NOAA: Winter Storm Warning Issued For Washington | Mountain Accumulations Of Up To 25″ Today – Thursday

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PINK= Winter Storm Warning. PURPLE= Winter Weather Advisory. Image: NOAA

The National Weather Service has issued Winter Storm Warnings and Winter Weather Advisories for Washington. It’s in effect until Thursday Evening. Heavy snowfall is expected to hit the mountains, with light-to-moderate precipitation impacting the valleys.

Mountain Accumulations Of Up To 25″ Today – Thursday

7 day snowfall totals. Image: Tropical Tidbits
7 day precipitation totals. Image: NOAA

Heavy snowfall is expected to occur in the mountains, but light-to-moderate snowfall is forecasted to occur above 2,000ft.

Additional Storm Info:

Winter Storm Area. Image: NOAA Spokane, WA
Storm impacts. Image: NOAA Spokane, WA

Washington: Mountain Accumulations Of Up To 25″ Today – Thursday

* Total snow accumulations of 6 to 10
  inches, with mountain accumulations 
  up to 25 inches, are expected.
- NOAA Spokane, WA
6-10 day temperature outlook. Image: NOAA
6-10 day precipitation outlook. Image: NOAA

WA Winter Storm Warning:

URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
329 AM PST Wed Feb 28 2018

...Winter Storm to bring Heavy Mountain Snow and Locally Heavy
Valley Accumulations Tonight and Thursday...

.A slow moving low pressure system will bring several rounds of
heavy mountain snow beginning this afternoon and lasting through
Thursday. Motorists with plans to travel over the Cascade Passes
or over Sherman Pass in north central Washington will experience
winter driving conditions. The valleys of the East Slopes of the
Cascades, northeast Washington, and the north Idaho Panhandle will
have the potential for wet and locally heavy snow accumulations,
possibly mixed with some rain on Thursday. Lowland accumulations
may vary considerably with marginal temperatures leading to snow
accumulating much more efficiently in some areas than others.

East Slopes Northern Cascades-
Including the following locations Leavenworth, Mazama, Twisp,
Winthrop, Stehekin, Conconully, Blewett Pass, and Loup Loup Pass

...WINTER STORM WARNING IN EFFECT FROM 10 AM THIS MORNING TO
10 PM PST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 10
  inches, with mountain accumulations up to 25 inches, are
  expected.

* WHERE...Leavenworth, Mazama, Twisp, Winthrop, Stehekin,
  Conconully, Blewett Pass, and Loup Loup Pass.

* WHEN...From 10 AM this morning to 10 PM PST Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be
  prepared for significant reductions in visibility at times.

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