Duluth, MN – Rain and thunderstorms arriving late Saturday could quickly turn into a flooding concern across northern Minnesota by Sunday night, especially along the Lake Superior shoreline where melting snow is already pushing water levels higher.
Conditions will begin to shift Saturday afternoon, with showers developing and expanding into the evening hours. By Sunday, warmer air moving into the region will help fuel thunderstorms, some of which could become strong, particularly across northwest Wisconsin and parts of the Northland.
According to the National Weather Service in Duluth, rainfall totals through early Monday could reach around 0.5 to 1.5 inches across much of the region, including Duluth, Two Harbors, Grand Marais, and inland areas like Hibbing and International Falls. While these totals alone may not cause widespread flooding, the added effect of ongoing snowmelt increases the risk of rivers and streams rising quickly.
The most vulnerable areas include the North Shore of Lake Superior and the South Shore into Wisconsin, where runoff from melting snowpack is already feeding into waterways. Area streams and low-lying roads could see water levels rise rapidly by Sunday night into early Monday.
Temperatures climbing into the 60s and even low 70s on Sunday will accelerate snowmelt, compounding the flood risk. Areas of heavier rain may also reduce visibility for drivers and create ponding on roadways during peak travel times.
After a brief lull Monday, additional rain and a few thunderstorms are expected to redevelop late Monday into Tuesday. Some mixed precipitation could occur in parts of northeastern Minnesota midweek, though little to no accumulation is expected.
Residents are encouraged to monitor local water levels and remain alert for changing conditions through early next week. Flooding concerns may increase quickly if heavier rain bands develop or persist over the same areas.
