textproduct: Glasgow

KEY MESSAGES

- Cooler weather this week, with a brief warmup on Tuesday.

- Lake Wind Advisory wind gust criteria will likely be met Monday through Wednesday.

- Unsettled weather pattern looks to bring chances for rain through the end of the week.

DISCUSSION

WEATHER PATTERN OVERVIEW:

Upper level ridging continues to build over the west coast and is pushing into western Montana. This afternoon a weak frontal passage brings a low end opportunity for a light, passing rain shower.

On Monday the upper level ridge remains over western Montana. This will bring warm temperatures with dry weather to the area on through the day on Tuesday. By Tuesday night a surface low will drop south into along the international border across eastern Montana and North Dakota followed by a Canadian cold front Wednesday morning. How much precipitation we'll see from this frontal passage is still very uncertain. Additional waves will keep PoPs elevated through the weekend.

FORECAST CONFIDENCE & DEVIATIONS: Lowered RH slightly tomorrow and Monday, blended 33% NBM90 for day 1-3 wind gusts.

High confidence in winds meeting Lake Wind Advisory criteria.

Moderate confidence in accumulating precipitation occurring with the shortwave trough on Tuesday night into Wednesday.

AVIATION

LAST UPDATE: 0600Z

FLIGHT CAT RANGE: VFR

DISCUSSION: Low chances for scattered light rain. Scattered to few low to mid level clouds through 12Z. Overcast skies and low VFR ceilings during the day tomorrow.

WIND: WNW winds 5 to 10 kts, after 0Z becoming NE. E winds at 10 to 15 knots after 05Z.

GGW WATCHES/WARNINGS/ADVISORIES

None.