Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 404, NWS Tallahassee, FL

October 1, 2012Walton County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Oct 1, 2012, 7:10 AM CDT for Walton County, Florida. It was in force for 35 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
Oct 1, 2012, 7:10 AM CDT (12:10 UTC)
Expired
Oct 1, 2012, 7:45 AM CDT
In force
35 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

County Walton County, FL

The radar

The Eglin Afb radar (KEVX), 32 km from the middle of the area, began a volume at 12:13 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 12:00Z, 0.2 hours before the alert went out and 183 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 2012-10-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1356 joules per kilogram.LCLEL10008507005003002001001 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 2012-10-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.193958Sfc1 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
1356 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
573 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
217 m²/s²
Significant tornado parameter
0.9
Supercell composite
7.0

Open this sounding in Storm Lab

The text

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

441 
WUUS52 KTAE 011210
SVRTAE
FLC131-011245-
/O.NEW.KTAE.SV.W.0404.121001T1210Z-121001T1245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
710 AM CDT MON OCT 1 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN WALTON COUNTY IN THE PANHANDLE OF FLORIDA...

* UNTIL 745 AM CDT

* AT 708 AM CDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH.  THIS STORM WAS LOCATED 9 MILES SOUTH OF SANTA ROSA BEACH...OR
  7 MILES SOUTHWEST OF BLUE MOUNTAIN BEACH...AND MOVING NORTHEAST AT
  50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SANDESTIN...FOUR MILE VILLAGE...TURQUOISE BEACH...GRAYTON BEACH...
  SEASIDE...SEAGROVE BEACH...PORT WASHINGTON...BUNKER...PORTLAND AND
  FREEPORT.

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 3040 8637 3040 8634 3043 8632 3041 8629
      3043 8624 3039 8615 3039 8613 3047 8621
      3047 8632 3062 8620 3045 8592 3042 8599
      3039 8599 3029 8607 3035 8628 3037 8639
TIME...MOT...LOC 1211Z 222DEG 42KT 3030 8625

$$

42-DVD
1 follow-up statement
414 
WWUS52 KTAE 011240
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
740 AM CDT MON OCT 1 2012

FLC131-011251-
/O.EXP.KTAE.SV.W.0404.000000T0000Z-121001T1245Z/
WALTON FL-
740 AM CDT MON OCT 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WALTON COUNTY WILL
EXPIRE AT 745 AM CDT...

RELAY REPORTS OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN
TALLAHASSEE AT (8 5 0) 9 4 2 8 8 3 3. OR...YOU MAY CONTACT THE
NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT.
THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

LAT...LON 3040 8637 3040 8634 3043 8632 3041 8629
      3043 8624 3039 8615 3039 8613 3047 8621
      3047 8632 3062 8620 3045 8592 3042 8599
      3039 8599 3029 8607 3035 8628 3037 8639
TIME...MOT...LOC 1241Z 222DEG 42KT 3056 8598

$$

42-DVD

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 1, 1:43 AM CDTWind AdvisoryTAEBay, Calhoun, Gulf, Holmes, Jackson, Walton and 1 more7 hr
Oct 1, 1:46 AM CDTRip Current StatementTAEBay, Gulf, Walton15 hr
Oct 1, 1:46 AM CDTHigh Surf AdvisoryTAEBay, Gulf, Walton15 hr
Oct 1, 6:53 AM CDTSpecial Marine WarningTAE67 min
Oct 1, 7:55 AM CDTSpecial Marine WarningTAE80 min
Oct 1, 10:25 AM CDTSpecial Marine WarningTAE65 min
Oct 1, 11:12 AM CDTSpecial Weather StatementTAEJackson33 min
Oct 1, 11:16 AM CDTSevere Thunderstorm WarningTAEJackson29 min
Oct 1, 11:43 AM CDTSpecial Weather StatementTAEJackson47 min

Nearby

Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.