Alert archive / Florida / Tornado Watches in 2001

Tornado Watch 791

October 13, 20016 counties in Alabama; 9 counties in Florida; Seminole County, Georgia

The Storm Prediction Center issued this tornado watch at Oct 13, 2001, 9:45 PM CDT for 6 counties in Alabama; 9 counties in Florida; Seminole County, Georgia. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Oct 13, 2001, 9:45 PM CDT (02:45 UTC)
Expired
Oct 14, 2001, 1:00 AM CDT
In force
3 hr
Issued by
the Storm Prediction Center

Counties Coffee County, AL, Covington County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Franklin County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Walton County, FL, Washington County, FL, Seminole County, GA

Warnings issued inside it

2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Oct 13, 10:12 PM CDTTornado WarningTAEBay, Holmes, Walton, Washington33 min
Oct 13, 10:49 PM CDTTornado WarningTAEBay, Washington41 min

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 2.8 hours before the alert went out and 119 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 2001-10-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2001-10-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1342 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
191 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.

271 
WWUS9 KMKC 140228
SEL1  

SEL1  
MKC WW 140221
ALZ000-FLZ000-CWZ000-140600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 791
STORM PREDICTION CENTER NORMAN OK
921 PM CDT SAT OCT 13 2001

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   SOUTHEAST ALABAMA                            
   NORTHWEST FLORIDA                            
   COASTAL WATERS                     

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 945 PM UNTIL
100 AM CDT.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO
70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 50 STATUTE MILES EAST AND WEST
OF A LINE FROM 35 MILES NORTHWEST OF DOTHAN ALABAMA TO 15 MILES
SOUTHWEST OF APALACHICOLA FLORIDA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...  CONTINUE...WW 790...

DISCUSSION...SMALL SUPERCELL THUNDERSTORMS CONTINUE TO DEVELOP OVER
THE COASTAL WATERS OF THE GULF AND MOVE RAPIDLY NNEWD INTO NWRN
FL...WHILE LINE OF STRONG/SEVERE STORMS OVER SRN AL/EXTREME NWRN FL
IS MOVING ENEWD 40 KT.  ALTHOUGH INSTABILITY DIMINISHES AWAY FROM
COASTAL AREAS...VAD WINDS FROM AREA RADARS SHOW 50 KT FLOW WITHIN
1 KM AGL AND VEERING PROFILES WITH HEIGHT RESULTING IN VERY STRONG
LOW LEVEL SHEAR/HELICITY.  THIS SUGGESTS POTENTIAL FOR ISOLATED
TORNADOES OVER THE NEXT SEVERAL HOURS.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH...EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. 
MEAN STORM MOTION VECTOR 21045.


...WEISS

314,0850 293,0842 293,0860 314,0864

Nearby

Tornado Watches in Florida, 2001Tornado Watches in Alabama, 2001Tornado Watches in Georgia, 2001Every tornado watch in 2001

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.