Allamakee County, Iowa
Tornadoes, hail, floods and severe storms recorded here between 1958 and 2026, from NOAA's Storm Events Database. Search an address to see which tornadoes came closest to it.
12
Tornado reports
96
Hail reports
70
Floods since 1996
469
All events
2
Deaths
$23.9M
Property damage
Tornado paths in Allamakee County
The part of each tornado’s path NOAA recorded in this county, 11 in all. Zoom in and the paths widen to their surveyed width.
EF0EF1EF2EF3EF4EF5Unrated
Year by year
All storm eventsTornadoes
NOAA's storm database records tornadoes back to 1950 and hail and thunderstorm wind back to 1955, but floods only from 1996 on. Older floods are missing here. For those, the U.S. Geological Survey's stream gauge records and flood reports are the place to look.
Most significant events
The strongest tornadoes, deadliest events and biggest damage here, up to 50.
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.
Excessive Heat Excessive Heat
A period of extreme heat moved into the region during the end of June with widespread heat indices over 100 degrees. On June 29th, heat indices ranged from 110 to 119 degrees across the county during the afternoon and early evening. The highest heat index observed in the county w…
Tornado EF2 Tornado
This strong and long-tracked EF-2 tornado began about 5 miles east of Waukon and continued east-southeast causing a continuous path of tree damage all the way to the Misssissippi River near Lock and Dam 9. The tornado also damaged farm outbuildings and a few residences. Extensive…
Hail Hail
The public reported quarter sized hail in Harpers Ferry.
Hail Hail
Emergency management reported quarter sized hail in Postville.
Winter Weather Winter Weather
The combination of gusty winds and falling snow resulted in near-whiteout conditions at times in Allamakee County during the late afternoon on the 15th through the early morning on the 16th. Snowfall totals across the county ranged from 2 to 5 inches with the highest snowfall tot…
Winter Weather Winter Weather
This snow band brought snow totals of 2 to 6 inches across Allamakee County. The highest reported snowfall total in the county was in New Albin where 5.5 inches was measured.
Winter Storm Winter Storm
This snow band brought heavy snow to Allamakee County with snowfall totals ranging from 8 to 13 inches. The highest reported snowfall total in the county was in Waukon where 13 inches was measured.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Beginning late on January 22nd and into the morning hours of January 23rd, a period of extreme cold moved into the region bringing dangerously cold wind chills. In Allamakee County, wind chills ranged from 30 to 40 degrees below zero with the coldest observed wind chill in the co…
Winter Storm Winter Storm
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.
Flood Flood
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…
Tornado EF0 Tornado
This weak tornado developed near the Iowa-Minnesota state line. In Iowa, the tornado damaged some large tree limbs near Pool Hill Drive west of New Albin before crossing the state line into Minnesota.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Minimum wind chills across Allamakee County ranged from 25 to 35 degrees on the morning of February 18th.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
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,…
Drought Drought
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…
Hail Hail
Emergency management reported nickel sized hail 2 miles east of New Albin.
Thunderstorm Wind Thunderstorm Wind
Emergency management reported tree branches down on State Highway 26.
Excessive Heat Excessive Heat
Anomalously warm air temperatures and high humidity allowed the heat index to reach 119 degrees at Yellow River State Forest on August 26th.
Tornado EF1 Tornado
This EF-1 tornado damaged mainly trees along its path about 5 miles north of Waukon. One home had a garage roof taken off and several outbuildings/vehicles were damaged as well.
Thunderstorm Wind Thunderstorm Wind
The public reported a large tree snapped at the base.
Flood Flood
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.
Flood Flood
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.
Flood Flood
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.
Flood Flood
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.
Flash Flood Flash Flood
Emergency management reported mudslides along Highway 26 outside of Lansing.
Thunderstorm Wind Thunderstorm Wind
Emergency Management reported trees down near Dorchester.
Thunderstorm Wind Thunderstorm Wind
Trees were reported down in the Yellow River area. Large amounts of dust and dirt were kicked up as well.
Thunderstorm Wind Thunderstorm Wind
A 59 mph gust was measured near Postville.
Thunderstorm Wind Thunderstorm Wind
Trees were reported down on an RV, and another RV was tipped over at the Scenic View Campground.
Flash Flood Flash Flood
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.
Flash Flood Flash Flood
A couple of small mudslides were reported near Lansing. Clear Creek was also reported to be out of its banks.
Thunderstorm Wind Thunderstorm Wind
A trained spotter reported a tree split in half that destroyed a recreational vehicle.
Winter Weather Winter Weather
Volunteer observers reported 2 to 7 of snow accumulation in Allamakee County with a maximum of 7.0 in Waukon and near Lansing.
Drought Drought
Slightly above normal total monthly rainfall resulted in alleviation of severe (D2) drought in Allamakee County through April.
Drought Drought
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.
Drought Drought
Total liquid precipitation of 0.75 fell in Allamakee County through February, more than 0.5 below normal, resulting in severe (D2) drought persisting.
Winter Storm Winter Storm
A volunteer observer reported 7.5 of snowfall in Harpers Ferry.
Winter Storm Winter Storm
A volunteer observer reported 8.9 in Postville.
Drought Drought
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…
Drought Drought
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.
Winter Weather Winter Weather
Volunteer observers reported 1.3 to 2.0 inches of snowfall across Allamakee County with the highest amount reported near Harpers Ferry.
Drought Drought
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…
Events by year, as a table
| Year | Events | Tornadoes |
|---|---|---|
| 2026 | 8 | 1 |
| 2025 | 5 | 1 |
| 2024 | 25 | 1 |
| 2023 | 13 | 0 |
| 2022 | 6 | 1 |
| 2021 | 6 | 0 |
| 2020 | 4 | 0 |
| 2019 | 15 | 0 |
| 2018 | 14 | 0 |
| 2017 | 10 | 0 |
| 2016 | 18 | 0 |
| 2015 | 15 | 0 |
| 2014 | 21 | 0 |
| 2013 | 21 | 0 |
| 2012 | 19 | 0 |
| 2011 | 6 | 0 |
| 2010 | 10 | 0 |
| 2009 | 19 | 0 |
| 2008 | 17 | 0 |
| 2007 | 16 | 0 |
| 2006 | 10 | 0 |
| 2005 | 7 | 0 |
| 2004 | 13 | 0 |
| 2003 | 6 | 0 |
| 2002 | 15 | 1 |
| 2001 | 12 | 0 |
| 2000 | 28 | 1 |
| 1999 | 7 | 0 |
| 1998 | 18 | 0 |
| 1997 | 13 | 0 |
| 1996 | 24 | 0 |
| 1995 | 2 | 0 |
| 1994 | 8 | 2 |
| 1992 | 1 | 0 |
| 1991 | 2 | 0 |
| 1990 | 3 | 0 |
| 1987 | 2 | 1 |
| 1986 | 1 | 0 |
| 1985 | 1 | 0 |
| 1983 | 5 | 0 |
| 1979 | 1 | 0 |
| 1978 | 1 | 0 |
| 1975 | 2 | 1 |
| 1974 | 6 | 0 |
| 1973 | 1 | 0 |
| 1971 | 1 | 0 |
| 1969 | 1 | 0 |
| 1966 | 2 | 1 |
| 1965 | 2 | 0 |
| 1964 | 1 | 1 |
| 1963 | 2 | 0 |
| 1961 | 2 | 0 |
| 1958 | 1 | 0 |
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See every tornado that passed within 25 miles of a place in Allamakee County, measured to its path.
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