Allamakee storm history

One person was killed after a vehicle slid off an icy county road near Harpers Ferry. Freezing drizzle earlier in the day created a glaze of ice on untreated roads.

Heavy rainfall caused flooding of basements, which may have indirectly contributed to the death of man in Postville. He was electricuted from entering a flooded basement with live power.

At least nine people were injured in separate accidents across the county. The accidents either occurred in dense fog when the visibility was a quarter of a mile or less or on icy roads. The icy conditions were created by the fog with temperatures below freezing or when recent sn…

Mudslides occurred over the eastern section of the county from Lansing to north of Harpers Ferry covering portions of County Road X52. Other flash flooding occurred over much of the county. A campground in the Yellow River State Forest had to be evacuated with 80 campers moved to…

Excessive rainfall caused fairly widespread flash flooding across the county. Steep terrain enhanced the flash flood threat causing mud slides and damaged infrastructure. Numerous roads were washed out and bridges damaged. A mud slide at Camp Tahigwa Girl Scout camp near Dorchest…

Many roads, mainly secondary, were washed out in the county. Rainfall totals of 5-7 inches were reported for the weekend of June 7-8 with widespread flood problems. About 2500 acres of crops were damaged.

This significant winter storm brought between 6 and 8 inches of snow to Allamakee County between November 28th and 29th. The highest snowfall report in the county was located 5 miles west of Dorchester where 7 inches of snow was observed.

Heavy rain during the middle of August allowed the Upper Iowa River at Dorchester to rise into flood stage during the morning on August 18th. The site crested at 16.89 ft in minor flood stage during the evening on August 18th before falling below flood stage during the evening on…

Minimum wind chills across Allamakee County ranged from 25 to 35 degrees on the morning of February 18th.

Dangerously cold wind chills began on the evening of the 20th and continued through noon on the 21st in Allamakee County where values dropped between 25 to 35 degrees below zero. The coldest observed wind chill in the county of 35 degrees below zero was recorded in Harpers Ferry,…

Throughout the entirety of September and through October 29th, only 0.5 to 2 inches of precipitation fell in Allamakee County. This 4 to 7 inch deficit for this period resulted in the development of severe drought by mid-October. Severe drought conditions ended in the county by O…

Emergency management reported nickel sized hail 2 miles east of New Albin.

Emergency management reported tree branches down on State Highway 26.

Anomalously warm air temperatures and high humidity allowed the heat index to reach 119 degrees at Yellow River State Forest on August 26th.

The public reported a large tree snapped at the base.

Significant rainfall throughout June pushed the Mississippi River at Lansing into flood stage in June and continued into July. The river stage crested during the early morning on July 5th in minor flood stage at 18.06 ft.

Significant rainfall throughout June pushed the Mississippi River at Lansing into flood stage on June 30th. The river stage continued to rise through the end of the month while remaining in minor flood stage.

Significant rainfall later into June pushed the Little Cedar River at Ionia into flood stage on June 24th. The river stage crested around midnight on June 25th in minor flood stage at 17.26 ft.

Significant rainfall throughout June pushed the Upper Iowa River at Dorchester into flood stage on June 24th. The river stage crested during the early morning on June 25th in minor flood stage at 14.97 ft.

Emergency management reported mudslides along Highway 26 outside of Lansing.

Emergency Management reported trees down near Dorchester.

Trees were reported down in the Yellow River area. Large amounts of dust and dirt were kicked up as well.

A 59 mph gust was measured near Postville.

Trees were reported down on an RV, and another RV was tipped over at the Scenic View Campground.

The public reported a mud slide caused a block wall to come down on X52 and the rail track next to it. Mud debris was reported to be on the train track.

A couple of small mudslides were reported near Lansing. Clear Creek was also reported to be out of its banks.

A trained spotter reported a tree split in half that destroyed a recreational vehicle.

Volunteer observers reported 2 to 7 of snow accumulation in Allamakee County with a maximum of 7.0 in Waukon and near Lansing.

Slightly above normal total monthly rainfall resulted in alleviation of severe (D2) drought in Allamakee County through April.

Near to slightly below normal total monthly precipitation of 1 to 2 resulted in slight improvement from severe (D2) to moderate drought (D1) across northeastern Allamakee County through March, though severe (D2) drought persisted elsewhere in the county.

Total liquid precipitation of 0.75 fell in Allamakee County through February, more than 0.5 below normal, resulting in severe (D2) drought persisting.

A volunteer observer reported 7.5 of snowfall in Harpers Ferry.

A volunteer observer reported 8.9 in Postville.

Severe (D2) drought persisted across Allamakee County through January. While 1.5 to 3 of monthly total liquid precipitation was up to 2 above normal, the long-standing abnormally dry conditions, near 10 below normal since June 1st, 2023, resulted in severe (D2) drought persisting…

Severe (D2) drought persisted across all of Allamakee County through December. While monthly total rainfall of 2 was at or slightly below normal, the long-standing abnormally dry conditions, near 10 below normal since June 1st, allowed severe (D2) drought to persist.

Volunteer observers reported 1.3 to 2.0 inches of snowfall across Allamakee County with the highest amount reported near Harpers Ferry.

Severe (D2) drought persisted across all of Allamakee County through November. The combination of total monthly precipitation under 0.2 inches, more than 2 inches below normal in spots, and several days of anomalously warm temperatures resulted in 20 to 30% below normal topsoil m…

While volunteer observers reported only 1 to 2 inches of snowfall from late on October 30th through the morning of October 31st, the combination with 40 mph wind gusts rapidly worsened road conditions. These slippery to hazardous travel conditions resulted in multiple slide offs …

Long-standing drier than normal conditions, comprised of 15 weeks of at least severe drought (D2), slightly eased in severity for Allamakee County through October. Several storms provided near normal monthly rainfall totals, easing initial extreme drought (D3) to severe drought (…

Ongoing extreme drought (D3), comprised of 7 consecutive weeks of at least severe drought (D2), worsened to exceptional drought (D4) for most of Allamakee County through the middle of September. By September 11th, under a quarter of an inch of rain fell across Allamakee County, m…

The combination of anomalously high temperatures and humidity on Tuesday, August 22nd and Wednesday, August 23rd resulted in maximum heat indices of 103 to 108 degrees in parts of Allamakee County.

Ongoing drier than normal conditions, comprised of 7 consecutive weeks severe drought (D2), worsened to extreme drought (D3) for the entire county through August. During the first half of August, half to 1.5 inches of rain fell across Allamakee County, initially preventing any sp…

Drier than normal conditions resulted in severe drought conditions for 387 square miles of eastern Allamakee County persisting into the middle of July. Increased rainfall of 2 to 4 inches according to volunteer observers resulted in a temporary removal of severe drought condition…

Drier than normal conditions resulted in Severe Drought for 387 square miles or 59% of Allamakee County towards the end of June.

Significant upstream runoff from the combination of heavy rainfall and rapidly melting snow resulted in the fourth highest crest on record in Lansing towards the end of April. Subsequent dry conditions allowed the Mississippi River to slowly recede and drop below minor flood stag…