Issued: 6:50 AM PST Monday, November 27, 2017
by Robert Hahn

Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k

Weather Synopsis for Monday & Saturday

On Monday morning, a splitting upper trough will move across the West Coast, with the main part of the trough across Northern California. Monday afternoon and evening a shortwave ridge moves over the Pacific Northwest. On Tuesday a front crosses the Cascades in the afternoon and then a shortwaves trough will follow.

Weather Forecast

Olympics
Monday Morning

Mostly cloudy with light showers.

Monday Afternoon

Mostly cloudy with a chance of light showers.

Monday Night

Increasing light to moderate rain and snow, mainly after midnight.

Tuesday Morning

Moderate to heavy rain and snow.

Tuesday Afternoon

Light to moderate showers.

Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
Monday Morning

Light to occasionally moderate showers.

Monday Afternoon

Decreasing light showers, heaviest northern part.

Monday Night

Increasing light rain and snow, mainly northern part and after midnight.

Tuesday Morning

Increasing light to moderate rain and snow except moderate to heavy northern part.

Tuesday Afternoon

Decreasing moderate to heavy showers.

East slopes of the Washington Cascades
Monday Morning

Light showers.

Monday Afternoon

Partly to mostly cloudy with a chance of showers higher elevations in the north.

Monday Night

Partly to mostly clear with increasing light rain and snow in the north, after midnight.

Tuesday Morning

Increasing light to moderate rain and snow north and increasing light rain and snow central and south.

Tuesday Afternoon

Decreasing light to moderate showers.

Mt. Hood Area
Monday Morning

Chance of light showers.

Monday Afternoon

Partly to mostly cloudy.

Monday Night

Partly clear.

Tuesday Morning

Increasing light rain and snow.

Tuesday Afternoon

Decreasing moderate to heavy showers.

Snow/Freezing Level (ft)

Hurricane Ridge Mt. Baker Washington Pass Leavenworth Stevens Pass Snoqualmie Pass Mt. Rainier, Crystal & White Pass Mt. Hood
Monday Morning Snow Level 2500' 2500' 2500' ' ' 2500' ' 3000'
Monday Afternoon Snow Level 3000' 2500' 2500' ' ' 3000' ' 3500'
Monday Night Snow Level * 5500' 3500' 200' ' ' 3500' ' 4000'
Tuesday Morning Snow Level * 4000' 3000' 2500' ' ' 4000' ' 5500'
Tuesday Afternoon Snow Level 2500' 2500' 2500' ' ' 3000' ' 3500'
Hurricane Ridge Elevation
Monday Morning Snow Level
2500'
Monday Afternoon Snow Level
3000'
Monday Night Snow Level
5500'
(Easterly Flow *)
Tuesday Morning Snow Level
4000'
(Easterly Flow *)
Tuesday Afternoon Snow Level
2500'
Tuesday Night Snow Level
2500'
Mt. Baker Elevation
Monday Morning Snow Level
2500'
Monday Afternoon Snow Level
2500'
Monday Night Snow Level
3500'
(Easterly Flow *)
Tuesday Morning Snow Level
3000'
(Easterly Flow *)
Tuesday Afternoon Snow Level
2500'
Tuesday Night Snow Level
2000'
Washington Pass Elevation
Monday Morning Snow Level
2500'
Monday Afternoon Snow Level
2500'
Monday Night Snow Level
200'
(Easterly Flow *)
Tuesday Morning Snow Level
2500'
(Easterly Flow *)
Tuesday Afternoon Snow Level
2500'
Tuesday Night Snow Level
2000'
Leavenworth Elevation
Monday Morning Snow Level
'
Monday Afternoon Snow Level
'
Monday Night Snow Level
'
(Easterly Flow *)
Tuesday Morning Snow Level
'
(Easterly Flow *)
Tuesday Afternoon Snow Level
'
Tuesday Night Snow Level
'
Stevens Pass Elevation
Monday Morning Snow Level
'
Monday Afternoon Snow Level
'
Monday Night Snow Level
'
(Easterly Flow *)
Tuesday Morning Snow Level
'
(Easterly Flow *)
Tuesday Afternoon Snow Level
'
Tuesday Night Snow Level
'
Snoqualmie Pass Elevation
Monday Morning Snow Level
2500'
Monday Afternoon Snow Level
3000'
Monday Night Snow Level
3500'
(Easterly Flow *)
Tuesday Morning Snow Level
4000'
(Easterly Flow *)
Tuesday Afternoon Snow Level
3000'
Tuesday Night Snow Level
2500'
Mt. Rainier & Crystal Elevation
Monday Morning Snow Level
'
Monday Afternoon Snow Level
'
Monday Night Snow Level
'
(Easterly Flow *)
Tuesday Morning Snow Level
'
(Easterly Flow *)
Tuesday Afternoon Snow Level
'
Tuesday Night Snow Level
'
Mt. Hood Elevation
Monday Morning Snow Level
3000'
Monday Afternoon Snow Level
3500'
Monday Night Snow Level
4000'
(Easterly Flow *)
Tuesday Morning Snow Level
5500'
(Easterly Flow *)
Tuesday Afternoon Snow Level
3500'
Tuesday Night Snow Level
3000'

* Easterly flow in the Cascade Passes can cause locally lower Snow or Freezing levels than areas further west.
Freezing Level is when no precipitation is forecast.

Precipitation Forecast

Saturday Saturday
Hurricane Ridge LT 0.25 0 - 0.50
Mt Baker Ski Area 0.25 - 0.50 1.00 - 1.50
Washington Pass LT 0.25 0 - 0.75
Stevens Pass LT 0.25 0.75 - 1.00
Snoqualmie Pass LT 0.25 LT 0.25
Mission Ridge LT 0.10 0 - 0.50
Crystal Mt LT 0.10 0 - 0.50
Paradise LT 0.25 0 - 1.00
White Pass LT 0.25 0 - 0.50
Mt Hood Meadows LT 0.25 0.75 - 1.00
LT 0.10 0 - 0.75

Free Winds at 5000' (mph)

Hurricane Ridge Mt. Baker Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Monday Morning WSW 10 - 15 WSW 10 - 15 W 20 - 30 --- - WSW 15 - 20
Monday Afternoon SW 10 - 15 SW 10 - 15 W 15 - 20 --- - WSW 15 - 20
Monday Night S 20 - 40 S 10 - 30 SE 15 - 20 --- - SSW 10 - 15
Tuesday Morning W 20 - 30 S 25 - 35 SE 20 - 30 --- - SSW 15 - 20
Tuesday Afternoon W 20 - 30 W 15 - 20 WSW 15 - 20 --- - WSW 20 - 30
Hurricane Ridge Elevation
Monday Morning WSW 10 - 15
Monday Afternoon SW 10 - 15
Monday Night S 20 - 40
Tuesday Morning W 20 - 30
Tuesday Afternoon W 20 - 30
Tuesday Night W 15 - 20
Mt. Baker Elevation
Monday Morning WSW 10 - 15
Monday Afternoon SW 10 - 15
Monday Night S 10 - 30
Tuesday Morning S 25 - 35
Tuesday Afternoon W 15 - 20
Tuesday Night WSW 10 - 15
Stevens and Snoqualmie Pass Elevation
Monday Morning W 20 - 30
Monday Afternoon W 15 - 20
Monday Night SE 15 - 20
Tuesday Morning SE 20 - 30
Tuesday Afternoon WSW 15 - 20
Tuesday Night W 15 - 20
Mt. Rainier Elevation
Monday Morning --- -
Monday Afternoon --- -
Monday Night --- -
Tuesday Morning --- -
Tuesday Afternoon --- -
Tuesday Night --- -
Mt. Hood Elevation
Monday Morning WSW 15 - 20
Monday Afternoon WSW 15 - 20
Monday Night SSW 10 - 15
Tuesday Morning SSW 15 - 20
Tuesday Afternoon WSW 20 - 30
Tuesday Night W 25 - 35
Hurricane Ridge Direction - Speed
Monday Morning WSW 10 - 15
Monday Afternoon SW 10 - 15
Monday Night S 20 - 40
Tuesday Morning W 20 - 30
Tuesday Afternoon W 20 - 30
Tuesday Night W 15 - 20
Mt. Baker Direction - Speed
Monday Morning WSW 10 - 15
Monday Afternoon SW 10 - 15
Monday Night S 10 - 30
Tuesday Morning S 25 - 35
Tuesday Afternoon W 15 - 20
Tuesday Night WSW 10 - 15
Stevens and Snoqualmie Pass Direction - Speed
Monday Morning W 20 - 30
Monday Afternoon W 15 - 20
Monday Night SE 15 - 20
Tuesday Morning SE 20 - 30
Tuesday Afternoon WSW 15 - 20
Tuesday Night W 15 - 20
Mt. Rainier Direction - Speed
Monday Morning --- -
Monday Afternoon --- -
Monday Night --- -
Tuesday Morning --- -
Tuesday Afternoon --- -
Tuesday Night --- -
Mt. Hood Direction - Speed
Monday Morning WSW 15 - 20
Monday Afternoon WSW 15 - 20
Monday Night SSW 10 - 15
Tuesday Morning SSW 15 - 20
Tuesday Afternoon WSW 20 - 30
Tuesday Night W 25 - 35

Directions above indicate the direction the wind blows from on the 16-point cardinal scale. These winds indicate "free" winds, or those winds in the atmosphere not influenced by terrain. Topographical effects may produce greater or lower wind speeds in certain locations as well as significant variations in direction.

Free Winds at 9000' (mph)

Mt. Baker Washington Pass Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Monday Morning WSW 25 - 35 W 30 - 40 W 30 - 40 --- - W 30 - 40
Monday Afternoon WSW 20 - 30 W 30 - 40 W 30 - 40 --- - W 25 - 35
Monday Night SW 40 - 60 SW 35 - 50 SW 35 - 50 --- - WSW 20 - 30
Tuesday Morning SSW 50 - 70 SSW 40 - 55 SSW 40 - 55 --- - SW 30 - 40
Tuesday Afternoon WSW 20 - 25 WSW 20 - 25 WSW 25 - 35 --- - WSW 30 - 40
Mt. Baker Direction - Speed
Monday Morning WSW 25 - 35
Monday Afternoon WSW 20 - 30
Monday Night SW 40 - 60
Tuesday Morning SSW 50 - 70
Tuesday Afternoon WSW 20 - 25
Tuesday Night WNW 20 - 30
Washington Pass Direction - Speed
Monday Morning W 30 - 40
Monday Afternoon W 30 - 40
Monday Night SW 35 - 50
Tuesday Morning SSW 40 - 55
Tuesday Afternoon WSW 20 - 25
Tuesday Night WNW 30 - 40
Stevens and Snoqualmie Pass Direction - Speed
Monday Morning W 30 - 40
Monday Afternoon W 30 - 40
Monday Night SW 35 - 50
Tuesday Morning SSW 40 - 55
Tuesday Afternoon WSW 25 - 35
Tuesday Night WNW 30 - 45
Mt. Rainier Direction - Speed
Monday Morning --- -
Monday Afternoon --- -
Monday Night --- -
Tuesday Morning --- -
Tuesday Afternoon --- -
Tuesday Night --- -
Mt. Hood Direction - Speed
Monday Morning W 30 - 40
Monday Afternoon W 25 - 35
Monday Night WSW 20 - 30
Tuesday Morning SW 30 - 40
Tuesday Afternoon WSW 30 - 40
Tuesday Night WNW 30 - 45

Directions above indicate the direction the wind blows from on the 16-point cardinal scale. These winds indicate "free" winds, or those winds in the atmosphere not influenced by terrain. Topographical effects may produce greater or lower wind speeds in certain locations as well as significant variations in direction.

Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k

Previous forecast from Nov 26, 2017

The NWAC program is administered by the USDA-Forest Service and operates from the National Weather Service Forecast Office in Seattle. NWAC services are made possible by important collaboration and support from a wide variety of federal, state and private cooperators.