Issued: 7:00 AM PST Sunday, January 22, 2023
by Robert Hahn

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

Weather Synopsis

A trough exits the region today as an offshore ridge edges into the region. Very light snow showers and weak convergence dwindling quickly along the Cascades west slopes foothills to start the day. Most areas will experience cooler-than-average weather with highs in the 20s. Moderate WNW ridgeline winds for Mt. Hood and the Cascade Crest areas south of I-90 should decrease throughout the day but will continue to trap some low clouds west of the Cascades with drying downslope winds producing mostly sunny skies east of the Crest.

The high-pressure gains increased influence Sunday night, but a weakening frontal boundary riding over the top of it will keep it relatively flat. Increased high clouds spread into the region with 5000 ft temperatures in the upper 10s to mid 20s.

Monday starts chilly. The weak front passing through during the morning could bring a dusting to 2" of snow to the west slopes of the Olympics and the Cascades from Snoqualmie Pass northward. The region dries out with freezing levels rising to seasonal norms (2500-5000 ft) by the afternoon with more sunshine as the offshore ridge rebounds.

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
Sunday Partly cloudy to mostly sunny.
Sunday Night Partly cloudy with clouds increasing overnight.
Sunday Partly cloudy.
Sunday Night Partly cloudy.
Sunday Partly cloudy.
Sunday Night Partly cloudy.
Sunday Partly cloudy with some light snow showers early and periods of full sunshine during the afternoon.
Sunday Night Partly cloudy to mostly clear.
Sunday Partly cloudy with a few snow showers possible west of the Pass, early in the day. Decreasing light ridgeline and W wind at the Pass.
Sunday Night Partly cloudy. Light ridgeline and W or variable wind at the Pass.
Sunday Partly cloudy with a few snow showers possible west of the Pass, early in the day. Decreasing light to moderate ridgeline and light W wind at the Pass.
Sunday Night Partly cloudy. Light ridgeline and W or variable wind at the Pass.
Sunday Mostly sunny.
Sunday Night Mostly clear with high clouds increasing.
Sunday Mostly sunny.
Sunday Night Mostly clear with high clouds increasing.
Sunday Mostly sunny.
Sunday Night Mostly clear with high clouds increasing.
Sunday Mostly cloudy with snow showers tapering along the west slopes of Mt. Hood early in the day. Partly cloudy to mostly sunny on the eastern side. Decreasing moderate ridgeline winds.
Sunday Night Mostly clear with high clouds increasing.

Precipitation (in)

Sunday Sunday Night Monday
4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge 0 0 LT 0.10
Mt Baker Ski Area 0 0 LT 0.10
Mt. Loop - Barlow Pass 0 0 LT 0.10
Stevens Pass 0 0 0
Snoqualmie Pass 0 0 LT 0.10
Crystal Mt 0 0 0
Paradise LT 0.10 0 0
White Pass LT 0.10 0 0
Washington Pass 0 0 LT 0.10
Mission Ridge 0 0 0
Salmon la Sac - Gallagher Head 0 0 0
Tieton River - Darland Mt. 0 0 0
Mt Hood Meadows LT 0.10 0 0
Timberline LT 0.10 0 0
Hurricane Ridge Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
Mt Baker Ski Area Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
Mt. Loop - Barlow Pass Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
Stevens Pass Precipitation (in)
Sunday 0
Sunday Night 0
Monday 0
Snoqualmie Pass Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
Crystal Mt Precipitation (in)
Sunday 0
Sunday Night 0
Monday 0
Paradise Precipitation (in)
Sunday LT 0.10
Sunday Night 0
Monday 0
White Pass Precipitation (in)
Sunday LT 0.10
Sunday Night 0
Monday 0
Washington Pass Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
Mission Ridge Precipitation (in)
Sunday 0
Sunday Night 0
Monday 0
Salmon la Sac - Gallagher Head Precipitation (in)
Sunday 0
Sunday Night 0
Monday 0
Tieton River - Darland Mt. Precipitation (in)
Sunday 0
Sunday Night 0
Monday 0
Mt Hood Meadows Precipitation (in)
Sunday LT 0.10
Sunday Night 0
Monday 0
Timberline Precipitation (in)
Sunday LT 0.10
Sunday Night 0
Monday 0

Snow Level (ft)

Sunday Morning Sunday Afternoon Sunday Evening Sunday Night Monday Morning Monday Afternoon
Olympics 1500' 2500' 2500' 2500' 2500' 4000'
West North 1500' 2000' 1500' 1000' 1000' 2500'
West Central 1500' 2000' 1500' 1000' 1000' 2500'
West South 1500' 2500' 2000' 1000' 2000' 3500'
Stevens Pass 1500' 2000' 1500' 1000' 1000' 3000'
Snoqualmie Pass 1500' 2000' 1500' 1000' 1000' 3000'
East North 1000' 2500' 1500' 500' 1000' 3000'
East Central 1000' 2500' 1500' 1000' 1500' 3000'
East South 1500' 2500' 2000' 1500' 1500' 4500'
Mt. Hood 1500' 2500' 2500' 1500' 1500' 5000'
Olympics Elevation
Sunday Morning 1500'
Sunday Afternoon 2500'
Sunday Evening 2500'
Sunday Night 2500'
Monday Morning 2500'
Monday Afternoon 4000'
West North Elevation
Sunday Morning 1500'
Sunday Afternoon 2000'
Sunday Evening 1500'
Sunday Night 1000'
Monday Morning 1000'
Monday Afternoon 2500'
West Central Elevation
Sunday Morning 1500'
Sunday Afternoon 2000'
Sunday Evening 1500'
Sunday Night 1000'
Monday Morning 1000'
Monday Afternoon 2500'
West South Elevation
Sunday Morning 1500'
Sunday Afternoon 2500'
Sunday Evening 2000'
Sunday Night 1000'
Monday Morning 2000'
Monday Afternoon 3500'
Stevens Pass Elevation
Sunday Morning 1500'
Sunday Afternoon 2000'
Sunday Evening 1500'
Sunday Night 1000'
Monday Morning 1000'
Monday Afternoon 3000'
Snoqualmie Pass Elevation
Sunday Morning 1500'
Sunday Afternoon 2000'
Sunday Evening 1500'
Sunday Night 1000'
Monday Morning 1000'
Monday Afternoon 3000'
East North Elevation
Sunday Morning 1000'
Sunday Afternoon 2500'
Sunday Evening 1500'
Sunday Night 500'
Monday Morning 1000'
Monday Afternoon 3000'
East Central Elevation
Sunday Morning 1000'
Sunday Afternoon 2500'
Sunday Evening 1500'
Sunday Night 1000'
Monday Morning 1500'
Monday Afternoon 3000'
East South Elevation
Sunday Morning 1500'
Sunday Afternoon 2500'
Sunday Evening 2000'
Sunday Night 1500'
Monday Morning 1500'
Monday Afternoon 4500'
Mt. Hood Elevation
Sunday Morning 1500'
Sunday Afternoon 2500'
Sunday Evening 2500'
Sunday Night 1500'
Monday Morning 1500'
Monday Afternoon 5000'

5000' Temperatures (°F)

Sunday Sunday Night
Max / Min Max / Min
Olympics 27 / 21 29 / 22
West North 24 / 22 22 / 19
West Central 24 / 20 22 / 19
West South 24 / 22 24 / 19
Stevens Pass 24 / 22 23 / 19
Snoqualmie Pass 24 / 20 24 / 19
East North 25 / 19 24 / 19
East Central 25 / 23 26 / 19
East South 26 / 22 26 / 20
Mt. Hood 27 / 22 26 / 20
Olympics 5000' Temperature Forecast
(Max / Min)
Sunday 27 / 21
Sunday Night 29 / 22
West North 5000' Temperature Forecast
(Max / Min)
Sunday 24 / 22
Sunday Night 22 / 19
West Central 5000' Temperature Forecast
(Max / Min)
Sunday 24 / 20
Sunday Night 22 / 19
West South 5000' Temperature Forecast
(Max / Min)
Sunday 24 / 22
Sunday Night 24 / 19
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Sunday 24 / 22
Sunday Night 23 / 19
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Sunday 24 / 20
Sunday Night 24 / 19
East North 5000' Temperature Forecast
(Max / Min)
Sunday 25 / 19
Sunday Night 24 / 19
East Central 5000' Temperature Forecast
(Max / Min)
Sunday 25 / 23
Sunday Night 26 / 19
East South 5000' Temperature Forecast
(Max / Min)
Sunday 26 / 22
Sunday Night 26 / 20
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Sunday 27 / 22
Sunday Night 26 / 20

Ridgeline Winds (mph)

Sunday Morning Sunday Afternoon Sunday Evening Sunday Night
Olympics NW 5-15 WNW 0-10 WNW 0-10 W 5-15
West North WSW 0-10 SSW 0-10 SW 0-10 W 0-10
West Central WNW 5-15 WNW 5-15 NW 0-10 WNW 0-10
West South NW 5-15 NW 5-15 NNW 5-15 NW 5-15
Stevens Pass WNW 5-15 WNW 5-15 WNW 5-15 WNW 0-10
Snoqualmie Pass WNW 5-15 NW 10-20 NW 5-15 NW 5-15
East North NW 10-20 NW 10-20 NW 5-15 WNW 5-15
East Central NW 10-20 NW 5-15 NW 5-15 NW 5-15
East South NW 10-20 NW 5-15 NNW 5-15 NNW 0-10
Mt. Hood WNW 20-30 NW 10-20 NNW 10-20 NNW 10-20
Olympics Ridgeline Winds (mph)
Sunday Morning NW 5-15
Sunday Afternoon WNW 0-10
Sunday Evening WNW 0-10
Sunday Night W 5-15
West North Ridgeline Winds (mph)
Sunday Morning WSW 0-10
Sunday Afternoon SSW 0-10
Sunday Evening SW 0-10
Sunday Night W 0-10
West Central Ridgeline Winds (mph)
Sunday Morning WNW 5-15
Sunday Afternoon WNW 5-15
Sunday Evening NW 0-10
Sunday Night WNW 0-10
West South Ridgeline Winds (mph)
Sunday Morning NW 5-15
Sunday Afternoon NW 5-15
Sunday Evening NNW 5-15
Sunday Night NW 5-15
Stevens Pass Ridgeline Winds (mph)
Sunday Morning WNW 5-15
Sunday Afternoon WNW 5-15
Sunday Evening WNW 5-15
Sunday Night WNW 0-10
Snoqualmie Pass Ridgeline Winds (mph)
Sunday Morning WNW 5-15
Sunday Afternoon NW 10-20
Sunday Evening NW 5-15
Sunday Night NW 5-15
East North Ridgeline Winds (mph)
Sunday Morning NW 10-20
Sunday Afternoon NW 10-20
Sunday Evening NW 5-15
Sunday Night WNW 5-15
East Central Ridgeline Winds (mph)
Sunday Morning NW 10-20
Sunday Afternoon NW 5-15
Sunday Evening NW 5-15
Sunday Night NW 5-15
East South Ridgeline Winds (mph)
Sunday Morning NW 10-20
Sunday Afternoon NW 5-15
Sunday Evening NNW 5-15
Sunday Night NNW 0-10
Mt. Hood Ridgeline Winds (mph)
Sunday Morning WNW 20-30
Sunday Afternoon NW 10-20
Sunday Evening NNW 10-20
Sunday Night NNW 10-20

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

Previous forecast from Jan 21, 2023

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