Issued: 2:25 PM PDT Friday, April 22, 2022
by Dallas Glass

Jump to: Weather Forecast I Precipitation I Snow Level I 5000' Temps I Ridgeline Winds I Extended Weather

Weather Synopsis

A few light showers dot the radar this afternoon, mainly in the Olympics and West Slopes of the Cascades. While a few of these showers could hang around into the evening, all locations should see drying and clearing overnight. A high-pressure ridge will become the driving feature in our weather pattern for the weekend. Clear skies Friday night could allow for weak temperatures inversions to form in the mountain valleys and passes. As a result, expect to see low clouds and patchy fog in some areas. While trailheads may be cold and possibly foggy Saturday morning, temperatures should quickly rise and any clouds dissipate. This will bring us a beautiful warm and sunny day in the mountains. 

Saturday night, clear skies and light winds should once again allow for temperature inversions to form in the valleys and passes. However, with less moisture in the lower atmosphere, any fog should be localized near lakes and rivers. While surface temperatures may cool overnight, the upper atmosphere will not. This will allow temperatures to once again rise quickly on Sunday. For the first half of the day, mostly sunny skies and warm temperatures will dominate. However, as the high-pressure ridge shifts east of the Cascades, clouds out ahead of an approaching storm will start to slide into the region. Even though precipitation should hold off until Sunday night, this change in the sky will hint at the rain and snow to come. 

Weather Forecast

Olympics
West North
West Central
West South
Stevens Pass
Snoqualmie Pass
East North
East Central
East South
Mt. Hood
Use dropdown to select your zone
Friday Night Becoming mostly clear with low clouds.
Saturday Low clouds in the morning, then mostly sunny and warm.
Friday Night Becoming mostly clear with low clouds and fog. Weak inversions possible
Saturday Low clouds and fog in the morning, then becoming mostly sunny and warm.
Friday Night A few stray sprinkles possible in the evening, then becoming mostly clear. Low clouds, fog, and weak temperature inversions possible.
Saturday Low clouds and fog in the morning, then becoming mostly sunny and warm.
Friday Night A few isolated showers in the evening, then becoming mostly clear. Low clouds, fog, and temperature inversions possible. Light to moderate NW winds.
Saturday Low clouds and fog in the morning, then becoming mostly sunny and warm.
Friday Night Mostly cloudy in the evening, then becoming mostly clear with low clouds, fog, and temperature inversions possible. Light to moderate W winds.
Saturday Low clouds and fog in the morning, then becoming mostly sunny and warm. Light W winds.
Friday Night Partly cloudy in the evening, then becoming mostly clear with low clouds, fog, and temperature inversions possible. Light to moderate W winds.
Saturday Low clouds and fog in the morning, then becoming mostly sunny and warm. Light W winds.
Friday Night Becoming mostly clear with patchy low clouds and fog possible. Light to moderate NW winds decreasing.
Saturday Low clouds and fog in the morning, becoming sunny and warm.
Friday Night Becoming mostly clear with patchy low clouds and fog possible. Light to moderate NW winds decreasing.
Saturday Low clouds and fog possible in the morning, then becoming sunny and warm.
Friday Night Becoming mostly clear with patchy low clouds and fog possible. Moderate WNW winds decreasing.
Saturday Low clouds and fog possible in the morning, then becoming sunny and warm.
Friday Night A few isolated showers in the evening, then becoming mostly clear with low clouds, fog, and inversions possible. Moderate WNW winds decreasing.
Saturday Low clouds and fog in the morning, then becoming mostly sunny and warm.

Precipitation (in)

Friday Night Saturday Saturday Night Sunday
5 pm - 5 am 5 am - 5 pm 5 pm - 5 am 5 am - 5 pm
Hurricane Ridge 0 0 LT 0.10 LT 0.10
Mt Baker Ski Area 0 0 0 LT 0.10
Mt. Loop - Barlow Pass 0 0 0 0
Stevens Pass 0 0 0 0
Snoqualmie Pass 0 0 0 0
Crystal Mt LT 0.10 0 0 0
Paradise LT 0.10 0 0 0
White Pass 0 0 0 0
Washington Pass 0 0 0 0
Mission Ridge 0 0 0 0
Salmon la Sac - Gallagher Head 0 0 0 0
Tieton River - Darland Mt. 0 0 0 0
Mt Hood Meadows LT 0.10 0 0 0
Timberline LT 0.10 0 0 0
Hurricane Ridge Precipitation (in)
Friday Night 0
Saturday 0
Saturday Night LT 0.10
Sunday LT 0.10
Mt Baker Ski Area Precipitation (in)
Friday Night 0
Saturday 0
Saturday Night 0
Sunday LT 0.10
Mt. Loop - Barlow Pass Precipitation (in)
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Stevens Pass Precipitation (in)
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Snoqualmie Pass Precipitation (in)
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Crystal Mt Precipitation (in)
Friday Night LT 0.10
Saturday 0
Saturday Night 0
Sunday 0
Paradise Precipitation (in)
Friday Night LT 0.10
Saturday 0
Saturday Night 0
Sunday 0
White Pass Precipitation (in)
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Washington Pass Precipitation (in)
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Mission Ridge Precipitation (in)
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Salmon la Sac - Gallagher Head Precipitation (in)
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Tieton River - Darland Mt. Precipitation (in)
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Mt Hood Meadows Precipitation (in)
Friday Night LT 0.10
Saturday 0
Saturday Night 0
Sunday 0
Timberline Precipitation (in)
Friday Night LT 0.10
Saturday 0
Saturday Night 0
Sunday 0

Snow Level (ft)

Friday Evening Friday Night Saturday Morning Saturday Afternoon Saturday Evening Saturday Night Sunday Morning* Sunday Afternoon*
Olympics 5000' 5000' 5500' 6000' 6500' 6500' 6500' 6000'
West North 4500' 3500' 4500' 6000' 5500' 5000' 6000' 6500'
West Central 4500' 4000' 4500' 6000' 5500' 5000' 6000' 7000'
West South 5000' 4000' 5000' 6500' 6000' 5000' 6500' 7000'
Stevens Pass 4500' 3500' 4500' 6000' 5500' 5000' 6000' 7000'
Snoqualmie Pass 4500' 4000' 4500' 6000' 6000' 5000' 6500' 7000'
East North 5000' 4000' 5000' 6500' 5500' 5000' 6000' 7500'
East Central 5000' 4000' 5000' 7000' 6500' 5000' 6500' 7500'
East South 5000' 4000' 5000' 7000' 6500' 5500' 7000' 7500'
Mt. Hood 5000' 4500' 5000' 7000' 7500' 7000' 7500' 8000'
Olympics Elevation
Friday Evening 5000'
Friday Night 5000'
Saturday Morning 5500'
Saturday Afternoon 6000'
Saturday Evening 6500'
Saturday Night 6500'
Sunday Morning* 6500'
Sunday Afternoon* 6000'
West North Elevation
Friday Evening 4500'
Friday Night 3500'
Saturday Morning 4500'
Saturday Afternoon 6000'
Saturday Evening 5500'
Saturday Night 5000'
Sunday Morning* 6000'
Sunday Afternoon* 6500'
West Central Elevation
Friday Evening 4500'
Friday Night 4000'
Saturday Morning 4500'
Saturday Afternoon 6000'
Saturday Evening 5500'
Saturday Night 5000'
Sunday Morning* 6000'
Sunday Afternoon* 7000'
West South Elevation
Friday Evening 5000'
Friday Night 4000'
Saturday Morning 5000'
Saturday Afternoon 6500'
Saturday Evening 6000'
Saturday Night 5000'
Sunday Morning* 6500'
Sunday Afternoon* 7000'
Stevens Pass Elevation
Friday Evening 4500'
Friday Night 3500'
Saturday Morning 4500'
Saturday Afternoon 6000'
Saturday Evening 5500'
Saturday Night 5000'
Sunday Morning* 6000'
Sunday Afternoon* 7000'
Snoqualmie Pass Elevation
Friday Evening 4500'
Friday Night 4000'
Saturday Morning 4500'
Saturday Afternoon 6000'
Saturday Evening 6000'
Saturday Night 5000'
Sunday Morning* 6500'
Sunday Afternoon* 7000'
East North Elevation
Friday Evening 5000'
Friday Night 4000'
Saturday Morning 5000'
Saturday Afternoon 6500'
Saturday Evening 5500'
Saturday Night 5000'
Sunday Morning* 6000'
Sunday Afternoon* 7500'
East Central Elevation
Friday Evening 5000'
Friday Night 4000'
Saturday Morning 5000'
Saturday Afternoon 7000'
Saturday Evening 6500'
Saturday Night 5000'
Sunday Morning* 6500'
Sunday Afternoon* 7500'
East South Elevation
Friday Evening 5000'
Friday Night 4000'
Saturday Morning 5000'
Saturday Afternoon 7000'
Saturday Evening 6500'
Saturday Night 5500'
Sunday Morning* 7000'
Sunday Afternoon* 7500'
Mt. Hood Elevation
Friday Evening 5000'
Friday Night 4500'
Saturday Morning 5000'
Saturday Afternoon 7000'
Saturday Evening 7500'
Saturday Night 7000'
Sunday Morning* 7500'
Sunday Afternoon* 8000'

5000' Temperatures (°F)

Friday Night Saturday
Max / Min Max / Min
Olympics 34 / 26 46 / 28
West North 35 / 25 43 / 27
West Central 38 / 26 44 / 28
West South 37 / 26 42 / 26
Stevens Pass 36 / 26 41 / 28
Snoqualmie Pass 38 / 27 44 / 39
East North 35 / 21 39 / 23
East Central 37 / 25 43 / 28
East South 37 / 27 44 / 28
Mt. Hood 37 / 28 44 / 28
Olympics 5000' Temperature Forecast
(Max / Min)
Friday Night 34 / 26
Saturday 46 / 28
West North 5000' Temperature Forecast
(Max / Min)
Friday Night 35 / 25
Saturday 43 / 27
West Central 5000' Temperature Forecast
(Max / Min)
Friday Night 38 / 26
Saturday 44 / 28
West South 5000' Temperature Forecast
(Max / Min)
Friday Night 37 / 26
Saturday 42 / 26
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Friday Night 36 / 26
Saturday 41 / 28
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Friday Night 38 / 27
Saturday 44 / 39
East North 5000' Temperature Forecast
(Max / Min)
Friday Night 35 / 21
Saturday 39 / 23
East Central 5000' Temperature Forecast
(Max / Min)
Friday Night 37 / 25
Saturday 43 / 28
East South 5000' Temperature Forecast
(Max / Min)
Friday Night 37 / 27
Saturday 44 / 28
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Friday Night 37 / 28
Saturday 44 / 28

Ridgeline Winds (mph)

Friday Evening Friday Night Saturday Morning Saturday Afternoon
Olympics VAR 0-10 W 0-10 W 0-10 W 0-10
West North W 0-10 W 0-10 VAR 0-10 W 0-10
West Central NW 5-15 NW 5-15 VAR 0-10 W 0-10
West South NW 10-20 NW 10-20 W 5-15 W 0-10
Stevens Pass W 10-20 W 10-20 W 5-15 W 5-15
Snoqualmie Pass W 10-20 W 10-20 W 5-15 W 5-15
East North NW 10-20 NW 5-15 VAR 0-10 W 5-15
East Central NW 10-20 NNW 5-15 VAR 0-10 W 5-15
East South WNW 15-25 NNW 5-15 VAR 0-10 W 5-15
Mt. Hood WNW 15-25 NW 10-20 NW 5-15 W 5-15
Olympics Ridgeline Winds (mph)
Friday Evening VAR 0-10
Friday Night W 0-10
Saturday Morning W 0-10
Saturday Afternoon W 0-10
West North Ridgeline Winds (mph)
Friday Evening W 0-10
Friday Night W 0-10
Saturday Morning VAR 0-10
Saturday Afternoon W 0-10
West Central Ridgeline Winds (mph)
Friday Evening NW 5-15
Friday Night NW 5-15
Saturday Morning VAR 0-10
Saturday Afternoon W 0-10
West South Ridgeline Winds (mph)
Friday Evening NW 10-20
Friday Night NW 10-20
Saturday Morning W 5-15
Saturday Afternoon W 0-10
Stevens Pass Ridgeline Winds (mph)
Friday Evening W 10-20
Friday Night W 10-20
Saturday Morning W 5-15
Saturday Afternoon W 5-15
Snoqualmie Pass Ridgeline Winds (mph)
Friday Evening W 10-20
Friday Night W 10-20
Saturday Morning W 5-15
Saturday Afternoon W 5-15
East North Ridgeline Winds (mph)
Friday Evening NW 10-20
Friday Night NW 5-15
Saturday Morning VAR 0-10
Saturday Afternoon W 5-15
East Central Ridgeline Winds (mph)
Friday Evening NW 10-20
Friday Night NNW 5-15
Saturday Morning VAR 0-10
Saturday Afternoon W 5-15
East South Ridgeline Winds (mph)
Friday Evening WNW 15-25
Friday Night NNW 5-15
Saturday Morning VAR 0-10
Saturday Afternoon W 5-15
Mt. Hood Ridgeline Winds (mph)
Friday Evening WNW 15-25
Friday Night NW 10-20
Saturday Morning NW 5-15
Saturday Afternoon W 5-15

Extended Weather Synopsis

A low-pressure system will start to impact the Northwest Sunday night. Precipitation will spread across the region from west to east. While most locations may start the storm as rain, a trailing cold front will help snow levels lower significantly. Models continue to disagree about the strength of this first round of precipitation, but for the moment, snow accumulations appear modest at best. The low-pressure stalls just off the coast of British Columbia. This will allow additional waves of moisture to sweep over the mountains Tuesday and possibly into the middle of the week. 

Extended Snow Level (ft)

Sunday Night* Monday Monday Night Tuesday
West North 5000' 4000' 3000' 3000'
Snoqualmie Pass 6000' 4500' 3500' 3500'
Mt. Hood 6000' 5000' 4500' 4000'
West North Elevation
Sunday Night* 5000'
Monday 4000'
Monday Night 3000'
Tuesday 3000'
Snoqualmie Pass Elevation
Sunday Night* 6000'
Monday 4500'
Monday Night 3500'
Tuesday 3500'
Mt. Hood Elevation
Sunday Night* 6000'
Monday 5000'
Monday Night 4500'
Tuesday 4000'

Jump to: Weather Forecast I Precipitation I Snow Level I 5000' Temps I Ridgeline Winds I Extended Weather

Previous forecast from Apr 21, 2022

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.

The 5000’ temperature forecast does not imply a trend over the 12 hr period and only represents the max and min temperatures within a 12 hr period in the zone. The 6-hr snow level forecast, the forecast discussion, and weather forecast sections may add detail regarding temperature trends.

The snow level forecast represents the general snow level over a 6 hr time period. Freezing levels are forecast when precipitation is not expected.

*Easterly or offshore flow is highlighted with an asterisk when we expect relatively cool east winds in the major Cascade Passes. Easterly flow will often lead to temperature inversions and is a key variable for forecasting precipitation type in the Cascade Passes. Strong easterly flow events can affect terrain on a more regional scale.

Ridgeline winds are the average wind speed and direction over a 6 hr time period.

The wind forecast represents an elevation range instead of a single elevation slice. The elevation range overlaps with the near and above treeline elevation bands in the avalanche forecast and differs per zone.

Wind direction indicates the direction the wind originates or comes from on the 16-point compass rose.

Water Equivalent (WE) is the liquid water equivalent of all precipitation types; rain, snow, ice pellets, etc., forecast to the hundredth of an inch at specific locations. To use WE as a proxy for snowfall amounts, start with a snow to water ratio of 10:1 (10 inches of snow = 1 inch WE). Temperatures at or near freezing will generally have a lower ratio (heavy wet snow) and very cold temperatures can have a much higher ratio (dry fluffy snow).

The label LT, is shorthand for ‘less than’.

Updated Mountain Weather Zone Name Changes – December 2020