Tornado Watch 179

Issued

Apr 22, 2011, 3:34 PM CDT (20:34 UTC)

Expired

Apr 22, 2011, 10:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

60 kt

The Springfield radar (KSGF), 87 km from the middle of the area, began a volume at 20:34 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

70%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 516Apr 22, 1:04 PM CDT
• Mesoscale Discussion 518Apr 22, 1:23 PM CDT
• Mesoscale Discussion 520Apr 22, 5:21 PM CDT
• Mesoscale Discussion 521Apr 22, 5:27 PM CDT
• Mesoscale Discussion 526Apr 22, 9:20 PM CDT

629 
WWUS20 KWNS 222033
SEL9
SPC WW 222033
ILZ000-MOZ000-230300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 179
NWS STORM PREDICTION CENTER NORMAN OK
335 PM CDT FRI APR 22 2011

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

       WEST CENTRAL ILLINOIS
       CENTRAL AND SOUTHWEST MISSOURI

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 335 PM UNTIL
1000 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 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTHEAST OF MONETT
MISSOURI 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 178...

DISCUSSION...THUNDERSTORMS ARE EXPECTED TO INTENSIFY THIS AFTERNOON
ALONG AND AHEAD OF A SURFACE COLD FRONT OVER WESTERN MO.  THESE
STORMS WILL LIKELY BECOME SUPERCELLULAR AND SPREAD EASTWARD ACROSS
THE WATCH AREA.  LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THE
STRONGEST STORMS.  ALSO...STRENGTHENING LOW LEVEL WIND FIELDS
THROUGH THE EVENING WILL POSE A RISK OF A FEW TORNADOES.

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
500. MEAN STORM MOTION VECTOR 26035.


...HART

Tornado Watches in Missouri, 2011Tornado Watches in Illinois, 2011Every tornado watch in 2011

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.