Advisory Archive

At 5 a.m. the mountains have 2-3” of new snow with 10-12” near Cooke City since yesterday morning. Temperatures are high 20s F, and wind is southwest at 10-20 mph with gusts of 30-40 mph. Temperatures today will be high 20s to 30s F with southwest wind at 15-20 mph. This afternoon, a cold front accompanied by stronger wind will bring heavy snowfall through morning. The mountains will get 6-8” of new snow by tomorrow morning, and intermittent heavy snow will continue through Monday.

A cold, wet weather system is currently impacting the northern ranges of the forecast area including Cooke City. Over the past twelve hours, the Bridger Range, northern Gallatin Range and mountains around Cooke City have picked up over a foot of new snow totaling more than 1” of SWE. The snowline is well defined and the mountains south of Bozeman have remained mostly dry with the exception of Big Sky which has picked up 1-2”. At 2 p.m. it’s still snowing in the mountains around Bozeman and Cooke City where another 4-6” will likely accumulate by this evening. Currently, temps are in the mid-20s to low 30s F and winds are blowing 20-40 mph out of the W-SW. Snow gradually tapers off this evening and Thursday looks to be mostly dry. This break will be short lived however as another system arrives Thursday night and Friday.

Since Saturday morning, the mountains got 8” of new snow near Cooke City, 4” in the southern Madison Range and Lionhead area, 1” in Big Sky and Hyalite, and zero in the Bridgers. Temperatures this morning are in the 20s F, and wind is westerly at 15-25 mph with gusts to 35 mph. Wind yesterday was 25-35 mph with gusts up to 77 mph at the Hyalite weather station.

Temperatures today will be 30s to low 40s F. Expect warmer, breezy, dry weather through Wednesday. The next chance for snow is Wednesday night, when the passage of a cold front could leave 1-3” of snow in the mountains and bring high temperatures on Thursday in the 30s F. After Thursday, a strong ridge of high pressure over the region will create dry weather with temperatures up to 50 F through the weekend.

At 4:30 this morning temperatures are teens to low 20s F. There is 5” of new snow near Bozeman and Big Sky with 2” near West Yellowstone and Cooke City. Wind is out of the west at 15-20 mph with gusts of 30-40 mph.

Today will be partly cloudy. Temperatures through the weekend will be in the 30s F. Wind will be west to southwest at 15-25 mph today, and will increase to 30-40 mph Sunday morning. Snow through the day on Sunday will drop 3-6” near Bozeman, Big Sky and West Yellowstone, and 7-12” near Cooke City.

At 5 a.m., 24-hour snowfall measured 1-2” in the Bridger Range, 3-6” from Bozeman to West Yellowstone and 9” outside Cooke City. At the ridgetop, winds are blowing north to west at 10-20 mph, and temperatures are in the mid 20s. The storm will exit this morning and may drop another inch of snow. High pressure moves in today with Monday and Tuesday forecasted to be unseasonably warm with temperatures touching 60F the valleys.

Cool, wet weather continues to impact southwest Montana. Overnight, the mountains around Bozeman received 3-5” of new snow totaling .3-.4” of SWE. The mountains around Big Sky and West Yellowstone picked up 1-3” of new snow totaling .1-.2” of SWE while the mountains around Cooked City got missed. At 9 a.m. mountain temps range from the upper teens to mid-20s F and winds are blowing 15-25 mph out of the W-SW. This morning, snow showers will linger in the mountains, but no real accumulation is expected. By this afternoon, skies will become partly cloudy and temps will warm into the 30s F. Winds will continue to blow 10-25 mph out of the W-SW. Another weak storm system is scheduled to impact the region Friday into Saturday. The mountains could see another 2-4” of new snow by Saturday morning.

Last night the Bridger Range picked up 6” of new snow. Other ranges got 1-2”, with the exception being West Yellowstone, which got missed. This morning mountain temperatures are in the teens and ridgetop winds are out of the west at 15-20 mph. Snowfall is tapering off and the next shot of moisture is Wednesday night which will be followed by sunny skies and seasonal temperatures.

Last night the Bridger Range picked up 6” of new snow. Other ranges got 1-2”, with the exception being West Yellowstone, which got missed. This morning mountain temperatures are in the teens and ridgetop winds are out of the west at 15-20 mph. Snowfall is tapering off and the next shot of moisture is Wednesday night which will be followed by sunny skies and seasonal temperatures.

After the snowstorms that ended 10 days ago I was wondering if we’d revert to an Indian summer or continue in a wintery pattern. Snowfall the last two nights points to winter, at least for now.

In the last 48 hours SNOTEL and ski area weather stations are showing 3-4” in the northern mountains, 6-7” around Big Sky, 3-6” outside West Yellowstone and 1-2” near Cooke City. Mountain temperatures are in the mid to high 20s and ridgetop winds are blowing N-NW at 10-20 mph. Tonight we’ll get another 4-6” with winds blowing 15-25 mph out of the N-NW.

It is the last day of summer and mountain SNOTEL stations show up to 10 inches of snow on the ground. The mountains received 3-4” water equivalent precipitation over the past week, which totaled 2-3 feet of dense snow at high elevations. Temperatures have been high 20s to 30s F, with winds south to westerly at 10-20 mph with gusts to 40-50 mph.

Fall will begin with well below average temperatures in the 20s F, and snow above 4000 feet. Valley rain this afternoon will become snow at all elevations early Friday morning. By Friday evening the mountains could have 10-15” of new snow with 2 feet in the highest ranges. Warmer, drier weather returns Sunday through next week.