An arctic airmass settling over the region produced some heavy lake effect snow and extreme cold conditions across much of the UP from the 15th through the 20th.
Every event with a place to put it; 11 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 MQT wrote it up.
An arctic airmass settling over the region produced some heavy lake effect snow and extreme cold conditions across much of the UP from the 15th through the 20th.
The national radar mosaic for the moment the first event began.
6 cold/wind chill, 5 lake-effect snow. Local standard time, as filed.
A public report of 12.5 inches of snow 5 miles southeast of Mount Arvon by 7 AM on the 16th. Key impacts: travel delays, road closures.
The official observation at the NWS office in Negaunee Township from 7 PM on the 15th to 1 PM on the 16th was 14 inches and counting. Other public reports included 13 inches by 8:30 AM on the 16th 4 miles northeast of Negaunee, 14.5 inches 5 miles north of Negaunee by 10 AM on the 16th, 18 inches 8 miles north of Negaunee by 1 PM on the 16th, and 12 inches estimated 9 miles south-southeast of Big Bay by 7 PM on the 16th. Key impacts: travel delays, road closures.
Periods of lake effect snow occurred between the 16th and the 20th. The most severe conditions occurred on the 16th and 17th when the combination of heavy snow and winds gusting to 40 mph resulted in limited visibility and a road closure on M-28 between Shingleton and Seney. Munising received around 12 inches of snow from the afternoon of the 16th through the morning of the 18th. Key impacts: transportation delays, road closures.
Periods of lake effect snow occurred between the 16th and the 20th. The most severe conditions occurred on the 16th and 17th when the combination of heavy snow and winds gusting to 40 mph resulted in limited visibility and a road closure on M-28 between Shingleton and Seney. Key impacts: transportation delays, road closures.
The AWOS at the Delta County Airport (KESC) reported a wind chill of -21 degrees at 8 AM on the 17th. The mesonet station AW433 Rock reported a wind chill of -20 degrees 9 AM on the 17th. The Delta County Airport AWOS reported a wind chill of -24 degrees the morning of the 18th. The mesonet stations AW433 Rock, MC036 Trenary MDOT, and 7361D Garden all reported wind chills of -20 degrees between 6 AM and 9 AM on the 18th.
The mesonet station OJIM4 Ojibway - Isle Royale reported a wind chill of -26 degrees at 8:30 AM on the 17th and a wind chill of -29 degrees at 7:30 AM on the 18th.
The mesonet station DVI04715 Iron River reported a wind chill of -25 at 5 AM on the 18th.
The AWOS station at the Marquette Sawyer Regional Airport (KSAW) reported a wind chill of -26 degrees at 2 AM on the 18th.
The AWOS station at the Menominee Regional Airport reported a wind chill of -20 degrees at 8 AM the morning of the 18th.
The AWOS station at the Gogebic-Iron County Airport (KIWD) reported a wind chill of -29 at 8 AM on the 18th. THe MDOT Mesonet station at Wakefield reported a wind chill of -25 at 9:30 AM on the 18th.
A public report 3 miles west of Sundell reported 16 inches of total snowfall from 7 AM on the 19th to 8:30 AM on the 20th, with 11 inches falling by 9 PM on the 19th and the remainder falling overnight into the following morning. Visibility was sharply reduced on M28 between shot point and Harvey the morning of the 19th. Key impacts: travel delays.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2025Every state in 2025This day in weather historyWarnings in Michigan, 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 2026-10-01. Each event’s entry at NCEI: 1239229, 1239230, 1239614, 1239616, 1239234, 1239238, 1239237, 1239239, 1239242, 1239236, 1239232.