As expected, all off the weekend’s rain stayed west of the Twin Ports, and this pattern should continue through much of Monday. However, the chances for rain will increase Monday night into early Tuesday morning, with a few additional showers possible Tuesday afternoon. The bulk of the rainfall from this system in the Twin Ports is expected Monday night into early Tuesday morning.
Note: Patchy fog may develop tonight, particularly near Lake Superior and the Twin Ports, and could persist until mid to late Monday morning.
There is some instability (CAPE) with this approaching system, so we can expect embedded thunderstorms across the Northland from Monday into early Tuesday morning. While the risk of severe storms is low, heavy downpours are likely to be the primary concern, with isolated hail up to 1″ in diameter and gusty winds up to 45 mph as secondary hazards Monday and Monday night.
Over the next few days, a cold front will move eastward from the northern Plains, expected to pass through the Northland Tuesday afternoon into Tuesday night. An associated area of low pressure will track northeast from the northern Rockies toward Manitoba by Tuesday.
Here’s the rainfall forecast through 7 PM Monday.
Scattered showers are possible in the western and northern areas; however, precipitation is expected to remain west of northwest Wisconsin, the North Shore, and the Twin Ports through Monday afternoon.
From Monday night into Tuesday morning, northeast Minnesota and northwest Wisconsin are expected to experience widespread showers and scattered thunderstorms, with rainfall amounts possibly reaching 0.5 to 1 inch or more by Tuesday afternoon.
Goes-19 infrared satellite loop from Sunday, September 6, 2026, covering 1:25 PM to 4:20 PM CT.
Some of the convection in west-central Minnesota this afternoon shows cloud top temperatures as low as -65 to -70°C, indicating very deep convection with torrential rainfall rates of 1-2″+/hour.
The yellow, orange, and red areas on the map below show rainfall totals of 1 to 3 inches or more over the past six hours, ending at 4 PM CT today, Sunday, September 6, 2026.
MRMS radar loop through 4:36 PM CT on Sunday, September 6, 2026.
The weather pattern is active, featuring two strong troughs—one over the western U.S. and another across the northeastern U.S.—while a ridge dominates the central and southern Plains today.
GOES-19 water vapor loop from Sunday, September 6, 2026, ending at 4:50 PM CT.
If you’d like to support my work, please consider making a donation below. Thank you!
Make a one-time donation
Make a monthly donation
Make a yearly donation
Choose an amount
Or enter a custom amount
Your contribution is appreciated.
Your contribution is appreciated.
Your contribution is appreciated.
Since mid-August, Duluth has experienced a notable increase in rainfall frequency, with 10 days recording a minimum of 0.01 inch of precipitation, including 5 days exceeding 0.25 inches and 3 days surpassing 0.50 inches.
The rainfall in Duluth from August 16 to September 5, 2026, totaled 3.42 inches, representing 135% of the normal amount for that period.
Green areas on the map indicate above-average rainfall over the past three weeks, while yellow and orange areas indicate below-average rainfall during the same period.
