Tornado Watch 474

Issued

Jun 6, 2008, 1:05 PM CDT (18:05 UTC)

Expired

Jun 6, 2008, 6:00 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Milwaukee radar (KMKX), 62 km from the middle of the area, began a volume at 18:04 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

70%

• Mesoscale Discussion 1250Jun 6, 10:50 AM CDT

000
WWUS20 KWNS 061803
SEL4  
SPC WW 061803
ILZ000-INZ000-WIZ000-LMZ000-062300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 474
NWS STORM PREDICTION CENTER NORMAN OK
105 PM CDT FRI JUN 6 2008

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

       NORTHEAST ILLINOIS
       NORTHWEST INDIANA
       SOUTHEAST WISCONSIN
       LAKE MICHIGAN

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 105 PM UNTIL 600
PM 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 45 STATUTE
MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH OF MILWAUKEE
WISCONSIN TO 75 MILES SOUTH SOUTHEAST OF MARSEILLES ILLINOIS. 
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 472...WW 473...

DISCUSSION...ISOLATED AND DISCRETE THUNDERSTORMS ARE DEVELOPING OVER
SOUTHEAST WI AND NORTHEAST IL...IN REGION OF MODERATE INSTABILITY
AND STRONG LOW/DEEP LAYER VERTICAL SHEAR.  SUPERCELLS ARE EXPECTED
THAT WILL TRACK NORTHEASTWARD INTO LAKE MI DURING THE AFTERNOON. 
THREAT OF HAIL AND DAMAGING WINDS WILL INCREASE WITH STORMS AS THEY
MOVE EASTWARD...AS WELL AS A RISK OF ISOLATED TORNADOES.

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
500. MEAN STORM MOTION VECTOR 24035.


...HART

Tornado Watches in Illinois, 2008Tornado Watches in Wisconsin, 2008Tornado Watches in Indiana, 2008Every tornado watch in 2008

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.