Tornado Watch 364

Issued

May 24, 2011, 8:05 PM CDT (01:05 UTC)

In effect from

May 24, 2011, 8:10 PM CDT

Expired

May 25, 2011, 2:59 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Western Arkansas radar (KSRX), 62 km from the middle of the area, began a volume at 01:07 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

70%

One or more EF2 to EF5 tornadoes

30%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 942May 24, 7:42 PM CDT
• Mesoscale Discussion 945May 24, 11:24 PM CDT
• Mesoscale Discussion 946May 25, 12:48 AM CDT

653 
WWUS20 KWNS 250107
SEL4
SPC WW 250107
ARZ000-LAZ000-OKZ000-TXZ000-250800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 364
NWS STORM PREDICTION CENTER NORMAN OK
810 PM CDT TUE MAY 24 2011

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

       WESTERN AND NORTHERN ARKANSAS
       EXTREME NORTHWEST LOUISIANA
       EXTREME EASTERN OKLAHOMA
       NORTHEAST TEXAS

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 810 PM
UNTIL 300 AM CDT.

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 95 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH NORTHWEST OF
FAYETTEVILLE ARKANSAS TO 45 MILES WEST OF SHREVEPORT LOUISIANA.
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 356...WW 360...WW
361...WW 362...WW 363...

DISCUSSION...BROKEN BAND OF WARM SECTOR SUPERCELLS WILL LIKELY
PERSIST INTO THE EARLY OVERNIGHT HOURS AS THE STRONG MIDLEVEL TROUGH
PROGRESSES EWD OVER N TX AND OK.  INSTABILITY IS NOT AS STRONG AS
EARLIER AND FARTHER W...BUT SHOULD REMAIN SUFFICIENT FOR STRONG
UPDRAFTS.  VERTICAL SHEAR WILL INCREASE FROM W TO E WITH THE
APPROACH OF THE MIDLEVEL TROUGH...AND WILL BE SUPPORTIVE OF
SUPERCELLS WITH A RISK FOR TORNADOES...LARGE HAIL...AND DAMAGING
WINDS.

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
550. MEAN STORM MOTION VECTOR 26035.


...THOMPSON

Tornado Watches in Arkansas, 2011Tornado 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.