Issued: 6:52 AM PST Saturday, January 9, 2021
by Dallas Glass

Jump to: Weather Forecast I Snow Level I Precipitation I Ridgeline Winds I

Weather Synopsis

The mountains will enjoy a dry break between storm systems today ahead of our next round of precipitation. General calm winds this morning in most locations will quickly increase as the next system begins to approach the Northwest. You may find gusty conditions and the strongest winds near the Passes, along the Cascade Crest, and in the Wenatchee Mountains. High thin clouds should continue to increase and thicken, especially in the afternoon, providing most locations with filtered sunshine. Low clouds and fog could persist in the mountain valleys east of the Cascades throughout the day and may creep into the Passes as easterly flow ramps up. 

A weakening frontal system will move inland overnight bringing rain and snow showers to the mountains. Precipitation should begin first in the Olympics and at Mt Baker before spreading to other locations after midnight. This isn't a particularly impressive storm and what little precipitation there is focuses west of the Cascade Crest with only a few stray showers venturing further east. Expect windy conditions in all areas as the front moves through overnight. Showers should linger into Sunday morning before we begin to dry out. Locations further south and east could even see some sunshine by Sunday afternoon. 

Weather Forecast

Use dropdown to select your zone
Saturday Clouds and winds increasing throughout the day. Strong S winds in the afternoon.
Saturday Night Rain and snow showers. Strong SW winds.

Precipitation (in)

Saturday Saturday Night Sunday
4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge 0 LT 0.25 LT 0.10
Mt Baker Ski Area 0 0.25 0.25
Mt. Loop - Barlow Pass 0 LT 0.10 0.25
Stevens Pass 0 LT 0.10 LT 0.25
Snoqualmie Pass 0 LT 0.10 LT 0.25
Crystal Mt 0 LT 0.10 LT 0.10
Paradise 0 LT 0.25 LT 0.25
White Pass 0 LT 0.10 LT 0.10
Washington Pass 0 LT 0.10 LT 0.10
Mission Ridge 0 LT 0.10 LT 0.10
Salmon la Sac - Gallagher Head 0 LT 0.10 LT 0.10
Tieton River - Darland Mt. 0 LT 0.10 LT 0.10
Mt Hood Meadows 0 LT 0.25 LT 0.10
Timberline 0 LT 0.25 LT 0.10
Hurricane Ridge Precipitation (in)
Saturday 0
Saturday Night LT 0.25
Sunday LT 0.10
Mt Baker Ski Area Precipitation (in)
Saturday 0
Saturday Night 0.25
Sunday 0.25
Mt. Loop - Barlow Pass Precipitation (in)
Saturday 0
Saturday Night LT 0.10
Sunday 0.25
Stevens Pass Precipitation (in)
Saturday 0
Saturday Night LT 0.10
Sunday LT 0.25
Snoqualmie Pass Precipitation (in)
Saturday 0
Saturday Night LT 0.10
Sunday LT 0.25
Crystal Mt Precipitation (in)
Saturday 0
Saturday Night LT 0.10
Sunday LT 0.10
Paradise Precipitation (in)
Saturday 0
Saturday Night LT 0.25
Sunday LT 0.25
White Pass Precipitation (in)
Saturday 0
Saturday Night LT 0.10
Sunday LT 0.10
Washington Pass Precipitation (in)
Saturday 0
Saturday Night LT 0.10
Sunday LT 0.10
Mission Ridge Precipitation (in)
Saturday 0
Saturday Night LT 0.10
Sunday LT 0.10
Salmon la Sac - Gallagher Head Precipitation (in)
Saturday 0
Saturday Night LT 0.10
Sunday LT 0.10
Tieton River - Darland Mt. Precipitation (in)
Saturday 0
Saturday Night LT 0.10
Sunday LT 0.10
Mt Hood Meadows Precipitation (in)
Saturday 0
Saturday Night LT 0.25
Sunday LT 0.10
Timberline Precipitation (in)
Saturday 0
Saturday Night LT 0.25
Sunday LT 0.10

Snow Level (ft)

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

5000' Temperatures (°F)

Saturday Saturday Night
Max / Min Max / Min
Olympics 33 / 22 32 / 25
West North 31 / 20 30 / 26
West Central 28 / 21 28 / 25
West South 32 / 22 34 / 30
Stevens Pass 26 / 19 25 / 21
Snoqualmie Pass 25 / 19 26 / 23
East North 23 / 17 21 / 19
East Central 25 / 19 24 / 21
East South 28 / 18 26 / 23
Mt. Hood 34 / 21 31 / 28
Olympics 5000' Temperature Forecast
(Max / Min)
Saturday 4am - 4pm 33 / 22
Saturday 4pm - 4am 32 / 25
West North 5000' Temperature Forecast
(Max / Min)
Saturday 4am - 4pm 31 / 20
Saturday 4pm - 4am 30 / 26
West Central 5000' Temperature Forecast
(Max / Min)
Saturday 4am - 4pm 28 / 21
Saturday 4pm - 4am 28 / 25
West South 5000' Temperature Forecast
(Max / Min)
Saturday 4am - 4pm 32 / 22
Saturday 4pm - 4am 34 / 30
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Saturday 4am - 4pm 26 / 19
Saturday 4pm - 4am 25 / 21
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Saturday 4am - 4pm 25 / 19
Saturday 4pm - 4am 26 / 23
East North 5000' Temperature Forecast
(Max / Min)
Saturday 4am - 4pm 23 / 17
Saturday 4pm - 4am 21 / 19
East Central 5000' Temperature Forecast
(Max / Min)
Saturday 4am - 4pm 25 / 19
Saturday 4pm - 4am 24 / 21
East South 5000' Temperature Forecast
(Max / Min)
Saturday 4am - 4pm 28 / 18
Saturday 4pm - 4am 26 / 23
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Saturday 4am - 4pm 34 / 21
Saturday 4pm - 4am 31 / 28

Ridgeline Winds (mph)

Saturday Morning Saturday Afternoon Saturday Evening Saturday Night
Olympics S 10-20 S 20-30 SW 25-35 SW 15-25
West North S 10-20 S 20-30 S 30-40 S 20-30
West Central S 5-15 S 10-20 S 15-25 SSW 10-20
West South S 10-20 S 15-25 S 15-25 SSW 15-25
Stevens Pass SE 5-15 SE 15-25 SE 5-15 S 5-15
Snoqualmie Pass E 15-25 SE 20-30 SE 15-25 SW 5-15
East North SE 10-20 SE 10-20 S 10-20 SW 20-30
East Central S 10-20 SSW 15-25 SW 15-25 SW 20-30
East South S 10-20 SSW 10-20 SW 15-25 SSW 15-25
Mt. Hood S 10-20 S 15-25 SW 20-30 SW 20-30
Olympics Ridgeline Winds (mph)
Saturday Morning S 10-20
Saturday Afternoon S 20-30
Saturday Evening SW 25-35
Saturday Night SW 15-25
West North Ridgeline Winds (mph)
Saturday Morning S 10-20
Saturday Afternoon S 20-30
Saturday Evening S 30-40
Saturday Night S 20-30
West Central Ridgeline Winds (mph)
Saturday Morning S 5-15
Saturday Afternoon S 10-20
Saturday Evening S 15-25
Saturday Night SSW 10-20
West South Ridgeline Winds (mph)
Saturday Morning S 10-20
Saturday Afternoon S 15-25
Saturday Evening S 15-25
Saturday Night SSW 15-25
Stevens Pass Ridgeline Winds (mph)
Saturday Morning SE 5-15
Saturday Afternoon SE 15-25
Saturday Evening SE 5-15
Saturday Night S 5-15
Snoqualmie Pass Ridgeline Winds (mph)
Saturday Morning E 15-25
Saturday Afternoon SE 20-30
Saturday Evening SE 15-25
Saturday Night SW 5-15
East North Ridgeline Winds (mph)
Saturday Morning SE 10-20
Saturday Afternoon SE 10-20
Saturday Evening S 10-20
Saturday Night SW 20-30
East Central Ridgeline Winds (mph)
Saturday Morning S 10-20
Saturday Afternoon SSW 15-25
Saturday Evening SW 15-25
Saturday Night SW 20-30
East South Ridgeline Winds (mph)
Saturday Morning S 10-20
Saturday Afternoon SSW 10-20
Saturday Evening SW 15-25
Saturday Night SSW 15-25
Mt. Hood Ridgeline Winds (mph)
Saturday Morning S 10-20
Saturday Afternoon S 15-25
Saturday Evening SW 20-30
Saturday Night SW 20-30

Jump to: Weather Forecast I Snow Level I Precipitation I Ridgeline Winds I

Previous forecast from Jan 8, 2021

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’.