From The Weather Desk
HEADLINE... Oct 17th - The Climate Prediction Center reissued a La Niña watch today after discontinuing it last month, citing new model data and more favorable trends toward its formation in late fall or early winter.
Oct 19, 2016 - Wednesday at 9:20am PST
Today: Lingering snow showers are the case for much of southwestern Montana and Wyoming, south to northern Colorado.
Thursday: - Rain and high elevation snow across the Pacific Northwest, dry and mostly sunny elsewhere.
Friday and Saturday: - A mix of sun and rain/ high elevation snow across the Pacific Northwest (decreased activity and clearing on Saturday), dry and mostly sunny elsewhere.
Sunday through Tuesday: - A new low pressure system moves in offshore of the Pacific Northwest (increased rain and higher elevation snow), affecting Tahoe and Montana/ Wyoming also, "mostly" dry everywhere else.
Today: - Lingering mostly light snow showers are the case for much of southwestern Montana and Wyoming, south to northern Colorado, as a low pressure system moves through these areas, just clipping Colorado. The rest of the western US looks mostly sunny and milder under a strengthening ridge of upper-level high pressure. The Pacific Northwest has another low pressure system approaching...
Thursday: - More low pressure moves in across the Pacific Northwest, not that impressive or cold, with rain and high elevation (mostly above the resorts) snow expected across the Pacific Northwest and northern Rocky Mountains including north Idaho and the Inland Northwest. Snow levels go from 5,000 feet, rising to near 8,000 feet across the Cascades in 1-2" of (mostly) rain, and those snow levels are between mostly 5,000 and 6,000 feet across north Idaho and the inland Northwest, with mostly under 1" of rain, and some snow to upper resort elevations (initially we see snow to 4,000 feet across the Inland Northwest US Thursday morning, quickly rising). The rest of the western US looks dry and mostly sunny under a continued ridge of high pressure.
Friday and Saturday: - Less prominent rain and high elevation (mostly above the resorts) snow is expected across the Pacific Northwest and northern Rocky Mountains including north Idaho and the Inland Northwest on Friday, into Saturday, clearing on Saturday to some sunshine across the Pacific Northwest and Inland Northwest. Snow levels run between 5,000 and 6,000 feet across the Cascades, and between 6,000 and 7,000 feet across north Idaho and the inland Northwest, plus northern Rocky Mountains to Whitefish, Montana, with light rain and snow. The rest of the western US continues dry and mostly sunny under a continued ridge of high pressure.
Sunday through Tuesday: - A new low pressure system moves in offshore of the Pacific Northwest, sending waves of energy through the region each day, from the Cascades, south to Tahoe (by Monday), and east to western Montana. It looks like Tuesday could be a day that Pacific Northwest resort areas, including the Inland Northwest and east to Whitefish, see some base to top dustings of snow as snow levels drop to between 4,000 and 5,000 feet. This new round of "weather" is also expected to pull some subtropical moisture north and into Utah/ Colorado Monday/ Tuesday, for some showers but no snow excitement (relatively warm air mass). Monday and Tuesday we see this low pressure shift southward some, for snow from Sun Valley ID to Big Sky MT.
LONGER RANGE OUTLOOK
Last days of October: - More storms move into the west, this time focusing most energy and potential snow on Utah and Colorado, but still causing lighter to moderate snow across all resort elevations of Tahoe and the Pacific Northwest. It looks like this period will showcase stronger storms and colder air, the reason for our expectation of snow to all resort regions (base to top snowfall) across the Northwest, also all snow to Utah and Colorado including to Aspen-Snoqmass and southwest Colorado. Some areas further south like Taos Ski Valley should also see some snow in this time frame, albeit likely to be light. CM