Tornado Watch 423

Issued

Jun 3, 2011, 5:10 PM CDT (22:10 UTC)

In effect from

Jun 3, 2011, 5:15 PM CDT

Expired

Jun 4, 2011, 12:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The La Crosse radar (KARX), 146 km from the middle of the area, began a volume at 22:12 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

50%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1078Jun 3, 3:33 PM CDT
• Mesoscale Discussion 1083Jun 3, 9:07 PM CDT

455 
WWUS20 KWNS 032214
SEL3
SPC WW 032214
WIZ000-040500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 423
NWS STORM PREDICTION CENTER NORMAN OK
515 PM CDT FRI JUN 3 2011

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

       NORTHERN AND CENTRAL WISCONSIN

EFFECTIVE THIS FRIDAY AFTERNOON FROM 515 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 2 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 65 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 20 MILES WEST SOUTHWEST OF
EAU CLAIRE WISCONSIN TO 30 MILES EAST NORTHEAST OF GREEN BAY
WISCONSIN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

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.

DISCUSSION...STORM INITIATION HAS RECENTLY OCCURRED WSW EAU ON THE
NRN EDGE OF LOW-LEVEL THERMAL AXIS WHERE TEMPERATURES HAS WARMED
INTO THE LOW/MID 90S.  OBJECTIVE GUIDANCE SUGGESTS THAT A CAP EXISTS
ACROSS DOWNSTREAM WARM SECTOR...THOUGH IT APPEARS THAT THE STRONG
DIABATIC HEATING MAY BE SUFFICIENT TO SUSTAIN ISOLATED STORMS PRIOR
TO 00Z.  AMBIENT ENVIRONMENT IS RATHER MOIST WITH DEWPOINTS IN THE
MID/UPPER 60S...RESULTING IN MLCAPE OF 2500-3500 J/KG.  AREA
PROFILER/VWP DATA INDICATE VERTICALLY VEERING WIND PROFILES WITH
SUFFICIENT LOW AND DEEP-LAYER SHEAR TO SUPPORT SUPERCELLS CAPABLE OF
TORNADOES...LARGE HAIL AND DAMAGING WIND GUSTS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 26030.


...MEAD

Tornado Watches in Wisconsin, 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.