textproduct: Grand Forks

KEY MESSAGES

- Above average temperatures persist this week, with heat impacts possible on Wendesday.

- Isolated severe storms possible Thursday.

UPDATE

Issued at 431 AM CDT Tue Jul 28 2026

Ground fog which initially formed in the Devils Lake basin has expanded and fog layer lifted so that we are seeing more widespread dense fog over the northern Red River valley and thru the Devils Lake, Cando areas to New Rockford. Patchy fog may develop in other locations into Minnesota as well as we approach sunset.

..Heat wave continuing and rain chances mid-week

One of the weak embedded shortwaves coming over the top of the ridge has started to produce some showers and thunderstorms in or near north central ND. SPC meso page has decent 1000 to 1500 J/kg of ML CAPE and shear around 40 kts, but with very weak forcing, and extremely warm mid-level temps, the cells that are developing are struggling. CAMs have that trend continuing with the next weak shortwave arriving later this evening, and this seems reasonable. Our northwestern counties could see a few sprinkles this afternoon and evening, but substantial precipitation will hold off until Wednesday/Thursday as NBM probabilities of at least a tenth of an inch of rain finally rise above 50 percent. ECMWF EFI continues to show a signal for heat continuing through the weekend, and NBM probabilities for temperatures over 95 degrees are over 70 percent for Wednesday. Likely will need heat headlines of some sort again Wednesday so will continue to monitor.

AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/

Issued at 650 AM CDT Tue Jul 28 2026

Patchy fog to start the day with the Devils Lake area seeing the most impacts. Light winds may keep the fog from burning off as fast as it would normally, but also though got some sun above it. So the progression of visibility improvement at KDVL airport is approximate with dense fog thru 14z then improving conditions. Rest of the TAF sites seeing pretty good start with some lower vsbys in haze or light fog but that will be short lived. Balance of the day is VFR with scattered mid and high clouds and upper level smoke. Light winds all day so direction could be from just about anywhere.

FGF WATCHES/WARNINGS/ADVISORIES

ND...Dense Fog Advisory until 10 AM CDT this morning for NDZ006>008- 014>016-024-026-054. MN...Dense Fog Advisory until 10 AM CDT this morning for MNZ004-007.