Area Forecast Discussion
Issued by NWS Glasgow, MT
Issued by NWS Glasgow, MT
798 FXUS65 KGGW 231934 AFDGGW Area Forecast Discussion National Weather Service Glasgow MT 134 PM MDT Sat Aug 23 2025 .DISCUSSION... KEY MESSAGES: - Near to below average temperatures through Monday then above normal temps the remainder of the week. - Monsoonal moisture may make a return near the end of the month. WEATHER PATTERN OVERVIEW: With surface high pressure and northwest upper level flow aloft, the quiet period will remain in place at least into Wednesday. Surface high pressure over the Canadian Prairies will drop into the northern Plains tonight. This will turn the surface winds to the east. Temperatures will peak about Wednesday then remain there, above average through the remainder of the forecast period. On Thursday, there is moderate (50 percent) confidence that monsoonal moisture will move into Montana from the south and increase clouds. There is low (20 percent) confidence on precipitation occurring with this moisture. FORECAST CONFIDENCE & DEVIATIONS: Decreased temps a bit with NBM25 for tonight, otherwise rode with the NBM through the forecast. TFJ && .AVIATION... UPDATED: 1935Z FLIGHT CAT RANGE: VFR. DISCUSSION: Quiet weather with afternoon cumulus diminishing by this evening. WINDS: North winds to about 10 kts near 00z will diminish tonight except KGGW. Winds here will turn clockwise to the East. TFJ && .GGW WATCHES/WARNINGS/ADVISORIES... None. && $$ weather.gov/glasgow