Issued: 7:06 AM PST Wednesday, January 12, 2022
by Robert Hahn

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

Weather Synopsis

A northward lifting warm front ends a multi-day atmospheric river event from south to north across Washington State on Wednesday. Heavy rain should taper off in the Paradise and Snoqualmie Pass areas by 10 AM; Stevens Pass area by noon; Mountain Loop area during the afternoon; and Mt. Baker area by the evening. Multiple days of mild WSW flow has raised snow levels across the region to 7500-8500 ft. The only holdouts will be deep, wind-sheltered valleys in the northeastern Cascades such as the Methow Valley where some cold air remains pooled. Washington Pass has changed over to rain or freezing rain. Moderate to strong ridgeline winds should continue for the east slopes of the Cascades and in areas more exposed to an increasing southerly component to the winds such as Hurricane Ridge and Mt. Baker.

The region should experience a mostly cloudy, but relatively dry and very mild evening. The low pressure associated with Wednesday's warm front should approach the mouth of the Columbia River overnight spreading periods of light rain back into the region in the early morning hours. The associated trough should bring in cooler air particularly for the southern Washington Cascades and Mt. Hood on Thursday. Snow levels should also drop to 4000-5500 ft by the afternoon with up to 0.5" of snow water equivalent for Mt. Hood and Paradise by the end of the day.

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
Wednesday Light to moderate rain tapering to showers in the afternoon. Strong ridgeline wind gusts possible.
Wednesday Night Increasing light rain. Strong ridgeline wind gusts possible after midnight.
Wednesday Heavy rain. Moderate to strong ridgeline winds.
Wednesday Night Light rain showers more likely after midnight. Strong wind gusts possible.
Wednesday Heavy rain decreasing tapering from south to north in the afternoon.
Wednesday Night Periods of light rain possible after midnight.
Wednesday Moderate rain at Paradise and light rain at White Pass and Crystal; mainly before 10 AM.
Wednesday Night Periods of light rain possible after midnight.
Wednesday Heavy rain tapering off in the afternoon. Light W wind switching E at pass by late morning.
Wednesday Night Cloudy with periods of light rain possible after midnight. Light E wind at the Pass.
Wednesday Heavy rain early in the day tapering quickly and ending around 10 AM. Light W wind switching E at pass by late morning.
Wednesday Night Cloudy with light rain possible after midnight. Light E wind at the Pass.
Wednesday Light rain or freezing rain. Strong ridgeline wind gusts likely in the afternoon.
Wednesday Night Very light rain possible at times.
Wednesday Moderate rain in the morning western part, with light rain or freezing rain further east. Mostly cloudy during the afternoon. Decreasing moderate to strong ridgeline winds.
Wednesday Night Mostly cloudy with light rain possible after midnight.
Wednesday Light rain ending early, then becoming mostly cloudy. Strong ridgeline wind gusts possible in the morning.
Wednesday Night Mostly cloudy with periods of light rain possible after midnight.
Wednesday Partly to mostly cloudy. Strong ridgeline wind gusts at times.
Wednesday Night Mostly cloudy with periods of light rain possible after midnight.

Precipitation (in)

Wednesday Wednesday Night Thursday
4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge 0.25 - 0.50 LT 0.25 LT 0.10
Mt Baker Ski Area 1.00 LT 0.10 LT 0.25
Mt. Loop - Barlow Pass 1.00 LT 0.10 LT 0.25
Stevens Pass 0.50 - 0.75 0 LT 0.25
Snoqualmie Pass 0.50 LT 0.10 0.25
Crystal Mt LT 0.10 LT 0.10 LT 0.25
Paradise 0.25 - 0.50 LT 0.10 0.25 - 0.50
White Pass LT 0.10 LT 0.10 0.25
Washington Pass 0.25 LT 0.10 LT 0.10
Mission Ridge LT 0.10 0 LT 0.10
Salmon la Sac - Gallagher Head 0.25 - 0.50 LT 0.10 LT 0.25
Tieton River - Darland Mt. LT 0.10 LT 0.10 0.25
Mt Hood Meadows 0 LT 0.10 0.25 - 0.50
Timberline 0 LT 0.10 0.25 - 0.50
Hurricane Ridge Precipitation (in)
Wednesday 0.25 - 0.50
Wednesday Night LT 0.25
Thursday LT 0.10
Mt Baker Ski Area Precipitation (in)
Wednesday 1.00
Wednesday Night LT 0.10
Thursday LT 0.25
Mt. Loop - Barlow Pass Precipitation (in)
Wednesday 1.00
Wednesday Night LT 0.10
Thursday LT 0.25
Stevens Pass Precipitation (in)
Wednesday 0.50 - 0.75
Wednesday Night 0
Thursday LT 0.25
Snoqualmie Pass Precipitation (in)
Wednesday 0.50
Wednesday Night LT 0.10
Thursday 0.25
Crystal Mt Precipitation (in)
Wednesday LT 0.10
Wednesday Night LT 0.10
Thursday LT 0.25
Paradise Precipitation (in)
Wednesday 0.25 - 0.50
Wednesday Night LT 0.10
Thursday 0.25 - 0.50
White Pass Precipitation (in)
Wednesday LT 0.10
Wednesday Night LT 0.10
Thursday 0.25
Washington Pass Precipitation (in)
Wednesday 0.25
Wednesday Night LT 0.10
Thursday LT 0.10
Mission Ridge Precipitation (in)
Wednesday LT 0.10
Wednesday Night 0
Thursday LT 0.10
Salmon la Sac - Gallagher Head Precipitation (in)
Wednesday 0.25 - 0.50
Wednesday Night LT 0.10
Thursday LT 0.25
Tieton River - Darland Mt. Precipitation (in)
Wednesday LT 0.10
Wednesday Night LT 0.10
Thursday 0.25
Mt Hood Meadows Precipitation (in)
Wednesday 0
Wednesday Night LT 0.10
Thursday 0.25 - 0.50
Timberline Precipitation (in)
Wednesday 0
Wednesday Night LT 0.10
Thursday 0.25 - 0.50

Snow Level (ft)

Wednesday Morning Wednesday Afternoon* Wednesday Evening* Wednesday Night* Thursday Morning* Thursday Afternoon*
Olympics 8000' 8000' 7500' 7000' 5500' 5500'
West North 7000' 7500' 7500' 7000' 5500' 5500'
West Central 7500' 7500' 8000' 7500' 6000' 5000'
West South 8000' 8500' 8500' 7000' 5000' 4500'
Stevens Pass 7500' 8000' 8500' 6500' 5000' 5000'
Snoqualmie Pass 8000' 8000' 8500' 7000' 5000' 4500'
East North 6500' 7500' 8000' 7500' 5000' 5500'
East Central 8000' 8000' 9000' 6500' 5000' 5000'
East South 8500' 9500' 9000' 6000' 5500' 4500'
Mt. Hood 10000' 11000' 10500' 8000' 6000' 4000'
Olympics Elevation
Wednesday Morning 8000'
Wednesday Afternoon* 8000'
Wednesday Evening* 7500'
Wednesday Night* 7000'
Thursday Morning* 5500'
Thursday Afternoon* 5500'
West North Elevation
Wednesday Morning 7000'
Wednesday Afternoon* 7500'
Wednesday Evening* 7500'
Wednesday Night* 7000'
Thursday Morning* 5500'
Thursday Afternoon* 5500'
West Central Elevation
Wednesday Morning 7500'
Wednesday Afternoon* 7500'
Wednesday Evening* 8000'
Wednesday Night* 7500'
Thursday Morning* 6000'
Thursday Afternoon* 5000'
West South Elevation
Wednesday Morning 8000'
Wednesday Afternoon* 8500'
Wednesday Evening* 8500'
Wednesday Night* 7000'
Thursday Morning* 5000'
Thursday Afternoon* 4500'
Stevens Pass Elevation
Wednesday Morning 7500'
Wednesday Afternoon* 8000'
Wednesday Evening* 8500'
Wednesday Night* 6500'
Thursday Morning* 5000'
Thursday Afternoon* 5000'
Snoqualmie Pass Elevation
Wednesday Morning 8000'
Wednesday Afternoon* 8000'
Wednesday Evening* 8500'
Wednesday Night* 7000'
Thursday Morning* 5000'
Thursday Afternoon* 4500'
East North Elevation
Wednesday Morning 6500'
Wednesday Afternoon* 7500'
Wednesday Evening* 8000'
Wednesday Night* 7500'
Thursday Morning* 5000'
Thursday Afternoon* 5500'
East Central Elevation
Wednesday Morning 8000'
Wednesday Afternoon* 8000'
Wednesday Evening* 9000'
Wednesday Night* 6500'
Thursday Morning* 5000'
Thursday Afternoon* 5000'
East South Elevation
Wednesday Morning 8500'
Wednesday Afternoon* 9500'
Wednesday Evening* 9000'
Wednesday Night* 6000'
Thursday Morning* 5500'
Thursday Afternoon* 4500'
Mt. Hood Elevation
Wednesday Morning 10000'
Wednesday Afternoon* 11000'
Wednesday Evening* 10500'
Wednesday Night* 8000'
Thursday Morning* 6000'
Thursday Afternoon* 4000'

5000' Temperatures (°F)

Wednesday Wednesday Night
Max / Min Max / Min
Olympics 39 / 37 37 / 34
West North 38 / 36 37 / 33
West Central 38 / 36 37 / 30
West South 39 / 37 36 / 33
Stevens Pass 39 / 37 36 / 30
Snoqualmie Pass 39 / 38 37 / 28
East North 38 / 37 38 / 28
East Central 39 / 38 38 / 29
East South 40 / 37 40 / 32
Mt. Hood 42 / 38 41 / 34
Olympics 5000' Temperature Forecast
(Max / Min)
Wednesday 39 / 37
Wednesday Night 37 / 34
West North 5000' Temperature Forecast
(Max / Min)
Wednesday 38 / 36
Wednesday Night 37 / 33
West Central 5000' Temperature Forecast
(Max / Min)
Wednesday 38 / 36
Wednesday Night 37 / 30
West South 5000' Temperature Forecast
(Max / Min)
Wednesday 39 / 37
Wednesday Night 36 / 33
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Wednesday 39 / 37
Wednesday Night 36 / 30
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Wednesday 39 / 38
Wednesday Night 37 / 28
East North 5000' Temperature Forecast
(Max / Min)
Wednesday 38 / 37
Wednesday Night 38 / 28
East Central 5000' Temperature Forecast
(Max / Min)
Wednesday 39 / 38
Wednesday Night 38 / 29
East South 5000' Temperature Forecast
(Max / Min)
Wednesday 40 / 37
Wednesday Night 40 / 32
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Wednesday 42 / 38
Wednesday Night 41 / 34

Ridgeline Winds (mph)

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

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

Previous forecast from Jan 11, 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