Advisory Archive

Over the past 48 hours intermittent weather disturbances have moved through southwest Montana producing heavy snow in some areas. The Shower Falls SNOTEL site in the northern Gallatin Range has recorded 1 inch of SWE totaling close to a foot of snow since Monday afternoon. The Bridger Range and mountains around Big Sky have picked up 4-6 inches over the past two days while the southern ranges received 1-2 inches. Currently, skies are clear and mountain temperatures are in the single digits above or below zero F. Winds are blowing 15-30 mph out of the WNW. Today a ridge of high pressure will build over the region producing clear skies and warmer temperatures. Highs today will climb into the mid 20s to low 30s F and winds will stay light to moderate out of the WNW. Conditions will begin to change tonight as another cold front approaches from the west.

 Over the past 48 hours intermittent weather disturbances have moved through southwest Montana producing heavy snow in some areas.  The Shower Falls SNOTEL site in the northern Gallatin Range has recorded 1 inch of SWE totaling close to a foot of snow since Monday afternoon.  The Bridger Range and mountains around Big Sky have picked up 4-6 inches over the past two days while the southern ranges received 1-2 inches.  Currently, skies are clear and mountain temperatures are in the single digits above or below zero F.  Winds are blowing 15-30 mph out of the WNW.  Today a ridge of high pressure will build over the region producing clear skies and warmer temperatures.  Highs today will climb into the mid 20s to low 30s F and winds will stay light to moderate out of the WNW.  Conditions will begin to change tonight as another cold front approaches from the west. 

Over the past 48 hours intermittent weather disturbances have moved through southwest Montana producing heavy snow in some areas.  The Shower Falls SNOTEL site in the northern Gallatin Range has recorded 1 inch of SWE totaling close to a foot of snow since Monday afternoon.  The Bridger Range and mountains around Big Sky have picked up 4-6 inches over the past two days while the southern ranges received 1-2 inches.  Currently, skies are clear and mountain temperatures are in the single digits above or below zero F.  Winds are blowing 15-30 mph out of the WNW.  Today a ridge of high pressure will build over the region producing clear skies and warmer temperatures.  Highs today will climb into the mid 20s to low 30s F and winds will stay light to moderate out of the WNW.  Conditions will begin to change tonight as another cold front approaches from the west. 

A cold front pushed through yesterday morning dropping 6-7 inches of snow by noon.  Last night another pulse dropped two more inches, except Cooke City which got closer to 4 inches.  These snowfall amounts were measured at SNOTEL sites and ski area weather stations.  Even more snow fell at higher elevations with 12” measured yesterday afternoon near Big Sky.  Winds have been blowing steady and strong out of the west to northwest. They are averaging 20-30 mph with gusts exceeding 40 mph.  Strong winds and scattered snow showers will continue into the middle of the week as mountain temperatures stay in the low 20s.  Winter is here.  

After last weekend's snow and a week of dry weather, more snow is coming today. 3-4 inches has already fallen in the mountains near West Yellowstone and Cooke City, and snowfall today should favor these areas. Yesterday ahead of this storm, winds increased and were blowing 20-50 mph from the S and SW. They have calmed slightly but should remain fairly strong through the weekend and slowly shift to the W and NW. Temperatures this morning are in the mid 20s F but should drop as the day progresses.

By Sunday morning the mountains throughout southwest Montana picked up 8-10 inches of new snow. The storm was cold and the snow that fell was low density powder measuring 5-6% with ridgetop winds out of the southwest at 10-20 mph.  The next seven days are forecasted to be dry.  Mountain temperatures are in the single digits this morning (well below average), but by Wednesday they are expected to rise into the high twenties.  

A few places received a trace of snow; otherwise, it seemed like spring was finally overtaking winter yesterday. This morning temperatures dropped into the mid to high teens F, and winds increased to 15-20 mph from the W with gusts up to 30 mph. At the Bridger Ridge winds were blowing 25-40 mph. Skies are cloudy this morning and may produce a dusting of snow, but drier air and ridge of high pressure will move over the area today possibly bringing more sunshine and fewer clouds than yesterday. Temperatures should rise into the mid 30s F or higher depending on cloud cover. Winds will blow 10-25 mph from the W with higher gusts at ridgetops.

Yesterday most places received an additional 3-5 inches of snow. Strong easterly winds in the Bridger Range calmed overnight to 10-15 mph and shifted to the SSW this morning.  All other areas received very little wind yesterday. Today wind directions will swing around the compass and only blow about 10 mph. Temperatures were in the teens to low 20s F this morning and should climb to near 30 F today with mostly cloudy skies. More moisture and some instabilities in the atmosphere will bring another 2-3 inches of snow to Cooke City while other areas will get an inch at most.