FloodZoneMap.org

Home› Stories› Wisconsin› Flash Flood 2018

Flash Flood — Jefferson, WI

Aug 17, 2018

Property Damage
$943K
Flood Cause
Heavy Rain

A slow moving low pressure area within a very moist airmass resulted in rounds of heavy rainfall and flash flooding. More specifically, a prolonged period of heavy rainfall over northern Jefferson County, far southern Dodge County, and northeast Dane County resulted in 4 to 8 inches of rain and flash flooding. The cities of Watertown and Waterloo experienced the worst of the flooding.

Source: NOAA National Weather Service Storm Events Database (event 775179). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Jefferson, WI

This event is one of many recorded floods in Jefferson County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Jefferson County flood data →

More Flood Stories

Flash Flood$400K damage

Jefferson, WI · Jun 17, 1996

Heavy rains of 3 to perhaps 6 inches in the pre-dawn hours resulted in flash flooding on the southwest side of Watertown. A 40 foot section of an earthen embankment washed out, leaving railroad tracks suspended in the air.

Read the full account →
Flash Flood$102.2M damage

Jefferson, WI · Jun 8, 2008

A slow-moving surface boundary, nearly parallel with the mid-level flow affected southern Wisconsin during the period of June 7th through June 9th.

Read the full account →
Flood$15K damage

Jefferson, WI · Sep 4, 2018

River flooding was prevalent across southern WI during the month of September after receiving 12 to 20 inches of rain from August 16th to September 5th. Additional rains throughout the remainder of the month prolonged the flooding.

Read the full account →
Flood$2.6M damage

Jefferson, WI · Jun 1, 2004

Scattered to widespread heavy rains across south-central and southeast Wisconsin during the period of June 9-12, 2004 kept many rivers and streams at or above flood stage for a good part, or most of the month.

Read the full account →