Area Forecast Discussion
Issued by NWS Glasgow, MT
Issued by NWS Glasgow, MT
597 FXUS65 KGGW 200830 AFDGGW Area Forecast Discussion National Weather Service Glasgow MT 230 AM MDT Fri Sep 20 2024 .DISCUSSION... KEY MESSAGES: - Breezy conditions expected today, with a Lake Wind Advisory in effect for the afternoon and overnight hours. - An upper ridge builds in next week with a return to above normal temperatures. WEATHER PATTERN OVERVIEW: A shortwave trough will slide along the Canadian border today, and drop a cold front south across the region this afternoon. Winds will increase with the cold air advection and a few showers are possible with the increasing instability. Winds will be strong enough for a Lake Wind Advisory and should persist through most of the night. Northwest flow aloft and a Canadian high over the region will bring cooler temperatures for the weekend. One more shortwave slides through the region on Monday with showers generally across central Montana. Behind this wave, the upper ridge rebounds with temperatures returning to above normal levels. FORECAST CONFIDENCE & DEVIATIONS: Once again blended NBM90 into the winds and also increased the NBM PoPs slightly for today. No other deviations from NBM were made with this forecast package. && .AVIATION... VFR. Clear skies and light winds will continue into the morning. An approaching cold front will kick up west to northwest winds this afternoon that will persist overnight. Some mid-level clouds will accompany the front along with scattered showers. && .GGW WATCHES/WARNINGS/ADVISORIES... Lake Wind Advisory from 1 PM this afternoon to 4 AM MDT Saturday for Central and Southeast Phillips-Central and Southern Valley- Garfield-McCone-Petroleum. && $$ weather.gov/glasgow