Tornado Watch 458

Issued

Jun 5, 2008, 4:59 AM CDT (09:59 UTC)

Expired

Jun 5, 2008, 11:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Quad Cities radar (KDVN), 49 km from the middle of the area, began a volume at 10:03 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

30%

One or more EF2 to EF5 tornadoes

10%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

5%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

40%

• Mesoscale Discussion 1216Jun 5, 1:38 AM CDT
• Mesoscale Discussion 1218Jun 5, 4:11 AM CDT
• Mesoscale Discussion 1220Jun 5, 6:46 AM CDT

000
WWUS20 KWNS 051002
SEL8  
SPC WW 051002
IAZ000-ILZ000-WIZ000-LMZ000-051600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 458
NWS STORM PREDICTION CENTER NORMAN OK
500 AM CDT THU JUN 5 2008

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

       EASTERN IOWA
       NORTHWEST ILLINOIS
       SOUTHERN WISCONSIN
       LAKE MICHIGAN

EFFECTIVE THIS THURSDAY MORNING FROM 500 AM UNTIL 1100 AM CDT.

TORNADOES...HAIL TO 1 INCH 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 EAST AND WEST OF A LINE FROM 50 MILES EAST SOUTHEAST OF
OTTUMWA IOWA TO 60 MILES NORTH OF MILWAUKEE WISCONSIN.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU8).

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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 457. WATCH NUMBER 457 WILL NOT BE IN EFFECT AFTER
500 AM CDT. 

DISCUSSION...LONG-LIVED...BROADLY-ROTATING STORM CLUSTERS SHOULD
PERSIST IN AREA OF SUSTAINED WAA ALONG AND ATOP STALLING OUTFLOW
BOUNDARY FROM ERN IA NEWD INTO WI.  QUALITY OF MOISTURE
INFLOW...COUPLED WITH MODERATE LOW-LVL SPEED/DIRECTIONAL
SHEAR...SUGGESTS POTENTIAL FOR A TORNADO OR TWO...IN ADDITION TO
LOCALLY DMGG OUTFLOW WINDS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24030.


...CORFIDI

Tornado Watches in Wisconsin, 2008Tornado Watches in Iowa, 2008Tornado Watches in Illinois, 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.