textproduct: Grand Forks

KEY MESSAGES

- There is a level 2 out of 5 risk for severe weather this afternoon and evening, with golf ball sized hail and 70 mph wind gusts the primary threats. Isolated tornadoes are possible. - Heat advisory for parts of eastern North Dakota and west central Minnesota Saturday, and even more widespread on Sunday. There is a 40 percent chance for heat index values over 105 in the southern Red River Valley on Sunday.

..Heat impacts this weekend

Ridging continues to build over the next few days, with 850mb temps near 30 C nudging into southern ND. Some high level smoke might keep temps down a few degrees, and with a shortwave coming over the top of the ridge Saturday night into Sunday, can't rule out some clouds that could also keep temperatures down in a bit. However, the probability of maximum temperatures over 90 is 90 percent or greater for all but our far northern and eastern tier both Saturday and Sunday. Apparent temperatures get to 100 degrees in portions of east central and southeastern ND and west central MN tomorrow, with even more widespread heat index values above criteria on Sunday. There is about a 40 percent chance for heat index values over 105 Sunday, and wet bulb globe temperatures get above 80 in many areas. Not confident enough for a warning at this point but could see some areas approaching it on Sunday. Have a heat advisory for a limited area tomorrow and across all but the Devils Lake Basin and Lake of the Woods area on Sunday.

AVIATION /18Z TAFS THROUGH 18Z SATURDAY/

Issued at 1243 PM CDT Fri Jul 24 2026

MVFR stratus continues to hang on at KGFK and the MN airports, but should scatter out in the next hour or so and become VFR. Winds will continue to gust out of the southwest at 25 kts through this afternoon. Convection is possible late this afternoon and evening, although still uncertainties as to exactly where storms will develop. Have some prob30 groups at all of the TAF sites, and while there could be some brief drops to MVFR think most of the ceilings and vis will stay VFR unless a stronger cell goes right over the airport. Behind the convection, should be a return to some scattered high clouds and winds becoming light and variable, with some turn to the northwest at KDVL. High smoke should not impact the TAF sites and at this point it seems the worst of the surface smoke will stay west of our airports, so will keep mention out for now.

FGF WATCHES/WARNINGS/ADVISORIES

ND...Heat Advisory from 1 PM Saturday to 9 PM CDT Sunday for NDZ024- 026>030-038-039-049-052-053. Heat Advisory from 1 PM to 9 PM CDT Sunday for NDZ008-016. MN...Heat Advisory from 1 PM Saturday to 9 PM CDT Sunday for MNZ001>003-029-030-040. Heat Advisory from 1 PM to 9 PM CDT Sunday for MNZ004-007>009- 013>017-022>024-027-028-031-032.