Tornado Watch 524

Issued

Jun 20, 2011, 3:08 PM CDT (20:08 UTC)

Expired

Jun 20, 2011, 10:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

70 kt

The Topeka radar (KTWX), 126 km from the middle of the area, began a volume at 19:56 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

20%

Ten or more severe wind reports

90%

One or more gusts of 65 knots or more

90%

Ten or more severe hail reports

90%

One or more hailstones of 2 inches or more

80%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1320Jun 20, 1:34 PM CDT
• Mesoscale Discussion 1328Jun 20, 5:55 PM CDT
• Mesoscale Discussion 1329Jun 20, 6:17 PM CDT
• Mesoscale Discussion 1331Jun 20, 7:46 PM CDT
• Mesoscale Discussion 1333Jun 20, 9:02 PM CDT

456 
WWUS20 KWNS 202010
SEL4  
SPC WW 202010
IAZ000-KSZ000-MOZ000-NEZ000-210300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 524
NWS STORM PREDICTION CENTER NORMAN OK
310 PM CDT MON JUN 20 2011

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

       PARTS OF SOUTHWEST IOWA
       MUCH OF EASTERN KANSAS
       SMALL PART OF NORTHWEST MISSOURI
       PARTS OF SOUTHEAST NEBRASKA

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 310 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF
TEKAMAH NEBRASKA TO 45 MILES SOUTH SOUTHEAST OF WICHITA KANSAS. 
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).

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 523...

DISCUSSION...THUNDERSTORMS WILL ERUPT ALONG THE DRY LINE AS CAP HAS
ABOUT ERODED WITH THE ASCENT FROM THE APPROACHING STRONG TROUGH.
WITH MLCAPES AOA 2500 J/KG AND 50-60KT OF SHEAR...SUPERCELLS WILL BE
THE INITIAL MODE WHICH INCLUDES A VERY LARGE HAIL AND DAMAGING WIND
THREAT.  TORNADOS ARE ALSO POSSIBLE WITH ANY SUPERCELL. STORMS WILL
GROW UPSCALE LATER THIS AFTERNOON WITH POTENTIAL INCREASING FOR A
SIGNIFICANT DAMAGING WIND THREAT.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 24035.


...HALES

Tornado Watches in Kansas, 2011Tornado Watches in Nebraska, 2011Tornado Watches in Iowa, 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.