Tornado Watch 176

Issued

Apr 24, 2007, 2:40 PM CDT (19:40 UTC)

Expired

Apr 24, 2007, 10:38 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Dallas/Ft Worth radar (KFWS), 170 km from the middle of the area, began a volume at 19:41 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

70%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

95%

• 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 241941
SEL6  
SPC WW 241941
ARZ000-OKZ000-TXZ000-250400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 176
NWS STORM PREDICTION CENTER NORMAN OK
240 PM CDT TUE APR 24 2007

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

       SOUTHWEST ARKANSAS
       SOUTHEAST OKLAHOMA
       NORTHEAST TEXAS

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 240 PM UNTIL
1100 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 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF
TEXARKANA ARKANSAS TO 5 MILES SOUTH SOUTHWEST OF CORSICANA TEXAS.
 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).

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...WW
174...WW 175...

DISCUSSION...SLIGHTLY ELEVATED TSTMS/POSSIBLE SUPERCELLS EXPECTED TO
INCREASE IN COVERAGE AND POSSIBLY BUILD DOWN INTO THE BOUNDARY LAYER
AS HEATING FURTHER DESTABILIZES REGION.  ADDITIONAL STORMS MAY MOVE
INTO WW THIS EVENING AS ACTIVITY PROPAGATES E FROM CNTRL TX. 
STRENGTHENING/ VEERING WIND PROFILES AND RICH BOUNDARY LAYER
MOISTURE SUGGEST GOOD CHANCE FOR TORNADOES IN ADDITION TO HAIL/HIGH
WIND.

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
500. MEAN STORM MOTION VECTOR 23040.


...CORFIDI

Tornado Watches in Texas, 2007Tornado Watches in Arkansas, 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.