Tornado Watch 174

Issued

Apr 24, 2007, 11:49 AM CDT (16:49 UTC)

Expired

Apr 24, 2007, 10:38 PM CDT

In force

11 hr

Issued by

the Storm Prediction Center

Largest hail expected

3.5 in

Strongest gust expected

60 kt

The Dyess AFB radar (KDYX), 44 km from the middle of the area, began a volume at 16:52 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

95%

One or more EF2 to EF5 tornadoes

50%

Ten or more severe wind reports

90%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

95%

One or more hailstones of 2 inches or more

80%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 559Apr 24, 11:28 AM CDT
• Mesoscale Discussion 560Apr 24, 12:40 PM CDT
• Mesoscale Discussion 569Apr 24, 6:44 PM CDT
• Mesoscale Discussion 570Apr 24, 7:33 PM CDT
• Mesoscale Discussion 573Apr 24, 10:07 PM CDT

000
WWUS20 KWNS 241651
SEL4  
SPC WW 241651
TXZ000-250100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 174
NWS STORM PREDICTION CENTER NORMAN OK
1150 AM CDT TUE APR 24 2007

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

       NORTHERN AND CENTRAL TEXAS

EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1150 AM UNTIL 800
PM CDT.

TORNADOES...HAIL TO 3.5 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 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES WEST NORTHWEST OF
SHERMAN TEXAS TO 40 MILES WEST SOUTHWEST OF JUNCTION TEXAS.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).

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 172...WW 173...

DISCUSSION...TSTMS EXPECTED TO INCREASE ALONG MERGING PACIFIC
FRONT/DRY LINE IN WRN PART OF WW...WHERE DEEP SHEAR WILL INCREASE
WITH CONTINUED ENE MOTION OF FAR W TX UPR DISTURBANCE.  BANDS OF
SEMI-DISCRETE...FAST- MOVING SUPERCELLS WILL POSE A SERIOUS THREAT
FOR VERY LARGE HAIL...HIGH WIND AND A FEW TORNADOES AS HEATING AND
RICH MOISTURE INFLOW CONTINUE ACROSS AREA.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 23040.


...CORFIDI

Tornado 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.