textproduct: Grand Forks

KEY MESSAGES

- Cooldown for Thursday through the weekend. Near normal temperatures with highs in the mid 50s to low 60s F and lows in the mid 30s to mid 40s F.

- Low to medium chance (20-50%) for precipitation Saturday. Accumulations are expected to remain under 0.25 inches.

UPDATE

Issued at 1246 PM CDT Wed Sep 30 2026

Fog has since dissipated.

Increased temperatures in southeast ND some as rate of increase in temperatures is currently exceeding previous forecast values. Here, locations here liable to touch 80F this afternoon.

Still expecting a dry cold front to move through this afternoon and early evening somewhat unsuspectingly. This will introduce cooler temperatures starting tonight. While cooler temperatures into the upper 30s are forecast tonight in northeast ND, a steady light breeze behind the front is expected to prevent temperatures from tanking via radiational cooling. This will limit the chance for frost.

Frost becomes more likely Thursday night into Friday as surface high pressure centers itself more into our region keeping winds calm and skies clear. Best chance for fog currently resides in northeast ND and northwest MN, but areas generally north of I-94 also hold a medium chance of seeing frost.

UPDATE Issued at 702 AM CDT Wed Sep 30 2026

Lingering low clouds only in the far east fcst area yet at 12z including Park Rapids to Wadena. Behind it it cleared out and webcams show patchy ground fog Fergus to Fosston. Otherwise skies mainly clear with a few cirrus along the International border. No forecast issues today. A warm day with highs mid 60s to mid 70s.

DISCUSSION

Issued at 314 PM CDT Tue Sep 29 2026

Zonal flow will prevail through Wednesday with continued above average high temperatures ranging from the mid 60s F in the north to mid 70s F in the south. Surface low pressure over Canada will move into the Hudson Bay region Wednesday bringing in high pressure and cooler temperatures behind it by Thursday morning. From Thursday through the weekend, seasonable temperatures with highs in the mid 50s to low 60s F and lows in the mid 30s to mid 40s F are expected.

The next chance for precipitation is Saturday as a 500 mb wave from Montana moves southeast. Atmospheric lift and southerly winds advecting in moisture will be enough to bring 20-50% precipitation chances with the highest chances being in Northwest Minnesota. This event is expected to be minor with a 10-40% chance of getting greater than 0.25 inches of rain. High pressure moving in behind the Saturday system is expected to bring cooler overnight lows Sunday and Monday with temperatures in the 30s F. Monday morning looks the coolest, though the chance for a freeze remains low (0-30%) for much of region.

As we move into next week, especially Tuesday, ensemble systems are generally indicating that above average heights will return to the region bringing above average temperatures. From the Red River Valley and west, there is a 30-60% chance of seeing a high temperature of 70 F or greater Tuesday. Dry conditions are also favored for next week.

AVIATION /18Z TAFS THROUGH 18Z THURSDAY/

Issued at 1246 PM CDT Wed Sep 30 2026

High confidence in VFR conditions are forecast throughout the TAF period.

A dry cold front will move through the region this afternoon into early evening. This will abruptly shift winds from westerly to north/northwesterly. Winds are not forecast to be particularly gusty with this frontal passage, generally under 15kt. There could be some sprinkles/very light rain showers near and just behind the front.

A steady light breeze tonight/Thursday morning should prevent fog from developing.

Winds increase tomorrow late morning and afternoon, this time with gusts in the 20-30kt range.

FGF WATCHES/WARNINGS/ADVISORIES

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