Tornado Watch 132

Issued

Apr 30, 2004, 12:45 PM CDT (17:45 UTC)

Expired

Apr 30, 2004, 9:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

The Dallas/Ft Worth radar (KFWS), 107 km from the middle of the area, began a volume at 17:47 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.

• Mesoscale Discussion 512Apr 30, 12:01 PM CDT
• Mesoscale Discussion 515Apr 30, 2:40 PM CDT
• Mesoscale Discussion 519Apr 30, 5:53 PM CDT
• Mesoscale Discussion 522Apr 30, 7:06 PM CDT
• Mesoscale Discussion 525Apr 30, 8:14 PM CDT

000 
WWUS20 KWNS 301748
SEL2  
SPC WW 301745
OKZ000-TXZ000-010200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 132
NWS STORM PREDICTION CENTER NORMAN OK
1245 PM CDT FRI APR 30 2004

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

       SOUTHERN OKLAHOMA
       NORTHWEST AND NORTH CENTRAL TEXAS

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 1245 PM UNTIL 900
PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 85 STATUTE MILES EAST AND WEST
OF A LINE FROM ARDMORE OKLAHOMA TO 35 MILES SOUTHWEST OF MINERAL
WELLS TEXAS.

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.

DISCUSSION...STRONG INSTABILITY IS DEVELOPING OVER NW/N CENTRAL TX
AND SRN OK TO THE E OF A COLD FRONT AND S OF AN OUTFLOW BOUNDARY
FROM OVERNIGHT STORMS IN OK.  VERTICAL SHEAR IS ALREADY SUFFICIENT
FOR SUPERCELLS ACROSS THIS AREA...AND LOCAL PROFILERS SUGGEST MID
LEVEL FLOW WILL GRADUALLY INCREASE BY LATE AFTERNOON FROM NW INTO N
CENTRAL TX.  EXPECT SUPERCELLS TO DEVELOP AND MOVE EWD ALONG THE
OUTFLOW BOUNDARY NEAR THE RED RIVER...WHERE ENHANCED LOW-LEVEL SHEAR
AND RICH MOISTURE COULD SUPPORT A COUPLE OF TORNADOES. OTHERWISE...
ADDITIONAL STORM DEVELOPMENT IS EXPECTED ALONG THE COLD FRONT IN NW
TX...AT THE TRIPLE POINT NW OF ABI...AND PERHAPS INTO THE WARM
SECTOR AS THE BOUNDARY LAYER DESTABILIZES.  VERY LARGE HAIL WILL BE
THE MAIN SEVERE THREAT WITH MOST STORMS...ALONG WITH THE POTENTIAL
FOR DAMAGING WINDS AND AN ISOLATED TORNADO THROUGH THIS EVENING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 27020.


...THOMPSON

341,0953 322,0970 322,0995 341,0983

Tornado Watches in Texas, 2004Tornado Watches in Oklahoma, 2004Every tornado watch in 2004

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.