Tornado Watch 358

Issued

Jun 7, 2007, 11:34 AM CDT (16:34 UTC)

Expired

Jun 7, 2007, 10:00 PM CDT

In force

10 hr

Issued by

the Storm Prediction Center

Particularly dangerous situation

Yes

Largest hail expected

2.5 in

Strongest gust expected

70 kt

The La Crosse radar (KARX), 80 km from the middle of the area, began a volume at 16:36 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

90%

One or more EF2 to EF5 tornadoes

50%

Ten or more severe wind reports

90%

One or more gusts of 65 knots or more

60%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1036Jun 7, 9:11 AM CDT
• Mesoscale Discussion 1042Jun 7, 3:38 PM CDT
• Mesoscale Discussion 1044Jun 7, 5:22 PM CDT
• Mesoscale Discussion 1049Jun 7, 9:23 PM CDT

000
WWUS20 KWNS 071636
SEL8  
SPC WW 071636
IAZ000-ILZ000-MIZ000-MNZ000-WIZ000-LSZ000-080300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 358
NWS STORM PREDICTION CENTER NORMAN OK
1135 AM CDT THU JUN 7 2007

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

       MUCH OF CENTRAL AND EASTERN IOWA
       SMALL PART OF NORTHWEST ILLINOIS
       PART OF WESTERN UPPER MICHIGAN
       PARTS OF SOUTHEASTERN MINNESOTA
       MUCH OF WESTERN AND NORTHERN WISCONSIN
       LAKE SUPERIOR

EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1135 AM UNTIL
1000 PM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

DESTRUCTIVE TORNADOES...LARGE HAIL TO 2.5 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 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF
KENNEDY WISCONSIN TO 45 MILES SOUTH SOUTHWEST OF OTTUMWA IOWA. 
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...CONTINUE...WW 357...

DISCUSSION...VERY STRONG SHEAR PROFILES IN PLACE ACROSS WATCH WITH
APPROACH OF VIGOROUS UPPER TROUGH AND DEEP SURFACE LOW.  AIR MASS
HAS BECOME STRONGLY UNSTABLE AND WEAKLY CAPPED.  SUPERCELL
THUNDERSTORMS WILL DEVELOP RAPIDLY ALONG W EDGE OF WATCH WHERE
MOISTURE/INSTABILITY GRADIENT LOCATED.  POTENTIAL EXISTS FOR
STRONG/LONG LIVED TORNADOES TO DEVELOP BY MID AFTERNOON ALONG WITH
VERY DAMAGING WINDS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 24050.


...HALES

Tornado Watches in Iowa, 2007Tornado Watches in Wisconsin, 2007Tornado Watches in Minnesota, 2007Every tornado watch in 2007

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.