Tornado Watch 84

Issued

Mar 27, 2009, 10:09 PM CDT (03:09 UTC)

Expired

Mar 28, 2009, 7:00 AM CDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

70 kt

The Mobile radar (KMOB), 113 km from the middle of the area, began a volume at 03:10 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

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 303Mar 27, 6:18 PM CDT
• Mesoscale Discussion 305Mar 27, 8:21 PM CDT
• Mesoscale Discussion 309Mar 27, 11:51 PM CDT
• Mesoscale Discussion 312Mar 28, 3:14 AM CDT
• Mesoscale Discussion 313Mar 28, 4:25 AM CDT
• Mesoscale Discussion 315Mar 28, 6:48 AM CDT

019 
WWUS20 KWNS 280312
SEL4  
SPC WW 280312
ALZ000-FLZ000-MSZ000-CWZ000-281000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 84
NWS STORM PREDICTION CENTER NORMAN OK
1010 PM CDT FRI MAR 27 2009

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

       SOUTHWEST ALABAMA
       WESTERN FLORIDA PANHANDLE
       SOUTHERN MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1010 PM
UNTIL 500 AM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 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 30 MILES NORTH OF SELMA
ALABAMA TO 45 MILES SOUTHEAST OF GULFPORT MISSISSIPPI.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU4).

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 82...WW 83...

DISCUSSION...WIDESPREAD INTENSE STORMS ALONG WARM FRONT LIFTING NEWD
ACROSS MS DELTA AREA WILL CONTINUE TO POSE A THREAT FOR
TORNADOES...DAMAGING WINDS...AND VERY LARGE HAIL OVERNIGHT. THIS
ACTIVITY APPEARS TO BE SUPPORTED IN PART BY LOW-AMPLITUDE SHORT WAVE
TROUGH LEADING THE LARGER SCALE DEEP-LAYER CYCLONE DEVELOPING TO THE
WEST. INFLUX OF RICH GULF MOISTURE AND INCREASINGLY STRONG LOW LEVEL
SHEAR NEAR THE WARM FRONT WILL ALLOW STORM UPDRAFTS TO PERSIST AND
OCCASIONALLY EXHIBIT STRONG ROTATION. TORNADO POTENTIAL WILL ALSO
EXIST WITH CELLS INCREASING AND MOVING ONSHORE FROM THE NCNTRL GULF
GIVEN PRONOUNCED INCREASE IN LOW LEVEL HODOGRAPH CURVATURE EVIDENT
ON MOB VWP DATA LAST COUPLE OF HOURS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 26025.


...CARBIN

Tornado Watches in Alabama, 2009Tornado Watches in Mississippi, 2009Tornado Watches in Florida, 2009Every tornado watch in 2009

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.