Southern Wisconsin was situated between a polar high pressure area centered over southeast Canada and a strong low pressure that tracked from the central Plains toward northwest Illinois during the day on April 15th. The resulting tight surface pressure gradient over the region produced sustained east winds of 25 to 35 mph with peak gusts between 45 and 54 mph over a nearly 12-hour period.  Scattered power outages were noted across southern Wisconsin due to broken tree branches falling on to power-lines.

Strong Wind in MARQUETTE, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 39.00 EG
Property damage: 3.00K
Reported by: Law Enforcement

Strong east to northeast gradient winds gusted to an estimated 45 mph (39 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in GREEN LAKE, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 39.00 EG
Property damage: 3.00K
Reported by: Law Enforcement

Strong east to northeast gradient winds gusted to an estimated 45 mph (39 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in FOND DU LAC, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 35.00 MG
Property damage: 3.00K
Reported by: ASOS

Strong east to northeast gradient winds gusted to 40 mph (35 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in SAUK, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 38.00 MG
Property damage: 3.00K
Reported by: AWOS

Strong east to northeast gradient winds gusted to 44 mph (38 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in COLUMBIA, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 35.00 EG
Property damage: 3.00K
Reported by: Law Enforcement

Strong east to northeast gradient winds gusted to 45 mph (39 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in DODGE, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 40.00 MG
Property damage: 3.00K
Reported by: AWOS

Strong east to northeast gradient winds gusted to 46 mph (40 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in WASHINGTON, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 32.00 MG
Property damage: 3.00K
Reported by: AWOS

Strong east to northeast gradient winds gusted to 37 mph (32 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in IOWA, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 39.00 MG
Property damage: 3.00K
Reported by: ASOS

Strong east to northeast gradient winds gusted to 45 mph (39 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in OZAUKEE, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 39.00 EG
Property damage: 3.00K
Reported by: Law Enforcement

Strong east to northeast gradient winds gusted to 45 mph (39 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in DANE, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 39.00 MG
Property damage: 3.00K
Reported by: ASOS

Strong east to northeast gradient winds gusted to 45 mph (39 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in JEFFERSON, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 26.00 MS
Property damage: 3.00K
Reported by: AWOS

Strong east to northeast gradient winds were sustained to 30 mph (26 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in MILWAUKEE, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 39.00 EG
Property damage: 5.00K
Reported by: COOP Observer

Strong east to northeast gradient winds gusted to 45 mph (39 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in WAUKESHA, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 35.00 MG
Property damage: 3.00K
Reported by: AWOS

Strong east to northeast gradient winds gusted to 40 mph (35 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in LAFAYETTE, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 39.00 EG
Property damage: 3.00K
Reported by: COOP Observer

Strong east to northeast gradient winds gusted to 45 mph (39 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in GREEN, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 26.00 MS
Property damage: 3.00K
Reported by: AWOS

Strong east to northeast gradient winds were sustained to 30 mph (26 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in WALWORTH, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 39.00 EG
Property damage: 3.00K
Reported by: Law Enforcement

Strong east to northeast gradient winds gusted to 45 mph (39 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in ROCK, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 47.00 MG
Property damage: 10.00K
Reported by: AWOS

Strong east to northeast gradient winds gusted to 54 mph (26 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in RACINE, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 31.00 MG
Property damage: 3.00K
Reported by: AWOS

Strong east to northeast gradient winds gusted to 36 mph (31 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in KENOSHA, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 35.00 MG
Property damage: 3.00K
Reported by: AWOS

Strong east to northeast gradient winds gusted to 40 mph (35 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.

Strong Wind in SHEBOYGAN, WISCONSIN
From 15-APR-11 09:00:00 to 15-APR-11 20:00:00 (CST-6)
Magnitude: 32.00 MG
Property damage: 3.00K
Reported by: ASOS

Strong east to northeast gradient winds gusted to 37 mph (32 knots) as southern Wisconsin was between low pressure passing to the west and high pressure to the east.