textproduct: Grand Forks

KEY MESSAGES

- Dense fog is expected through mid-morning.

UPDATE

Issued at 656 AM CDT Sun Aug 31 2025

While not all spots in the Dense Fog Advisory are socked in, especially on the edges of the deck, many are very foggy. Will keep an eye on the finger of stratus seen on satellite reaching towards Grand Forks and Thief River Falls, but for now will keep the headline as it is.

..Fog this morning

Winds are mostly light but have enough southerly to southeasterly fetch to bring plenty of moisture north into our CWA. Fog has already developed from the SD border up towards Devils Lake. While so far web cams are still rather patchy, there is more consistency in the high-res ensembles and HREF probabilities are up to 70 percent for less than a half mile visibility. This is mostly in southeastern to east central ND, which fits current observation and satellite trends so far. For now have an advisory southwest of a Devils Lake to Hillsboro to Fergus Falls line, but may need to expand depending on how far east the more dense fog gets in the next few hours.

AVIATION /12Z TAFS THROUGH 12Z MONDAY/

Issued at 656 AM CDT Sun Aug 31 2025

LIFR conditions at KFAR and KDVL, although the latter has had some improvement in the last hour or so. Should see some improvement to the fog in the next few hours at the southern and western airports, while KGFK and the MN side could see some drops down to MVFR visibility down for an hour or so. All sites should become VFR by 15 or 16Z, with light southeasterly winds below 10 kts.

FGF WATCHES/WARNINGS/ADVISORIES

ND...Dense Fog Advisory until 10 AM CDT this morning for NDZ014-015- 024-026-028>030-038-039-049-052-053. MN...Dense Fog Advisory until 10 AM CDT this morning for MNZ003-029- 030-040.