Winter storm warning: Up to 16 inches of snow and 55 mph winds coming this week

Tire standing upright on snow-covered road with cars in background

Heavy mountain snow is now giving way to powerful winds across the Northern Rockies, with up to 16 inches forecast in Montana’s Anaconda Pintler range and gusts up to 55 mph expected on the Beartooth Highway by Monday.

Peak Driving Danger Window
Monday morning for snow on the western passes, then Monday afternoon for wind on the Beartooth Highway, with the worst road conditions overnight when wet snow refreezes.
A Storm That Turns From Snow To Wind
The storm is now shifting from a snow event to a wind event. The weekend brought heavy snow to the high passes of central Idaho and southwest Montana, and road cameras caught it piling up on Big Hole and Lost Trail. By Monday the snow is winding down, and the wind becomes the bigger problem, with gusts to 55 mph on the Beartooth Highway. The cold is what most people will notice. Temperatures are down 20 to 30 degrees, valley highs are stuck in the 40s and 50s, and a frost is possible Monday morning.
The National Weather Service in Missoula holds a winter storm warning above 6,500 feet for the Lemhi, Bitterroot and Sapphire ranges until 9 AM Monday. Snow runs 4 to 8 inches, with up to 16 across the Anaconda Pintler Mountains near Georgetown Lake. The warning grew out of the winter storm watch first posted for these Idaho and West Yellowstone passes. Great Falls added a warning for Northwest Beaverhead County, with more than a foot up high.
Timing
Overnight into Monday morning: Snow continues on the high passes, with the overnight refreeze the main road threat.
Monday morning: Snow tapers on the western passes, and temperatures crash 20 to 30 degrees from late-week highs, with frost possible in some valleys behind the system.
Monday afternoon: Gusts climb to 55 mph on the Beartooth Highway, and to 50 mph across the Snake River Plain and southern Idaho along Interstate 15, enough to shove high-profile vehicles on exposed roads. The Missoula warnings end at 9 AM, the Great Falls alerts at noon, and the Beartooth advisory at 6 PM.
Tuesday and midweek: A second, colder trough out of the Gulf of Alaska keeps snow levels dipping toward 6,200 feet, so the high country stays wintry even after this round winds down.

Where The Storm Hits The Road


For drivers, the passes carry the risk. US 93 over Lost Trail Pass on the Montana and Idaho line sits deep in the snow band, and Chief Joseph Pass on MT 43 and Big Hole Pass see the same slush near the summit. Lemhi Pass and the climb on Idaho Highway 28 turn from mud to snow first, while Monida Pass on Interstate 15 is the main interstate crossing where snow could still affect travel. The Missoula office told travelers to “consider delaying travel across the backcountry and higher elevations.”

Source: Winter storm warning: Up to 16 inches of snow and 55 mph winds coming this wee

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Snow in the weather forecast? Unusual storm could bring flakes to Massachusetts Saturday.

snow covered shrubs in winter landscape

Believe it or not, the possibility of snow is in the weekend weather forecast for part of Massachusetts. It would be one thing to have a rainy day, like last Sunday, but the forecast for this Saturday truly takes the cake and has even our weather team shaking their heads. We have issued a NEXT Weather Alert for late Friday and Saturday for a very chilly, wet and windy spring storm in the Boston area. This is a highly anomalous storm for a number of reasons.   Omega Block affecting Boston weather Take a look at the jet stream forecast in the coming days. You don’t need a degree in meteorology to recognize that something isn’t right.

WBZ-TV graphic CBS Boston There will be a huge ridge of high pressure extending from the Midwest way up into Canada. This will bring record heat to areas up near Hudson Bay with temperatures expected to top 80 degrees. Conversely, major troughs in the jetstream will form on either side of that giant ridge, one in the Pacific Northwest and another right over New England. This specific configuration is known as an “Omega Block,” and when you get this much twisting and turning, some wild weather is bound to occur. And, wouldn’t you know it, New England is in just the right (or wrong) place. The storm is literally coming right out of the Arctic Circle and making a beeline for our backyard. Boston weekend weather forecast There will be a few showers Friday evening and overnight. The storm will peak during the day on Saturday when a band of windswept rain will pivot from north to south across central and eastern Massachusetts.

It will have the feel of a nor’easter at times on Saturday, with strong northeast winds pushing waves of rainfall inland. Winds will gust between 30-to-50 mph within that band of heavy rainfall, perhaps even leading to some minor tree damage.

Source: Snow in the weather forecast? Unusual storm could bring flakes to Massachusetts Saturday. – CBS Boston

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