thunderstorm WarningTAEGadsden, Leon, Liberty45 min
Jul 25, 4:39 PM EDTSevere Thunderstorm WarningTAEFranklin, Gulf, Liberty36 min
Jul 25, 6:05 PM EDTSpecial Marine WarningTAE55 min
Jul 25, 6:20 PM EDTSevere Thunderstorm WarningTAEBay, Walton, Washington25 min
Jul 25, 6:41 PM EDTSpecial Marine WarningTAE79 min
Jul 25, 6:44 PM EDTSevere Thunderstorm WarningTAEHolmes, Walton, Washington17 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2012Severe Thunderstorm Warnings in Florida, 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.