Issued: 4:15 PM PDT Monday, March 31, 2025
by Dennis D'Amico

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

Weather Synopsis

415pm Update: Increased precipitation forecast for West Central tonight

Cool, mostly cloudy, and showery weather, especially for the west slopes of the Cascades, Mt Hood, and the Olympics, will persist through Wednesday as an offshore upper low slowly weakens and pushes inland. Widespread shower activity this afternoon should fade overnight, but moderate westerly ridgeline winds will continue in most areas. The nature of the showers makes it difficult to pinpoint who will see a trace and who might see 2-3" of new snow. 

Showers on Tuesday should be more concentrated near and along the west slopes of the Cascades from about I-90 and northward.  Further south, showers will be more scattered but there still be plenty of cloud cover. Moderate NW ridgeline winds will be the strongest near the central WA Cascades and south to Mt Hood. 

We'll be on the backside of a broad upper level trough covering the western third of the country Tuesday night and Wendesday.  An upper level disturbance sliding south over the area should lead to a brief Puget Sound convergence zone late Tuesday night through Wednesday morning. More mundane showers driven by day-time heating should take over for by Wednesday afternoon. Afternoon high temperatures will be slightly warmer east of the Cascade crest on Tuesday and 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
Monday Night Mostly cloudy with light to moderate rain and snow showers becoming scattered showers after midnight. Light to moderate ridgeline winds.
Tuesday Mostly cloudy with scattered light to occasionally moderate rain and snow showers. Light to moderate ridgeline winds.
Monday Night Mostly cloudy with light to moderate rain and snow showers becoming scattered showers after midnight. Light to moderate ridgeline winds.
Tuesday Mostly cloudy with scattered light to occasionally moderate rain and snow showers. Light to moderate ridgeline winds.
Monday Night Mostly cloudy with light to moderate rain and snow showers. Light to moderate ridgeline winds.
Tuesday Mostly cloudy with light to moderate rain and snow showers. Light to moderate ridgeline winds.
Monday Night Mostly cloudy with light to moderate rain and snow showers becoming scattered showers after midnight. Light to moderate ridgeline winds.
Tuesday Mostly cloudy with light to moderate rain and snow showers. Moderate ridgeline winds.
Monday Night Mostly cloudy with light to moderate rain and snow showers becoming scattered showers after midnight. Light to moderate W ridgeline and Pass level winds.
Tuesday Mostly cloudy with light to moderate rain and snow showers. Light to moderate ridgeline winds. Light to moderate W to NW ridgeline and Pass level winds increasing in the afternoon.
Monday Night Mostly cloudy with light to moderate rain and snow showers becoming scattered showers after midnight. Light to moderate W ridgeline and Pass level winds.
Tuesday Mostly cloudy with light to moderate rain and snow showers. Light to moderate W to NW ridgeline and Pass level winds increasing in the afternoon.
Monday Night Mostly cloudy with light to moderate rain and snow showers becoming scattered showers after midnight. Light to moderate ridgeline winds.
Tuesday Partly sunny to mostly cloudy with scattered light to occasionally moderate rain and snow showers. Cloudier skies near the Cascade crest. Light to moderate ridgeline winds.
Monday Night Mostly cloudy with light to moderate rain and snow showers becoming scattered showers after midnight. Light to moderate ridgeline winds.
Tuesday Partly sunny to mostly cloudy with scattered light to occasionally moderate rain and snow showers. Cloudier skies near the Cascade crest. Moderate ridgeline winds.
Monday Night Mostly cloudy with light to moderate rain and snow showers becoming scattered showers after midnight. Light to moderate ridgeline winds.
Tuesday Partly sunny to mostly cloudy with scattered light to occasionally moderate rain and snow showers. Cloudier skies near the Cascade crest. Moderate ridgeline winds.
Monday Night Mostly cloudy with light to moderate rain and snow showers becoming scattered showers after midnight. Light to moderate ridgeline winds.
Tuesday Partly sunny to mostly cloudy with scattered light to occasionally moderate rain and snow showers. Moderate ridgeline winds.

Issued: 4:15 PM PDT Monday, March 31, 2025

Precipitation (in)

Monday Night Tuesday Tuesday Night Wednesday
5 pm - 5 am 5 am - 5 pm 5 pm - 5 am 5 am - 5 pm
Hurricane Ridge LT 0.25 LT 0.10 LT 0.10 LT 0.10
Mt Baker Ski Area LT 0.25 LT 0.10 LT 0.10 LT 0.10
Mt. Loop - Barlow Pass 0.25 LT 0.25 LT 0.25 LT 0.10
Stevens Pass LT 0.25 LT 0.25 LT 0.25 LT 0.10
Snoqualmie Pass LT 0.25 LT 0.25 LT 0.25 LT 0.10
Crystal Mt LT 0.10 LT 0.10 LT 0.10 LT 0.10
Paradise LT 0.25 LT 0.10 LT 0.25 LT 0.10
White Pass LT 0.10 LT 0.10 LT 0.10 LT 0.10
Washington Pass LT 0.10 LT 0.10 LT 0.10 LT 0.10
Mission Ridge LT 0.10 0 0 0
Salmon la Sac - Gallagher Head LT 0.10 LT 0.10 LT 0.10 LT 0.10
Tieton River - Darland Mt. LT 0.10 LT 0.10 LT 0.10 LT 0.10
Mt Hood Meadows LT 0.10 LT 0.10 LT 0.10 LT 0.10
Timberline LT 0.10 LT 0.10 LT 0.25 LT 0.10
Hurricane Ridge Precipitation (in)
Monday Night LT 0.25
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.10
Mt Baker Ski Area Precipitation (in)
Monday Night LT 0.25
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.10
Mt. Loop - Barlow Pass Precipitation (in)
Monday Night 0.25
Tuesday LT 0.25
Tuesday Night LT 0.25
Wednesday LT 0.10
Stevens Pass Precipitation (in)
Monday Night LT 0.25
Tuesday LT 0.25
Tuesday Night LT 0.25
Wednesday LT 0.10
Snoqualmie Pass Precipitation (in)
Monday Night LT 0.25
Tuesday LT 0.25
Tuesday Night LT 0.25
Wednesday LT 0.10
Crystal Mt Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.10
Paradise Precipitation (in)
Monday Night LT 0.25
Tuesday LT 0.10
Tuesday Night LT 0.25
Wednesday LT 0.10
White Pass Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.10
Washington Pass Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.10
Mission Ridge Precipitation (in)
Monday Night LT 0.10
Tuesday 0
Tuesday Night 0
Wednesday 0
Salmon la Sac - Gallagher Head Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.10
Tieton River - Darland Mt. Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.10
Mt Hood Meadows Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.10
Timberline Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night LT 0.25
Wednesday LT 0.10

Issued: 4:15 PM PDT Monday, March 31, 2025

Snow Level (ft)

Monday Evening Monday Night Tuesday Morning Tuesday Afternoon Tuesday Evening Tuesday Night Wednesday Morning Wednesday Afternoon
Olympics 3000' 2500' 3000' 3500' 3000' 2500' 3000' 3500'
West North 3000' 2500' 3000' 3500' 3000' 2500' 3000' 3500'
West Central 3000' 2500' 3000' 3500' 3000' 2500' 3000' 3500'
West South 3000' 2500' 3000' 3500' 3000' 2500' 3000' 3500'
Stevens Pass 3000' 2500' 3000' 4000' 3000' 2500' 3000' 4000'
Snoqualmie Pass 3000' 2500' 3000' 3500' 3000' 2500' 3000' 3500'
East North 3000' 2500' 3500' 4500' 3000' 2500' 3500' 4500'
East Central 3000' 2500' 3500' 4500' 3000' 2500' 3500' 4500'
East South 3000' 2500' 3500' 4500' 3000' 2500' 3500' 4500'
Mt. Hood 3000' 2500' 3000' 4000' 3000' 2500' 3000' 4000'
Olympics Elevation
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 3000'
Tuesday Afternoon 3500'
Tuesday Evening 3000'
Tuesday Night 2500'
Wednesday Morning 3000'
Wednesday Afternoon 3500'
West North Elevation
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 3000'
Tuesday Afternoon 3500'
Tuesday Evening 3000'
Tuesday Night 2500'
Wednesday Morning 3000'
Wednesday Afternoon 3500'
West Central Elevation
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 3000'
Tuesday Afternoon 3500'
Tuesday Evening 3000'
Tuesday Night 2500'
Wednesday Morning 3000'
Wednesday Afternoon 3500'
West South Elevation
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 3000'
Tuesday Afternoon 3500'
Tuesday Evening 3000'
Tuesday Night 2500'
Wednesday Morning 3000'
Wednesday Afternoon 3500'
Stevens Pass Elevation
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 3000'
Tuesday Afternoon 4000'
Tuesday Evening 3000'
Tuesday Night 2500'
Wednesday Morning 3000'
Wednesday Afternoon 4000'
Snoqualmie Pass Elevation
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 3000'
Tuesday Afternoon 3500'
Tuesday Evening 3000'
Tuesday Night 2500'
Wednesday Morning 3000'
Wednesday Afternoon 3500'
East North Elevation
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 3500'
Tuesday Afternoon 4500'
Tuesday Evening 3000'
Tuesday Night 2500'
Wednesday Morning 3500'
Wednesday Afternoon 4500'
East Central Elevation
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 3500'
Tuesday Afternoon 4500'
Tuesday Evening 3000'
Tuesday Night 2500'
Wednesday Morning 3500'
Wednesday Afternoon 4500'
East South Elevation
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 3500'
Tuesday Afternoon 4500'
Tuesday Evening 3000'
Tuesday Night 2500'
Wednesday Morning 3500'
Wednesday Afternoon 4500'
Mt. Hood Elevation
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 3000'
Tuesday Afternoon 4000'
Tuesday Evening 3000'
Tuesday Night 2500'
Wednesday Morning 3000'
Wednesday Afternoon 4000'

Issued: 4:15 PM PDT Monday, March 31, 2025

5000' Temperatures (°F)

Monday Night Tuesday
Max / Min Max / Min
Olympics 27 / 25 33 / 25
West North 30 / 26 32 / 27
West Central 29 / 26 31 / 26
West South 28 / 25 32 / 25
Stevens Pass 29 / 26 30 / 26
Snoqualmie Pass 27 / 25 30 / 25
East North 30 / 26 35 / 26
East Central 30 / 25 33 / 25
East South 29 / 25 34 / 24
Mt. Hood 27 / 25 32 / 24
Olympics 5000' Temperature Forecast
(Max / Min)
Monday Night 27 / 25
Tuesday 33 / 25
West North 5000' Temperature Forecast
(Max / Min)
Monday Night 30 / 26
Tuesday 32 / 27
West Central 5000' Temperature Forecast
(Max / Min)
Monday Night 29 / 26
Tuesday 31 / 26
West South 5000' Temperature Forecast
(Max / Min)
Monday Night 28 / 25
Tuesday 32 / 25
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Monday Night 29 / 26
Tuesday 30 / 26
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Monday Night 27 / 25
Tuesday 30 / 25
East North 5000' Temperature Forecast
(Max / Min)
Monday Night 30 / 26
Tuesday 35 / 26
East Central 5000' Temperature Forecast
(Max / Min)
Monday Night 30 / 25
Tuesday 33 / 25
East South 5000' Temperature Forecast
(Max / Min)
Monday Night 29 / 25
Tuesday 34 / 24
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Monday Night 27 / 25
Tuesday 32 / 24

Issued: 4:15 PM PDT Monday, March 31, 2025

Ridgeline Winds (mph)

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

Issued: 4:15 PM PDT Monday, March 31, 2025

Extended Weather Synopsis

Thursday will be a transition day as the broad upper trough moves further inland and strong upper level ridging offshore inches closer.  With northerly flow aloft, we may see a stray afternoon mountain shower, but expect more cloud cover in the morning, and more cloud cover in general for the northern half of the forecast area and clearer skies further south. The ridge will become the dominant large-scale weather feature on Friday, and we'll see a noticeable shift towards increased sunshine as freezing levels rise to 6000-7000 feet in the afternoon. 

Extended Snow Level (ft)

Wednesday Night Thursday Thursday Night Friday
West North 3000' 4500' 4500' 6500'
Snoqualmie Pass 3000' 4000' 4500' 6500'
Mt. Hood 3000' 5000' 4500' 6500'
West North Elevation
Wednesday Night 3000'
Thursday 4500'
Thursday Night 4500'
Friday 6500'
Snoqualmie Pass Elevation
Wednesday Night 3000'
Thursday 4000'
Thursday Night 4500'
Friday 6500'
Mt. Hood Elevation
Wednesday Night 3000'
Thursday 5000'
Thursday Night 4500'
Friday 6500'

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

Previous forecast from Mar 31, 2025

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’.

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