Summary: Heavy, accumulating snow is likely today in the Cascades and Sierra Nevada, ahead of a developing winter storm expected to produce the first widespread and significant snow of the season across parts of the Sierra Nevada, Intermountain West, Central Rockies, and central High Plains tomorrow and Friday. Meanwhile, light snow is expected from the Ohio Valley and upper Great Lakes into the Northeast today and tomorrow. Winter Advisories: Washington, Oregon, California, Idaho, Nevada, Montana, Wyoming, Utah, Colorado, South Dakota, Nebraska, Minnesota, Iowa, Wisconsin, Michigan, New York, Maine
Washington
Winter Storm Warning
Heavy snow expected today above 2000ft in the Cascades
- 12-18 inches of snow
- 35-50mph wind gusts
- From 4 AM Wednesday to 10 AM PST Thursday
Impacting Transit along I-90 and US-2 including through Snoqualmie and Stevens Passes
Winter Weather Advisory
Snow expected today above 3000ft in the Olympic Mountains
- 6-9 inches of snow
- From 4 AM Wednesday to 5 AM PST Thursday
Oregon
Winter Weather Advisory
Snow expected today above 2000 in the Cascades
- 8-16 inches of snow
- 35mph wind gusts
- From 4 AM Wednesday to 9 PM PST Thursday
Expected to impact transit through the mountains, including along US-26 and US-20
California
Winter Weather Advisory
Snow expected to begin this evening across the Sierra Nevada
- 6-12 inches of snow, up to 15 locally
- 50-60mph wind gusts
- From 7 PM PST Wednesday evening until 4 PM PST Thursday afternoon
Expected to impact transit through the mountains, including along I-80 through Donner Pass
Idaho
Winter Weather Advisory
Wintry mix expected this morning across the northern panhandle
- 2 inches of snow
- Glaze of ice
- Until 7 AM PST Wednesday
Nevada
Winter Weather Advisory
Snow expected later today across much of the state
- 3-6 inches of snow across lower elevations
- 7-10 inches across higher elevations
- 35mph wind gusts
- From 4 PM Wednesday to 4 PM PST Thursday
Montana
Winter Weather Advisory
Mixed precipitation occurring this morning across northwest MT
- 1 inch of snow
- 1/10th inch of ice
- 40mph wind gusts
- From 1 AM to 8 AM MST Wednesday
Wyoming
Winter Weather Advisory
Snow expected to begin tomorrow across southern WY
- 3-6 inches of snow
- 35mph wind gusts
- From 5 AM Thursday to 5 AM MST Friday
Utah
Winter Storm Watch
Heavy snow possible beginning this afternoon across much of the state
- 8-18 inches of snow
- 35mph wind gusts
- From Wednesday afternoon through Thursday afternoon
Could impact transit along I-80
Colorado
Winter Storm Watch
Heavy snow expected to begin this evening across western CO
- 1-3 feet of snow
- 50mph wind gusts
- From late Wednesday evening through late Friday afternoon
Could impact transit along I-70
South Dakota
Winter Storm Watch
Heavy snow possible Friday across southern SD
- 5-6 inches of snow
- From Friday morning through Friday evening
Nebraska
Winter Storm Watch
Heavy snow possible late Thursday night across northern NE
- 6+ inches of snow
- From late Thursday night through Friday afternoon
Minnesota
Winter Storm Watch
Heavy snow possible on Friday across southeast MN
- 4-6 inches of snow
- From Friday afternoon through late Friday night
Iowa
Winter Storm Watch
Heavy snow possible on Friday across northern IA
- 4-6 inches of snow
- From Friday afternoon through late Friday night
Wisconsin
Winter Storm Watch
Heavy snow possible on Friday across west central WI
- 4-8 inches of snow
- From Friday afternoon through late Friday night
Michigan
Winter Weather Advisory
Lake effect snow continuing this morning across western MI
- 3 inches additional snow
- Until noon EST today
New York
Winter Weather Advisory
Lake effect snow continuing today across western NY
- 3-6 inches additional snow
- Until 7 PM EST this evening
Maine
Winter Weather Advisory
Snow expected this afternoon across eastern MW
- 4-6 inches of snow
- From 1 PM this afternoon to 9 AM EST Thursday
Wind Advisories are also in effect for parts of California, Montana, Wyoming, and New Mexico
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