Advisory Archive
A weak upper level trough continues to pump cold air and light bands of moisture into southwest Montana. During the past 24 hours a trace to one inch of new snow has fallen over much of our advisory area with light winds out of the N-NE at 5-10 mph. Today, this upper level low will move to the east giving way to clear skies and cold conditions. Temperatures will struggle into the teens for highs and lows will be in the single digits above or below zero. Calm and clear conditions will persist throughout the day and into tomorrow.
A cold arctic air mass parked over Montana has brought 1-2 inches of new snow to our advisory area over the past 24 hours. Today will deliver much of the same with mountain snow showers depositing an additional 1-2 inches by this evening. Winds will be light out of the north at 5-10 mph and temperatures will remain cold with highs in the upper teens and lows in the single digits F.
Yesterday 1 inch of snow fell in the Bridger, northern Madison, and northern Gallatin Ranges while other areas remained dry. Today will be similar to yesterday with 1-2 inches of snow expected mostly in the northern half of the advisory area. The southern half should get at least a dusting of snow. This morning temperatures were in the single digits F with northerly winds blowing 5-10 mph. Highs today will reach the mid to high teens F as cold air continues descend from the north, and winds will stay light blowing 5-10 mph.
Since yesterday morning 1-2 inches of snow fell throughout most of the advisory area. With cold air descending from the north, temperatures this morning were in the low teens to high single digits F. Winds decreased last night and were blowing 5-10 mph from the north this morning. Today will be cloudy and colder than recent days. High temperatures will reach the upper teens F and light northerly winds will blow 5-10 mph. Snowfall is likely today but only 1-2 inches will accumulate.
In the last 24 hours the northern mountains picked up 1-2 inches of snow with the southern regions getting only a trace to one inch. The Bridger Range got windy yesterday afternoon with steady ridge speeds of 35-40 mph. Currently they're at 25-30 mph while the rest of the forecast area is only getting light 10-15 mph breezes. Mountain temperatures are in the high teens to low 20s where they'll remain today. Under mostly cloudy skies, small weather disturbances will drop another 1-3 inches by tomorrow morning.
Most mountain ranges got one to two inches of new snow yesterday with Shower Falls in Hyalite seeing three inches. Winds have been light at 10 mph out of the west to southwest with temperatures dropping from the high twenties yesterday afternoon to the teens this morning. Today will be mostly cloudy with light winds and mountain temperatures reaching the mid to high twenties. Scattered showers will bring a trace to one inch of new snow by morning.
Over the past 24 hours a ridge of high pressure brought sunny skies and calm conditions to southwest Montana, but the existing ridge has started to break down giving way to the next weather system moving in from the west. Currently it is snowing lightly and a trace to one inch has fallen in the northern ranges with no accumulations being recorded in the south. Ridgline winds have increased this morning to 10-15 mph out of the W-NW and will continue at this level throughout the day. Temperatures will remain mild with highs in the 30's and lows in the teens. We can expect to see 1-2 inches of new snow in the mountains by the end of the day.
In the past 24 hours 4-6 inches of new snow has fallen in the Northern Madison and Gallatin Ranges as well as the Bridger Range while 1-2 inches fell in the southern ranges. Winds have calmed significantly blowing at 5-15 mph out of the W-NW. This moist weather system will be pushed to the east by a building ridge of high pressure which will bring our area calm conditions and partly cloudy skies through the remainder of the day. Colder air will be associated with this ridge dropping temperatures into the twenties for highs and teens for lows. Another weak weather disturbance will move into southwest Montana early Monday morning brining cloudy skies and a chance of precipitation.
Since yesterday 20 inches of dense snow fell in the Bridger Range, 6-8 inches in the Gallatin and Madison Ranges and the mountains near Cooke City, and 3-5 inches near West Yellowstone. This morning it's still snowing with temperatures in the high teens to low 20s F and winds blowing hard at 15-30 mph generally from the west. Today will warm into the high 20s F with arctic air to the east moving this direction and limiting further warming. Winds should remain strong this morning and blow 10-20 mph from the west and northwest. By tomorrow morning an additional 1-3 inches of snow will accumulate mostly in the northern half of the advisory area.
Since yesterday 1-3 inches of snow fell in southwest Montana. This morning temperatures were in the mid to high teens F with winds blowing 10-20 mph mostly from the west. Once again winds increased yesterday afternoon and evening blowing as hard as 30 mph. Snowfall started this morning with about 1 inch of new snow. It will end this afternoon before resuming later tonight. By tomorrow morning another 2-4 inches will accumulate. Today high temperatures will reach the mid 20s F and winds will blow 15-25 mph from the west.
