Advisory Archive

Yesterday, a fast moving cold front moved through southwest Montana producing strong winds, lightning, and precipitation in the form of both rain and snow. This fast moving weather disturbance deposited 3-4 inches of high density snow in the Bridger and northern Gallatin Ranges as well as the mountains around Cooke City. All other areas received 1-2 inches of snow. Winds spiked during the frontal passage, reaching over 60 mph, but have decreased significantly. Currently, winds are blowing out of the WNW at 15-25 mph and should continue along these lines for the remainder of the day. Temperatures are currently in the single digits to high teens and will climb into the 20’s and 30’s F by this afternoon. Today, mountain snow showers are likely with an additional 1-3 inches possible by this evening. Southwest Montana will see a slight break in the weather tonight into tomorrow.

Mountain temperatures are in the mid to upper 30s F this morning with winds blowing 15-30 mph from the SW. A trough of low pressure will approach Montana this morning and bring significant changes in the weather. Strong SW winds with gusts up to 50 mph should arrive at the front of this system. Snow should arrive in the mountains this afternoon with cold air behind it. Temperatures should rise to the high 30s and low 40s this morning before gradually cooling as the storm progresses. By tomorrow morning 3-5 inches of snow should fall in most areas although the mountains near Cooke City should get a bit more….as they have this entire season.

Warm weather continues with temperatures near 30 F at 9000 ft. Since yesterday the mountains near Cooke City received 5 inches of snow. The rest of the advisory area remained dry. Winds blew 30-50 mph overnight from the W and SW, and this morning they were blowing 20-35 mph. An upper level ridge will prevent any accumulating precipitation today. Temperatures will climb into the high 30s and low 40s F, and winds will blow 15-25 mph from the W and SW. A low pressure system will arrive tomorrow afternoon with snow followed by colder temperatures on Sunday.

The current weather pattern continues to deliver warm temperatures, rain, and snow. Since yesterday morning Bridger Bowl and Big Sky received an additional 2-3 inches of snow. In many places with temperatures near or above freezing, it’s difficult to tell how much precipitation fell as rain and how much fell as snow. Hyalite Canyon and the Taylor Fork area received 0.5 inches of water which should be 5 inches of snow above treeline. The mountains near Cooke City received 0.9 inches of water or 9 inches of snow above treeline. Freezing levels have been between 8000 and 9000 feet.

Yesterday westerly ridgetop winds blew 30-50 mph. They decreased to 20-40 mph this morning with temperatures hovering near 32 F. Winds will remain strong today and temperatures will rise into the upper 30s and low 40s F. More snow and rain will fall though the current storm is ending. Spring storms are somewhat unpredictable, but most areas should receive an additional 1-3 inches of snow today while Cooke City should get 4-5 inches.

A very moist system from the Pacific has begun dropping snow in the mountains. At 6 a.m. five to seven inches has fallen on a northwest flow. Winds started to increase out of the west yesterday afternoon and are averaging 20-25 mph with gusts of 35 mph. Mountain temperatures are in the high teens and will rise into the mid 20s as ridgetop winds shift to the northwest. This storm will continue into Thursday. By tomorrow morning I’m expecting 12+ inches of additional snow in the mountains.  

Before the storm ended yesterday morning it snowed three more inches in Hyalite and one to two inches everywhere else. Temperatures rose to the mid 20s before dropping to the teens last night. Winds increased from the west to southwest and are now blowing 10-20 mph. The sun will poke through partly cloudy skies this morning as mountain temperatures rise to near freezing. A moist, Pacific flow, pushed by the jet stream, will creep in late this afternoon and bring snow showers totaling a couple inches by 6 a.m. and more on Wednesday.  

Over the past 24 hours the Bridger Range picked up over a foot of snow. The mountains around Big Sky, West Yellowstone and Cooke City picked up 4-6 inches and the northern Gallatin Range received 1-2 inches. Currently, mountain temperatures are in the mid teens to low 20s F and ridgetop winds are blowing out of the W at 5-15 mph. Today, temperatures will warm into the 30’s F and winds will stay light out of the W at 5-15 mph. Skies will stay mostly cloudy through the morning hours, but will begin to clear by late afternoon. A weak ridge of high pressure will produce calm and clear conditions tonight, but another storm is scheduled to impact our area starting tomorrow afternoon.    

Since yesterday morning 2-3 inches of snow has accumulated in the mountains around Cooke City and West Yellowstone. The mountains around Bozeman and Big Sky picked up a trace to one inch. This morning temperatures are in the high teens to mid 20s F and will climb into the 30s by this afternoon. Winds are light out of the SSE at 5-15 mph with the exception of Hyalite where they are blowing 20-30 mph out of the SSW. Today, a southerly flow will deliver snow showers to the southern mountains where an additional 1-2 inches are possible; the northern ranges could pick up around an inch.  

Over the past 24 hours the mountains around Cooke City have received 5-6 inches of new snow; the mountains around Bozeman, Big Sky and West Yellowstone have picked up 1-2 inches of snow. Temperatures this morning are ranging from 10-20 degrees F and winds are blowing out of the WSW at 10-20 mph with gusts near Big Sky reaching close to 30 mph. Today, mountain temperatures will climb into the high 30s to low 40s F under mostly cloudy skies and winds will stay out of the WSW at 10-20 mph. Light snow showers are possible in the mountains throughout the day, with a better chance of snow tonight into tomorrow. 2-3 inches of snow is possible in the mountains by tomorrow morning.

Since yesterday Cooke City received about 1 inch of new snow while other areas remained dry. Temperatures this morning were in the high teens to low 20s F with S and SW winds averaging 10-15 mph. If skies remain cloudy, high temperatures will only climb into the upper 20s F. Winds shouldn’t change much and continue from the S and SW. This afternoon will see a slightly better chance for snowfall than yesterday but accumulations will only be a few inches with southern areas receiving more and areas near Bozeman possibly remaining dry.