Change may be in store for Colorado mountain weather
The Vail Daily
Aspen, CO Colorado
EAGLE COUNTY, Colo. — The snow news the Colorado high country has been waiting for is finally here – sort of.
The storm track pattern for storms heading into the United States from the Pacific Ocean appears to be shifting south, which is great news for northern ski resorts in Washington, Oregon, Idaho, Wyoming and Montana – and possibly good news for ski resorts in the northern part of Colorado.
The storm track has been following a path this winter that has sent Pacific storms entering North America through British Columbia and Alberta before turning south in Saskatchewan and down through North Dakota and Minnesota, and then following an eastern path across the Midwest and the East. But as of Jan. 16, the path appears to be changing. The new track shows storms entering around Oregon and continuing east and slightly south – the results for Colorado, however, will depend on each individual storm, said Joel Gratz, a meteorologist who runs the powder forecast website http://www.opensnow.com.
“The overall weather pattern for the western United States is definitely changing next week compared to what they were over the last two months,” Gratz said. “Unfortunately, weather patterns don’t detail powder days.”
But a change in the weather pattern means “slightly more favorable” conditions for better snow in Colorado, Gratz said, and even slightly better is music to the ears of many local skiers and snowboarders.
The pattern changes show more certainty for snow for the north, so it’s a waiting game to see whether that snow materializes for Colorado, Gratz said.
“Next week is what starts to make me pull my hair out because we’re so close to possibly getting some snow,” Gratz said. “That (weather pattern) shift is going to happen – all the models are on board – it’s definitely going to happen, but whether that shift is ultimately really, really good for Colorado or just kind of a little bit better (isn’t certain).”
Any shift is good news, though. Backcountry snowboarder and mountaineer Zach Taylor, of Avon, said he’s “psyched to see all the patterns changing.”
“The likelihood of us getting snow increasing is definitely exciting,” Taylor said.
Taylor also knows a lot of new snow brings dangers along with it. Because of the way winter has turned out so far, there are weak layers of snow that will become prime avalanche terrain once heavier snow falls on top. Taylor said all the weak, unstable snow in the snowpack right now is a big cause for concern if and when larger snowstorms hit.
“We’re going to see massive avalanche cycles if (storms) materialize,” Taylor said. “It is something I am worried about.”
Ethan Greene, director at the Colorado Avalanche Information Center, said there are places where the danger is already increasing, but a foot of snow in a 24-hour period, for example, “could change things significantly.”
“We’re actually in a pretty bad set-up for when it does start snowing again,” Greene said.
Greene said there’s also a concern this season for avalanches being triggered in odd ways.
“One thing we’re worried about is avalanches from relatively low angle terrain – areas you might consider safe in some years might not be safe if we go into a big storm cycle coming up,” Greene said. “It’s not going to be very consistent. There’s a complex pattern in the layers in the snow right now. You’ll see safe areas in close proximity to areas that are very dangerous.”
Even the few inches of snow that fell around the state Wednesday – Vail Mountain reported 6 inches and Beaver Creek reported 4 inches – was enough to change the avalanche danger from moderate to considerable. The Colorado Avalanche Information Center reported wind slabs about 1 foot thick on northeast, east, southeast and south aspects as of Thursday morning. The center reported a low danger below treeline, but said backcountry travelers should still look for unstable snow.
That’s the key piece of advice people like Taylor follow – he said too often people make the mistake of looking for stable snow rather than unstable snow.
“You have to look for signs of instability, not for signs of stability – you can always find the stability,” Taylor said. “Always err on the side of caution; read the avalanche report every day before you go out.”
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Interstate 70 is closed Wednesday afternoon at mile-markers 109 (South Canyon) and 114 (West Glenwood) in both directions due to a fire, according to a 3:11 p.m. notification from Garfield County Emergency Communications Authority.