Tornado Watch 149

Issued

Mar 31, 2008, 3:45 PM CDT (20:45 UTC)

Expired

Mar 31, 2008, 10:42 PM 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), 57 km from the middle of the area, began a volume at 20:48 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

60%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

80%

One or more hailstones of 2 inches or more

40%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 521Mar 31, 12:20 PM CDT
• Mesoscale Discussion 523Mar 31, 1:10 PM CDT
• Mesoscale Discussion 524Mar 31, 3:04 PM CDT
• Mesoscale Discussion 525Mar 31, 3:49 PM CDT
• Mesoscale Discussion 526Mar 31, 5:28 PM CDT
• Mesoscale Discussion 527Mar 31, 8:12 PM CDT

000
WWUS20 KWNS 312045
SEL9  
SPC WW 312045
ARZ000-MOZ000-OKZ000-010400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 149
NWS STORM PREDICTION CENTER NORMAN OK
345 PM CDT MON MAR 31 2008

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

       NORTHERN AND WESTERN ARKANSAS
       SOUTHERN MISSOURI
       EASTERN OKLAHOMA

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 345 PM UNTIL
1100 PM 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 50 STATUTE
MILES EITHER SIDE OF A LINE FROM 30 MILES SOUTH SOUTHWEST OF
MCALESTER OKLAHOMA TO 60 MILES NORTHEAST OF WEST PLAINS MISSOURI.
 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 146...WW 147...WW 148...

DISCUSSION...LINE OF INTENSE THUNDERSTORMS...INCLUDING EMBEDDED
SUPERCELLS AND BOW ECHOES...IS DEVELOPING SOUTHEASTWARD INTO
SOUTHERN MO/NORTHWEST AR/EASTERN OK.  MODERATE INSTABILITY AND VERY
STRONG VERTICAL SHEAR PROFILES WILL MAINTAIN A RISK OF LARGE
HAIL...DAMAGING WINDS...AND A FEW TORNADOES THROUGH THE EVENING
HOURS.  PARAMETERS APPEAR FAVORABLE FOR A RISK OF ISOLATED STRONG
TORNADOES OVER WESTERN AR AND EASTERN OK.

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 24030.


...HART

Tornado Watches in Arkansas, 2008Tornado Watches in Missouri, 2008Tornado Watches in Oklahoma, 2008Every tornado watch in 2008

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.