Alert archive / Florida / Tornado Warnings in 2011

Tornado Warning 40, NWS Tallahassee, FL

September 4, 2011Washington County, Florida

NWS Tallahassee, FL issued this tornado warning at Sep 4, 2011, 11:40 AM CDT for Washington County, Florida. It was in force for 25 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
Sep 4, 2011, 11:40 AM CDT (16:40 UTC)
Expired
Sep 4, 2011, 12:05 PM CDT
In force
25 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

County Washington County, FL

The radar

The Eglin Afb radar (KEVX), 14 km from the middle of the area, began a volume at 16:41 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Sep 4, 5:05 AM CDTTornado WatchSPC11 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 4.7 hours before the alert went out and 148 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 2011-09-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1223 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 2011-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 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
1223 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
468 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
179 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.3

Open this sounding in Storm Lab

The text

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

149 
WFUS52 KTAE 041640
TORTAE
FLC133-041715-
/O.NEW.KTAE.TO.W.0040.110904T1640Z-110904T1715Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1140 AM CDT SUN SEP 4 2011

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN WASHINGTON COUNTY IN THE PANHANDLE OF FLORIDA...

* UNTIL 1215 PM CDT

* AT 1136 AM CDT...A DEVELOPING TORNADO HAS BEEN DETECTED BY THE
  NATIONAL WEATHER SERVICE NEAR NEW HOPE...MOVING NORTH AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MILLERS FERRY...HOLMES VALLEY...LIVE OAK...VERNON...HINSONS
  CROSSROADS...WHITEHEAD CROSSROADS AND FIVE POINTS

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.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA.

&&

LAT...LON 3066 8587 3068 8586 3073 8582 3072 8582
      3074 8581 3074 8567 3051 8572 3051 8584
      3063 8590
TIME...MOT...LOC 1640Z 181DEG 20KT 3055 8580

$$

14-MROCZKA
1 follow-up statement
859 
WWUS52 KTAE 041705
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1205 PM CDT SUN SEP 4 2011

FLC133-041715-
/O.CAN.KTAE.TO.W.0040.000000T0000Z-110904T1715Z/
WASHINGTON FL-
1205 PM CDT SUN SEP 4 2011

...THE TORNADO WARNING FOR WESTERN WASHINGTON COUNTY IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SUNDAY EVENING
FOR SOUTHEAST ALABAMA AND CENTRAL FLORIDA AND SOUTHWESTERN GEORGIA.

LAT...LON 3066 8587 3068 8586 3073 8582 3072 8582
      3074 8581 3074 8567 3051 8572 3051 8584
      3063 8590
TIME...MOT...LOC 1705Z 181DEG 20KT 3069 8580

$$

14-MROCZKA

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 3, 9:47 PM CDTSpecial Marine WarningTAE58 min
Sep 4, 3:13 AM CDTFlash Flood WatchTAEBay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 5 more35 hr
Sep 4, 5:11 AM CDTSevere Thunderstorm WarningTAEWalton49 min
Sep 4, 5:45 AM CDTSpecial Weather StatementTAEWashington30 min
Sep 4, 8:13 AM CDTSpecial Marine WarningTAE32 min
Sep 4, 8:40 AM CDTSpecial Marine WarningTAE50 min
Sep 4, 9:59 AM CDTTornado WarningTAEWalton31 min
Sep 4, 10:20 AM CDTTornado WarningTAEBay, Washington40 min
Sep 4, 1:37 PM CDTSpecial Marine WarningTAE38 min
Sep 4, 2:07 PM CDTSpecial Weather StatementTAEWakulla23 min
Sep 4, 2:13 PM CDTSpecial Marine WarningTAE47 min
Sep 4, 2:27 PM CDTSpecial Weather StatementTAEFranklin48 min
Sep 4, 2:32 PM CDTCoastal Flood WatchTAEBay, Dixie, Franklin, Gulf, Jefferson, Taylor and 2 more25 hr
Sep 4, 2:36 PM CDTSpecial Weather StatementTAEGadsden, Leon, Wakulla39 min
Sep 4, 2:43 PM CDTSpecial Marine WarningTAE47 min
Sep 4, 3:12 PM CDTSpecial Weather StatementTAEJefferson48 min
Sep 4, 3:49 PM CDTSpecial Marine WarningTAE41 min
Sep 4, 4:03 PM CDTTornado WarningTAETaylor27 min
Sep 4, 4:29 PM CDTSpecial Marine WarningTAE61 min
Sep 4, 4:46 PM CDTSpecial Marine WarningTAE44 min
Sep 4, 4:58 PM CDTSpecial Marine WarningTAE47 min
Sep 4, 6:01 PM CDTSpecial Marine WarningTAE44 min
Sep 4, 6:44 PM CDTSpecial Marine WarningTAE61 min
Sep 4, 6:48 PM CDTSpecial Marine WarningTAE27 min

Nearby

Tornado Warnings in Florida, 2011Every tornado warning in 2011Tornadoes in 2011

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.