Tornado Watch 41

Issued

Mar 1, 2007, 1:32 AM CST (07:32 UTC)

Expired

Mar 1, 2007, 8:00 AM CST

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

70 kt

The Springfield radar (KSGF), 111 km from the middle of the area, began a volume at 07:32 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

30%

Ten or more severe wind reports

40%

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

40%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 222Feb 28, 9:48 PM CST
• Mesoscale Discussion 224Feb 28, 10:57 PM CST

000
WWUS20 KWNS 010734
SEL1  
SPC WW 010734
ARZ000-KSZ000-MOZ000-OKZ000-011400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 41
NWS STORM PREDICTION CENTER NORMAN OK
135 AM CST THU MAR 1 2007

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

       NORTHWEST ARKANSAS
       EXTREME SOUTHEAST KANSAS
       SOUTHWEST MISSOURI
       EASTERN OKLAHOMA

EFFECTIVE THIS THURSDAY MORNING FROM 135 AM UNTIL 800 AM CST.

TORNADOES...HAIL TO 2.5 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 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 85 MILES NORTH OF SPRINGFIELD
MISSOURI TO 60 MILES SOUTH SOUTHEAST OF MCALESTER OKLAHOMA.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).

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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 36...TORNADO WATCH NUMBER 38. WATCH NUMBER 36 38
WILL NOT BE IN EFFECT AFTER 135 AM CST. CONTINUE...WW 37...WW
39...WW 40...

DISCUSSION...POWERFUL UPPER TROUGH AND STRENGTHENING COLD FRONT WILL
MOVE EAST INTO INCREASINGLY MOIST AND UNSTABLE WARM SECTOR FROM THE
RED RIVER NEWD ACROSS THE OZARKS THIS MORNING. IN ADDITION TO
INTENSIFYING FORCING FOR LARGE SCALE UPWARD MOTION...LOW THROUGH MID
LEVEL WIND FIELDS WILL STRENGTHEN CONSIDERABLY THROUGH THE EARLY
MORNING. THUS...ENVIRONMENT WILL BECOME CONDUCIVE TO SUPERCELLS AND
LINE SEGMENTS CAPABLE OF LARGE HAIL...HIGH WINDS...AND A COUPLE OF
TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
400. MEAN STORM MOTION VECTOR 22045.


...CARBIN/HART

Tornado Watches in Missouri, 2007Tornado Watches in Oklahoma, 2007Tornado Watches in Arkansas, 2007Every tornado watch in 2007

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.