Issued: 7:09 AM PST Thursday, January 20, 2022
by Robert Hahn

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

Weather Synopsis

A wet system continues to impact the region on Thursday. A warm front lifted north of the Canadian Border Wednesday night with a well-defined cold front moving across the Puget Sound area at 7 AM Thursday morning. The front should pass the Cascades by around 9 AM. Heavy rain ahead of the cold front should decrease behind the front as rain/snow, snow showers, and convergence develop. Temperatures should also drop significantly behind the front. Models continue to indicate a high likelihood that convergence will set up around Stevens Pass during the afternoon hours with up to 6" of snow possible with 1-2" per hour rates. Other areas may see some enhanced snowfall during the evening hours as subtle shortwave results in a brief period of more widespread light to moderate rain snow and a southward shift of the convergence toward Snoqualmie Pass. Snow levels should drop to Snoqualmie Pass level around dusk.

NW flow begins to dry the region out as snow showers taper later Thursday night. Friday should be dry with a cool-ish start with an inversion forming as a ridge of high pressure begins to build into the region. Temperatures warm significantly across the region in the afternoon. Temperatures will be above normal for January across the region.

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
Thursday Decreasing light rain showers gradually changing to snow showers with a period of enhanced rain/snow possible late in the day.
Thursday Night Light rain and snow showers possible during the evening, then becoming partly cloudy.
Thursday Heavy rain and snow tapering to showers by the afternoon. Strong ridgeline wind gusts.
Thursday Night Light rain and snow showers ending by midnight. Becoming mostly cloudhy.
Thursday Heavy rain and high elevation snow tapering to light to moderate showers and convergence by the afternoon as snow levels lower. Strong ridgeline wind gusts.
Thursday Night Light to moderate rain/snow and convergence during the evening, then tapering light snow showers overnight.
Thursday Heavy (Paradise), moderate (White Pass), and light (Crystal) rain and snow in the morning with tapering showers in the afternoon. Strong ridgeline winds at times.
Thursday Night Decreasing light rain and snow showers.
Thursday Heavy rain and high elevation snow tapering to light to moderate showers and convergence by the afternoon as snow levels lower. Strong ridgeline wind gusts.
Thursday Night Light to moderate rain/snow and convergence during the evening, then tapering light snow showers overnight.
Thursday Heavy rain and high elevation snow tapering to light to occasionally moderate showers by the afternoon as snow levels lower. Strong ridgeline wind gusts.
Thursday Night Light to moderate rain/snow and convergence during the evening, then tapering light snow showers overnight.
Thursday Moderate rain and snow in the morning tapering to light showers by the afternoon.
Thursday Night Mostly cloudy.
Thursday Moderate rain and high elevation snow in the morning tapering to light showers. Freezing rain may linger in colder valleys during the morning hours. Strong ridgeline winds.
Thursday Night Light rain/snow and convergence spillover mainly near the Cascade Crest. Strong ridgeline winds through the evening hours.
Thursday Light to moderate rain and high elevation snow peaking during the morning, then tapering to showers. Moderate to strong ridgeline winds.
Thursday Night Very light snow showers in the early evening giving way to mostly cloudy skies.
Thursday Heavy rain and high elevation snow tapering to light to moderate as snow levels lower in the afternoon. Moderate to strong ridgeline winds.
Thursday Night Decreasing light rain and snow showers. Strong ridgeline wind gusts in the evening.

Precipitation (in)

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

Snow Level (ft)

Thursday Morning Thursday Afternoon Thursday Evening Thursday Night Friday Morning Friday Afternoon
Olympics 6000' 4500' 3000' 3500' 5000' 8500'
West North 5000' 4500' 2500' 2500' 3000' 3500'
West Central 6000' 5000' 3000' 2500' 3000' 3500'
West South 6500' 5000' 3000' 2500' 3000' 5000'
Stevens Pass 6000' 5000' 3000' 2500' 3000' 4000'
Snoqualmie Pass 6500' 5000' 3000' 3000' 3000' 4000'
East North 5000' 4500' 2500' 3000' 3500' 4000'
East Central 6500' 5000' 3500' 2500' 3500' 4500'
East South 7500' 5500' 3500' 3500' 3500' 5500'
Mt. Hood 7500' 5500' 4000' 3500' 3500' 6000'
Olympics Elevation
Thursday Morning 6000'
Thursday Afternoon 4500'
Thursday Evening 3000'
Thursday Night 3500'
Friday Morning 5000'
Friday Afternoon 8500'
West North Elevation
Thursday Morning 5000'
Thursday Afternoon 4500'
Thursday Evening 2500'
Thursday Night 2500'
Friday Morning 3000'
Friday Afternoon 3500'
West Central Elevation
Thursday Morning 6000'
Thursday Afternoon 5000'
Thursday Evening 3000'
Thursday Night 2500'
Friday Morning 3000'
Friday Afternoon 3500'
West South Elevation
Thursday Morning 6500'
Thursday Afternoon 5000'
Thursday Evening 3000'
Thursday Night 2500'
Friday Morning 3000'
Friday Afternoon 5000'
Stevens Pass Elevation
Thursday Morning 6000'
Thursday Afternoon 5000'
Thursday Evening 3000'
Thursday Night 2500'
Friday Morning 3000'
Friday Afternoon 4000'
Snoqualmie Pass Elevation
Thursday Morning 6500'
Thursday Afternoon 5000'
Thursday Evening 3000'
Thursday Night 3000'
Friday Morning 3000'
Friday Afternoon 4000'
East North Elevation
Thursday Morning 5000'
Thursday Afternoon 4500'
Thursday Evening 2500'
Thursday Night 3000'
Friday Morning 3500'
Friday Afternoon 4000'
East Central Elevation
Thursday Morning 6500'
Thursday Afternoon 5000'
Thursday Evening 3500'
Thursday Night 2500'
Friday Morning 3500'
Friday Afternoon 4500'
East South Elevation
Thursday Morning 7500'
Thursday Afternoon 5500'
Thursday Evening 3500'
Thursday Night 3500'
Friday Morning 3500'
Friday Afternoon 5500'
Mt. Hood Elevation
Thursday Morning 7500'
Thursday Afternoon 5500'
Thursday Evening 4000'
Thursday Night 3500'
Friday Morning 3500'
Friday Afternoon 6000'

5000' Temperatures (°F)

Thursday Thursday Night
Max / Min Max / Min
Olympics 35 / 27 26 / 18
West North 35 / 27 26 / 23
West Central 36 / 27 26 / 24
West South 36 / 29 27 / 23
Stevens Pass 37 / 28 28 / 26
Snoqualmie Pass 36 / 28 28 / 26
East North 35 / 27 27 / 23
East Central 36 / 28 28 / 26
East South 36 / 30 29 / 25
Mt. Hood 37 / 33 32 / 23
Olympics 5000' Temperature Forecast
(Max / Min)
Thursday 35 / 27
Thursday Night 26 / 18
West North 5000' Temperature Forecast
(Max / Min)
Thursday 35 / 27
Thursday Night 26 / 23
West Central 5000' Temperature Forecast
(Max / Min)
Thursday 36 / 27
Thursday Night 26 / 24
West South 5000' Temperature Forecast
(Max / Min)
Thursday 36 / 29
Thursday Night 27 / 23
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Thursday 37 / 28
Thursday Night 28 / 26
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Thursday 36 / 28
Thursday Night 28 / 26
East North 5000' Temperature Forecast
(Max / Min)
Thursday 35 / 27
Thursday Night 27 / 23
East Central 5000' Temperature Forecast
(Max / Min)
Thursday 36 / 28
Thursday Night 28 / 26
East South 5000' Temperature Forecast
(Max / Min)
Thursday 36 / 30
Thursday Night 29 / 25
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Thursday 37 / 33
Thursday Night 32 / 23

Ridgeline Winds (mph)

Thursday Morning Thursday Afternoon Thursday Evening Thursday Night
Olympics WSW 15-25 W 15-25 WNW 5-15 NW 0-10
West North WSW 20-30 WSW 20-30 WNW 15-25 WNW 5-15
West Central WSW 20-30 WNW 15-25 WNW 20-30 NW 10-20
West South WSW 15-25 W 25-35 WNW 20-30 NW 5-15
Stevens Pass WSW 20-30 W 20-30 WNW 20-30 WNW 10-20
Snoqualmie Pass W 25-35 W 25-35 WNW 25-35 NW 20-30
East North WSW 20-30 W 25-35 WNW 20-30 NW 15-25
East Central W 30-40 W 30-40 WNW 20-30 NW 15-25
East South W 25-35 W 25-35 WNW 20-30 NW 10-20
Mt. Hood WSW 20-30 W 25-35 W 20-30 NNW 5-15
Olympics Ridgeline Winds (mph)
Thursday Morning WSW 15-25
Thursday Afternoon W 15-25
Thursday Evening WNW 5-15
Thursday Night NW 0-10
West North Ridgeline Winds (mph)
Thursday Morning WSW 20-30
Thursday Afternoon WSW 20-30
Thursday Evening WNW 15-25
Thursday Night WNW 5-15
West Central Ridgeline Winds (mph)
Thursday Morning WSW 20-30
Thursday Afternoon WNW 15-25
Thursday Evening WNW 20-30
Thursday Night NW 10-20
West South Ridgeline Winds (mph)
Thursday Morning WSW 15-25
Thursday Afternoon W 25-35
Thursday Evening WNW 20-30
Thursday Night NW 5-15
Stevens Pass Ridgeline Winds (mph)
Thursday Morning WSW 20-30
Thursday Afternoon W 20-30
Thursday Evening WNW 20-30
Thursday Night WNW 10-20
Snoqualmie Pass Ridgeline Winds (mph)
Thursday Morning W 25-35
Thursday Afternoon W 25-35
Thursday Evening WNW 25-35
Thursday Night NW 20-30
East North Ridgeline Winds (mph)
Thursday Morning WSW 20-30
Thursday Afternoon W 25-35
Thursday Evening WNW 20-30
Thursday Night NW 15-25
East Central Ridgeline Winds (mph)
Thursday Morning W 30-40
Thursday Afternoon W 30-40
Thursday Evening WNW 20-30
Thursday Night NW 15-25
East South Ridgeline Winds (mph)
Thursday Morning W 25-35
Thursday Afternoon W 25-35
Thursday Evening WNW 20-30
Thursday Night NW 10-20
Mt. Hood Ridgeline Winds (mph)
Thursday Morning WSW 20-30
Thursday Afternoon W 25-35
Thursday Evening W 20-30
Thursday Night NNW 5-15

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

Previous forecast from Jan 19, 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