Issued: 7:13 AM PST Tuesday, January 11, 2022
by Robert Hahn

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

Weather Synopsis

An atmospheric river continues to bring unseasonably warm air and heavy precipitation into the region. The first wave of moisture arrived Monday night with a front lingering over the region and maintaining heavy rain and upper elevation snow across the central Washington Cascades. Precipitation should increase across the Washington Cascades and lifts slightly northward through the afternoon as the next wave of moisture arrives with a low tracking just north of Vancouver Island by Monday evening. Lingering cold air pooled east of the Cascade Crest should continue to spill through the Cascade mountain gaps and will be cold enough to create freezing rain in places like Snoqualmie Pass through the morning hours. As the milder air and moderate SW winds continue to scour out the shallow cold air pool, freezing rain will increasingly become relegated to deep, cold valley locations and the Methow Valley. Precipitation should continue to be most intense for Snoqualmie Pass northward to highway 20 overnight. Washington Pass should see a changeover to all rain at the upper station after midnight.

On Wednesday, a stronger low well offshore lifts the deluge northward as a warm front moves into Canada, cutting off precipitation from south to north. This leaves our region cloudy and drier, but still very mild.

Ridgeline winds peak Tuesday evening and will be strong along parts of the east slopes of the Cascades. Rising snow levels should reach 7000-9000 ft by Wednesday.

 

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
Tuesday Light rain and highest elevation snow becoming moderate in the afternoon.
Tuesday Night Moderate rain becoming light to moderate overnight.
Tuesday Light rain and high elevation snow becoming moderate in the afternoon.
Tuesday Night Moderate rain and highest elevation snow decreasing overnight.
Tuesday Heavy rain and high elevation snow.
Tuesday Night Heavy rain and highest elevation snow.
Tuesday Moderate to heavy rain and high elevation snow; light to moderate at Crystal and Paradise.
Tuesday Night Heavy rain and high elevation snow; light to moderate at Crystal and Paradise.
Tuesday Heavy rain and high elevation snow, possibly mixing freezing rain at times at the Pass. Light E winds at the Pass.
Tuesday Night Heavy rain and highest elevation snow. Variable and generally light winds at the Pass.
Tuesday Heavy rain and high elevation snow. Freezing rain likely at Pass level through the morning hours. Light E winds at the Pass.
Tuesday Night Heavy rain and highest elevation snow. Variable and generally light winds at the Pass.
Tuesday Moderate snow.
Tuesday Night Moderate snow mixing with rain or freezing rain at lower elevations and becoming light overnight.
Tuesday Moderate to heavy rain and snow western part. Light rain and snow further east. Freezing rain likely in colder valley locations. Strong ridgeline wind gusts.
Tuesday Night Moderate to heavy rain and snow western part. Light rain and snow further east. Strong ridgeline winds.
Tuesday Increasing light rain and highest elevation snow. Freezing rain possible in valley locations.
Tuesday Night Decreasing light rain.
Tuesday Light rain and high elevation snow. Strong ridgeline wind gusts.
Tuesday Night Light rain and highest elevation snow. Strong ridgeline wind gusts.

Precipitation (in)

Tuesday Tuesday Night Wednesday
4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge 0.50 0.50 - 0.75 0.25 - 0.50
Mt Baker Ski Area 0.50 1.00 0.75 -1.00
Mt. Loop - Barlow Pass 2.00 2.00 0.75
Stevens Pass 1.00 - 1.50 1.00 - 1.50 0.50
Snoqualmie Pass 1.00 - 1.50 1.00 0.25 - 0.50
Crystal Mt 0.25 - 0.50 0.25 LT 0.10
Paradise 1.00 - 1.50 1.50 0.25 - 0.50
White Pass 0.50 0.25 - 0.50 LT 0.10
Washington Pass 0.50 - 0.75 0.75 0.25 - 0.50
Mission Ridge LT 0.25 LT 0.25 LT 0.10
Salmon la Sac - Gallagher Head 0.75 -1.00 0.75 -1.00 0.25 - 0.50
Tieton River - Darland Mt. 0.25 - 0.50 0.25 LT 0.10
Mt Hood Meadows LT 0.25 LT 0.10 0
Timberline LT 0.25 LT 0.10 0
Hurricane Ridge Precipitation (in)
Tuesday 0.50
Tuesday Night 0.50 - 0.75
Wednesday 0.25 - 0.50
Mt Baker Ski Area Precipitation (in)
Tuesday 0.50
Tuesday Night 1.00
Wednesday 0.75 -1.00
Mt. Loop - Barlow Pass Precipitation (in)
Tuesday 2.00
Tuesday Night 2.00
Wednesday 0.75
Stevens Pass Precipitation (in)
Tuesday 1.00 - 1.50
Tuesday Night 1.00 - 1.50
Wednesday 0.50
Snoqualmie Pass Precipitation (in)
Tuesday 1.00 - 1.50
Tuesday Night 1.00
Wednesday 0.25 - 0.50
Crystal Mt Precipitation (in)
Tuesday 0.25 - 0.50
Tuesday Night 0.25
Wednesday LT 0.10
Paradise Precipitation (in)
Tuesday 1.00 - 1.50
Tuesday Night 1.50
Wednesday 0.25 - 0.50
White Pass Precipitation (in)
Tuesday 0.50
Tuesday Night 0.25 - 0.50
Wednesday LT 0.10
Washington Pass Precipitation (in)
Tuesday 0.50 - 0.75
Tuesday Night 0.75
Wednesday 0.25 - 0.50
Mission Ridge Precipitation (in)
Tuesday LT 0.25
Tuesday Night LT 0.25
Wednesday LT 0.10
Salmon la Sac - Gallagher Head Precipitation (in)
Tuesday 0.75 -1.00
Tuesday Night 0.75 -1.00
Wednesday 0.25 - 0.50
Tieton River - Darland Mt. Precipitation (in)
Tuesday 0.25 - 0.50
Tuesday Night 0.25
Wednesday LT 0.10
Mt Hood Meadows Precipitation (in)
Tuesday LT 0.25
Tuesday Night LT 0.10
Wednesday 0
Timberline Precipitation (in)
Tuesday LT 0.25
Tuesday Night LT 0.10
Wednesday 0

Snow Level (ft)

Tuesday Morning* Tuesday Afternoon* Tuesday Evening Tuesday Night Wednesday Morning Wednesday Afternoon*
Olympics 6500' 6000' 7000' 8500' 8000' 8000'
West North 5500' 5500' 5000' 6000' 6500' 7000'
West Central 5500' 5500' 6000' 6500' 7500' 7500'
West South 5500' 5500' 6500' 8000' 8000' 8000'
Stevens Pass 5000' 5500' 6000' 6500' 7500' 7500'
Snoqualmie Pass 5500' 5500' 6500' 7500' 8000' 7500'
East North 3500' 4000' 5000' 5500' 6000' 6500'
East Central 5000' 5500' 6500' 7000' 8000' 7500'
East South 6000' 6000' 7000' 8500' 8500' 8500'
Mt. Hood 6500' 6500' 7500' 9000' 9500' 9500'
Olympics Elevation
Tuesday Morning* 6500'
Tuesday Afternoon* 6000'
Tuesday Evening 7000'
Tuesday Night 8500'
Wednesday Morning 8000'
Wednesday Afternoon* 8000'
West North Elevation
Tuesday Morning* 5500'
Tuesday Afternoon* 5500'
Tuesday Evening 5000'
Tuesday Night 6000'
Wednesday Morning 6500'
Wednesday Afternoon* 7000'
West Central Elevation
Tuesday Morning* 5500'
Tuesday Afternoon* 5500'
Tuesday Evening 6000'
Tuesday Night 6500'
Wednesday Morning 7500'
Wednesday Afternoon* 7500'
West South Elevation
Tuesday Morning* 5500'
Tuesday Afternoon* 5500'
Tuesday Evening 6500'
Tuesday Night 8000'
Wednesday Morning 8000'
Wednesday Afternoon* 8000'
Stevens Pass Elevation
Tuesday Morning* 5000'
Tuesday Afternoon* 5500'
Tuesday Evening 6000'
Tuesday Night 6500'
Wednesday Morning 7500'
Wednesday Afternoon* 7500'
Snoqualmie Pass Elevation
Tuesday Morning* 5500'
Tuesday Afternoon* 5500'
Tuesday Evening 6500'
Tuesday Night 7500'
Wednesday Morning 8000'
Wednesday Afternoon* 7500'
East North Elevation
Tuesday Morning* 3500'
Tuesday Afternoon* 4000'
Tuesday Evening 5000'
Tuesday Night 5500'
Wednesday Morning 6000'
Wednesday Afternoon* 6500'
East Central Elevation
Tuesday Morning* 5000'
Tuesday Afternoon* 5500'
Tuesday Evening 6500'
Tuesday Night 7000'
Wednesday Morning 8000'
Wednesday Afternoon* 7500'
East South Elevation
Tuesday Morning* 6000'
Tuesday Afternoon* 6000'
Tuesday Evening 7000'
Tuesday Night 8500'
Wednesday Morning 8500'
Wednesday Afternoon* 8500'
Mt. Hood Elevation
Tuesday Morning* 6500'
Tuesday Afternoon* 6500'
Tuesday Evening 7500'
Tuesday Night 9000'
Wednesday Morning 9500'
Wednesday Afternoon* 9500'

5000' Temperatures (°F)

Tuesday Tuesday Night
Max / Min Max / Min
Olympics 36 / 33 36 / 35
West North 35 / 32 36 / 33
West Central 35 / 34 36 / 35
West South 35 / 34 38 / 36
Stevens Pass 35 / 34 38 / 36
Snoqualmie Pass 35 / 33 38 / 35
East North 35 / 31 37 / 31
East Central 35 / 33 37 / 35
East South 35 / 34 37 / 36
Mt. Hood 36 / 34 38 / 33
Olympics 5000' Temperature Forecast
(Max / Min)
Tuesday 36 / 33
Tuesday Night 36 / 35
West North 5000' Temperature Forecast
(Max / Min)
Tuesday 35 / 32
Tuesday Night 36 / 33
West Central 5000' Temperature Forecast
(Max / Min)
Tuesday 35 / 34
Tuesday Night 36 / 35
West South 5000' Temperature Forecast
(Max / Min)
Tuesday 35 / 34
Tuesday Night 38 / 36
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Tuesday 35 / 34
Tuesday Night 38 / 36
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Tuesday 35 / 33
Tuesday Night 38 / 35
East North 5000' Temperature Forecast
(Max / Min)
Tuesday 35 / 31
Tuesday Night 37 / 31
East Central 5000' Temperature Forecast
(Max / Min)
Tuesday 35 / 33
Tuesday Night 37 / 35
East South 5000' Temperature Forecast
(Max / Min)
Tuesday 35 / 34
Tuesday Night 37 / 36
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Tuesday 36 / 34
Tuesday Night 38 / 33

Ridgeline Winds (mph)

Tuesday Morning Tuesday Afternoon Tuesday Evening Tuesday Night
Olympics SW 10-20 SSW 20-30 SW 20-30 SW 15-25
West North SSW 20-30 SSW 10-20 SSW 20-30 SSW 15-25
West Central SW 20-30 SW 15-25 SW 25-35 SW 20-30
West South SW 20-30 SW 20-30 SW 25-35 SW 25-35
Stevens Pass SW 15-25 SW 15-25 WSW 20-30 WSW 20-30
Snoqualmie Pass SW 15-25 SW 15-25 SW 15-25 W 15-25
East North WSW 20-30 SW 10-20 SW 20-30 WSW 15-25
East Central WSW 25-35 WSW 20-30 WSW 30-40 WSW 30-40
East South WSW 20-30 WSW 25-35 WSW 25-35 WSW 25-35
Mt. Hood SW 15-25 WSW 20-30 WSW 20-30 WSW 15-25
Olympics Ridgeline Winds (mph)
Tuesday Morning SW 10-20
Tuesday Afternoon SSW 20-30
Tuesday Evening SW 20-30
Tuesday Night SW 15-25
West North Ridgeline Winds (mph)
Tuesday Morning SSW 20-30
Tuesday Afternoon SSW 10-20
Tuesday Evening SSW 20-30
Tuesday Night SSW 15-25
West Central Ridgeline Winds (mph)
Tuesday Morning SW 20-30
Tuesday Afternoon SW 15-25
Tuesday Evening SW 25-35
Tuesday Night SW 20-30
West South Ridgeline Winds (mph)
Tuesday Morning SW 20-30
Tuesday Afternoon SW 20-30
Tuesday Evening SW 25-35
Tuesday Night SW 25-35
Stevens Pass Ridgeline Winds (mph)
Tuesday Morning SW 15-25
Tuesday Afternoon SW 15-25
Tuesday Evening WSW 20-30
Tuesday Night WSW 20-30
Snoqualmie Pass Ridgeline Winds (mph)
Tuesday Morning SW 15-25
Tuesday Afternoon SW 15-25
Tuesday Evening SW 15-25
Tuesday Night W 15-25
East North Ridgeline Winds (mph)
Tuesday Morning WSW 20-30
Tuesday Afternoon SW 10-20
Tuesday Evening SW 20-30
Tuesday Night WSW 15-25
East Central Ridgeline Winds (mph)
Tuesday Morning WSW 25-35
Tuesday Afternoon WSW 20-30
Tuesday Evening WSW 30-40
Tuesday Night WSW 30-40
East South Ridgeline Winds (mph)
Tuesday Morning WSW 20-30
Tuesday Afternoon WSW 25-35
Tuesday Evening WSW 25-35
Tuesday Night WSW 25-35
Mt. Hood Ridgeline Winds (mph)
Tuesday Morning SW 15-25
Tuesday Afternoon WSW 20-30
Tuesday Evening WSW 20-30
Tuesday Night WSW 15-25

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

Previous forecast from Jan 10, 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