Storm Record · Columbia, Dane, Jefferson, Sauk, Waukesha Counties
August 26, 2018: Straight-line wind across five counties
0.75″
Largest hail
70
Strongest gust
7
NWS reports
What the National Weather Service recorded
Multiple rounds of strong to severe thunderstorms moved across southern WI as a warm front slowly moved north through the region. Flash flooding occurred in Washington, Ozaukee, and northern Milwaukee Counties which was followed by prolonged river flooding. Four to eight inches of rain had fallen over this area. The thunderstorms produced sporadic tree and power line damage across southern WI.
Source: NOAA Storm Events Database · episode 130508
Every report, in the Weather Service's words
Where It Hit
| Location | County | Hazard | Size | Report |
|---|---|---|---|---|
| Jefferson (.86 NW) | Jefferson | Wind | 70 mph wind | Numerous trees and branches down in Jefferson. |
| Lac La Belle (1.22 SW) | Waukesha | Wind | 64 mph wind | Several trees and branches down including two power lines on the west side of Lac La Belle. |
| Oconomowoc Lake (.15 NNE) | Waukesha | Wind | 64 mph wind | Numerous trees and branches down on Valley Road. |
| North Freedom (.85 SE) | Sauk | Wind | 58 mph wind | At least six different locations of trees or large branches down on roads. |
| Portage (1 W) | Columbia | Wind | 58 mph wind | Several trees and power lines down. |
| Summit Corners (1.47 SSW) | Waukesha | Wind | 58 mph wind | A few trees and branches down on Dousman Road. |
| Middleton (.5 W) | Dane | Hail | 0.75" hail | Estimated wind gusts of 50 mph with 3/4 inch hail in Middleton. |
Service areas this storm touched