textproduct: Grand Forks

KEY MESSAGES

- Dangerous heat index values are expected this weekend. Air temps in the mid to upper 90s are expected Saturday, with heat indices ranging from 95-105 degrees. For Sunday and Monday, hotter temperatures are expected, with air temps in the upper 90s to low 100s and heat index values of 105-110 degrees.

UPDATE

Issued at 409 AM CDT Sat Jul 11 2026

Only change was to add heat advisory for the remaining west central MN counties. Heat indices will be 93 to 100 Fergus Falls, Wadena and Elbow Lake and with WBGT temps 80-83 and heat risk level 2 and 3 made sense to expand heat advisory into these areas as similar conditions farther north in MN where heat advisory was issued is the same. A few mid level showers developed around Minot prior to 2 am and a couple remain but are weakening in central ND and DVL area where some low pops thru 11z were added. Blended in a bit lower temps from strict NBM values this weekend as HI of 118 in Hallock seemed a bit high. But it didnt change messaging of dangerous heat. Dayshift will look at headlines for Sunday and Monday.

..Dangerous Heat This Weekend into Monday

Saturday: Air temperatures on Saturday will reach the middle to upper 90s, with dew points in the mid 60s to low 70s. This will allow heat index values to reach the upper 90s to low 100s Saturday afternoon and early evening, with wet bulb globe temps in the middle to upper 80s. This represents High to Extreme heat risk Saturday afternoon. Overnight low temps Saturday night into Sunday morning are expected to remain in the low 70s across most of the area.

Sunday and Monday: Air temperatures Sunday and Monday will be hotter, with most locations seeing upper 90s to low 100s, and dew points in the upper 60s to low 70s. Heat index values are expected to be in the 105-110 degree range, with some locations in the northern Red River Valley seeing a tangible risk of 110-115 degree heat indices. Looking at wet bulb globe temps, widespread upper 80s are expected, representing Extreme heat risk for most of eastern North Dakota, northwest Minnesota, and parts of west-central Minnesota. Additionally, low temps will remain quite warm overnight, with some spots only cooling into the upper 70s Sunday night into Monday morning.

AVIATION /12Z TAFS THROUGH 12Z SUNDAY/

Issued at 640 AM CDT Sat Jul 11 2026

Patchy ground fog at a few sites. Otherwise will be VFR today into tonight and with more wind tonight shouldnt be any ground fog. Few to scattered mid level CU. Winds consistent south- southeast increasing to 10-20 kts most areas, a few higher gusts in E ND this aftn.

FGF WATCHES/WARNINGS/ADVISORIES

ND...Heat Advisory from 11 AM this morning to 9 PM CDT this evening for NDZ006>008-014>016-024-026>030-038-039-049-052>054. Extreme Heat Watch from Sunday morning through late Monday night for NDZ006>008-014>016-024-026>030-038-039-049- 052>054. MN...Heat Advisory from 11 AM this morning to 9 PM CDT this evening for MNZ001>009-013>017-022>024-027>032-040. Extreme Heat Watch from Sunday morning through late Monday night for MNZ001>009-013>017-022>024-027>030-040.