Tornado Watch 17

Issued

Jan 26, 2012, 4:18 AM CST (10:18 UTC)

Expired

Jan 26, 2012, 10:59 AM CST

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Mobile radar (KMOB), 76 km from the middle of the area, began a volume at 10:19 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.

Two or more tornadoes

30%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

5%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 73Jan 26, 2:05 AM CST
• Mesoscale Discussion 74Jan 26, 7:29 AM CST
• Mesoscale Discussion 75Jan 26, 9:34 AM CST

378 
WWUS20 KWNS 261031
SEL7
SPC WW 261031
ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-261800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 17
NWS STORM PREDICTION CENTER NORMAN OK
420 AM CST THU JAN 26 2012

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

       SOUTHWEST ALABAMA
       WESTERN FLORIDA PANHANDLE
       SOUTHEAST LOUISIANA
       SOUTHEAST MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS THURSDAY MORNING FROM 420 AM UNTIL NOON CST.

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 APPROXIMATELY ALONG AND 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 65 MILES WEST NORTHWEST OF
EVERGREEN ALABAMA TO 35 MILES SOUTHWEST OF BOOTHVILLE LOUISIANA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU7).

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...TSTMS ALONG REMNANT SSW-NNE PRE-FRONTAL OUTFLOW
BOUNDARY EXTENDING FROM THE GULF OF MEXICO THROUGH SE LA /JUST W OF
NEW ORLEANS/ INTO SRN MS EXPECTED TO INCREASE DURING THE NEXT
SEVERAL HOURS AS COLD FRONT OVERTAKES ACTIVITY.  ACCELERATION OF
COLD FRONT REFLECTS APPROACH OF SHORTWAVE TROUGH ATTENDANT TO
EJECTING NE TX UPR LOW. INCREASING LARGE SCALE ASCENT PROVIDED BY
THE TROUGH MAY ALSO FOSTER STORM DEVELOPMENT.
COMBINATION OF STRENGTHENING DEEP WIND FIELD...CONTINUED LOW LVL
MOISTURE INFLOW...AND...LATER THIS MORNING...SFC HEATING...COULD
SUPPORT BROKEN LINE SEGMENTS CONTAINING A FEW SUSTAINED
STORMS/SUPERCELLS.  IN ADDITION...A FEW DISCRETE STORMS/SUPERCELLS
MAY FORM IN CONFLUENT LOW LVL FLOW AHEAD OF THE FRONTAL LINE
SEGMENTS.  GIVEN RICH MOISTURE AVAILABILITY AND 40-50 KT 850-700 MB
FLOW...SETUP MAY YIELD LOCALLY DMGG WIND AND TORNADOES IN ADDITION
TO LOCALLY HEAVY RAIN.

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 21035.


...CORFIDI

Tornado Watches in Mississippi, 2012Tornado Watches in Louisiana, 2012Tornado Watches in Alabama, 2012Every tornado watch in 2012

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.