Tornado Watch 43

Issued

Mar 8, 2011, 1:34 PM CST (19:34 UTC)

Expired

Mar 8, 2011, 10:23 PM CST

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Western Arkansas radar (KSRX), 185 km from the middle of the area, began a volume at 19:37 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

40%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

40%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 206Mar 8, 1:11 PM CST
• Mesoscale Discussion 208Mar 8, 6:27 PM CST

523 
WWUS20 KWNS 081935
SEL3  
SPC WW 081935
ARZ000-OKZ000-TXZ000-090200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 43
NWS STORM PREDICTION CENTER NORMAN OK
135 PM CST TUE MAR 8 2011

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

       PARTS OF SOUTHWEST ARKANSAS
       SOUTHEAST OKLAHOMA
       PARTS OF NORTH CENTRAL AND NORTHEAST TEXAS

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 135 PM UNTIL
800 PM CST.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF
MCALESTER OKLAHOMA TO 85 MILES SOUTH OF PARIS TEXAS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU3).

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 42...

DISCUSSION...AIR MASS ALONG AND E OF N/S DRY LINE HAS DESTABILIZED 
WITH MLCAPES AOA 1500 J/KG WITH FAVORABLE SHEAR PROFILES IN PLACE
FOR SUPERCELLS.  THUNDERSTORMS ARE DEVELOPING ALONG DRY LINE AND
WILL INCREASE IN NUMBER AND INTENSITY THRU THE AFTERNOON AS THEY
MOVE EWD.  WHILE LARGE HAIL IS LIKELY WITH ANY SUPERCELL...A TORNADO
THREAT IS ALSO EXPECTED GIVEN THE STRONG MID/UPPER SHEAR ACROSS THE
AREA AHEAD OF UPPER TROUGH.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24030.


...HALES

Tornado Watches in Texas, 2011Tornado Watches in Oklahoma, 2011Every tornado watch in 2011

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.