menu

Mountain Weather Forecast

Issued: 1:59 PM PST Monday, February 18, 2019
by Dennis D'Amico

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

Weather Synopsis for Monday night through Wednesday

A quick moving weather system in NW flow aloft will quickly approach the region tonight, with light snow developing early Tuesday morning for Olympics and north/central WA Cascades. This system looks to arrive slightly faster than previous model runs indicated, so snowfall rates may approach moderate during the afternoon for areas north of Snoqualmie Pass. 

Snowfall should quickly ramp up through the evening for all areas before the upper trough passes inland and digs over central Oregon turning steady snow to showers. A subtle warming trend should peak through the late evening for areas near and just south of a weak surface low, roughly from Stevens Pass and south. 

NW flow later Tuesday night through Wednesday morning will provide some orographic enhancement to ramp up snow shower totals along the west slopes of the Cascades and Mt. Hood as well as ridge-crest westerly winds. The low level post-frontal flow looks favorable for dual convergence zones; one downwind of Vancouver Island and one off of the Olympics aimed more into the Crystal-Rainier area. 1-2 feet of snow through Wednesday looks plausible for the aforementioned areas. Showers will decrease Wednesday afternoon for the Washington Cascades as the flow turns more northerly. 

Weather Forecast

Hurricane Ridge
Monday Night Partly to mostly cloudy in the evening, becoming overcast with light snow developing late.
Light snow, possibly becoming light to moderate in the afternoon. Increasing west winds.
Mt. Baker
Monday Night Mostly cloudy in the evening, becoming overcast with light snow developing late.
Light snow, possibly becoming light to moderate in the afternoon.
Washington Pass and Leavenworth
Monday Night Mostly cloudy in the evening, becoming overcast overnight.
Periods of light snow.
Stevens and Snoqualmie Pass
Monday Night Mostly cloudy in the evening, becoming overcast with light snow developing late. Light west wind in the Passes.
Light snow, possibly becoming light to moderate in the afternoon. Light to moderate west wind in the Passes.
Mt. Rainier, Crystal and White Pass
Monday Night Mostly cloudy in the evening, becoming overcast overnight.
Cloudy with light snow developing in the morning.
Mt. Hood
Monday Night Mostly cloudy in the evening, becoming overcast overnight.
Cloudy with light snow developing in the morning. Increasing W-NW winds.

Snow/Freezing Level (ft)

Hurricane Ridge Mt. Baker Washington Pass Leavenworth Stevens Pass Snoqualmie Pass Mt. Rainier, Crystal & White Pass Mt. Hood
Monday Evening Freezing Level 2000' 1000' 1000' 1000' 1500' 1500' 2000' 2000'
Monday Night Freezing Level 1000' 0' 0' 0' 500' 500' 1000' 1000'
Tuesday Morning Snow Level 500' 0' 0' 0' 500' 500' 500' 1000'
Tuesday Afternoon Snow Level 2000' 1500' 1000' 1000' 1500' 1500' 2000' 2000'
Tuesday Evening Snow Level 2500' 1500' 1000' 1000' 2000' 2000' 2500' 2500'
Tuesday Night Snow Level 1000' 1000' 1000' 1000' 1500' 1500' 2000' 2000'
Wednesday Morning Snow Level 500' 500' 500' 500' 500' 500' 1000' 1000'
Hurricane Ridge Elevation
Monday Evening Freezing Level
2000'
Monday Night Freezing Level
1000'
Tuesday Morning Snow Level
500'
Tuesday Afternoon Snow Level
2000'
Tuesday Evening Snow Level
2500'
Tuesday Night Snow Level
1000'
Wednesday Morning Snow Level
500'
Wednesday Afternoon Snow Level
1500'
Mt. Baker Elevation
Monday Evening Freezing Level
1000'
Monday Night Freezing Level
0'
Tuesday Morning Snow Level
0'
Tuesday Afternoon Snow Level
1500'
Tuesday Evening Snow Level
1500'
Tuesday Night Snow Level
1000'
Wednesday Morning Snow Level
500'
Wednesday Afternoon Snow Level
1500'
Washington Pass Elevation
Monday Evening Freezing Level
1000'
Monday Night Freezing Level
0'
Tuesday Morning Snow Level
0'
Tuesday Afternoon Snow Level
1000'
Tuesday Evening Snow Level
1000'
Tuesday Night Snow Level
1000'
Wednesday Morning Snow Level
500'
Wednesday Afternoon Snow Level
1500'
Leavenworth Elevation
Monday Evening Freezing Level
1000'
Monday Night Freezing Level
0'
Tuesday Morning Snow Level
0'
Tuesday Afternoon Snow Level
1000'
Tuesday Evening Snow Level
1000'
Tuesday Night Snow Level
1000'
Wednesday Morning Snow Level
500'
Wednesday Afternoon Snow Level
1500'
Stevens Pass Elevation
Monday Evening Freezing Level
1500'
Monday Night Freezing Level
500'
Tuesday Morning Snow Level
500'
Tuesday Afternoon Snow Level
1500'
Tuesday Evening Snow Level
2000'
Tuesday Night Snow Level
1500'
Wednesday Morning Snow Level
500'
Wednesday Afternoon Snow Level
1500'
Snoqualmie Pass Elevation
Monday Evening Freezing Level
1500'
Monday Night Freezing Level
500'
Tuesday Morning Snow Level
500'
Tuesday Afternoon Snow Level
1500'
Tuesday Evening Snow Level
2000'
Tuesday Night Snow Level
1500'
Wednesday Morning Snow Level
500'
Wednesday Afternoon Snow Level
1500'
Mt. Rainier & Crystal Elevation
Monday Evening Freezing Level
2000'
Monday Night Freezing Level
1000'
Tuesday Morning Snow Level
500'
Tuesday Afternoon Snow Level
2000'
Tuesday Evening Snow Level
2500'
Tuesday Night Snow Level
2000'
Wednesday Morning Snow Level
1000'
Wednesday Afternoon Snow Level
1500'
Mt. Hood Elevation
Monday Evening Freezing Level
2000'
Monday Night Freezing Level
1000'
Tuesday Morning Snow Level
1000'
Tuesday Afternoon Snow Level
2000'
Tuesday Evening Snow Level
2500'
Tuesday Night Snow Level
2000'
Wednesday Morning Snow Level
1000'
Wednesday Afternoon Snow Level
1500'

* 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

Monday Night Tuesday Tuesday Night Wednesday
4 pm - 4 am 4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge LT 0.10 0.25 0.25 LT 0.10
Mt Baker Ski Area LT 0.10 0.25 0.25 - 0.50 LT 0.25
Washington Pass 0 LT 0.10 LT 0.25 LT 0.10
Leavenworth 0 LT 0.10 LT 0.10 LT 0.10
Stevens Pass LT 0.10 0.25 0.75 0.25
Snoqualmie Pass LT 0.10 0.25 0.75 - 1.00 0.25
Mission Ridge 0 LT 0.10 LT 0.25 LT 0.10
Crystal Mt 0 LT 0.10 0.50 LT 0.25
Paradise 0 0.25 0.75 - 1.00 LT 0.25
White Pass 0 LT 0.25 0.50 - 0.75 LT 0.25
Mt Hood Meadows 0 LT 0.10 0.75 - 1.00 0.25
0 LT 0.25 1.00 - 1.50 0.25 - 0.50
Hurricane Ridge Precipitation Forecast
Monday Night LT 0.10
Tuesday 0.25
Tuesday Night 0.25
Wednesday LT 0.10
Mt Baker Ski Area Precipitation Forecast
Monday Night LT 0.10
Tuesday 0.25
Tuesday Night 0.25 - 0.50
Wednesday LT 0.25
Washington Pass Precipitation Forecast
Monday Night 0
Tuesday LT 0.10
Tuesday Night LT 0.25
Wednesday LT 0.10
Leavenworth Precipitation Forecast
Monday Night 0
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.10
Stevens Pass Precipitation Forecast
Monday Night LT 0.10
Tuesday 0.25
Tuesday Night 0.75
Wednesday 0.25
Snoqualmie Pass Precipitation Forecast
Monday Night LT 0.10
Tuesday 0.25
Tuesday Night 0.75 - 1.00
Wednesday 0.25
Mission Ridge Precipitation Forecast
Monday Night 0
Tuesday LT 0.10
Tuesday Night LT 0.25
Wednesday LT 0.10
Crystal Mt Precipitation Forecast
Monday Night 0
Tuesday LT 0.10
Tuesday Night 0.50
Wednesday LT 0.25
Paradise Precipitation Forecast
Monday Night 0
Tuesday 0.25
Tuesday Night 0.75 - 1.00
Wednesday LT 0.25
White Pass Precipitation Forecast
Monday Night 0
Tuesday LT 0.25
Tuesday Night 0.50 - 0.75
Wednesday LT 0.25
Mt Hood Meadows Precipitation Forecast
Monday Night 0
Tuesday LT 0.10
Tuesday Night 0.75 - 1.00
Wednesday 0.25
Timberline Precipitation Forecast
Monday Night 0
Tuesday LT 0.25
Tuesday Night 1.00 - 1.50
Wednesday 0.25 - 0.50

Free Winds at 5000' (mph)

Hurricane Ridge Mt. Baker Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Monday Evening W 0 - 10 W 0 - 10 W 5 - 15 W 0 - 10 WNW 10 - 20
Monday Night W 0 - 10 SW 0 - 10 W 5 - 15 W 0 - 10 W 10 - 20
Tuesday Morning W 10 - 20 SW 5 - 15 W 5 - 15 W 5 - 15 W 15 - 25
Hurricane Ridge Elevation
Monday Evening W 0 - 10
Monday Night W 0 - 10
Tuesday Morning W 10 - 20
Tuesday Afternoon W 15 - 25
Mt. Baker Elevation
Monday Evening W 0 - 10
Monday Night SW 0 - 10
Tuesday Morning SW 5 - 15
Tuesday Afternoon SW 10 - 20
Stevens and Snoqualmie Pass Elevation
Monday Evening W 5 - 15
Monday Night W 5 - 15
Tuesday Morning W 5 - 15
Tuesday Afternoon WSW 10 - 20
Mt. Rainier Elevation
Monday Evening W 0 - 10
Monday Night W 0 - 10
Tuesday Morning W 5 - 15
Tuesday Afternoon W 10 - 20
Mt. Hood Elevation
Monday Evening WNW 10 - 20
Monday Night W 10 - 20
Tuesday Morning W 15 - 25
Tuesday Afternoon W 20 - 30
Hurricane Ridge Direction - Speed
Monday Evening W 0 - 10
Monday Night W 0 - 10
Tuesday Morning W 10 - 20
Tuesday Afternoon W 15 - 25
Mt. Baker Direction - Speed
Monday Evening W 0 - 10
Monday Night SW 0 - 10
Tuesday Morning SW 5 - 15
Tuesday Afternoon SW 10 - 20
Stevens and Snoqualmie Pass Direction - Speed
Monday Evening W 5 - 15
Monday Night W 5 - 15
Tuesday Morning W 5 - 15
Tuesday Afternoon WSW 10 - 20
Mt. Rainier Direction - Speed
Monday Evening W 0 - 10
Monday Night W 0 - 10
Tuesday Morning W 5 - 15
Tuesday Afternoon W 10 - 20
Mt. Hood Direction - Speed
Monday Evening WNW 10 - 20
Monday Night W 10 - 20
Tuesday Morning W 15 - 25
Tuesday Afternoon W 20 - 30

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 Evening NW 10 - 20 NW 20 - 30 NW 20 - 30 NW 20 - 30 NW 20 - 30
Monday Night WSW 10 - 20 NW 10 - 20 NW 25 - 35 NW 25 - 35 NW 20 - 30
Tuesday Morning W 10 - 20 W 10 - 20 NW 25 - 35 NW 20 - 30 NW 30 - 40
Mt. Baker Direction - Speed
Monday Evening NW 10 - 20
Monday Night WSW 10 - 20
Tuesday Morning W 10 - 20
Tuesday Afternoon W 20 - 30
Washington Pass Direction - Speed
Monday Evening NW 20 - 30
Monday Night NW 10 - 20
Tuesday Morning W 10 - 20
Tuesday Afternoon W 20 - 30
Stevens and Snoqualmie Pass Direction - Speed
Monday Evening NW 20 - 30
Monday Night NW 25 - 35
Tuesday Morning NW 25 - 35
Tuesday Afternoon WNW 30 - 40
Mt. Rainier Direction - Speed
Monday Evening NW 20 - 30
Monday Night NW 25 - 35
Tuesday Morning NW 20 - 30
Tuesday Afternoon W 25 - 35
Mt. Hood Direction - Speed
Monday Evening NW 20 - 30
Monday Night NW 20 - 30
Tuesday Morning NW 30 - 40
Tuesday Afternoon WNW 30 - 40

Extended Weather Synopsis for Wednesday night through Friday

Showers should taper off Wednesday night as shortwave ridging quickly moves toward the area. Thursday and Thursday night should be mostly dry and cool before a very similar looking weather system in NW flow approaches the area on Friday. If the current track and timing hold, light snow should spread to all areas on Friday and increase during the day. 

Extended Snow/Freezing Levels

Mt. Baker Snoqualmie Pass Mt. Hood Easterly Flow *
Wednesday Night Snow Level 500' - 1500' 500' - 1500' 500' - 1500'
Thursday Freezing Level 2000' - 3000' 2500' - 3500' 2500' - 3500'
Thursday Night Freezing Level 0' - 1000' 0' - 1000' 500' - 1500'
Mt. Baker Elevation
Wednesday Night Snow Level
500' - 1500'
Thursday Freezing Level
2000' - 3000'
Thursday Night Freezing Level
0' - 1000'
Friday Snow Level
0' - 1000'
Snoqualmie Pass Elevation
Wednesday Night Snow Level
500' - 1500'
Thursday Freezing Level
2500' - 3500'
Thursday Night Freezing Level
0' - 1000'
Friday Snow Level
500' - 1500'
Mt. Hood Elevation
Wednesday Night Snow Level
500' - 1500'
Thursday Freezing Level
2500' - 3500'
Thursday Night Freezing Level
500' - 1500'
Friday Snow Level
1000' - 2000'

* 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.

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

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.