Tornado Watch 173

Issued

Apr 24, 2007, 11:23 AM CDT (16:23 UTC)

Expired

Apr 24, 2007, 8:00 PM CDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

60 kt

The Norman radar (KTLX), 67 km from the middle of the area, began a volume at 16:27 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

90%

One or more EF2 to EF5 tornadoes

50%

Ten or more severe wind reports

80%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

95%

One or more hailstones of 2 inches or more

70%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 558Apr 24, 10:04 AM CDT
• Mesoscale Discussion 559Apr 24, 11:28 AM CDT
• Mesoscale Discussion 560Apr 24, 12:40 PM CDT
• Mesoscale Discussion 566Apr 24, 3:37 PM CDT
• Mesoscale Discussion 568Apr 24, 6:16 PM CDT

000
WWUS20 KWNS 241624
SEL3  
SPC WW 241624
OKZ000-TXZ000-250100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 173
NWS STORM PREDICTION CENTER NORMAN OK
1125 AM CDT TUE APR 24 2007

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

       A LARGE PART OF OKLAHOMA
       WESTERN NORTH TEXAS

EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1125 AM UNTIL 800
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 APPROXIMATELY ALONG AND 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF PONCA
CITY OKLAHOMA TO 35 MILES SOUTHWEST OF ARDMORE OKLAHOMA.  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 172...

DISCUSSION...TSTMS/SUPERCELLS EXPECTED TO FORM/INTENSIFY ALONG
MERGING PACIFIC FRONT/DRY LINE.  INITIAL ACTIVITY MAY BE SLIGHTLY
ELEVATED ABOVE FRONTAL SURFACE.  BUT COMBINATION OF SFC
HEATING...STRENGTHENING DEEP SHEAR WITH CONTINUED ENE MOTION OF FAR
W TX UPR DISTURBANCE AND QUALITY MOISTURE INFLOW SUGGEST HIGH
LIKELIHOOD FOR VERY LARGE HAIL...A FEW TORNADOES AND DAMAGING WIND.

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 22045.


...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.