Storm Events Database

Event Details

Event High Wind
Magnitude 60 kts.
State WISCONSIN
County/Area IRON
WFO DLH
Begin Date 05/09/2011 12:00:00 CST-6
End Date 05/09/2011 12:00:00 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 2.00K
Crop Damage
Episode Narrative As an area of rain and thunderstorms quickly dissipated on the morning of May 9th, a localized area of low pressure formed behind the precipitation. This rapid fluctuation in pressure, and local low pressure is referred to as a wake low. The wake low caused strong wind gusts across much of northwest Wisconsin and western Lake Superior, and resulted in sporadic tree damage in many locations. A few spots of more significant damage were observed in Ashland and Iron Counties. Measured wind gusts by weather stations were generally between 40 and 50 mph. Some of the more notable gusts included a 48 mph gust at the Hayward Airport (Sawyer County), a 47 mph gust at Barnes (Bayfield County), a 50 mph gust at Phillips (Price County), and a 50 mph gust 2 miles northwest of Maple (Douglas County). The private weather station northwest of Maple also measured a pressure drop of 4 millibars (0.12 inches of mercury) in 30 minutes. The strong winds also affected western Lake Superior, and a ship approaching Two Harbors reported a 40 knot gust at 80 feet above sea level, with developing 2 foot waves.
Event Narrative Trees and tree branches were blown down across Iron County. Around Saxon, the winds caused some minor roof damage and blew a few trees down on houses. Metal pieces of the roof of the old Saxon school building blew off, and one piece broke a window on a car. These reports were relayed by spotters and members of the public, as well as from local newspaper articles. Measured wind gusts in Iron County peaked at 46 mph at the Saxon Harbor marine observation. However, the damage suggests that localized pockets of wind gusts up to 60 knots (69 mph) occurred.


All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 4.00K 0.00K
ASHLAND (ZONE) ASHLAND (ZONE) WI 05/09/2011 11:45 CST-6 High Wind 60 kts. EG 0 0 2.00K 0.00K
IRON (ZONE) IRON (ZONE) WI 05/09/2011 12:00 CST-6 High Wind 60 kts. EG 0 0 2.00K 0.00K
Totals: 0 0 4.00K 0.00K