During the afternoon and evening hours of August 22nd, the second round of storms for the calendar day moved east across south-central and southeast Wisconsin.  The clusters or short lines of storms moved east at a speed of about 30 knots (35 mph), and generated damaging downburst straight-line winds that toppled trees and power-lines, and heavy rains that triggered flash flooding.  Synoptically, a stationary front stretched from northern Iowa to Wisconsin/Illinois border.  Warm, moist, unstable air flowed north over the front in association with an upper-level short-wave trough, resulting in thunderstorm generation.  Hourly rainfall rates peaked around 2 inches.
By the end of August, 2007, many locations in south-central and southeast Wisconsin would establish new August rainfall records, and all-time/any month rainfall records.  Many locations measured 10 to over 20 inches for the month of August, 2007, or about 200% to over 400% of normal.  Normal August precipitation in southern Wisconsin is about 4 to 4.25 inches.  Unofficially, about 25 inches fell at a location 2W of Barneveld, Iowa County.  Specific August, 2007, monthly totals are listed in the various flash flood events of August 18-19th and August 22nd.

Flash Flood in DODGE, WISCONSIN
From 22-AUG-07 16:00:00 to 22-AUG-07 19:00:00 (CST-6)
Location: BEAVER DAM
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 200.00K
Reported by: Law Enforcement

Heavy rain from thunderstorms resulted in scattered flash flood conditions in the Beaver Dam to Horicon area.  Fast-flowing water depths of 1 to 2 feet were reported, as well as basement flood damage in about 20 homes.  Sandbagging occurred in Beaver Dam.  There were reports of soil erosion and some crop damage.

Flash Flood in KENOSHA, WISCONSIN
From 22-AUG-07 19:00:00 to 22-AUG-07 23:00:00 (CST-6)
Location: WHEATLAND
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 300.00K
Reported by: Law Enforcement

Several rounds of thunderstorms with heavy rains on top of a saturated ground resulted in flash flooding from the Sturtevant area into the city of Racine.  STH 50 between STH 75 and STH 83 was closed in several spots due to water depths of 3 to 5 feet.  Some local residents indicated that this was the highest water levels they've ever seen. The Fox River and Des Plains river exceeded flood stage.  Sandbagging occurred and a berm was built in Wheatland.  At least a couple dozen homes had water damage to basement contents, or sewage backups. Some soil erosion and crop damage were noted in the area.
August, 2007, rainfall totals include:  11.50 in Kenosha, 10.78 at the Kenosha Airport, 9.96 in Paddock Lake, and 12.18 in Twin Lakes.

Thunderstorm Wind in WAUKESHA, WISCONSIN
From 22-AUG-07 21:30:00 to 22-AUG-07 21:30:00 (CST-6)
Location: PEWAUKEE
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Newspaper

Powerful thunderstorm wind gusts up to 56 knots (65 mph) toppled several large trees and damaged a couple power-lines.  One tree landed on a home and damaged the roof and a skylight.

Flash Flood in RACINE, WISCONSIN
From 22-AUG-07 18:30:00 to 22-AUG-07 23:00:00 (CST-6)
Location: STURTEVANT
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 100.00K
Reported by: Law Enforcement

Several rounds of thunderstorms with heavy rains on top of a saturated ground resulted in flash flooding from the Sturtevant area into the city of Racine.  Fast-flowing water reached depths of 6 inches to 2 feet on several roads.  The following roads were closed: Intersection of CTH X and Southwood Drive, Intersection of STH 11 and STH 32, and intersection of CTH H and CTH KR.  At least a couple dozen homes had water damage to basement contents, or sewage backups. Some soil erosion and minor crop damage were noted in the area.
August, 2007, rainfall totals include: 11.47 in Burlington, 11.58 in Racine, 11.04 at the Racine Airport, 12.41 in Union Grove, and 13.75 in Waterford.

Flash Flood in DANE, WISCONSIN
From 22-AUG-07 16:15:00 to 22-AUG-07 21:00:00 (CST-6)
Location: DOWNTOWN MADISON
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 200.00K
Reported by: Law Enforcement

Flash flooding occurred due to repeated thunderstorms with heavy rains on top of a saturated ground.  From Madison to Sun Prairie many roads had fast-flowing water depths of 6 inches to 1 foot, and several were closed.  Sandbagging also took place to control the flash flooding.  A 1-hour rainfall total of 2.26 inches was measured by a spotter in Madison.  Soil erosion and crop damage also occurred on several other farms in that area.  Additionally, a few basements had water damage to contents.
August, 2007, rainfall totals include: 15.18 at Madison Truax Field, 14.58 at the UW-Charmany Farm, 14.92 at mazomanie, 14.43 in Middleton, 18.48 near Mt. Horeb, 16.37 in Stoughton, 15.74 in Sun Prairie, and 13.49 at the UW Arboretum.  Up to 20 may have fallen in the southwest corner.

Flash Flood in GREEN, WISCONSIN
From 22-AUG-07 19:00:00 to 22-AUG-07 21:30:00 (CST-6)
Location: BROWNTOWN
Flood cause: Heavy Rain
Property damage: 400.00K
Crop damage: 1.00M
Reported by: Law Enforcement

Several rounds of thunderstorms with heavy rains on top of a saturated ground resulted in another round of scattered flash flooding across Green County.  At least another 150 residents sustained water damage to basement contents and/or basement walls.  Two homes in Browntown had basements on the verge of collapsing.  One farm home near Brooklyn had 5 feet of water in the basement and the basement walls cracked.  Two silos on the same property had cracking due to water accumulation.  In the city of Brodhead, a sink hole developed which resulted in the sewer system collapsing at that location.  Road damages (gravel washouts or culverts) were scattered around the county, and totaled 91,000.  Several roads were closed over the eastern third of the county due to either fast-flowing water or high water levels.  Many other roads across the county had at least 6 inches to 1 foot of fast flowing water covering them.  About 20 homes in Albany had basement flooding and sewage backups and needed to be pumped out.  In some cases water depths were almost to the basement ceiling!  Several homes and businesses in New Glarus had sewage backups.  A home on CTH Y near Monroe had a partial collapse of two basement walls.  A mudslide occurred on CTH M just south of Jordon Center.  Soil erosion and crop damage was also noted.  Refer to the August 18-19, 2007, Flash Flood event for Green County for related information.
August, 2007, rainfall totals include: 15.57 at Brodhead, 15.43 in Monroe, and 20.20 in New Glarus.

Flash Flood in ROCK, WISCONSIN
From 22-AUG-07 18:15:00 to 22-AUG-07 21:00:00 (CST-6)
Location: EVANSVILLE
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 500.00K
Reported by: Law Enforcement

Several rounds of thunderstorms with heavy rains on top of a saturated ground resulted in scattered flash flooding from the Evansville area to the Janesville vicinity.  Water damage to basement contents and/or basement walls, as well as fast-flowing water depths of 6 inches to 1 foot on roads, were reported in the Civil Towns of Avon, Fulton, Magnolia, Union, and Plymouth.  Some soil erosion, gravel washouts, and crop damage were noted.  Badfish Crreek and Allen Creek just east and northeast of Evansville exceeded flood stages by 3 to 5 feet and overflowed adjacent roads.
August, 2007, rainfall totals include: 17.39 at Afton, 13.15 in Beloit, 16.24 in Clinton, 15.22 in Milton, and over 17 in Janesville.

Flash Flood in WALWORTH, WISCONSIN
From 22-AUG-07 18:30:00 to 22-AUG-07 23:00:00 (CST-6)
Location: WHITEWATER
Flood cause: Heavy Rain
Property damage: 150.00K
Crop damage: 200.00K
Reported by: Law Enforcement

Several rounds of thunderstorms with heavy rains on top of a saturated ground resulted in scattered flash flood events across the entire county of Walworth.  Fast-flowing water reached depths of 6 inches to 2 feet at the following locations: STH 11 just east of STH 89 (about 3N of Darien), Plank Road just northeast of Elkhorn, Highway 12 and Potter Road, CTH L near East Troy, and several roads around Richmond.  Johnson Creek and Turtle Creek areas between Richmond and I-43 exceeded flood stage.  At least a couple dozen homes had water damage to basement contents, or sewage backups.  Two basement walls of a home in the Civil Town of Lafayette, or about 2 miles east-northeast of Elkhorn, collapsed.  Some soil erosion and minor crop damage were noted in the county.  A couple minor landslides occurred along the shoreline of Geneva Lake.
August, 2007, rainfall totals include: 12.83 in Genoa City, and 12.67 in Whitewater.

Flash Flood in DANE, WISCONSIN
From 22-AUG-07 18:00:00 to 22-AUG-07 21:30:00 (CST-6)
Location: OREGON
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 200.00K
Reported by: Law Enforcement

Flash flooding occurred in the Oregon vicinity due to repeated thunderstorms with heavy rains on top of a saturated ground.  In Oregon, numerous roads were covered with fast-flowing water depths of 6 inches to 1 foot.  Sandbagging also took place to control the flash flooding.  Hourly rainfall rates were 1.5 to 2 inches based on WSR-88D Doppler radar estimates.  Soil erosion and crop damage also occurred on several other farms in that area.  Additionally, a few basements had water damage to contents.  All creeks and streams around Oregon were two to three feet above flood stage.

Thunderstorm Wind in DODGE, WISCONSIN
From 22-AUG-07 15:55:00 to 22-AUG-07 15:55:00 (CST-6)
Location: ASHIPPUN
Magnitude: 56.00 MG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm wind gusts up to 56 knots (65 mph) toppled several large trees and damaged some power-lines.

Flash Flood in JEFFERSON, WISCONSIN
From 22-AUG-07 16:00:00 to 22-AUG-07 21:00:00 (CST-6)
Location: LAKE MILLS
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 200.00K
Reported by: Law Enforcement

Flash flooding occurred in the Lake Mills to Watertown area due to repeated thunderstorms with heavy rains on top of a saturated ground.  Numerous roads were covered with fast-flowing water depths of 6 inches to 1 foot.  Hourly rainfall rates were 1.5 to 2 inches based on WSR-88D Doppler radar estimates.  Soil erosion and crop damage also occurred on several other farms in that area.  Additionally, a few basements had water damage to contents.  Most creeks and streams in the area exceeded flood stage by one to 2 feet.
August, 2007, rainfall totals include: 10.64 in Ft. Atkinson, 12.68 in Jefferson, 17.75 in Lake Mills, 14.39 in Watertown, 12.54 in Waterloo, and 12.78 at the NWS office 3.8SE of Sullivan.

Flash Flood in WAUKESHA, WISCONSIN
From 22-AUG-07 16:15:00 to 22-AUG-07 21:00:00 (CST-6)
Location: HARTLAND
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 200.00K
Reported by: Law Enforcement

Several rounds of thunderstorms with heavy rains on top of a saturated ground resulted in scattered flash flooding from the Hartland area to the City of Waukesha.  Many roads in this area had at least 6 inches to 1 foot of fast flowing water covering them.  At least a couple dozen homes in this area had basement flooding and sewage backups and needed to be pumped out.  A vehicle got stuck in 3 to 4 feet deep the flood waters in the Village of Pewaukee, where sandbagging took place.  Soil erosion and crop damage was also noted.
August, 2007, rainfall totals include: 10.72 in Oconomowoc, and 9.62 in Waukesha.  In Milwaukee County, Milwaukee Mitchell Field measured 7.92 for the month, which makes August, 2007 the 4th wettest August in Milwaukee.

Flash Flood in IOWA, WISCONSIN
From 22-AUG-07 18:30:00 to 22-AUG-07 19:45:00 (CST-6)
Location: MINERAL PT
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 100.00K
Reported by: Law Enforcement

Several rounds of thunderstorms with heavy rains on top of a saturated ground resulted in a flash flood event in hilly Mineral Point.  Fast-flowing water quickly flooded the city' streets to a depth of 6 inches to 2 feet.  One residential home's driveway was washed out by the flood waters.  A few homes in the city sustained water damage to basement contents.  Some soil erosion and crop damage were noted in the surrounding countryside.
August, 2007, rainfall totals include: 20.12 in Dodgeville, and an unofficial 25 at a location 2W of Barneveld.

Flash Flood in DODGE, WISCONSIN
From 22-AUG-07 16:15:00 to 22-AUG-07 20:00:00 (CST-6)
Location: WATERTOWN
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 400.00K
Reported by: Law Enforcement

Heavy rain from thunderstorms resulted in scattered flash flood conditions in the Watertown to Rubicon area.  Fast-flowing water depths of 1 to 2 feet were reported, as well as basement flood damage in about 50 homes.  Several homes had water flowing in through windows as well as through wall cracks.  There were reports of soil erosion and some crop damage.  A resident on north side of Watertown picked up 1.84��� of rain in 28 minutes, and a total of 3.22 inches from 4 pm to 520 pm.

Flash Flood in WASHINGTON, WISCONSIN
From 22-AUG-07 16:30:00 to 22-AUG-07 21:00:00 (CST-6)
Location: HARTFORD
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 500.00K
Reported by: Newspaper

Heavy rain from thunderstorms resulted in flash flood conditions northeast of Hartford.  Rainfalls of 2 to 3 inches were measured in the area.  A flower farm reported substantial damage amounts due to the heavy rains, with some small hail adding insult.  Soil erosion and crop damage also occurred on several other farms in that area.  in the Watertown to Rubicon area.  Fast-flowing water depths of 6 inches to 1 foot were also reported on a couple roads.  Additionally, a few basements had water damage to contents.

Flash Flood in LAFAYETTE, WISCONSIN
From 22-AUG-07 19:00:00 to 22-AUG-07 21:30:00 (CST-6)
Location: SHULLSBURG
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 200.00K
Reported by: Law Enforcement

Flash flooding occurred south of the Village of Shullsburg due to repeated thunderstorms with heavy rains on top of a saturated ground.  CTH O south of Shullsburg was coverd with fast-flowing water depths of 6 inches to 1 foot.  One mile south of the village a mudslide occurred onto CTH O.  Hourly rainfall rates were 1.5 to 2 inches based on WSR-88D Doppler radar estimates.  Soil erosion and crop damage also occurred on several other farms in that area.  Additionally, a few basements had water damage to contents.  Most creeks and streams in the area exceeded flood stage by one to two feet.
August, 2007, rainfall totals include: 16.98 at Arygle, and 17.22 at Blanchardville.

Thunderstorm Wind in MILWAUKEE, WISCONSIN
From 22-AUG-07 16:28:00 to 22-AUG-07 16:28:00 (CST-6)
Location: GREENFIELD
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm wind gusts up to 52 knots (60 mph) toppled several large trees and damaged some power-lines.

Thunderstorm Wind in IOWA, WISCONSIN
From 22-AUG-07 17:07:00 to 22-AUG-07 17:07:00 (CST-6)
Location: MINERAL PT
Magnitude: 56.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Powerful thunderstorm wind gusts up to 56 knots (65 mph) toppled several large trees and damaged some power-lines.

Thunderstorm Wind in GREEN, WISCONSIN
From 22-AUG-07 17:35:00 to 22-AUG-07 17:35:00 (CST-6)
Location: JORDAN
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Powerful thunderstorm wind gusts up to 52 knots (60 mph) toppled several large trees and damaged a couple power-lines.

Thunderstorm Wind in GREEN, WISCONSIN
From 22-AUG-07 17:48:00 to 22-AUG-07 17:48:00 (CST-6)
Location: NEW GLARUS
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Powerful thunderstorm wind gusts up to 65 knots (75 mph) toppled several large trees and damaged seveal power-lines.  A large pine tree 100 feet tall was snapped at the 10 foot level.

Thunderstorm Wind in WASHINGTON, WISCONSIN
From 22-AUG-07 16:05:00 to 22-AUG-07 16:05:00 (CST-6)
Location: HARTFORD
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm wind gusts up to 52 knots (60 mph) toppled several large trees and damaged some power-lines.

Thunderstorm Wind in WAUKESHA, WISCONSIN
From 22-AUG-07 15:42:00 to 22-AUG-07 15:42:00 (CST-6)
Location: OCONOMOWOC
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm wind gusts up to 52 knots (60 mph) toppled several large trees and damaged some power-lines.

Thunderstorm Wind in MILWAUKEE, WISCONSIN
From 22-AUG-07 16:31:00 to 22-AUG-07 16:31:00 (CST-6)
Location: MILWAUKEE TIMMERMAN AIRPORT
Magnitude: 68.00 MG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm wind gusts up to 68 knots (78 mph) toppled several large trees and damaged some power-lines.

Thunderstorm Wind in MILWAUKEE, WISCONSIN
From 22-AUG-07 16:15:00 to 22-AUG-07 16:20:00 (CST-6)
Location: BROWN DEER
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm wind gusts up to 52 knots (60 mph) toppled several large trees and damaged some power-lines.

Thunderstorm Wind in MILWAUKEE, WISCONSIN
From 22-AUG-07 17:03:00 to 22-AUG-07 17:10:00 (CST-6)
Location: SHOREWOOD
Magnitude: 56.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm wind gusts up to 56 knots (65 mph) toppled several large trees and damaged some power-lines.

Thunderstorm Wind in GREEN, WISCONSIN
From 22-AUG-07 17:46:00 to 22-AUG-07 17:46:00 (CST-6)
Location: MONTICELLO
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Powerful thunderstorm wind gusts up to 56 knots (65 mph) toppled several large trees and damaged a couple power-lines.

Thunderstorm Wind in WASHINGTON, WISCONSIN
From 22-AUG-07 15:48:00 to 22-AUG-07 15:48:00 (CST-6)
Location: HARTFORD
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm wind gusts up to 56 knots (65 mph) toppled several large trees and damaged some power-lines.

Thunderstorm Wind in WASHINGTON, WISCONSIN
From 22-AUG-07 15:57:00 to 22-AUG-07 15:57:00 (CST-6)
Location: HARTFORD
Magnitude: 58.00 MG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm wind gusts up to 58 knots (68 mph) toppled several large trees and damaged some power-lines.

Thunderstorm Wind in WAUKESHA, WISCONSIN
From 22-AUG-07 16:01:00 to 22-AUG-07 16:01:00 (CST-6)
Location: SUSSEX
Magnitude: 52.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm wind gusts up to 52 knots (60 mph) toppled several large trees and damaged some power-lines in the area from Sussex to Pewaukee to Brookfield.

Thunderstorm Wind in OZAUKEE, WISCONSIN
From 22-AUG-07 16:15:00 to 22-AUG-07 16:25:00 (CST-6)
Location: GRAFTON
Magnitude: 52.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Powerful thunderstorm wind gusts up to 52 knots (60 mph) toppled several large trees and damaged some power-lines.