Tornado Watch 197

Issued

Apr 24, 2011, 5:36 PM CDT (22:36 UTC)

Expired

Apr 25, 2011, 1:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Western Arkansas radar (KSRX), 117 km from the middle of the area, began a volume at 22:38 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 552Apr 24, 3:31 PM CDT
• Mesoscale Discussion 556Apr 24, 5:34 PM CDT
• Mesoscale Discussion 557Apr 24, 6:23 PM CDT
• Mesoscale Discussion 561Apr 24, 10:13 PM CDT

585 
WWUS20 KWNS 242236
SEL7
SPC WW 242236
ARZ000-OKZ000-250600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 197
NWS STORM PREDICTION CENTER NORMAN OK
540 PM CDT SUN APR 24 2011

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

       PARTS OF WESTERN ARKANSAS
       PARTS OF EASTERN OKLAHOMA

EFFECTIVE THIS SUNDAY AFTERNOON AND MONDAY MORNING FROM 540 PM
UNTIL 100 AM CDT.

TORNADOES...HAIL TO 2 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 40 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 20 MILES NORTHWEST OF DURANT
OKLAHOMA TO 40 MILES EAST OF FORT SMITH ARKANSAS.  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.

OTHER WATCH INFORMATION...CONTINUE...WW 192...WW 194...WW
195...WW 196...

DISCUSSION...SEVERE THUNDERSTORMS DEVELOPING EWD ACROSS THE WATCH
WITH NOW FAVORABLE VEERING SHEAR PROFILES IN PLACE FOR TORNADIC
SUPERCELLS. PRIMARY THREAT WILL OCCUR ALONG E/W OUTFLOW BOUNDARY
CURRENTLY FROM N OF MLC TO S OF FSM.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 26035.


...HALES

Tornado Watches in Arkansas, 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.