textproduct: Glasgow

KEY MESSAGES

- Southeast winds will gradually relax over the Fort Peck Lake area and surrounding areas on Tuesday.

- A wintry mix of rain and some wet snow will lift NE on Tuesday along with some patchy fog and low clouds.

- Chances for precipitation return near the end of the week.

DISCUSSION

East to southeast winds continue howling across Fort Peck Lake with a Lake Wind Advisory set to expire at 4AM MDT Tuesday. Those winds will relax during the day Tuesday as a wintry mix lifts northeast across NE Montana. Ensembles continue to show a range of QPF between 0.10" and 0.25" for most, though little or no snow accumulation is expected save for nominal totals over higher terrain, near the Canadian border, and typical colder surfaces such as open fields and car tops.

Midweek, a Pacific Northwest upper low will persist with preceding Southwest flow aloft over NE Montana and surrounding regions. Eventually as this trough translates eastward, precipitation chances will likely make a comeback late in the week or toward the upcoming weekend. However precipitation performs over the region, this general pattern does also spell a continuation of below normal temperatures through the week.

FORECAST CONFIDENCE & DEVIATIONS:

NBM was cheered on for this forecast period capturing the colder temperatures expected for the week as well as the wintry mix for Tuesday and the renewed chances for precipitation late week. Confidence remains a bit below average on specific precipitation amounts and precipitation type given marginal thermal profiles in place. Only changes to the baseline involved visiting with near term winds over the Fort Peck Lake area which continue to exceed expectations and most guidance. Blending in a little higher resolution ensemble in with the NBM allowed for an upward adjustment followed by a nudge toward trends and observations.

AVIATION

LAST UPDATED: Tuesday October 27, 2026 at 0500Z

FLIGHT CAT RANGE: MVFR - IFR

DISCUSSION: A wintry mix will lift northeast across area terminals with patchy fog and low stratus at times. As such, look for reduced ceilings and visibilities lending to mainly MVFR/IFR conditions.

WIND: SE winds will continue at 15 to 20 kts, gusting to 30 kts will diminish and become light and variable around 18Z, before turning west at 5 to 15 kts in the afternoon hours.

GGW WATCHES/WARNINGS/ADVISORIES

Lake Wind Advisory until 4 AM MDT Tuesday for Central and Southeast Phillips-Central and Southern Valley-Garfield-McCone- Petroleum.