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Flash Flood in Vernon County, Wisconsin

Flash Flood August 18, 2007 – August 19, 2007 · Vernon County, Wisconsin

$28.2M
Damage as recorded
$500K
Crop damage

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Flash floods and mudslides were reported across the county, with numerous county roads closed and impassable. Areas significantly impacted were from around Stoddard to Viroqua. At least 79 people were evacuated below local dams. Mudslides were especially dangerous along Highway 35 on the west end of the county washing away some homes and closing the highway for quite sometime. Railroad tracks were also damaged knocking over one set of rail cars that had hazardous material stored.

Over 1,100 people applied for FEMA assistance including 33 businesses in the county.

The wider storm

A warm front lifting northward into Iowa triggered round after round of thunderstorms leading to excessive rainfall across southwest Wisconsin during the evening and overnight hours of August 18-19. Total rainfall amounts of 10 to 15 inches were common. Specific reports from weather observers included 10.12 inches and 9.73 inches in Readstown and Viroqua (Vernon County) respectively. Rain had also fallen earlier in the day. Due to the excessive rainfall, widespread and significant flash flooding occurred. Numerous roads and bridges were washed out, houses collapsed due to mudslides and hundreds of homes had flooded basements. Amazingly, there were no fatalities reported. This was in spite of reports from law enforcement and fire department officials of rescuing people in stranded vehicles. Damage attributed to the heavy rainfall and subsequent flooding was estimated to be in the millions of dollars. Crawford, La Crosse, Richland and Vernon counties were declared federal disaster areas.

Began near Stoddard (43.6700, -91.2200).

Source: NOAA Storm Events Database, event 50596. Narratives are written by the National Weather Service forecast office that issued the report.

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