Storm Record · Dodge, Jefferson, Walworth, Waukesha Counties
July 9, 2007: Hail across four counties
1″
Largest hail
60
Strongest gust
8
NWS reports
What the National Weather Service recorded
A weak cold front moved southeast through southern Wisconsin and several thunderstorms along the front became severe. Large hail up to 1 inch in diameter and powerful wind gusts to around 52 knots (60 mph) were produced. Dewpoints in the upper 60s to lower 70s resulted in CAPE values of 1500-2000, which was sufficient for severe storm development.
Source: NOAA Storm Events Database · episode 8757
Every report, in the Weather Service's words
Where It Hit
| Location | County | Hazard | Size | Report |
|---|---|---|---|---|
| Rubicon | Dodge | Wind | 60 mph wind | Powerful thunderstorm wind gusts to around 52 knots (60 mph) toppled several large trees. |
| Delavan (2.5 NE) | Walworth | Wind | 60 mph wind | Powerful thunderstorm winds toppled several large trees. |
| Williams Bay | Walworth | Hail | 1" hail | |
| Waterloo (.2 NE) | Jefferson | Hail | 1" hail | |
| Spring Prairie | Walworth | Hail | 0.88" hail | Thunderstorm wind gusts to about 39 knots (45 mph) also noted. |
| Hartland (4 N) | Waukesha | Hail | 0.75" hail | |
| Cold Spg (4 SE) | Jefferson | Hail | 0.75" hail | |
| Whitewater | Walworth | Hail | 0.75" hail |
Service areas this storm touched