Storm Record · Columbia, Waukesha Counties
May 6, 2012: Hail in Columbia and Waukesha Counties
What the National Weather Service recorded
Severe thunderstorms, part of a mesoscale convective system (MCS) that developed over Minnesota the night before on the nose of a low-level jet of 35 knots, brought hail up to 1 inch in diameter and damaging wind gusts estimated at up to 65 mph (57 knots) as they pushed into South Central Wisconsin during the morning hours of May 6th. Trees and power lines were brought down by the severe thunderstorms winds. In addition, there were several reports of minor street flooding with the heavy rains that accompanied the severe thunderstorm complex, as well as two reports of minor fires caused by lightning strikes.
Source: NOAA Storm Events Database · episode 64373
Every report, in the Weather Service's words
Where It Hit
| Location | County | Hazard | Size | Report |
|---|---|---|---|---|
| Mukwonago (2 N) | Waukesha | Wind | 64 mph wind | A trained spotter reported an estimated thunderstorm wind gust of 65 mph (56 knots) two miles bnorth of Mukwonago. |
| Pardeeville (2 E) | Columbia | Wind | 60 mph wind | A trained spotter reported a 10-inch diameter tree was downed by severe thunderstorm wind gusts. |
| Pardeeville (1 N) | Columbia | Hail | 1" hail | |
| Pardeeville | Columbia | Hail | 0.75" hail |