Tornado Watch 482

Issued

Jun 7, 2008, 7:40 PM CDT (00:40 UTC)

Expired

Jun 8, 2008, 3:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

70 kt

The Des Moines radar (KDMX), 154 km from the middle of the area, began a volume at 00:44 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

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1268Jun 7, 6:34 PM CDT
• Mesoscale Discussion 1271Jun 7, 10:15 PM CDT
• Mesoscale Discussion 1273Jun 8, 2:29 AM CDT

000
WWUS20 KWNS 080043
SEL2  
SPC WW 080043
IAZ000-ILZ000-WIZ000-080800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 482
NWS STORM PREDICTION CENTER NORMAN OK
740 PM CDT SAT JUN 7 2008

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

       A LARGE PART OF IOWA
       PARTS OF NORTHERN ILLINOIS
       PARTS OF SOUTHERN WISCONSIN

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 740 PM
UNTIL 300 AM CDT.

TORNADOES...HAIL TO 2 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 NORTH AND SOUTH OF A LINE FROM 50 MILES SOUTHWEST OF FORT
DODGE IOWA TO 45 MILES NORTHEAST OF JANESVILLE WISCONSIN.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).

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 478...TORNADO WATCH NUMBER 479. WATCH NUMBER 478 479
WILL NOT BE IN EFFECT AFTER 740 PM CDT. CONTINUE...WW 480...WW
481...

DISCUSSION...WITH LOW LEVEL JET EXPECTED TO INCREASE TO 50-60KT AND
AVAILABILITY OF VERY MOIST AND UNSTABLE AIR...CONDITIONS EXPECTED TO
REMAIN FAVORABLE FOR SUPERCELLS MUCH OF THE NIGHT ACROSS THE WATCH
AREA.  ONGOING SEVERE WILL CONTINUE AND TRANSITION INTO ONE OR MORE
MCS/S WITH THREAT OF DAMAGING WINDS INCREASING. TORNADOS WILL BE
POSSIBLE WITH ANY SUPERCELL GIVEN THE HIGH CAPE AND SHEAR IN PLACE
IN THE WARM SECTOR.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
600. MEAN STORM MOTION VECTOR 24030.


...HALES

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