Issued: 4:46 PM PDT Sunday, April 6, 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

445pm Update: Increased West South winds tonight. 

A wet and active weather pattern starting this afternoon will continue through early next week. A slow moving frontal system in SSW flow will bring a round of moderate to locally heavy precipitation and generally stormy conditions this afternoon through tonight. The higher peaks and volcanoes along the west slopes of the Cascades will likely pick up an inch or more of water Sunday night. Even the Wentachees/Mission Ridge may be quite wet thanks to more southerly flow with this system. Unfortunately this system is starting warm and will be slow to cool, with snow levels starting around 7000' this evening and only descending to 5000-5500' late tonight. 

We won't get much of a break on Monday as a deep upper trough in the NE Pacific sends another vigorous upper level shortwave across the area, first reaching the Olympics in the morning and then spreading into the Cascades in the afternoon. While this isn't an atmospheric river, look for some heavier precipitation rates and strong winds for the Cascades during the afternoon with snow levels 4500-5000'.  

Showers will continue Monday night, potentially continuing to hammer the Mtn Loop to Mt Baker area as snow levels fall to 3500'. Before we can catch our breath, a new low pressure system will curl towards the San Juans, with renewed precipitation and wind Tuesday afternoon. 

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
Sunday Night Moderate to occasionally heavy rain and snow, heaviest southern slopes of the Olympics. Moderate to strong ridgeline winds.
Monday Light to moderate rain and snow showers. Moderate to strong ridgeline winds.
Sunday Night Moderate to occasionally heavy rain and snow. Moderate to strong ridgeline winds.
Monday Light rain and snow showers in the morning, then moderate showers in the afternoon. Moderate ridgeline winds becoming strong in the afternoon.
Sunday Night Moderate to occasionally heavy rain and snow. Moderate ridgeline winds.
Monday Light rain and snow showers in the morning, then moderate showers in the afternoon. Moderate ridgeline winds.
Sunday Night Moderate to occasionally heavy rain and snow. Moderate to strong ridgeline winds.
Monday Light rain and snow showers in the morning, then moderate showers in the afternoon. Moderate ridgeline winds becoming strong in the afternoon.
Sunday Night Moderate rain and snow. Light to moderate SE ridgeline winds becoming W late.
Monday Light rain and snow showers in the morning, then moderate showers in the afternoon. Moderate SW ridgeline winds and W Pass level winds.
Sunday Night Moderate rain and snow. Light to moderate SE ridgeline winds becoming W late.
Monday Light rain and snow showers in the morning, then moderate showers in the afternoon. Moderate SW ridgeline winds becoming strong in the afternoon. Moderate W pass level winds.
Sunday Night Light to moderate rain and snow. Moderate ridgeline winds.
Monday Mostly cloudy with scattered light rain and snow showers in the morning, then moderate showers in the afternoon. Moderate ridgeline winds.
Sunday Night Light to moderate rain and snow. Moderate ridgeline winds.
Monday Mostly cloudy with scattered light rain and snow showers in the morning, then moderate showers in the afternoon. Moderate ridgeline winds.
Sunday Night Light to moderate rain and snow. Moderate ridgeline winds.
Monday Mostly cloudy with scattered light rain and snow showers in the morning, then moderate showers in the afternoon. Moderate ridgeline winds.
Sunday Night Moderate to occasionally heavy rain and snow. Moderate to strong ridgeline winds.
Monday Scattered light rain and snow showers in the morning, then moderate showers in the afternoon. Moderate to strong ridgeline winds.

Issued: 4:46 PM PDT Sunday, April 6, 2025

Precipitation (in)

Sunday Night Monday Monday Night Tuesday
5 pm - 5 am 5 am - 5 pm 5 pm - 5 am 5 am - 5 pm
Hurricane Ridge 0.25 0.25 - 0.50 0.25 0.25 - 0.50
Mt Baker Ski Area 1.00 0.50 0.50 - 0.75 0.50
Mt. Loop - Barlow Pass 0.75 0.25 - 0.50 0.50 0.50
Stevens Pass 0.50 0.25 0.25 - 0.50 0.25 - 0.50
Snoqualmie Pass 0.50 - 0.75 0.25 - 0.50 0.25 - 0.50 0.50
Crystal Mt 0.75 0.25 - 0.50 0.25 0.25 - 0.50
Paradise 0.75 -1.00 0.50 - 0.75 0.50 - 0.75 0.50 - 0.75
White Pass 0.50 0.25 - 0.50 0.25 - 0.50 0.25 - 0.50
Washington Pass 0.25 - 0.50 LT 0.25 LT 0.10 LT 0.25
Mission Ridge 0.50 LT 0.25 LT 0.10 LT 0.10
Salmon la Sac - Gallagher Head 0.25 - 0.50 LT 0.25 0.25 0.25
Tieton River - Darland Mt. 0.25 - 0.50 LT 0.25 0.25 0.25 - 0.50
Mt Hood Meadows 0.75 0.50 LT 0.25 0.50
Timberline 1.00 0.50 - 0.75 0.25 0.50 - 0.75
Hurricane Ridge Precipitation (in)
Sunday Night 0.25
Monday 0.25 - 0.50
Monday Night 0.25
Tuesday 0.25 - 0.50
Mt Baker Ski Area Precipitation (in)
Sunday Night 1.00
Monday 0.50
Monday Night 0.50 - 0.75
Tuesday 0.50
Mt. Loop - Barlow Pass Precipitation (in)
Sunday Night 0.75
Monday 0.25 - 0.50
Monday Night 0.50
Tuesday 0.50
Stevens Pass Precipitation (in)
Sunday Night 0.50
Monday 0.25
Monday Night 0.25 - 0.50
Tuesday 0.25 - 0.50
Snoqualmie Pass Precipitation (in)
Sunday Night 0.50 - 0.75
Monday 0.25 - 0.50
Monday Night 0.25 - 0.50
Tuesday 0.50
Crystal Mt Precipitation (in)
Sunday Night 0.75
Monday 0.25 - 0.50
Monday Night 0.25
Tuesday 0.25 - 0.50
Paradise Precipitation (in)
Sunday Night 0.75 -1.00
Monday 0.50 - 0.75
Monday Night 0.50 - 0.75
Tuesday 0.50 - 0.75
White Pass Precipitation (in)
Sunday Night 0.50
Monday 0.25 - 0.50
Monday Night 0.25 - 0.50
Tuesday 0.25 - 0.50
Washington Pass Precipitation (in)
Sunday Night 0.25 - 0.50
Monday LT 0.25
Monday Night LT 0.10
Tuesday LT 0.25
Mission Ridge Precipitation (in)
Sunday Night 0.50
Monday LT 0.25
Monday Night LT 0.10
Tuesday LT 0.10
Salmon la Sac - Gallagher Head Precipitation (in)
Sunday Night 0.25 - 0.50
Monday LT 0.25
Monday Night 0.25
Tuesday 0.25
Tieton River - Darland Mt. Precipitation (in)
Sunday Night 0.25 - 0.50
Monday LT 0.25
Monday Night 0.25
Tuesday 0.25 - 0.50
Mt Hood Meadows Precipitation (in)
Sunday Night 0.75
Monday 0.50
Monday Night LT 0.25
Tuesday 0.50
Timberline Precipitation (in)
Sunday Night 1.00
Monday 0.50 - 0.75
Monday Night 0.25
Tuesday 0.50 - 0.75

Issued: 4:46 PM PDT Sunday, April 6, 2025

Snow Level (ft)

Sunday Evening Sunday Night Monday Morning Monday Afternoon Monday Evening Monday Night Tuesday Morning Tuesday Afternoon
Olympics 6500' 5000' 4500' 4500' 4000' 3500' 4000' 4000'
West North 7000' 5500' 5000' 5000' 4000' 3500' 4000' 4000'
West Central 7000' 5500' 5000' 5000' 4000' 3500' 4000' 4000'
West South 7000' 5500' 5000' 5000' 4000' 3500' 4000' 4000'
Stevens Pass 7000' 5500' 5000' 5500' 4000' 3500' 4000' 4000'
Snoqualmie Pass 7000' 5500' 5000' 5000' 4000' 3500' 4000' 4000'
East North 6500' 5500' 5500' 6000' 4000' 3500' 4000' 5000'
East Central 7000' 5500' 5500' 6000' 4000' 3500' 4000' 5000'
East South 7000' 5500' 5500' 6000' 4000' 3500' 4000' 5000'
Mt. Hood 7000' 5500' 5500' 5000' 4000' 3500' 4000' 4500'
Olympics Elevation
Sunday Evening 6500'
Sunday Night 5000'
Monday Morning 4500'
Monday Afternoon 4500'
Monday Evening 4000'
Monday Night 3500'
Tuesday Morning 4000'
Tuesday Afternoon 4000'
West North Elevation
Sunday Evening 7000'
Sunday Night 5500'
Monday Morning 5000'
Monday Afternoon 5000'
Monday Evening 4000'
Monday Night 3500'
Tuesday Morning 4000'
Tuesday Afternoon 4000'
West Central Elevation
Sunday Evening 7000'
Sunday Night 5500'
Monday Morning 5000'
Monday Afternoon 5000'
Monday Evening 4000'
Monday Night 3500'
Tuesday Morning 4000'
Tuesday Afternoon 4000'
West South Elevation
Sunday Evening 7000'
Sunday Night 5500'
Monday Morning 5000'
Monday Afternoon 5000'
Monday Evening 4000'
Monday Night 3500'
Tuesday Morning 4000'
Tuesday Afternoon 4000'
Stevens Pass Elevation
Sunday Evening 7000'
Sunday Night 5500'
Monday Morning 5000'
Monday Afternoon 5500'
Monday Evening 4000'
Monday Night 3500'
Tuesday Morning 4000'
Tuesday Afternoon 4000'
Snoqualmie Pass Elevation
Sunday Evening 7000'
Sunday Night 5500'
Monday Morning 5000'
Monday Afternoon 5000'
Monday Evening 4000'
Monday Night 3500'
Tuesday Morning 4000'
Tuesday Afternoon 4000'
East North Elevation
Sunday Evening 6500'
Sunday Night 5500'
Monday Morning 5500'
Monday Afternoon 6000'
Monday Evening 4000'
Monday Night 3500'
Tuesday Morning 4000'
Tuesday Afternoon 5000'
East Central Elevation
Sunday Evening 7000'
Sunday Night 5500'
Monday Morning 5500'
Monday Afternoon 6000'
Monday Evening 4000'
Monday Night 3500'
Tuesday Morning 4000'
Tuesday Afternoon 5000'
East South Elevation
Sunday Evening 7000'
Sunday Night 5500'
Monday Morning 5500'
Monday Afternoon 6000'
Monday Evening 4000'
Monday Night 3500'
Tuesday Morning 4000'
Tuesday Afternoon 5000'
Mt. Hood Elevation
Sunday Evening 7000'
Sunday Night 5500'
Monday Morning 5500'
Monday Afternoon 5000'
Monday Evening 4000'
Monday Night 3500'
Tuesday Morning 4000'
Tuesday Afternoon 4500'

Issued: 4:46 PM PDT Sunday, April 6, 2025

5000' Temperatures (°F)

Sunday Night Monday
Max / Min Max / Min
Olympics 37 / 30 34 / 29
West North 39 / 31 34 / 31
West Central 40 / 31 36 / 30
West South 41 / 32 35 / 31
Stevens Pass 42 / 32 37 / 32
Snoqualmie Pass 41 / 32 36 / 31
East North 40 / 32 39 / 32
East Central 42 / 33 39 / 32
East South 42 / 33 38 / 31
Mt. Hood 42 / 33 35 / 32
Olympics 5000' Temperature Forecast
(Max / Min)
Sunday Night 37 / 30
Monday 34 / 29
West North 5000' Temperature Forecast
(Max / Min)
Sunday Night 39 / 31
Monday 34 / 31
West Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 40 / 31
Monday 36 / 30
West South 5000' Temperature Forecast
(Max / Min)
Sunday Night 41 / 32
Monday 35 / 31
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 42 / 32
Monday 37 / 32
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 41 / 32
Monday 36 / 31
East North 5000' Temperature Forecast
(Max / Min)
Sunday Night 40 / 32
Monday 39 / 32
East Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 42 / 33
Monday 39 / 32
East South 5000' Temperature Forecast
(Max / Min)
Sunday Night 42 / 33
Monday 38 / 31
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Sunday Night 42 / 33
Monday 35 / 32

Issued: 4:46 PM PDT Sunday, April 6, 2025

Ridgeline Winds (mph)

Sunday Evening Sunday Night Monday Morning Monday Afternoon
Olympics S 10-20 SW 10-20 S 15-25 SW 20-30
West North S 15-25 SSW 10-20 S 10-20 SSW 20-30
West Central S 15-25 SW 10-20 SSW 10-20 SW 15-25
West South S 20-30 SW 20-30 SSW 10-20 SW 20-30
Stevens Pass SSE 5-15 WSW 10-20 SW 5-15 WSW 15-25
Snoqualmie Pass SE 10-20 WSW 15-25 SW 10-20 WSW 20-30
East North S 10-20 SW 10-20 SW 10-20 SW 15-25
East Central S 10-20 WSW 15-25 WSW 15-25 WSW 15-25
East South S 10-20 WSW 10-20 WSW 10-20 WSW 15-25
Mt. Hood SW 20-30 SW 15-25 SW 20-30 SW 30-40
Olympics Ridgeline Winds (mph)
Sunday Evening S 10-20
Sunday Night SW 10-20
Monday Morning S 15-25
Monday Afternoon SW 20-30
West North Ridgeline Winds (mph)
Sunday Evening S 15-25
Sunday Night SSW 10-20
Monday Morning S 10-20
Monday Afternoon SSW 20-30
West Central Ridgeline Winds (mph)
Sunday Evening S 15-25
Sunday Night SW 10-20
Monday Morning SSW 10-20
Monday Afternoon SW 15-25
West South Ridgeline Winds (mph)
Sunday Evening S 20-30
Sunday Night SW 20-30
Monday Morning SSW 10-20
Monday Afternoon SW 20-30
Stevens Pass Ridgeline Winds (mph)
Sunday Evening SSE 5-15
Sunday Night WSW 10-20
Monday Morning SW 5-15
Monday Afternoon WSW 15-25
Snoqualmie Pass Ridgeline Winds (mph)
Sunday Evening SE 10-20
Sunday Night WSW 15-25
Monday Morning SW 10-20
Monday Afternoon WSW 20-30
East North Ridgeline Winds (mph)
Sunday Evening S 10-20
Sunday Night SW 10-20
Monday Morning SW 10-20
Monday Afternoon SW 15-25
East Central Ridgeline Winds (mph)
Sunday Evening S 10-20
Sunday Night WSW 15-25
Monday Morning WSW 15-25
Monday Afternoon WSW 15-25
East South Ridgeline Winds (mph)
Sunday Evening S 10-20
Sunday Night WSW 10-20
Monday Morning WSW 10-20
Monday Afternoon WSW 15-25
Mt. Hood Ridgeline Winds (mph)
Sunday Evening SW 20-30
Sunday Night SW 15-25
Monday Morning SW 20-30
Monday Afternoon SW 30-40

Issued: 4:46 PM PDT Sunday, April 6, 2025

Extended Weather Synopsis

Showers will begin to taper off into Wednesday morning as upper level ridging attempts to build over the inland NW. There's likely to be a few showers and more clouds lingering near the Canadian border, while sunnier and warmer conditions are found further south near Mt. Hood on Wednesday. The warmth will build for all areas Wednesday night into at least the first half of Thursday with freezing levels likely rising to 7000-9000'.  A new Pacific frontal system will approach the PNW on Thursday, but may wait until late in the day or evening to push inland. 

Extended Snow Level (ft)

Tuesday Night Wednesday Wednesday Night Thursday
West North 3500' 5000' 7000' 7500'
Snoqualmie Pass 3500' 5500' 8000' 8000'
Mt. Hood 3500' 7000' 9000' 9000'
West North Elevation
Tuesday Night 3500'
Wednesday 5000'
Wednesday Night 7000'
Thursday 7500'
Snoqualmie Pass Elevation
Tuesday Night 3500'
Wednesday 5500'
Wednesday Night 8000'
Thursday 8000'
Mt. Hood Elevation
Tuesday Night 3500'
Wednesday 7000'
Wednesday Night 9000'
Thursday 9000'

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

Previous forecast from Apr 6, 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’.