Area Forecast Discussion
Issued by NWS Glasgow, MT
Issued by NWS Glasgow, MT
452 FXUS65 KGGW 231937 AFDGGW Area Forecast Discussion National Weather Service Glasgow MT 137 PM MDT Mon Sep 23 2024 .DISCUSSION... KEY MESSAGES: - A warm up to the 80s/low 90s Wed then stepping cooler through the weekend. - Dry conditions are expected despite a couple cool fronts. WEATHER PATTERN OVERVIEW: Progressive upper ridge will move into the Northern Rockies Tuesday, then into the northern Plains Wednesday. This will allow for +20C at 850 mb to enable 80s and low 90 degree temps to move into the CWA. Being that the area received some rainfall in the past week, and very little wind is expected, fire weather concerns are minimal at this point. A couple weak cold front then move through with the first on dropping through Wednesday Night. This will knock high temperatures Thursday into the 70s west to the mid 80s over the Yellowstone Valley. Another cold front moves through late Saturday, kncoking temps down from NW to SE with highs Sunday in the 60s NW to 70s SE. Further cooling is possible Monday. Rain chances look minimal late in the period as an upper trough over the Gulf of Alaska weakens as it moves east. TFJ FORECAST CONFIDENCE & DEVIATIONS: Temperature spread increases for late in the week with uncertainty regarding positioning of west coast trough and track of shortwaves ejecting from said trough. These differences will also have an impact on precipitation chances, although in general the forecast is expected to be mostly dry. && .AVIATION... FLIGHT CATEGORY: VFR A few high level cumulus clouds this afternoon will disappear along with the NW winds. Tuesday will feature some clouds above 12K feet with light west winds (less than 10 kts). TFJ && .GGW WATCHES/WARNINGS/ADVISORIES... None. && $$ weather.gov/glasgow