In the Madison and Bridger Ranges, 1-2” of snow fell Friday night while the rest of the advisory area remained dry for the weekend. West to southwest winds ramped up Sunday to 20-40 mph with gusts in the 60s mph and largely above freezing temperatures. This week, temperatures will stay below freezing in the southern ranges while the northern ranges will reach the 30s and 40s F during the day. Moderate to strong winds from the southwest will return to the mountains Tuesday afternoon. There is a chance for 1-2” of new snow Monday night, but we have to wait for the weekend for our next chance for significant precipitation.
Only an inch or two of new snow fell over the last two days. Moderate southwest to northwest winds have been gusting to 35-50 mph. This morning temperatures in the Bridgers have risen into the high 30s and 40s F, while the rest of the advisory is in the teens and 20s F. Temperatures over the weekend will be in the 20s to high 30s F under partly cloudy skies with moderate southwest-west winds. There may be a sprinkling of snow tonight, but the next chance for real accumulation is towards the middle or end of next week.
Last night the mountains received 3-6 inches of snow. Wind has been out of the northwest at 10-15 mph with gusts of 25-40 mph. This morning temperatures are mid-teens to low 20s F. Today temperatures will reach mid-20s F and wind will be west-northwest at 10-25 mph with clearing skies. The next few days will be partly cloudy to mostly sunny with temperatures reaching low 30s F during the day and teens to low 20s F at night. On Thanksgiving, strong westerly wind is expected with gusts up to 30-40 mph. There is a slight chance for maybe an inch of snow on Friday night.
By Saturday morning 10” of snow fell in Hyalite with 4-7” everywhere else. It’s been clear since then, but windy at the ridgetops, especially around Bozeman. Yesterday, gusts approached 50 mph from the west and blew 10-20 mph over the weekend. Temperatures were mostly below freezing during the day and teens at night.
This week will be mostly dry other than a chance of 1-2” of snow falling Tuesday night. Winds will remain gusty out of the west through the early week. Mountain temperature will reach into the 40s today and cool the rest of the week with highs near freezing and lows in the teens.
Since Monday morning, a trace to 2 inches of snow has fallen across the advisory area. Temperatures cooled dramatically on Monday, getting down into the single digits F and staying below or near freezing for the rest of the week. Strong winds have been out of the west and southwest.
Snow will begin today and continue overnight. Expect 3-5 inches of new snow around Bozeman and Big Sky, 2-4 inches around West Yellowstone and 1-3 inches near Cooke City before snowfall tapers off tomorrow morning. Temperatures over the weekend will range from the low 20s to high 30s F. Skies will clear tomorrow and stay clear on Sunday. Winds will be moderate out of the southwest and west.
Since Friday morning the mountains around Cooke City received 7” of dense snow with 2” in the Southern Madison Range. Temperatures were near freezing to the mid-40s F for the weekend with 15-25 mph winds and strong gusts from the west to southwest.
Mountain temperatures will range from the upper 30s to 50 degrees F on Monday before cooling and remaining below freezing for the remainder of the week. Snow returns with 1-3” Tuesday into Wednesday and another round of precipitation arriving as we head into the weekend. Winds from the southwest to the west will be 25-35 mph with gusts of 50-60 mph until midweek.
Since last Sunday the mountains received 8-12” of snow. Wind has been 10-20 mph with gusts of 35-40 mph, generally out of the west with shifts to northwest and southwest. Temperatures are high 20s to low 30s F this morning. Today, temperatures will reach mid-30s to low 40s F under mostly cloudy skies with a chance for light precipitation.
Weather this weekend will be windy and warm, with a little water. Westerly wind will increase to 30-40 mph with gusts near 60 mph, and temperatures will reach mid-30s to low 40s F during the day and drop to high 20s F at night. Occasional showers on Saturday and Sunday could produce 1-3” inches of snow in the mountains with 4-7” near Cooke City. Colder temperatures will return Tuesday with chances for snow mid-week and next weekend.
Last night’s storm dropped 6-9” of heavy snow in the Bridger Range, near West Yellowstone, and Cooke City with 1-2” near Big Sky and in Hyalite. Overnight wind was out of the southwest at 15-25 mph with gusts of 40-60 mph. Today wind will be west-southwest at 15-25 mph and temperatures will reach low 30s F. A couple more inches of snow may fall by the end of today. Monday will host mostly clear skies with temperatures in the low 30s F. The next round of snow is slated for Tuesday night and Wednesday.
Since Sunday evening, 6 inches to a little over 1 ft of snow has accumulated across Southwest Montana (photo and weather log). Snowfall will taper off today as the storm system moves to our east. There may be a few more snow showers on Wednesday and Thursday before warmer and dryer conditions return for the following week.
For current weather data check SNOTEL sites throughout our advisory area and our weather log which will be updated throughout the fall. The GNFAC will be installing our weather stations as conditions allow in the coming weeks.
Spring weather can be highly variable and create a mix of avalanche problems to watch for. Snow conditions and snow stability can change drastically from day to day or hour to hour. Anticipate rapid change and plan accordingly. Plenty of snowfall over the winter with more spring snow to come makes avalanches possible into summer.