Advisory Archive

There are 3-4” of dense new snow in the mountains near Bozeman and 5-7” near Big Sky, West Yellowstone and Cooke City. Winds are 20-30 mph out of the west-northwest with gusts of 45-60 mph this morning. Yesterday afternoon gusts over 100 mph were recorded at Lionhead and on the summit of Lone Mountain. Temperatures are single digits and teens F. High temperatures will be in the teens and 20s F under partly sunny skies. Strong west winds will continue today, but gusts will not be as extreme as yesterday. An inch or two of snow are possible tonight in Cooke City. Other areas will only get a few flurries.

At 6 a.m., there are 7” of new snow in the Lionhead area and 2-3” across most of the rest of the advisory area (excepting the Bridger Range which stayed dry). Winds are 20-40 mph out of the south and southwest with gusts of 35-55 mph. Temperatures are in the teens F. South-southwest winds will ramp up even more during the day and we could see gusts into the 60s and 70s mph. High temperatures will generally be in the high 20s F (mid-30s F in the Bridgers). 5-10” of new snow will accumulate near West Yellowstone and Cooke City by tomorrow morning, with the bulk falling during daylight hours today. 3-5” will fall near Big Sky and 2-4” near Bozeman.

At 5 a.m. there is 1” of new snow in Cooke City and 2-3” in Big Sky to West Yellowstone. Wind is 5-15 mph from the S-SW, with the exception being the Bridger Range where an east wind is blowing 20-30 mph. Temperatures are 0-5F. Today will be partly cloudy and light wind with temperatures reaching the high teens. Snowfall late tonight will drop an inch up north and 3” in the southern ranges.

There’s no new snow to report this morning. Southwest wind is blowing 5-15 mph with gusts of 20 mph, except up Hyalite where it is averaging 25 mph and gusting to 35 mph. Temperatures are in the low single digits F and will rise to 20F under mostly sunny skies this morning. Snowfall will start by later afternoon and drop 1-2” by tomorrow morning with winds of 10-20 mph from the west.

The mountains received another 1-4” of fluffy snow yesterday, with the Bridger Range and mountains around West Yellowstone getting the most. This morning temperatures are in the single digits F with 5-15 mph winds from the south to the west. Today, temperatures will reach the teens to 20s F with 5-15 mph winds from the south to the southwest. A trace of snow is possible. 

This morning, temperatures are in the single digits F with 5-20 mph winds from the east to south, except in Cooke City where they are from the northeast. The Bridger Range received 11” of fresh snow with 2-4” everywhere else. Today, temperatures will be in the teens to 20s F, the wind will shift back to the southwest to west later this morning at 5-15 mph and the mountains will receive 3-6” of snow.

Since yesterday morning, the mountains near West Yellowstone received 7-9” of new snow, near Big Sky and Cooke City received 2-3”, and 1” fell near Bozeman. This morning, temperatures are single digits to teens F, and wind is south-southeast at 5-10 mph with gusts of 15-20 mph. In the Bridger Range, east wind is 25 mph with gusts to 45 mph. Today, temperatures will reach high teens to low 20s F, south-southeast wind will shift to southwest at 10-25 mph, and snow showers could deliver 3-5” by this evening.

Since yesterday morning the mountains near Bozeman and Big Sky received 3-6” of low density snow, and near Cooke City and West Yellowstone received 1-2”. This morning, temperatures range from zero to low teens F, and wind is out of the southwest at 10-15 mph with gusts of 20-30 mph. Today temperatures will reach low 20s F with south-southwest wind at 10-30 mph. Snow showers could deliver 1-3” by this afternoon near Cooke City and West Yellowstone, and by morning an additional 2-3” is possible throughout the forecast area. More snow is expected tomorrow.

At 5 a.m. there is 1” of new snow in Hyalite, 3-4” in Big Sky to Lionhead, and 1” in Cooke City. Wind is from the W-SW averaging 15-20 mph with gusts of 38 mph (58 in the Bridger Range). Mountain temperatures are in the low teens under cloudy skies and scattered snow showers. Wind will continue today, temperatures will reach the high teens and snowfall will drop 1-2” during the day.

COOKE CITY

UPDATE: We are raising the avalanche danger in Cooke City to CONSIDERABLE.

 In the last 12-24 hours there was a skier-triggered avalanche and a natural avalanche at Daisy Pass (observation and photo). The natural slide was found by the groomer on the road near the pass. With only an inch of new snow and moderate winds the snowpack was not expected to avalanche. I was wrong. Our uncertainty on what exactly is going on is high. Cooke City had many large avalanches break into Tuesday. We are unsure what layer these slides are breaking on. My advice is to stay off of avalanche terrain. Natural and human-triggered slides are likely.

Yesterday, 1-2” fell with 3” at Big Sky. Wind is W-NW at 30-50 mph in the Bridger Range and 10-20 mph with gusts of 38 mph everywhere else. Temperatures are in the high single digits this morning and will reach into the 20s F today as wind blows strong from the W at 20-40 mph in the north and 10-20 mph in the south. Expect mostly cloudy skies today and snowfall tonight bringing 1-2” by morning.