Tornado Watch 9

Issued

Jan 29, 2013, 12:35 PM CST (18:35 UTC)

Expired

Jan 29, 2013, 8:00 PM CST

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

65 kt

The Springfield radar (KSGF), 88 km from the middle of the area, began a volume at 18:35 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

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 71Jan 29, 11:54 AM CST
• Mesoscale Discussion 72Jan 29, 1:19 PM CST
• Mesoscale Discussion 74Jan 29, 3:31 PM CST
• Mesoscale Discussion 77Jan 29, 4:58 PM CST
• Mesoscale Discussion 79Jan 29, 6:08 PM CST

543 
WWUS20 KWNS 291836
SEL9  
SPC WW 291836
ARZ000-ILZ000-MOZ000-300200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 9
NWS STORM PREDICTION CENTER NORMAN OK
1235 PM CST TUE JAN 29 2013

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

       NORTH CENTRAL ARKANSAS
       WEST CENTRAL ILLINOIS
       SOUTH CENTRAL AND EAST CENTRAL MISSOURI

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1235 PM UNTIL
800 PM CST.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 75 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 60 MILES SOUTH OF HARRISON
ARKANSAS TO 55 MILES NORTH NORTHWEST OF SAINT LOUIS MISSOURI. 
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 6...WW 7...WW 8...

DISCUSSION...A COLD FRONTAL SQUALL LINE WILL CONTINUE TO MOVE EWD
ACROSS CENTRAL MO THROUGH THE AFTERNOON...WHILE ADDITIONAL STORMS
FORM AHEAD OF THE FRONT FROM NW AR INTO SRN MO.  THOUGH INSTABILITY
WILL REMAIN SOMEWHAT LIMITED THROUGH THE AFTERNOON...VERY STRONG
VERTICAL SHEAR WILL PROMOTE BOTH EMBEDDED BOWING SEGMENTS AND SOME
SUPERCELL STRUCTURES...WITH AN ATTENDANT RISK FOR DAMAGING WINDS AND
A FEW TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400.
MEAN STORM MOTION VECTOR 24050.


...THOMPSON

Tornado Watches in Missouri, 2013Tornado Watches in Arkansas, 2013Tornado Watches in Illinois, 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.