Weak Tornado and Isolated Severe Storms Hit Region on July 12

Overview

Isolated severe thunderstorms with large hail, gusty winds, and a weak tornado hit north-central and northeast Wisconsin during the evening of July 12, 2017.

Ping-pong ball size hail was reported with a couple of thunderstorms in far north-central Wisconsin. A weak tornado formed with a storm in Portage County.

This tornado is the 13th in the NWS Green Bay service area of northeast Wisconsin (through July 14). The average number of tornadoes in northeast Wisconsin for a year is seven.

Tornado
Photos and Radar

Tornadoes:

Tornado - Near Custer
Portage County

Date	July 12, 2017
Time (Local)	8:30 pm to 8:32 pm
EF Rating	0
Est. Peak Winds	70
Path Length	0.7 mi
Max Width	30 yds
Injuries/Deaths	0/0
Summary: A weak tornado produced minor crop damage and damage to an outbuilding on a farm just south of Custer. Time of event is estimated from radar and public report.

Track Map

Downloadable KMZ File

The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:

EF0 Weak 65-85 mph	EF1 Moderate 86-110 mph	EF2 Significant 111-135 mph	EF3 Severe 136-165 mph	EF4 Extreme 166-200 mph	EF5 Catastrophic 200+ mph

Photos and Radar:


Funnel cloud after tornado damage, taken after 8:30 pm. (Image: Joyce Karpinski)	Tornado track through corn field. (Image: Dave Eron)	Damage to outbuilding. (Image: Dave Eron)	Radar image at 8:32 PM showing reflectivity (L) and storm-relative velocity.

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