711 FXUS65 KGGW 241505 AFDGGW Area Forecast Discussion National Weather Service Glasgow MT 905 AM MDT Sat Jun 24 2017 .SHORT TERM...for northeast Montana...today through Mon... Update... The inherited forecast remains in excellent shape with little in the way of changes needed at this time. Maliawco Previous Discussion... The upper flow pattern over Northeast Montana remains northwesterly today, and will continue so through Sunday and at least through mid-day Monday. This morning begins with a ridge axis lined up over the West Coast states, and a long-wave trough across the eastern two thirds of CONUS. The boundary between the cooler air of the trough and the warmer air of the ridge will be located over the local region. This boundary will be the focus of the cloud cover, and possibly isolated showers, over the northeast half of the CWA. But the ridge will shift east during the day to nudge the thickest cloud cover east. Today, the northwest flow, will limited maximum temperatures again. The gusty winds will move east of Fort Peck Lake today, closer to the North Dakota border, so will forgo any wind advisory. Sunday the ridge axis continues its movement east, bringing with it some very warm air. Increasing heights will bring about a return to near normal highs. Then Monday the ridge axis lines up over the Northern Rockies. Highs will rise around 10F degrees above normal, for a very warm day. Winds in the east pick up again, but this time from the southeast. A warm front may kick off some precipitation in late afternoon as upper flow turns more westerly. Templer .LONG TERM...Mon night through Sat... Upper ridge over the region early in the week begins to break down Monday night as an upper low pushes across the Canadian Rockies. Low pushes a cold front through Montana on Tuesday, with strong thermal ridge moving from eastern Montana into North Dakota. Possibly enough moisture with the system to produce a few showers with the frontal passage Tuesday afternoon and evening. Upper low then lingers over central Canada for the remainder of the week. This will result in generally cooler weather (near or below normal) with occasional showers possible. Ebert && .AVIATION... VFR conditions with light winds are expected through the TAF period. && .GLASGOW WATCHES/WARNINGS/ADVISORIES...NONE. && $$ weather.gov/glasgow |