Thunderstorms moving along a warm front encountered very unstable air across central Wisconsin where they produced damaging winds, hail and flash flooding.  Portage County was hardest hit, with flash flooding and a large swath of wind damage from north of Stevens Point to around Whiting.

Flash Flood in MARATHON, WISCONSIN
From 19-JUL-11 19:47:00 to 19-JUL-11 22:52:00 (CST-6)
Location: ABBOTSFORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms produced torrential rainfall in western Marathon County, resulting in flash flooding.  Water, 8 to 10 inches deep, was flowing over State Highway 13.

Thunderstorm Wind in PORTAGE, WISCONSIN
From 19-JUL-11 20:50:00 to 19-JUL-11 20:52:00 (CST-6)
Location: JUNCTION CITY
Magnitude: 50.00 EG
Reported by: Law Enforcement

Thunderstorm winds downed trees in Junction City.

Thunderstorm Wind in PORTAGE, WISCONSIN
From 19-JUL-11 21:15:00 to 19-JUL-11 21:15:00 (CST-6)
Location: PLOVER
Magnitude: 50.00 EG
Reported by: COOP Observer

Thunderstorm winds caused damage as the storm moved through the Plover area.  It downed a light pole at the intersection of Hover Street and CR-B and a large tree limb on the south end of town.

Thunderstorm Wind in WOOD, WISCONSIN
From 19-JUL-11 21:30:00 to 19-JUL-11 21:30:00 (CST-6)
Location: RUDOLPH
Magnitude: 52.00 EG
Reported by: Trained Spotter

A spotter in Rudolph estimated a thunderstorm wind gust of 60 mph.  The storm also produced penny size hail.

Hail in WOOD, WISCONSIN
From 19-JUL-11 21:30:00 to 19-JUL-11 21:30:00 (CST-6)
Location: RUDOLPH
Magnitude: 0.75 
Reported by: Trained Spotter

Penny size hail fell with a thunderstorm that also produced a wind gust to 60 mph.

Heavy Rain in PORTAGE, WISCONSIN
From 19-JUL-11 20:55:00 to 19-JUL-11 21:15:00 (CST-6)
Location: PLOVER
Reported by: COOP Observer

Thunderstorms that produced wind damage in Plover also dropped 1.22 inches of rain in just 20 minutes.

Thunderstorm Wind in MARATHON, WISCONSIN
From 19-JUL-11 19:15:00 to 19-JUL-11 19:15:00 (CST-6)
Location: SPENCER
Magnitude: 55.00 EG
Reported by: Amateur Radio

Thunderstorm winds snapped a few trees down in Spencer.

Flash Flood in WOOD, WISCONSIN
From 19-JUL-11 20:30:00 to 19-JUL-11 23:30:00 (CST-6)
Location: MARSHFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Marshfield Municipal Airport recorded 3.09 inches of rain from 8 PM CST to 930 PM CST.  The heavy rainfall caused water to flow across numerous roads in the area.

Flash Flood in PORTAGE, WISCONSIN
From 19-JUL-11 20:55:00 to 19-JUL-11 23:55:00 (CST-6)
Location: PARK RIDGE
Flood cause: Heavy Rain
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Heavy rain in Stevens Point caused flash flooding on the UW-Stevens Point campus, at St. Michaels Hospital and at the County Courthouse and submerged cars on some streets.  A low crossing under a railroad bridge in Stevens Point remained closed for much of the next day while the water slowly drained.

Thunderstorm Wind in PORTAGE, WISCONSIN
From 19-JUL-11 21:00:00 to 19-JUL-11 21:15:00 (CST-6)
Location: PARK RIDGE
Magnitude: 65.00 EG
Property damage: 530.00K
Reported by: NWS Storm Survey

Widespread thunderstorms wind damage occurred in the Stevens Point and Whiting areas. There were pockets of more significant damage from downtown Stevens Point south to Whiting.  Hundreds of trees were blown down or had broken branches and limbs.  Stevens Point lost $108,000 worth of city-owned trees in the storm.  One home was destroyed, 8 were heavily damaged and 72 sustained minor damage from the storm.  The storm left 17,000 customers without electrical power.