Tornado Watch 313

Issued

May 31, 2007, 2:29 PM MDT (20:29 UTC)

Expired

May 31, 2007, 9:00 PM MDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Amarillo radar (KAMA), 161 km from the middle of the area, began a volume at 20:32 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

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 933May 31, 11:33 AM MDT
• Mesoscale Discussion 937May 31, 2:28 PM MDT
• Mesoscale Discussion 939May 31, 5:38 PM MDT
• Mesoscale Discussion 941May 31, 8:07 PM MDT

000
WWUS20 KWNS 312030
SEL3  
SPC WW 312030
COZ000-KSZ000-OKZ000-TXZ000-010300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 313
NWS STORM PREDICTION CENTER NORMAN OK
330 PM CDT THU MAY 31 2007

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

       SOUTHEAST COLORADO
       SOUTHWEST KANSAS
       OKLAHOMA PANHANDLE
       TEXAS PANHANDLE

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 330 PM UNTIL
1000 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 90 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST NORTHWEST OF
DALHART TEXAS TO 60 MILES EAST SOUTHEAST OF LIBERAL KANSAS.  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 312...

DISCUSSION...STRONG/SEVERE STORMS CONTINUE TO DEVELOP/INTENSITY
ALONG LEE TROUGH/DRYLINE OVER SERN CO INTO NERN NM.  AIR MASS IS
QUITE UNSTABLE SOUTH OF A BOUNDARY THAT EXTENDS FROM SERN CO ESEWD
ACROSS NRN OK WHERE MLCAPE IS 1000-2500 J/KG.  LOOKS LIKE THIS
ACTIVITY WILL MOVE INTO SWRN KS...INTO THE OK/TX PANHANDLES BEFORE
LOW LEVEL JET INCREASES THIS EVENING RESULTING IN MORE WIDESPREAD
ACTIVITY.  ANALYSIS ALSO SHOWS DEEP LAYER SHEAR OF 45-55 KT ACROSS
THIS REGION ALONG THE BOUNDARY FOR THE SUPPORT OF STRONG
UPDRAFTS/ROTATING STORMS.

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
450. MEAN STORM MOTION VECTOR 27030.


...MCCARTHY

Tornado Watches in Kansas, 2007Tornado Watches in Texas, 2007Tornado Watches in Oklahoma, 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.