An arctic airmass moved into the Upper Mississippi River Valley on February 17th, bringing dangerously cold wind chills along with it. The coldest period was during the morning hours on February 18th when wind chills fell as low as 30 to 45 degrees below zero in some locations.
Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS ARX wrote it up.
An arctic airmass moved into the Upper Mississippi River Valley on February 17th, bringing dangerously cold wind chills along with it. The coldest period was during the morning hours on February 18th when wind chills fell as low as 30 to 45 degrees below zero in some locations.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS La Crosse, WI wrote its last area forecast discussion before the first event at Feb 17, 5:36 PM CST, 3 hours 24 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
7 extreme cold/wind chill. Local standard time, as filed.
Minimum wind chills on the morning of February 18th fell to between 35 to 45 degrees below zero. The coldest observed wind chill in the county was 41 degrees below zero just east of Kasson.
Minimum wind chills on the morning of February 18th fell to between 30 to 40 degrees below zero. The coldest observed wind chill in the county was 40 degrees below zero at Canton.
Minimum wind chills on the morning of February 18th fell to between 25 to 35 degrees below zero.
Minimum wind chills on the morning of February 18th fell to between 25 to 35 degrees below zero. The coldest observed wind chill in the county was 43 degrees below zero at Dexter.
Minimum wind chills on the morning of February 18th fell to between 30 to 40 degrees below zero. The coldest observed wind chill in the county was 40 degrees below zero at Eyota.
Minimum wind chills on the morning of February 18th fell to between 25 to 40 degrees below zero. The coldest observed wind chill in the county was 36 degrees below zero at Lake City.
Minimum wind chills on the morning of February 18th fell to between 25 to 40 degrees below zero. The coldest observed wind chill in the county was 40 degrees below zero at Ridgeway.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2025Every state in 2025This day in weather historyWarnings in Minnesota, February 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 1237786, 1237787, 1237788, 1237789, 1237790, 1237791, 1237792.