Alert archive / Alabama / Tornado Watches in 2001

Tornado Watch 393

June 11, 20016 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida

The Storm Prediction Center issued this tornado watch at Jun 11, 2001, 7:45 AM CDT for 6 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jun 11, 2001, 7:45 AM CDT (12:45 UTC)
Expired: Jun 11, 2001, 1:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

Counties Baldwin County, AL, Conecuh County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 11, 7:45 AM CDT	Tornado Warning	MOB	Mobile	30 min
Jun 11, 7:59 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin	61 min
Jun 11, 8:06 AM CDT	Severe Thunderstorm Warning	MOB	Washington	24 min
Jun 11, 9:00 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia	60 min
Jun 11, 9:59 AM CDT	Tornado Warning	MOB	Baldwin	31 min

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.8 hours before the alert went out and 221 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 99 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 983 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -62 m²/s²
0-3 km storm-relative helicity: -16 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

000 
WWUS9 KMKC 111235
SEL3  

SEL3  
MKC WW 111228
ALZ000-FLZ000-CWZ000-111800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 393
STORM PREDICTION CENTER NORMAN OK
728 AM CDT MON JUN 11 2001

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

SOUTHWEST ALABAMA                            
WESTERN FLORIDA PANHANDLE                            
ADJACENT COASTAL WATERS                     

EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 745 AM UNTIL 100
PM CDT.

TORNADOES...HAIL TO 0.5 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 NORTH AND
SOUTH OF A LINE FROM 10 MILES NORTH NORTHWEST OF MOBILE ALABAMA TO
10 MILES NORTH NORTHEAST OF CRESTVIEW 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.


DISCUSSION...REMNANTS OF TROPICAL STORM ALLISON HAVE BECOME MUCH
BETTER ORGANIZED OVERNIGHT.  RADAR IMAGERY SUGGESTS THAT THE
CONVECTION IN THE MAIN BAND E OF THE CYCLONE CENTER HAS BECOME MORE
CELLULAR THE PAST HOUR...WITH OCCASIONAL MESOCYCLONE SIGNATURES. 
LOCAL VWP/S SHOW SUFFICIENT SHEAR FOR SUPERCELLS WITHIN THE MAIN
CONVECTIVE BAND...AND THE THREAT FOR A FEW SUPERCELLS MAY INCREASE
LATER THIS MORNING E OF THE MAIN BAND.  A FEW TORNADOES AND
DAMAGING GUSTS COULD ACCOMPANY THE STRONGEST STORMS. 

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 FINCH...EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 19035.


...THOMPSON

;313,0881 313,0862 301,0862 300,0881;

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 12:45 PM CDT	Tornado Watch	SPC	Barbour, Coffee, Covington, Crenshaw, Dale, Geneva and 3 more	4 hr
Jun 11, 6:15 PM CDT	Tornado Watch	SPC	Coffee, Dale, Geneva, Henry, Houston	5 hr

Nearby

Tornado Watches in Alabama, 2001 Tornado Watches in Florida, 2001 Every 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.