Tornado Watch 6

Issued

Jan 29, 2013, 7:26 AM CST (13:26 UTC)

Expired

Jan 29, 2013, 5:29 PM CST

In force

10 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Tulsa radar (KINX), 77 km from the middle of the area, began a volume at 13:26 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

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 67Jan 29, 5:41 AM CST
• Mesoscale Discussion 68Jan 29, 9:46 AM CST
• Mesoscale Discussion 70Jan 29, 11:05 AM CST
• Mesoscale Discussion 71Jan 29, 11:54 AM CST
• Mesoscale Discussion 72Jan 29, 1:19 PM CST
• Mesoscale Discussion 73Jan 29, 2:15 PM CST
• Mesoscale Discussion 74Jan 29, 3:31 PM CST

873 
WWUS20 KWNS 291328
SEL6  
SPC WW 291328
ARZ000-KSZ000-MOZ000-OKZ000-292100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 6
NWS STORM PREDICTION CENTER NORMAN OK
725 AM CST TUE JAN 29 2013

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

       NORTHWEST ARKANSAS
       EASTERN KANSAS
       WEST-CENTRAL AND SOUTHWEST MISSOURI
       NORTHEAST OKLAHOMA

EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 725 AM UNTIL
300 PM CST.

TORNADOES...HAIL TO 1 INCH 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 30 MILES SOUTHWEST OF MUSKOGEE
OKLAHOMA TO 15 MILES NORTH NORTHWEST OF KNOB NOSTER MISSOURI. 
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 5...

DISCUSSION...A COMPLEX SCENARIO IS UNFOLDING THIS MORNING INVOLVING
A LONG-LIVED BOWING LINE SEGMENT AND INCREASING TSTM DEVELOPMENT
ALONG A COLD FRONT ADVANCING SEWD INTO THE WATCH AREA.  CURRENT
THINKING IS THAT THE LINE SEGMENT WILL EVENTUALLY MERGE WITH THE
FRONTAL CONVECTION...RESULTING IN A LARGER-SCALE QLCS WHICH WILL
MOVE RAPIDLY INTO THE OZARK PLATEAU.  12Z OBSERVED SOUNDINGS
INDICATE THAT THE AMBIENT ENVIRONMENT IS ONLY WEAKLY UNSTABLE WITH
MLCAPE OF 500-1000 J/KG.  HOWEVER...GIVEN AN INCREASE IN LARGE-SCALE
FORCING FOR ASCENT AND STRONG LOW-LEVEL AND DEEP-LAYER SHEAR...THE
SETUP WILL BE SUPPORTIVE OF EMBEDDED LEWP STRUCTURES CAPABLE OF
DAMAGING WINDS AND TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 23045.


...MEAD

Tornado Watches in Missouri, 2013Tornado Watches in Oklahoma, 2013Tornado Watches in Kansas, 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.