Alert archive / Florida / Tornado Warnings in 2012

Tornado Warning 55, NWS Tallahassee, FL

August 30, 2012Walton County, Florida

NWS Tallahassee, FL issued this tornado warning at Aug 30, 2012, 2:31 AM CDT for Walton County, Florida. It was in force for 29 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, 2:31 AM CDT (07:31 UTC)
Expired
Aug 30, 2012, 3:00 AM CDT
In force
29 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

County Walton County, FL

The radar

The Eglin Afb radar (KEVX), 51 km from the middle of the area, began a volume at 07:35 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, 7.5 hours before the alert went out and 195 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.

820 
WFUS52 KTAE 300731
TORTAE
FLC131-300800-
/O.NEW.KTAE.TO.W.0055.120830T0731Z-120830T0800Z/

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

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

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

* UNTIL 300 AM CDT

* AT 225 AM CDT...A TORNADO HAS BEEN DETECTED BY THE NATIONAL        
  WEATHER SERVICE NEAR CANEY CREEK...OR NEAR LIBERTY...MOVING NORTH  
  AT 35 MPH. THIS HAS BEEN A PERSISTENTLY STRONG STORM ON RADAR...   
  AND SHOWS NO SIGNS OF WEAKENING AT THIS TIME. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LAKEWOOD AND NATURAL BRIDGE

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.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. IF YOU WAIT TO SEE OR HEAR 
IT COMING...IT MAY BE TOO LATE!

&&

LAT...LON 3099 8629 3099 8619 3083 8621 3083 8625
TIME...MOT...LOC 0728Z 181DEG 28KT 3086 8623

$$

17-GOULD
1 follow-up statement
340 
WWUS52 KTAE 300755
SVSTAE

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

FLC131-300804-
/O.EXP.KTAE.TO.W.0055.000000T0000Z-120830T0800Z/
WALTON FL-
255 AM CDT THU AUG 30 2012

...THE TORNADO WARNING FOR NORTH CENTRAL WALTON COUNTY WILL EXPIRE AT
300 AM CDT...

THE STORM WHICH WAS LIKELY PRODUCING A TORNADO HAS NOW MOVED 
NORTHWARD OUT OF WALTON COUNTY.

LAT...LON 3099 8629 3099 8619 3083 8621 3083 8625
TIME...MOT...LOC 0754Z 181DEG 28KT 3106 8623

$$

17-GOULD

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, 3:55 AM CDTSpecial Marine WarningTAE35 min
Aug 30, 4:07 AM CDTTornado WarningTAEWalton23 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.