textproduct: Grand Forks

KEY MESSAGES

- Dangerous heat index values likely this weekend into Monday. The hottest temperatures are expected Sunday and Monday, with heat indices of 100 to 110 degrees likely.

UPDATE

Issued at 958 AM CDT Fri Jul 10 2026

The forecast remains on track this morning with only a few elevated showers working across Otter Tail County. Look for mostly clear skies through early afternoon with slightly higher cloud cover this afternoon during peak heating. Highs are on track to climb into the middle to upper 80s.

UPDATE Issued at 524 AM CDT Fri Jul 10 2026

Extreme Heat watch remains in effect Sunday & Monday. Confidence remains high in the watch area for heat indices of 105 or higher for several hours Sunday & Monday. Isolated storms remaining in SE ND will diminish. Global models didnt handle Thursday t-storm evolution well and had too high pops this early morning in NW MN and thru the day in west central MN. Compromised with MPX/DLH offices and kept a 20-30 pop for isold t-storm thru the day Bemidji-Fergus Falls. Day 1 SPC outlook shifted marginal risk a bit south and only scrapping parts of Grant and Otter Tail counties. Will not message severe risk as I do think it is very low.

..Dangerous Heat This Weekend into Monday

Strong ridging is in the process of strengthening over the Central Rockies, and is expected to build to the north and east through this weekend. Anomalous heights upwards of 600dM are being highlighted by the majority of ensemble members, allowing temps to climb well into the 90s on Saturday, then approach the 100 degree mark on Sunday and Monday. With dew points in the upper 60s to low 70s, heat index values are expected to reach 100 degrees or higher, especially Sunday and Monday as the ridge axis aligns atop the Northern Plains. Wet bulb globe temps will climb into the upper 80s Sunday and Monday, signifying high to extreme categorical heat risk both days.

AVIATION /12Z TAFS THROUGH 12Z SATURDAY/

Issued at 639 AM CDT Fri Jul 10 2026

Kept TAFs pretty much 1 line for all sites today. Winds will be variable but mostly end up being south-southeast 5 kts or so thru tonight. A few CU or mid cloud CU the next 24 hours.

FGF WATCHES/WARNINGS/ADVISORIES

ND...Extreme Heat Watch from Sunday morning through late Monday night for NDZ006>008-014>016-024-026>030-038-039-049- 052>054. MN...Extreme Heat Watch from Sunday morning through late Monday night for MNZ001>005-007-008-013>015-029-030-040.