Tornado Watch 98

Issued

Mar 21, 2012, 6:02 PM CDT (23:02 UTC)

Expired

Mar 22, 2012, 3:00 AM CDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Mobile radar (KMOB), 112 km from the middle of the area, began a volume at 23:03 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

10%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

30%

• Mesoscale Discussion 320Mar 21, 3:47 PM CDT
• Mesoscale Discussion 321Mar 21, 5:40 PM CDT
• Mesoscale Discussion 322Mar 21, 9:27 PM CDT
• Mesoscale Discussion 323Mar 21, 11:49 PM CDT
• Mesoscale Discussion 324Mar 22, 2:28 AM CDT

170 
WWUS20 KWNS 212305
SEL8  
SPC WW 212305
LAZ000-MSZ000-CWZ000-220600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 98
NWS STORM PREDICTION CENTER NORMAN OK
605 PM CDT WED MAR 21 2012

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

       EXTREME SOUTHEAST LOUISIANA
       SOUTHEAST MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 605 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 APPROXIMATELY ALONG AND 40 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHWEST OF MERIDIAN
MISSISSIPPI TO 20 MILES SOUTHEAST OF BOOTHVILLE LOUISIANA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU8).

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 97...

DISCUSSION...LITTLE CHANGE IS ANTICIPATED IN THE SITUATION ACROSS
THE DELTA THROUGH LATE THIS EVENING. VERY MOIST AIRMASS WILL
CONTINUE TO UNDERGO DEEP LAYER ASCENT FOCUSED ALONG A
QUASI-STATIONARY N-S ORIENTED BAROCLINIC ZONE ASSOCIATED WITH THE
LARGE CUT-OFF LOW CENTERED ACROSS OK/TX. FORCING SHOULD MAINTAIN THE
CHANCE FOR A FEW MORE ROBUST TSTM UPDRAFTS AMIDST STRONG LOW LEVEL
SHEAR SUPPORTIVE OF ONE OR TWO BRIEF TORNADOES...AND/OR WIND DMG
EVENTS. LATEST GUIDANCE APPEARS TO SUGGEST THERE MAY BE A BRIEF LULL
IN THE STRONGER SYNOPTIC SCALE ASCENT UNTIL THE NEXT VORT LOBE
ROTATES/PIVOTS INTO THE ERN FLANK OF THE LARGE CLOSED CYCLONE LATER
TONIGHT AND STRONG ASCENT AGAIN ACTS ON THE VERY MOIST AIRMASS TO
SUPPORT RENEWED TSTM DEVELOPMENT. IN ADDITION TO THE ISOLATED SEVERE
WEATHER POTENTIAL...HEAVY RAIN WILL CONTINUE TO POSE FLOODING
PROBLEMS.

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 20040.


...CARBIN

Tornado Watches in Mississippi, 2012Tornado Watches in Louisiana, 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.