Advisory Archive

Over the past 24 hours, a moist SW flow has deposited 4-6 inches of snow in the mountains around Cooke City and West Yellowstone. The mountains around Big Sky including the northern Gallatin Range have picked up 2-3 inches while the Bridger Range has remained dry. Most areas are still receiving strong winds which are blowing 15-40 mph from the SSW, with the exception of the Bridger Range where winds have calmed to 5-10 mph.  Temperatures are in the teens and will warm into the mid 20’s by this afternoon. Skies will stay cloudy today and winds will continue to blow out of the SW at 15-30 mph as another storm system approaches our area. The southern mountains will likely see accumulations of 4-6 inches by tomorrow morning while the northern mountains will pick up 2-4 inches.

Since yesterday morning the mountains near Cooke City and West Yellowstone received an additional 1-2 inches of snow. Most areas received strong winds which were blowing 15-45 mph from the SSW this morning except in the Bridger Range where winds calmed overnight and were blowing 10-15 mph. Temperatures were in the low teens and high single digits F this morning. A moist SW flow will bring more snow by tomorrow morning with the southern parts of the advisory area receiving 2-3 inches and a trace to 1 inch further north. Today temperatures will be in the upper teens and low 20s F. Winds should decrease slightly and blow 10-30 mph.

Overnight 7-10 inches of snow fell throughout the advisory area with right side up snow (warm and dense snow with cold light snow on top). The storm started warm with temperatures near 30 degrees F dropping to the low teens and single digits F this morning. Ridgetop winds throughout the storm and into this morning were blowing 20-40 mph from the SW. Cold air advection will prevent temperatures from rising today. Winds should decrease somewhat and blow 20-25 mph from the SW. Although the heaviest snow has ended, more will come today and tonight producing another 4-6 inches. An unsettled weather pattern for the next few days will not bring any major storms but generally cool and snowy weather.

West winds picked up again yesterday and averaged 30-40 mph with gusts hitting 60-80 mph as temperatures reached the high thirties before falling to the low twenties last night. Currently west-southwest winds are blowing 20-40, except around Cooke City where they are 30-60 mph. Today, expect increasing clouds from a moist, southwest flow and snowfall later this afternoon lasting into tomorrow.  Cooke City is poised to get the brunt of the storm.  By morning the southern mountains could have 8-10 inches of new snow with half that amount falling in the northern areas.  

Yesterday was gorgeous with sunny skies, mountain temperatures in the mid thirties and westerly winds at 20-30 mph. Today will start out sunny, but clouds will roll in late this afternoon. Mountain temperatures will reach 40F in the mountains from the high 20s this morning. Winds increased overnight and are currently blowing west to southwest at 30 mph with gusts reaching 50 mph. Wind, warmth and sun will hopefully give way to cold, clouds and snow sometime tomorrow. The mountains could use a facelift. 

Southwest Montana will receive a welcomed reprieve from the wind today as a ridge of high pressure builds over the region. Currently, winds are blowing out of the WSW at 15-30 mph and will continue at these speeds for the remainder of the day. Mountain temperatures are presently in the mid to high 20s and will rise into the 40s under mostly sunny skies. Another round of wind is expected to arrive tomorrow.

Freight train winds have been the main weather event over the past 24 hours. Currently, winds are cranking out of the WSW at 30-40 mph with gusts reaching over 50 mph in most mountain locations. Temperatures are in the mid 20s to low 30s F and will rise into the 40s by this afternoon. Skies will be partly cloudy today and winds will gradually decrease by this evening.   

Yesterday light snowfall near Cooke City produced about 1 inch of new snow while all other areas were dry. Temperatures this morning were in the low 20s F near Bozeman and Big Sky where winds were ripping at 25-60 mph from the W. Further south temperatures were in the low teens F and winds were blowing 10-25 mph. Partly sunny skies will allow high temperatures to climb into the low 30s, but the main event will be winds which show no signs of slowing today.

Yesterday most places received an inch or two of new snow. This morning temperatures were in the mid teens F and winds continue to blow strongly from the W at 20-40 mph. Today should have fewer clouds than yesterday and a little more sunshine. Temperatures should reach the mid 20s F and winds will continue from the W blowing 15-30 mph.

With no temperature inversion this morning, it was colder in the mountains than in the valleys. Mountain temperatures were in the single digits F except near Cooke City and West Yellowstone where they were a few degrees below 0 F. Winds were blowing 15-30 mph from the W except in the Bridger Range where ridgetop winds were blowing 30-40 mph. Today a trace to 1 inch of snow should fall near Cooke City while all other areas will remain dry. High temperatures will be in the high teens to low 20s F and winds will continue unchanged.