Tornado Watch 7

Issued

Jan 29, 2013, 10:59 AM CST (16:59 UTC)

Expired

Jan 29, 2013, 6:33 PM CST

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

65 kt

The Western Arkansas radar (KSRX), 158 km from the middle of the area, began a volume at 17:00 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

60%

One or more EF2 to EF5 tornadoes

30%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 68Jan 29, 9:46 AM CST
• Mesoscale Discussion 69Jan 29, 10:37 AM CST
• Mesoscale Discussion 73Jan 29, 2:15 PM CST
• Mesoscale Discussion 74Jan 29, 3:31 PM CST
• Mesoscale Discussion 77Jan 29, 4:58 PM CST
• Mesoscale Discussion 78Jan 29, 5:51 PM CST

745 
WWUS20 KWNS 291703
SEL7  
SPC WW 291703
ARZ000-OKZ000-TXZ000-300100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 7
NWS STORM PREDICTION CENTER NORMAN OK
1100 AM CST TUE JAN 29 2013

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

       WESTERN ARKANSAS
       SOUTHEAST OKLAHOMA
       NORTHEAST TEXAS

EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1100 AM UNTIL 700
PM CST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 75 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 35 MILES NORTHWEST OF POTEAU
OKLAHOMA TO 80 MILES SOUTH OF PARIS TEXAS.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU7).

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 5...WW 6...

DISCUSSION...A BAND OF PRE-FRONTAL ASCENT OVERSPREADING NE TX/SE OK
WILL SUPPORT NEW THUNDERSTORM DEVELOPMENT THROUGH THIS AFTERNOON
WITHIN THE UNSTABLE WARM SECTOR.  THOUGH CLOUDS ARE LIMITING SURFACE
HEATING...DEWPOINTS IN THE MID 60S AND REMNANT STEEP MIDLEVEL LAPSE
RATES WILL DRIVE MLCAPE TO THE 750-1500 J/KG RANGE BY EARLY-MID
AFTERNOON.  VERTICAL SHEAR IS FAVORABLE FOR SUPERCELLS AND BOWING
SEGMENTS ACROSS THE WATCH AREA...AND THIS WILL SUPPORT A RISK FOR
TORNADOES...DAMAGING WINDS...AND AT LEAST ISOLATED LARGE HAIL
THROUGH THIS EVENING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 23045.


...THOMPSON

Tornado Watches in Texas, 2013Tornado Watches in Oklahoma, 2013Tornado Watches in Arkansas, 2013Every tornado watch in 2013

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.