Advisory Archive

Yesterday morning an inch of wet snow fell over our forecast area with the mountains around Cooke City getting four inches. Mountain temperatures are hovering near freezing as winds pick up out of the southwest at 20-40 mph ahead of an approaching storm. Temperatures will drop to the upper teens tonight. Snowfall this afternoon and this evening will lay 4-6 inches in the southern mountains and 2-4 inches up north.  

Much of our advisory area remained dry over the past 24 hours with the exception of Cooke City which picked up an additional 3-4 inches on snow since yesterday morning (Fisher Creek Snotel). Warm air has moved into southwest Montana in the wake of the yesterday’s storm producing night time lows that barley dipped below freezing. Currently, mountain temperatures are in the high 20°'s to low 30°’s F and winds are out of the W-SW at 15-25 mph. Cloudy and warm conditions will continue through the day with a slight chance of mountain snow showers. High temperatures will climb close to 40 F and winds will stay out of the W at 15-20 mph. An increasing chance of precipitation will arrive tomorrow.

A fast moving storm dropped 2-4 inches of snow over our advisory area last night, with the exception of Cooke City which picked up 5 inches (Fisher Creek Snotel). Ridgetop winds have been blowing 15-30 mph out of the W-NW, but decrease significantly with a drop in elevation. Mountain temperatures are ranging from the mid-teens to low twenties F and will rise into the 30’s by this afternoon. Precipitation will continue through this morning with additional accumulations of 1-2 inches possible. Ridgetop winds will stay steady through the morning hours, but both winds and precipitation will decrease by this afternoon. Mostly cloudy skies and warmer temperatures will persist through tomorrow. 

In the past 24 hours 3-4 inches of high density snow has fallen in the mountains around Cooke City and in the Bridger Range totaling a half inch of water (SWE). The rest of our advisory area picked up 2-3 inches. Currently, winds are blowing 15-20 mph out of the W-NW with gusts reaching the upper 30’s mph and mountain temperatures are between 10-15 degrees F. Today, temperatures will rise into the 20’s F under mostly clear skies, but increasing clouds and wind move into southwest Montana by this evening. Another storm system is scheduled to impact our area starting tonight and last through mid-day tomorrow. Accumulations of 2-4 inches can be expected in the mountains by tomorrow afternoon.  

This morning temperatures were near 20 degrees F, and winds were ripping 20-40 mph from the SW except on Flanders Mountain in Hyalite where they were blowing 40-60 mph. Yesterday the mountains near Cooke City and West Yellowstone received 1-2 inches of snow and all other areas remained dry or received a trace snow. A strong pulse of snowfall will come this morning followed by decreasing temperatures although the coldest air will descend into eastern Montana. Strong winds will continue blowing 20-40 mph from the W, and temperatures will drop into the low teens F by late this afternoon. By tomorrow morning 4-6 inches of snow will accumulate in most areas. 

Calm weather ended yesterday with winds in Hyalite Canyon blowing 40-60 mph. This morning winds throughout the advisory area were blowing 20-40 mph from the W with temperatures in the low 20s F. The mountains near West Yellowstone received 6 inches of snow, the southern half of the advisory area received 2-3 inches and the northern half received only a trace. Under cloudy skies today winds will remain strong and temperatures will only climb a few degrees. With moisture streaming through Idaho into Wyoming, mountains near West Yellowstone will receive 2-3 inches of snow by tomorrow morning, and the rest of the area will get 1-2 inches.

After a sunny day with temperatures in the high 20s, clouds rolled in and winds started to pick up last night. Ridgetop winds are southwest at 15-25 mph and will gust into the mid 30s later this afternoon. Today will be cloudy and windy with temperatures in the mid 20s.  Most importantly, a moist westerly flow will bring snow showers and drop 1-2 inches in the north and 2-4 inches in the southern ranges. 

Late yesterday, a brief snow shower dropped 1-2 inches from West Yellowstone to Big Sky with Cooke City getting a trace to 1 inch. In the past 24 hours mountain temperatures remained in the high teens to low 20s with light westerly winds at 5-10 mph. Today will be mostly sunny and calm with temperatures reaching the mid 20s. This high pressure system will begin to break down tonight with increasing clouds and moderate southwest winds, although no precipitation is expected until tomorrow. 

High pressure is dominating our weather pattern and has created strong temperature inversions. At 4 am this morning mountain temperatures are in the mid to high twenties F with the exception of Cooke City which is in the mid teens F. Winds are light are out to the W-SW at 5-15 mph. Today, mountain temperatures will reach into the low thirties F and skies will become mostly cloudy by this afternoon. West Yellowstone could see some light precipitation by this evening while the northern ranges will remain dry. No real accumulations are expected over the next 24 hours.

A ridge of high pressure is currently sitting over southwest Montana producing clear skies and calm conditions. No new snow has fallen over our advisory area in the past 24 hours. Presently mountain temperatures are in the high teens to low twenties F and winds are light out of the W at 5-10 mph. Today clear skies and lots of sun will allow mountain temperatures to climbing into the 30’s and winds will stay calm out of the W. Stable weather will persist over our area for the next 24 hours.