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Western US – Big storm expected to move through the 17th to 20th… Aspen, Bogus Basin, more top to bottom snowfall!
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By late next week and weekend, October 17th through the 20th, a strong and colder than usual storm system moves in across the western US, with snow levels not looking quite as low as the last couple of storms that caused very low elevation snowfall across areas of the inland Northwest (2 snow storms in Coeur d'Alene, Idaho and to Spokane, Washington, who both received several+ inches of snow, the first of which was on September 28th! That snow melted fast, in a day or so, but this latest storm which dropped over 4" of snow at Spokane Airport and similar or more for Coeur d'Alene, Idaho Tuesday night (October 8th), was followed by very unusually cold air, which kept high temperatures in the freezing range on Wednesday, with 1" of snow still on the ground at Spokane airport in northeast Washington (elevation just above 2,000 feet) today (Thursday October 10), after 4" was reported as a snow depth all day Wednesday. So snow has remained measurable and on the ground for 2 days now, another all time record. October 23, 1957 was the last time 4" of snow as recorded as a snow depth, and multi day snow preservation has not been recorded in almost 140 years of records (back to 1881) at Spokane Airport, as far as I can tell. Of course ALL of the resorts saw snow, as we were predicting in several of our weather stories, which are really weather outlooks... Please see below, then scroll down for the charts representing what we see coming late next week and weekend...

Some pertinent weather stories/ weather outlooks that have verified, and the dates published:

August 27, 2019 - - "Fall weather outlooks for Aspen are coming soon, but a quick glimpse: Colder and more snow than usual this season, with another early start."

September 2, 2019 - "...That said, earlier than usual snowfalls are expected in Aspen, probably before mid October again..."

September 11, 2019 - "close to the start of October, progressively colder low pressure will then take aim at the western US and western Canada, including Kingfisher and Revelstoke, with snow levels down to 5,000 feet and lower, for some measurable snow to mid and upper mountain Revelstoke/ and most of Kingfisher's Area of Operation. For southern Idaho expect colder temperatures and chances for snow, mostly light still, but possibly to base areas of Bogus Basin in early October"

September 20, 2019 - "Our partners at Bogus Basin Idaho, Revelstoke Mountain Resort in British Columbia, and Kingfisher Heli also in British Columbia, are expected to receive significant snowfall between the 26th and 30th of September, best snowfall at Revelstoke, moderate to even heavy for the higher elevations, but snow is expected to fall down to 4,000 feet across the region" -snow was "light" at Bogus Basin

and, on October 6, 2019, for Aspen-Snowmass - Our forecast for the October 9 and 10 storm that just went through, as of 4 days in advance:

Forecast totals match closely what was recorded in Aspen... See below photo from @jswansonphoto on Instagram/ Friday, October 11, 2019

Aspen-Snowmass - @jswansonphoto on Instagram/ Friday, October 11, 2019

Now back to the big storm late next week and weekend:

As of Friday morning, October 18th, Jet Stream winds to 130+mph cutting in across Tahoe and northern CA...

As of Friday morning, October 18th, 500mb 10,000 to 25,000 foot moisture looks plentiful across the northwest US and southwest Canada (from off the Pacific this time, for bigger snow potential all across the west)...

As of Friday morning, October 18th, 500mb ("steering flow"), with a 534-dm low pressure system moving in across the northwest US and southwest Canada (strong and cold for so early season)...

As of Friday morning, October 18th, 500mb, 10,000 foot temperatures indicate snow levels near 4,000 to 5,000 feet, some 6,000 across Colorado as the storm moves in next weekend...

As of Friday morning, October 18th, 500mb, rain and snow spreads across the western US and southwest Canada...

Meteorologist/ Chris Manly

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