Storm Record · Jefferson County
October 26, 2010: Straight-line wind in Jefferson County
What the National Weather Service recorded
An intensifying 50 to 70 knot low-level jet ahead of an intense negatively-tilted upper level trough over the Plains transported low-level moisture and instability into southern Wisconsin during the early morning hours of October 26th. Overall forcing for ascent increased as a vorticity maximum rounded the base of the upper trough and lifted northeast across western Wisconsin. Severe thunderstorms developed ahead of a surface cold/occluded front that trailed from record surface low pressure over northern Minnesota. Strong shear profiles were supportive of rotating updrafts which produced damaging wind gusts and an EF1 tornado that moved from extreme northern Kenosha County into eastern Racine County. For additional related information go to this URL: http://www.crh.noaa.gov/mkx/?n=102610_recordcyclone.
Source: NOAA Storm Events Database · episode 45281
Every report, in the Weather Service's words
Where It Hit
| Location | County | Hazard | Size | Report |
|---|---|---|---|---|
| Helenville | Jefferson | Wind | 75 mph wind | An NWS employee reported multiple homes with roof shingle damage from thunderstorm wind gusts estimated up to 65 knots (75 mph). |
| Lake Mills (3 W) | Jefferson | Wind | 75 mph wind | Law enforcement officials reported numerous trees and power lines blown down by thunderstorm wind gusts estimated up to 65 knots (75 mph) in the city of Lake Mills. |
Service areas this storm touched