Tornado Watch 800

Issued

Aug 23, 2011, 5:19 PM CDT (22:19 UTC)

Expired

Aug 23, 2011, 11:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Green Bay radar (KGRB), 100 km from the middle of the area, began a volume at 22:21 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

80%

• Mesoscale Discussion 2044Aug 23, 4:56 PM CDT
• Mesoscale Discussion 2046Aug 23, 8:45 PM CDT

386 
WWUS20 KWNS 232217
SEL0
SPC WW 232217
WIZ000-LMZ000-240300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 800
NWS STORM PREDICTION CENTER NORMAN OK
520 PM CDT TUE AUG 23 2011

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

       CENTRAL WI WISCONSIN
       LAKE MICHIGAN

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 520 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 2.5 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 50 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST NORTHWEST OF
CAMP DOUGLAS WISCONSIN TO 25 MILES EAST OF MANITOWOC WISCONSIN.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).

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...SCATTERED THUNDERSTORMS CONTINUE TO INCREASE IN
COVERAGE OVER CENTRAL WI.  THESE STORMS ARE EXPECTED TO TRACK
SOUTHEASTWARD ACROSS THE WATCH AREA THROUGH THE EVENING.
STRENGTHENING LOW LEVEL WIND FIELDS AND FAVORABLE MID LEVEL FLOW
SUGGEST THE RISK OF SUPERCELLS CAPABLE OF VERY LARGE HAIL...DAMAGING
WINDS...AND AN ISOLATED TORNADO OR TWO.  THE MAIN UNCERTAINTY
REGARDING THE WIND/TORNADO THREAT WILL INVOLVE THE PERSISTENT LOW
CLOUDS AND EXTENT OF REMAINING CAP.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 30030.


...HART

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.