Tornado Watch 261

Issued

May 8, 2007, 7:54 PM CDT (00:54 UTC)

Expired

May 9, 2007, 12:00 AM CDT

In force

4 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Norman radar (KTLX), 55 km from the middle of the area, began a volume at 00:54 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

30%

One or more EF2 to EF5 tornadoes

10%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 757May 8, 7:30 PM CDT
• Mesoscale Discussion 758May 8, 10:08 PM CDT

000
WWUS20 KWNS 090100
SEL1  
SPC WW 090100
OKZ000-TXZ000-090500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 261
NWS STORM PREDICTION CENTER NORMAN OK
755 PM CDT TUE MAY 8 2007

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

       SOUTHERN AND CENTRAL OKLAHOMA
       NORTH TEXAS

EFFECTIVE THIS TUESDAY NIGHT FROM 755 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHWEST OF CHANDLER
OKLAHOMA TO 30 MILES SOUTH SOUTHEAST OF SHERMAN TEXAS.  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...CONTINUE...WW 258...WW 259...WW 260...

DISCUSSION...MCV OVER NW TX HAS STRENGTHENED LARGER SCALE WIND FIELD
ACROSS THE RED RVR VLY REGION.  BACKED LOWER LEVEL FLOW DOWNSTREAM
ACROSS CNTRL OK...AND PRESENCE OF WEAK OUTFLOW BOUNDARIES THAT HAVE
BEEN DRAWN INTO THE MCV CIRCULATION...MAY CONTINUE TO ENHANCE
POTENTIAL FOR LOW LEVEL STORM ROTATION/BRIEF TORNADOES GIVEN MOIST
LOW LEVEL ENVIRONMENT.  FARTHER S...A SPIN-UP TORNADO AND/OR STRONG
WIND GUSTS MAY PERSIST ALONG ASSOCIATED BOW ACROSS THE RED RVR INTO
S CNTRL OK.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.
MEAN STORM MOTION VECTOR 24035.


...CORFIDI

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