Issued: 7:12 AM PST Monday, January 10, 2022
by Robert Hahn

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

Weather Synopsis

We're entering a very wet, atmospheric river type pattern with warm air streaming in on SW flow.

A front crossing western Washington with a band of precipitation weakens as it displaces the high pressure and moves into the Cascades from mid-morning onward. Significantly warmer temperatures are in place west of the Cascade Crest than further east. Paradise sits at 36F while Snoqualmie Pass remains in the lower 20s. E flow throughout the forecast period should maintain cool conditions through the mountain gaps. As precipitation moves into the Cascades, expect rain and high elevation snow west of the Cascade Crest with a rain/freezing rain mix through the passes and further east. Precipitation should be generally light, with freezing rain likely to have the greatest impact where it occurs.

The initial front moves out of the picture, giving the region a mostly dry evening. However, a stronger and wetter system tracks a low toward northern Vancouver Island and begins to impact Washington State Monday night with increasing SW winds and moderate rain and snow, particularly across the NW parts of the state.

A third wave of moisture arrives with another shortwave feature arriving ramping up rain, high elevation snow, and winds throughout the day on Tuesday. The location of the heaviest rain and snow remains uncertain, but will likely be in the central or northern Washington Cascades and Olympics.

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
Monday Decreasing light rain and snow. Strong ridgeline wind gusts possible in the morning.
Monday Night Increasing light rain and snow.
Monday Increasing light rain and snow.
Monday Night Light rain and snow becoming moderate to occasionally heavy overnight.
Monday Increasing light rain and snow.
Monday Night Light rain and snow becoming moderate overnight.
Monday Increasing light rain and snow.
Monday Night Mostly dry in the evening with increasing light rain and snow overnight (possibly moderate at Paradise).
Monday Light snow with lower elevation freezing rain developing during the mid-morning through afternoon hours. Light E winds at the Pass.
Monday Night Increasing light rain or freezing rain. Increasing light E winds at the Pass.
Monday Light snow with lower elevation freezing rain or rain developing during the mid-morning through afternoon hours. Light to moderate E winds at the Pass.
Monday Night Increasing light rain or freezing rain. Increasing light E winds at the Pass.
Monday Light snow developing from late morning onwards.
Monday Night Increasing light snow.
Monday Light snow or freezing rain from late morning onwards.
Monday Night Increasing very light snow or freezing rain.
Monday Light snow or freezing rain from late morning onwards.
Monday Night A mostly dry evening with light snow or freezing rain overnight.
Monday Increasing light rain or snow with some freezing fog possible.
Monday Night Very light rain or snow possible.

Precipitation (in)

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

Snow Level (ft)

Monday Morning* Monday Afternoon* Monday Evening* Monday Night* Tuesday Morning* Tuesday Afternoon*
Olympics 4500' 4500' 5500' 5500' 6000' 5500'
West North 3500' 3500' 4500' 5000' 4500' 5000'
West Central 3500' 4500' 4500' 5000' 5000' 5000'
West South 4500' 4500' 5500' 5000' 5500' 5500'
Stevens Pass 2000' 4000' 4000' 4000' 4000' 5000'
Snoqualmie Pass 2500' 4500' 5000' 4500' 5000' 5000'
East North 2000' 3500' 3500' 4000' 3000' 4000'
East Central 2000' 3500' 4000' 3500' 3000' 4500'
East South 3500' 4500' 5500' 5000' 5500' 5500'
Mt. Hood 3000' 5500' 6000' 6500' 6000' 6000'
Olympics Elevation
Monday Morning* 4500'
Monday Afternoon* 4500'
Monday Evening* 5500'
Monday Night* 5500'
Tuesday Morning* 6000'
Tuesday Afternoon* 5500'
West North Elevation
Monday Morning* 3500'
Monday Afternoon* 3500'
Monday Evening* 4500'
Monday Night* 5000'
Tuesday Morning* 4500'
Tuesday Afternoon* 5000'
West Central Elevation
Monday Morning* 3500'
Monday Afternoon* 4500'
Monday Evening* 4500'
Monday Night* 5000'
Tuesday Morning* 5000'
Tuesday Afternoon* 5000'
West South Elevation
Monday Morning* 4500'
Monday Afternoon* 4500'
Monday Evening* 5500'
Monday Night* 5000'
Tuesday Morning* 5500'
Tuesday Afternoon* 5500'
Stevens Pass Elevation
Monday Morning* 2000'
Monday Afternoon* 4000'
Monday Evening* 4000'
Monday Night* 4000'
Tuesday Morning* 4000'
Tuesday Afternoon* 5000'
Snoqualmie Pass Elevation
Monday Morning* 2500'
Monday Afternoon* 4500'
Monday Evening* 5000'
Monday Night* 4500'
Tuesday Morning* 5000'
Tuesday Afternoon* 5000'
East North Elevation
Monday Morning* 2000'
Monday Afternoon* 3500'
Monday Evening* 3500'
Monday Night* 4000'
Tuesday Morning* 3000'
Tuesday Afternoon* 4000'
East Central Elevation
Monday Morning* 2000'
Monday Afternoon* 3500'
Monday Evening* 4000'
Monday Night* 3500'
Tuesday Morning* 3000'
Tuesday Afternoon* 4500'
East South Elevation
Monday Morning* 3500'
Monday Afternoon* 4500'
Monday Evening* 5500'
Monday Night* 5000'
Tuesday Morning* 5500'
Tuesday Afternoon* 5500'
Mt. Hood Elevation
Monday Morning* 3000'
Monday Afternoon* 5500'
Monday Evening* 6000'
Monday Night* 6500'
Tuesday Morning* 6000'
Tuesday Afternoon* 6000'

5000' Temperatures (°F)

Monday Monday Night
Max / Min Max / Min
Olympics 33 / 30 35 / 33
West North 33 / 29 34 / 32
West Central 33 / 29 34 / 33
West South 33 / 28 35 / 32
Stevens Pass 33 / 22 33 / 32
Snoqualmie Pass 33 / 27 33 / 30
East North 32 / 17 32 / 28
East Central 33 / 18 33 / 29
East South 33 / 23 35 / 31
Mt. Hood 34 / 30 37 / 32
Olympics 5000' Temperature Forecast
(Max / Min)
Monday 33 / 30
Monday Night 35 / 33
West North 5000' Temperature Forecast
(Max / Min)
Monday 33 / 29
Monday Night 34 / 32
West Central 5000' Temperature Forecast
(Max / Min)
Monday 33 / 29
Monday Night 34 / 33
West South 5000' Temperature Forecast
(Max / Min)
Monday 33 / 28
Monday Night 35 / 32
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Monday 33 / 22
Monday Night 33 / 32
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Monday 33 / 27
Monday Night 33 / 30
East North 5000' Temperature Forecast
(Max / Min)
Monday 32 / 17
Monday Night 32 / 28
East Central 5000' Temperature Forecast
(Max / Min)
Monday 33 / 18
Monday Night 33 / 29
East South 5000' Temperature Forecast
(Max / Min)
Monday 33 / 23
Monday Night 35 / 31
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Monday 34 / 30
Monday Night 37 / 32

Ridgeline Winds (mph)

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

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

Previous forecast from Jan 9, 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