Advisory Archive
Since our last forecast on Monday morning no new snow has fallen in southwest Montana. Mountain temperatures were near or below zero early in the week, but have warmed substantially. This morning they read in the low 20s around Bozeman, in the teens near Big Sky and the single digits in West Yellowstone and Cooke City. Winds have been westerly at 15-30 mph. A small disturbance will drop in from Canada tonight. The winds will shift to the northwest as temperatures drop into the single digits with a trace to one inch of snow falling. It’s not very exciting and I’m unhappy to report that dry weather is forecasted through the weekend.
A ridge of high pressure sitting over the Pacific Northwest is producing a northerly flow over the region. As a result, cold-clear conditions exist over southwest Montana. Currently mountain temperatures are ranging from 5-15 below zero and winds are light out of NNW at 5-15 mph. Today, temperatures will hike into the low teens and winds will continue to blow out of the NNW at 5-15 mph. Dry and warmer conditions will remain over southwest Montana through Tuesday.
Wednesday’s storm favored the northern Gallatin and Madison ranges. By yesterday morning, 9 inches of snow fell at Big Sky and Hyalite Canyon, 5-8 inches fell near Cooke City, and 2-3 inches fell in all other areas. Since then no more has snow fallen. Winds blew strong from the NW yesterday afternoon at 15-30 mph and shifted to the SW this morning. Winds were calmer near Cooke City and West Yellowstone this morning blowing 5-15 mph. Mountain temperatures at 4 a.m. were in the mid to high teens F although valley temperatures near West Yellowstone were -10 degrees F.
Today a cold front will move over the area bringing light snow and colder temperatures. Winds will blow 20-30 from the W ahead of this front then calm and shift to the N as this front passes. Temperatures should drop into the single digits F by this afternoon. By this evening 1-3 inches of snow should accumulate.
Over the last few days mountain temperatures have been warmer than average and reached into mid to high 30s as westerly winds blew 10-25 mph. Always ahead of the curve, Cooke City got two inches of snow last night. This afternoon will be stormy and remind us that winter has not forsaken us. Arriving from the northwest, a cold front will produce snow in the mountains. By late tonight I’m expecting six to eight inches of new snow with temperatures dropping into the single digits to low teens. Winds will increase from the northwest today with gusts reaching 40-50 mph tonight. Tomorrow looks to be cold and partly cloudy.
A developing cold front has replaced yesterday’s warm-sunny weather with cloudy skies and slightly cooler temperatures. Currently mountain temperatures are ranging from the mid 20s to low 30s and winds are out of the WSW at 15-30 mph. As the cold front moves through the region this morning, we can expect a chance of mountain snow and valley rain with accumulations of one inch possible in the higher elevations. A ridge of high pressure will build behind the cold front producing partly cloudy skies and drier conditions by this afternoon. Highs today will be in the mid 20s to low 30s in the mountains and winds will stay out of the WSW at 15-30 mph.
A strong cold front pushed through southwest Montana yesterday afternoon producing strong winds and isolated snow showers. Most areas picked up 2-4 inches with the exception of the Bridger Range that received a trace to one inch. Winds were blowing 50-60 mph out of the WNW with the arrival of the frontal passage.
Currently, mountain temperatures are ranging from 5-10⁰ above zero and winds are blowing 10-20 mph out of the WNW. A ridge of high pressure will continue to build over the region today producing clear skies and warmer temperatures. Highs today will climb into the upper 20s to low 30s and winds will stay out of the WNW at 10-20 mph. Mostly sunny skies and warmer temperatures will remain over the area through Sunday.
At 4 a.m. ridgetop winds were blowing 20-30 mph mostly from the S and temperatures were in the 20s F. This morning as a cold front approaches, winds will increase and blow 20-40 mph from the W. Temperatures should drop throughout the day into the teens F and colder by tonight. Snowfall will begin sometime this morning and end this evening. The mountains near West Yellowstone and Cooke City should get 2-4 inches and the mountains near Bozeman and Big Sky should get 1-3 inches. Warmer and drier weather will move back over the area for the weekend.
A warm and windy weather pattern has set up over southwest Montana. At 4 am mountain temperatures are ranging from the high 20s to mid 30s and winds are out of the WSW at 20-40 mph. This strong SW flow did produce snow showers in the southern ranges.
Since yesterday morning the mountains around Cooke City have picked up .7 inches of SWE totaling 4-5 inches of snow while the mountains around West Yellowstone picked up 2-3 inches of new snow. The northern ranges picked up a trace to one inch. Today, mountain temperatures will rise into the mid to high 30s F and winds will continue to blow 20-40 mph out of the WSW. Winds will gradually decrease this evening and Thanksgiving looks to be a warm and pleasant day.
Since the last bulletin on Saturday morning the northern mountains have been dry while the southern areas got dusted with Cooke City getting two inches. Mountain temperatures have substantially warmed from the single digits to high teens as ridgetop winds blew westerly at 20-30 mph. By tomorrow, moist air on a west flow will bring some clouds and a trace to one inch of snow in the south as the northern mountains stays dry and mostly sunny. Temperatures will continue to warm today and Tuesday, but west winds will increase. The rest of the week looks dry and unimpressive for snowfall.
In the northern areas 2-3 inches of snow fell last night as temperatures plummeted to below zero. In the southern mountains 4-6 inches fell with temperatures dropping to the single digits. Winds have been averaging 10-15 mph out of the west with gusts hitting 30 mph. High pressure will build today and temperatures will climb towards normal in the next few days. Other than a few flurries this morning I’m not expecting more snow this weekend. Unfortunately, Thanksgiving week looks to be dry too.
