A warm front will linger over the Northland tonight and into Tuesday.
Southerly winds will bring warm air and moisture near the front, accompanied by a strong southwesterly low-level jet of 30 to 45 knots. This, along with lift near the boundary, steep mid-level lapse rates, and increased elevated instability (CAPE), will lead to scattered showers and thunderstorms tonight.
Chances for storms decrease on Tuesday as the low-level jet weakens.
A few strong storms could develop tonight, with hail likely staying under one inch in diameter. However, heavy rainfall is expected to be the main concern with these storms.
There are still some discrepancies among the computer models regarding the placement of the axis with the heaviest rainfall tonight. However, there has been a slight shift northward, with areas north of Duluth now more likely to see 1 to 2 inches or more of rain.
Rain chances in Duluth are highest later this evening and overnight, with potential totals ranging from around a quarter to half an inch. While there’s still a possibility of higher amounts, that likelihood has slightly decreased compared to 24 hours ago.
Patchy fog could form in parts of the Northland early Tuesday morning, but there’s a higher likelihood of fog Tuesday night into Wednesday morning, particularly in the areas marked in darker colors on the map, indicating visibility less than 1 mile.
Over the past week, some parts of the Northland have experienced significant rainfall, with precipitation totals reaching 130 to over 200 percent of the average. However, there have also been areas with much less rain, including far northern Minnesota, sections of the North Shore of Lake Superior from Two Harbors northeast, and a small area along the South Shore of Lake Superior.
Note: Some of the rain expected tonight should fall on areas that have been the driest this month.
Note: Hibbing, Minnesota tied its record low of 29 degrees for September 8th this morning, a record originally set in 2006. The streak of record-breaking cold is over for now.
Over the last 14 days, we’ve seen plenty of cold air for this time of year anywhere east of the Rockies, with the green, blue, and purple areas on the map below representing temperature departures between -6 and -12 degrees below average.
Meanwhile, the heat has been persistent during this same time in the Pacific Northwest, with temperature departures running between +6 and +12 degrees above average.
Looking ahead, much of the dark green and blue on the map will likely fade away as a warmer pattern begins to take shape.
From August 24 to September 7, 2025, this period ranks as either the coldest or among the top five coldest in 133 years of records in the areas shown in darker blue on the map. Meanwhile, the same period has been the hottest or among the top five hottest in the Pacific Northwest, marked in red on the map.
In northeast Minnesota, the period from August 24 to September 7, 2025, was noted as the fourth coldest on record for the climate district, with data going back to 1893.
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