A line of storms moved across northeast Iowa during the evening of July 23rd. These storms produced an EF1 tornado west of Waukon (Allamakee County) that damaged a farm and trees. Strong thunderstorm winds caused extensive damage to several buildings at the community college in Calmar (Winneshiek County) and flipped over a couple vehicles. The public school athletic fields in Calmar were also heavily damaged. The press box was blown off the high school football stands, metal light poles were downed at the softball field, and metal bleachers were thrown over a fence and onto the field. In Waukon, the roofs were damaged on numerous buildings and several trees and power lines were blown down. The Governor of Iowa issued a disaster proclamation for Allamakee, Clayton and Winneshiek Counties.

Thunderstorm Wind in ALLAMAKEE, IOWA
From 23-JUL-22 22:39:00 to 23-JUL-22 22:39:00 (CST-6)
Location: LUDLOW
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

An estimated 60 mph wind gust occurred west of Waukon.

Thunderstorm Wind in CLAYTON, IOWA
From 23-JUL-22 22:59:00 to 23-JUL-22 22:59:00 (CST-6)
Location: STRAWBERRY PT
Magnitude: 57.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines were blown down northeast of Strawberry Point.

Thunderstorm Wind in ALLAMAKEE, IOWA
From 23-JUL-22 22:45:00 to 23-JUL-22 22:45:00 (CST-6)
Location: WAUKON
Magnitude: 52.00 EG
Property damage: 80.00K
Crop damage: 0.00K
Reported by: Public

An estimated 60 mph wind gust occurred in Waukon. The roof was blown off a business, a home lost part of its roof and several other businesses sustained some roof damage.

Thunderstorm Wind in WINNESHIEK, IOWA
From 23-JUL-22 22:25:00 to 23-JUL-22 22:25:00 (CST-6)
Location: DECORAH
Magnitude: 55.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees and power lines were blown down across the central part of Winneshiek County, roughly from north of Decorah to Fort Atkinson.

Thunderstorm Wind in WINNESHIEK, IOWA
From 23-JUL-22 22:36:00 to 23-JUL-22 22:36:00 (CST-6)
Location: CALMAR
Magnitude: 59.00 EG
Property damage: 840.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In and near Calmar, several buildings sustained wind damage and numerous trees were blown down. The roof was blown off a house, a business lost part of its roof, a system to move grain between storage silos was destroyed, a metal silo collapsed, the side of another silo was blown in, and a portion of the roof was removed from a large barn. At the community college, numerous buildings sustained roof and siding damage with doors blown in, windows broken, and a couple of vehicles were also blown over. The public schools sustained damage to their athletic fields. Metal bleachers at the softball field were blown over and pushed through a chain link fence. At the football field, the new press box was blown off the top of the stadium and two metal light poles were downed. Some rooftop air conditioning units were flipped over on the high school building.

Thunderstorm Wind in WINNESHIEK, IOWA
From 23-JUL-22 22:31:00 to 23-JUL-22 22:31:00 (CST-6)
Location: DECORAH MUNI ARPT
Magnitude: 40.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down east of Decorah, one of which blocked a road.

Thunderstorm Wind in WINNESHIEK, IOWA
From 23-JUL-22 22:29:00 to 23-JUL-22 22:29:00 (CST-6)
Location: DECORAH
Magnitude: 42.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Trees and power lines were blown down in Decorah.

Thunderstorm Wind in CLAYTON, IOWA
From 23-JUL-22 23:34:00 to 23-JUL-22 23:34:00 (CST-6)
Location: GUTTENBURG
Magnitude: 40.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power lines were blown down in Guttenberg.

Tornado in ALLAMAKEE, IOWA
From 23-JUL-22 22:44:00 to 23-JUL-22 22:46:00 (CST-6)
Location: WAUKON
Tornado F-scale: EF1
Property damage: 60.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief EF1 tornado touched down southwest of Waukon. The tornado damaged the roofs on farm outbuildings along with some trees.

Thunderstorm Wind in ALLAMAKEE, IOWA
From 23-JUL-22 22:47:00 to 23-JUL-22 22:47:00 (CST-6)
Location: WAUKON
Magnitude: 55.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A barn was blown down and two silos collapsed on a farm southwest of Waukon.

Flood in ALLAMAKEE, IOWA
From 24-JUL-22 09:23:00 to 24-JUL-22 14:30:00 (CST-6)
Location: CHESTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains pushed the Upper Iowa River out of its banks near Dorchester twice on July 24th. The highest crest was less than a foot above the flood stage at 14.67 feet.