Advisory Archive
Although it was sunny in the mountains, the Gallatin Valley was under a low ceiling of clouds yesterday. These clouds and fog will persist until this afternoon when sunny skies will prevail. Mountain temperatures are in the single digits this morning but will warm into the low twenties. Ridgetop winds have picked up slightly and are blowing west to southwest at 15-20 mph. Under clearing skies there's no snowfall in the forecast until Thursday.
Clear and calm conditions with strong temperature inversions have settled over southwest Montana. Over the next 24 hours cold air trapped in the valleys will produce dense valley fog along with a few snow flurries. Spring like temperatures will be felt in the upper elevations with highs near freezing and lows in the teens. Valley temperatures will feel much more like winter with highs in the twenties and lows in the single digits. Winds will be calm today but will increase slightly out of the W-NW tonight and tomorrow.
In the past 24 hours 2-3 inches of new snow fell in the Bridger Range while the rest of the advisory area picked up an additional trace to one inch. Winds have been relatively light out of the W-NW blowing at 5-10 mph. Today, a weak ridge of high pressure will bring mostly sunny skies and calm conditions to southwest Montana. Temperatures will remain average for this time of year with highs in the upper 20's and lows in the teens. The ridge will begin to break down this evening, bringing a slight chance of snow showers tonight into Monday.
In the past 24 hours a moist southwest flow has deposited 2-3 inches of new snow over much of our advisory area. Winds have been blowing out of the W-SW at 10-15 mph but will shift throughout the day to a more W-NW flow. Currently temperatures are in the mid teens, but will rise into the low 30's by this afternoon. Light snow will continue to fall throughout the day bringing an additional 1-2 inches of new snow to our region. Cold air will follow this band of moisture, dropping temperatures into the low teens by tomorrow morning.
Yesterday, most areas received a meager 1 inch of snow. This morning with temperatures in the mid teens F, winds increased near Big Sky and were blowing 10-20 mph from the southwest while blowing 5-10 mph everywhere else. Today's weather shouldn't be too exciting even though satellite images show an approaching area of low pressure. A weak upper level ridge over southwest Montana will limit any precipitation today. By tomorrow another inch or two of snow will accumulate mostly in the southern half of the advisory area. Today temperatures will reach the mid 20's F with light southwest winds blowing 10-15 mph.
Since yesterday morning 2-3 inches of snow has fallen from Big Sky south to West Yellowstone and Cooke City while the northern mountains near Bozeman received only a trace. Winds have been relatively light blowing 5-15 mph from the west and southwest with temperatures in the mid to high teens F. Today's weather shouldn't change much. High temperatures will be near 20 degrees F with mostly calm winds and only a few more inches of snow falling south of Bozeman.
Yesterday, light, steady snowfall dropped 1-2 inches from the Yellowstone Club to West Yellowstone to Cooke City. Winds were out of the southwest blowing 15 mph and calmed even further last night. Under clear skies, mountain temperatures this morning are in the low teens but will rise into the 20s. A moist southwest flow will increase clouds and bring snowfall to the southern mountains tonight with another 1-2 inches of snow by morning.
Only remnant flurries fell after yesterday's early morning storm. Temperatures reached the 20s and ridgetop winds blew 15-20 mph from the west-southwest. Today will be mostly cloudy with mountain temperatures again reaching the mid 20s before dropping to the low teens tonight. Ridgetop winds will continue to be west-southwest at 15-20 mph. A few bands of moisture may drop a dusting of snow, but it won't be enough to really care about.
A cold winter storm system has impacted southwest Montana depositing 8-10 inches of new snow in the Bridger Range with 5-7 inches falling throughout the rest of the advisory area. Winds have picked up overnight and have been constant along the ridgetops at 20-30 mph out of the W-NW. Snow and winds will decrease throughout the day and temperatures will be on the cooler side with highs in the twenties and lows in the single digits.
A ridge of high pressure has dominated our weather pattern over the past 24 hours bringing us sunny skies and calm conditions. This ridge will break down today as a weak low pressure system pushes in from southern Idaho.
Winds are currently calm out of the W-SW at 5-15 mph, but will increase as the day progresses to 15-25 mph along the ridgetops. Temperatures will remain mild today with highs in the upper 20's to low 30's F, but will cool off this evening with lows in the teens. The impact of this system will be felt more in the southern mountains which could pick up 6-8 inches of snow by tomorrow morning with the northern ranges picking up less than half that amount.