Severe Thunderstorm Watch 331

Issued

Jul 5, 2016, 9:50 PM CDT (02:50 UTC)

Expired

Jul 6, 2016, 5:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

70 kt

The La Crosse radar (KARX), 100 km from the middle of the area, began a volume at 02:50 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

20%

One or more EF2 to EF5 tornadoes

10%

Ten or more severe wind reports

90%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1154Jul 5, 8:38 PM CDT
• Mesoscale Discussion 1157Jul 5, 10:46 PM CDT
• Mesoscale Discussion 1159Jul 6, 1:27 AM CDT

538 
WWUS20 KWNS 060248
SEL1  
SPC WW 060248
IAZ000-ILZ000-WIZ000-061000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 331
NWS STORM PREDICTION CENTER NORMAN OK
950 PM CDT TUE JUL 5 2016

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
  EASTERN IOWA
  NORTHERN ILLINOIS
  CENTRAL AND SOUTHERN WISCONSIN

* EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 950 PM
  UNTIL 500 AM CDT.

* PRIMARY THREATS INCLUDE...
  WIDESPREAD DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS
    TO 80 MPH POSSIBLE
  A TORNADO OR TWO POSSIBLE

SUMMARY...A FAST-MOVING CONVECTIVE LINE WILL CONTINUE TO MOVE
SOUTHEASTWARD ACROSS MUCH OF CENTRAL AND SOUTHERN WISCONSIN AND FAR
NORTHEAST IOWA...WHILE EVENTUALLY REACHING NORTHERN ILLINOIS AND
ADDITIONAL PORTIONS OF EASTERN IOWA DURING THE OVERNIGHT. WIDESPREAD
DAMAGING WINDS ARE A SIGNIFICANT CONCERN...WHILE A LINE-EMBEDDED
TORNADO OR TWO MAY ALSO OCCUR.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES EAST
NORTHEAST OF MADISON WISCONSIN TO 75 MILES NORTH NORTHWEST OF
CEDAR RAPIDS IOWA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 324...WW 326...WW
328...WW 329...WW 330...

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 31045.


...GUYER

Severe Thunderstorm Watches in Wisconsin, 2016Severe Thunderstorm Watches in Iowa, 2016Severe Thunderstorm Watches in Illinois, 2016Every severe thunderstorm watch in 2016

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.