Advisory Archive

We are hostages under an oppressive regime of high pressure. There’s no new snow, winds are west at 10-20 mph and an inversion has created above freezing temperatures at the ridgetops and low 20s in the valleys. West Yellowstone and Cooke City have been spared the inversion, but will not escape the warm temperatures which will reach the low 40s everywhere. A slow change back to winter begins on Friday, so don’t despair.

Under clear skies this morning, temperatures are high 20s to low 30s F near ridgelines and 10-15 degrees colder in valleys. Wind is west-northwest at 15-25 mph in the northern ranges and Cooke City, and 5-15 mph elsewhere. Dry conditions will prevail today under mostly sunny skies. Temperatures will be 30s to low 40s F with west-northwest wind at 10-25 mph. There is a small chance for snow showers near Big Sky and Cooke City on Wednesday, and a better chance for snow for the entire advisory area Friday night through the weekend.

This morning, temperatures are high 20s to low 30s F in the mountains and 5-10 degrees colder in the valleys. Wind is west-northwest at 15-25 mph with gusts near Bozeman and Big Sky up to 35 mph. Today, temperatures will reach the high 30s to low 40s F, and wind will be west-northwest at 15-25 mph near Bozeman and 5-15 mph elsewhere. A strong ridge of high pressure continues to block precipitation this week. Late this week, a shift to cooler, unsettled weather will bring a chance for snow next weekend.

A stagnant weather pattern is creating strong temperature inversions. This morning, valley temperatures are 10-20 degrees colder than the mountains. A 5 a.m. mountain temps range from the mid-20’s to low 30’s F under clear skies. Winds are blowing 10-25 mph out of the W-NW with ridgetop gusts pushing 30 mph. Today, high pressure remains parked over the area producing sunny skies and relatively calm conditions. This calm and clear weather pattern will exist through the weekend.

Overnight the mountains around Cooke City picked up a trace to 1” of new snow, while rest of the advisory area remained dry. This morning temps range from the teens to upper 20’s F under mostly clear skies. Winds are blowing 15-30 mph out of the W-NW with the exception of the Bridger Range where they’re blowing out of W-SW. Today, temps will warm into the upper 20’s to low 30’s F under sunny skies. Winds will remain light to moderate out of the W-NW. The dominating ridge of high pressure parked over the area will produce a benign weather pattern through the foreseeable future.

Overnight the mountains around Cooke City picked up 2” of new snow while the mountains around West Yellowstone picked up a trace to 1”. At 5 a.m. temps range from the teens to low 20’s F and winds are blowing 10-25 mph out of the W-NW. Today, skies will be mostly clear and temps will warm into the mid to upper 20’s F. Winds will continue to blow 10-25 mph out of the W-NW. A strong ridge of high pressure builds over the area starting today producing clear skies and dry weather for the extended forecast.

At 5 a.m. under clear skies, there’s no new snow, just wind (15-25 W) and temperatures of 10-15F. Winds in the Bridger Range have lessened from yesterday’s speeds of 35 mph that swirled from all directions. Today will be clear with temperatures reaching the mid-20s. High clouds will slide in from the NW tonight, and temperatures will drop into the teens. A high pressure ridge will dominate through the weekend and block any chance of snow.

Snowfall continued in the northern mountains yesterday measuring 5” in the Bridger Range and 3” in Hyalite and around Big Sky. Westerly winds have increased and are blowing 40-50 mph in the Bridger Range and 15-30 mph everywhere else. At 5 a.m. mountain temperatures are in the low single digits (F) under mostly clear skies. High pressure builds today and skies will remain clear with temperatures reaching 20F and dropping into the single digits tonight. Wind speeds will lessen and remain light through the week.

Since yesterday morning new snow totals are 4-6” near West Yellowstone, 7” near Cooke City, 10” in the Bridger Range and Big Sky, and 12” in Hyalite. Temperatures this morning are single digits to teens F and will be low 20s F today. Wind is northwest-west at 10-15 mph with gusts of 25 mph. Near Cooke City wind is 30 mph with gusts of 50 mph. Today, northwest wind will continue at 10-20 mph with stronger speeds near Cooke. Lingering snow showers under mostly cloudy skies could bring another 1-2” of snow today.

Since yesterday morning the mountains got 3” of new snow near Cooke City with 1-2” in the southern Madison and Lionhead Ranges. At 4 a.m. temperatures are low 30s F and wind is south to southwest at 10-20 mph with gusts to 45 mph. Temperatures will fall to low 20s and teens F today. Wind will be southwest at 15-30 mph this morning, then shift to the north-northwest at 5-15 mph this afternoon. Snow showers will begin this morning with periods of heavy snowfall expected today and through tonight. By morning the mountains will get 8-15” of snow near Big Sky, Hyalite, and West Yellowstone with 15-20” possible in the Bridger Range and near Cooke City.