textproduct: Grand Forks

KEY MESSAGES

- Widespread soaking rains are expected today into Tuesday morning. An axis of heavy rain with 90 percent chance of 1 inch or more and 60 percent chance of 2 inches or more forecast roughly Bismarck-Grand Forks/Mayville thru Thief River Falls to Roseau/Baudette. WPC has this zone in region of slight risk of excessive rain.

..Synopsis

Mid level clouds continue to work slowly to the east this afternoon, with otherwise mostly clear skies. Look for increasing cloud cover tonight as our next system approaches the region. H5 upper low will move into the Northern Plains on Monday, into an environment supportive of moderate to heavy rain. Mixing ratios range from 10-12 g/Kg by Monday afternoon, with a relatively strong theta-e gradient boundary stretching from southwest to northeast across the eastern half of North Dakota. Embedded thunderstorm activity is expected as CAPE values will be in the 300-700 J/Kg range. Areas along an axis from Cooperstown to Grand Forks, to Roseau have the best chances for 1 or more inches of rain (80-90%), with slightly lower chances on either side. High temperatures on Monday will be in the upper 50s along the International Border, with low 70s in the southern Red River Valley. Heading into Tuesday, rain gradually moves off to the east, with minimal chances for precipitation through the remainder of next week. Cooler temperatures are expected from Thursday onward, with highs in the 50s to low 60s and lows in the upper 30s to mid 40s.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 1152 AM CDT Mon Sep 28 2026

Showers and general thunderstorms will continue to move north and east today bringing moderate to heavy rain to much of Eastern North Dakota and Northwest Minnesota. This is expected to bring widespread MVFR and IFR conditions. Ceiling reductions will be more widespread with reductions to visibility occurring during times of precipitation. Tonight into Tuesday morning brings the potential for fog and LIFR conditions. The best chance for fog is from the Devils Lake Basin into far Northwest Minnesota. Starting Tuesday morning conditions will begin to clear from west to east as rain moves out of the region.

FGF WATCHES/WARNINGS/ADVISORIES

ND...None. MN...None.