Alert archive / Florida / Tornado Warnings in 2012

Tornado Warning 57, NWS Tallahassee, FL

August 30, 2012Walton County, Florida

NWS Tallahassee, FL issued this tornado warning at Aug 30, 2012, 4:07 AM CDT for Walton County, Florida. It was in force for 23 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
Aug 30, 2012, 4:07 AM CDT (09:07 UTC)
Expired
Aug 30, 2012, 4:30 AM CDT
In force
23 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

County Walton County, FL

The radar

The Eglin Afb radar (KEVX), 38 km from the middle of the area, began a volume at 09:07 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.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 9.1 hours before the alert went out and 181 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 2012-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 837 joules per kilogram.LCLLFCEL10008507005003002001001 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 2012-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 160 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
837 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
603 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
160 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.4

Open this sounding in Storm Lab

The text

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

467 
WFUS52 KTAE 300907
TORTAE
FLC131-300930-
/O.NEW.KTAE.TO.W.0057.120830T0907Z-120830T0930Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
407 AM CDT THU AUG 30 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN WALTON COUNTY IN THE PANHANDLE OF FLORIDA...

* UNTIL 430 AM CDT

* AT 402 AM CDT...A DEVELOPING TORNADO HAS BEEN DETECTED BY THE
  NATIONAL WEATHER SERVICE NEAR ARGYLE...MOVING NORTH AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CENTER RIDGE...UNION...PINEY GROVE...PLEASANT HILL...GLENDALE AND
  DARLINGTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! LEAVE MOBILE HOMES AND VEHICLES FOR SAFER STRUCTURES.
MOVE TO A HALLWAY OR CLOSET ON THE LOWEST FLOOR AWAY FROM WINDOWS AND
OUTSIDE WALLS.

&&

LAT...LON 3096 8619 3098 8603 3070 8604 3070 8611
TIME...MOT...LOC 0907Z 177DEG 25KT 3074 8608

$$

08-LAMERS
1 follow-up statement
424 
WWUS52 KTAE 300935
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
435 AM CDT THU AUG 30 2012

FLC131-300944-
/O.EXP.KTAE.TO.W.0057.000000T0000Z-120830T0930Z/
WALTON FL-
435 AM CDT THU AUG 30 2012

...THE TORNADO WARNING FOR EASTERN WALTON COUNTY HAS EXPIRED...

THE ROTATION HAS WEAKENED IN THE STORM THAT PROMPTED THE 
WARNING...THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER 
WEAK ROTATION WAS STILL OBSERVED BY DOPPLER RADAR...AND PEOPLE IN 
NORTHEAST WALTON AND WESTERN GENEVA COUNTIES SHOULD BE ALERT FOR 
LATER WARNINGS.

RELAY REPORTS OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE AT 
(8 5 0) 9 4 2 8 8 3 3. OR...CONTACT LAW ENFORCEMENT.

LAT...LON 3096 8619 3098 8604 3070 8604 3070 8611
TIME...MOT...LOC 0907Z 177DEG 25KT 3074 8608

$$

08-LAMERS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 30, 1:49 AM CDTTornado WarningTAEWalton26 min
Aug 30, 1:59 AM CDTTornado WarningTAEWalton31 min
Aug 30, 2:31 AM CDTTornado WarningTAEWalton29 min
Aug 30, 3:55 AM CDTSpecial Marine WarningTAE35 min
Aug 30, 4:37 AM CDTTornado WarningTAEWalton43 min
Aug 30, 6:02 AM CDTTornado WarningTAEBay, Washington28 min
Aug 30, 9:17 AM CDTSpecial Weather StatementTAEWalton28 min
Aug 30, 9:28 AM CDTTornado WarningTAEWalton32 min
Aug 30, 10:53 AM CDTSpecial Marine WarningTAE22 min
Aug 30, 10:56 AM CDTSpecial Weather StatementTAEWalton34 min
Aug 30, 12:05 PM CDTSpecial Marine WarningTAE40 min

Nearby

Tornado Warnings in Florida, 2012Every tornado warning in 2012Tornadoes 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; radar from the NEXRAD Level II archive.