textproduct: Grand Forks

KEY MESSAGES

- Dense fog is forecasted tonight across much of eastern North Dakota and portions of northwestern Minnesota.

- Widespread rain is expected across the region Monday into Tuesday, with high chances for at least 1" of rainfall across southeast North Dakota into west central Minnesota.

- Warmer than normal temperatures continue, particularly Sunday and Monday.

UPDATE

Issued at 1019 PM CDT Sat Oct 31 2026

The main forecast change is the issuance of a dense fog advisory over much of eastern ND and the northern Red River Valley. Fog started forming this afternoon in Barnes and Griggs Counties. Around sunset, fog began expanding. As low level moisture continues to advect northward overnight, dense fog will develop along and north of Highway 2. Recent observations in this area are indicating dropping visibilities, and webcams confirm fog is becoming more prevalent. Advisories are in effect until 6 AM Sunday in the south, 9 AM in the north. However there is uncertainty in when exactly fog will clear. This is especially true near the Canadian border where fog will likely hang on longest and may persist beyond the advisories current expiration time.

..Rain Event Monday/Tuesday

A slow moving H5 trough is expected to deepen as we head into Sunday and Monday. This will bring widespread rain chances into the area through Tuesday, with around an 80 percent chance of at least a half inch of rain across southeast North Dakota and west central Minnesota. Chances decrease further north and west. The heaviest rain will occur in response to a deformation zone that forms as the upper low moves off to the northeast. As such, the track of the low will ultimately determine where the heaviest amounts fall, which could be upwards of 2 inches to 3 inches inside the deformation band. Outside this band, the range will be lower, likely in the 0.5 inch to 1 inch range.

AVIATION /06Z TAFS THROUGH 06Z MONDAY/

Issued at 1145 PM CDT Sat Oct 31 2026

Fog has been expanding northward over the past couple of hours, with LIFR now setting in at KGFK and KDVL. This mixture of IFR and LIFR will continue overnight, with fog, drizzle and low CIGs all bringing a variety of impacts to terminals. Visibilities will improve Sunday morning, taking longest at KDVL and KGFK. CIGs will be slow to rise Sunday morning/afternoon, with the most notable improvement found at KFAR where VFR should return. CIGs will likely fall again into IFR Sunday night at the very end of this TAF period, or more likely just beyond this TAF period.

FGF WATCHES/WARNINGS/ADVISORIES

ND...Dense Fog Advisory until 9 AM CDT Sunday for NDZ006>008- 014>016-026-027-054. Dense Fog Advisory until 6 AM CDT Sunday for NDZ024-028>030- 038-039. MN...Dense Fog Advisory until 9 AM CDT Sunday for MNZ004-007.