Issued: 2:04 PM PDT Monday, April 22, 2024
by Dallas Glass

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

Weather Synopsis

Looking across the region this Monday afternoon, there is plenty of sunshine, mild temperatures, and generally light winds. Basically, it's a beautiful spring day. The high pressure ridge providing so much blue sky will shift into central Washington overnight. As it does so, look for easterly winds to increase. This will be most pronounced along the Cascade Crest and through the mountain passes. High clouds also drift into the area on the backside of the ridge. They should be relatively thin and limit, but not fully prevent, overnight cooling. 

On Tuesday, high clouds and filtered sunshine should be the norm. Easterly winds ease in the morning hours as the high pressure continues to push further inland. Eventually, winds switch onshore later in the day. Westerly flow and a bit of moisture should draw more low clouds into the region Tuesday night. A weakening frontal system well to our north will drag a few showers into the area around lunchtime Wednesday. Precipitation will be most likely in the Olympics, Mountain Loop Highway, and North Cascades. For the rest of the region, mostly cloudy conditions should prevail. 

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 Partly to mostly clear with high clouds.
Tuesday
Monday Night Partly to mostly clear with high clouds.
Tuesday
Monday Night Partly to mostly clear with high clouds. Light to moderate ESE winds developing.
Tuesday Partly to mostly sunny with high clouds.
Monday Night Partly to mostly clear with high clouds. Light to moderate ESE winds, stronger near Crystal Mt.
Tuesday Partly to mostly sunny with high clouds.
Monday Night Partly to mostly clear with high clouds. Light E pass level flow becoming moderate.
Tuesday Partly to mostly sunny with high clouds. Light E pass level flow turning W.
Monday Night Partly to mostly clear with high clouds. Light to moderate ESE ridgeline winds. Light E pass level flow becoming moderate.
Tuesday Partly to mostly sunny with high clouds. Ridgeline winds SE light to moderate becoming variable in the afternoon. Light E pass level flow turning W.
Monday Night Partly to mostly clear with high clouds. Winds becoming SE light to moderate.
Tuesday Partly to mostly sunny with high clouds.
Monday Night Partly to mostly clear with high clouds. Winds becoming SE light to moderate.
Tuesday Partly to mostly sunny with high clouds.
Monday Night Partly to mostly clear with high clouds. Light to moderate SE winds.
Tuesday Partly to mostly sunny with high clouds.
Monday Night Partly to mostly clear with high clouds.
Tuesday Partly to mostly sunny with high clouds.

Issued: 2:04 PM PDT Monday, April 22, 2024

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

Issued: 2:04 PM PDT Monday, April 22, 2024

Snow Level (ft)

Monday Evening* Monday Night* Tuesday Morning* Tuesday Afternoon Tuesday Evening Tuesday Night Wednesday Morning Wednesday Afternoon
Olympics 7000' 7000' 7000' 7000' 7500' 5500' 4000' 5000'
West North 6500' 6500' 6500' 7500' 7000' 6000' 4000' 4500'
West Central 6500' 6500' 7000' 8000' 7500' 6500' 4000' 4500'
West South 7000' 7000' 7000' 8500' 8000' 7500' 6000' 6000'
Stevens Pass 6500' 6500' 6500' 8000' 7500' 6500' 4500' 5500'
Snoqualmie Pass 7000' 7000' 7000' 8000' 8000' 7000' 5000' 5500'
East North 6500' 6000' 6000' 7500' 7500' 6000' 4500' 5000'
East Central 6500' 6500' 6500' 8000' 8000' 7500' 6000' 6000'
East South 6500' 7000' 8000' 8500' 8000' 8000' 6500' 7000'
Mt. Hood 9000' 9000' 9500' 9500' 9500' 9000' 8500' 7500'
Olympics Elevation
Monday Evening* 7000'
Monday Night* 7000'
Tuesday Morning* 7000'
Tuesday Afternoon 7000'
Tuesday Evening 7500'
Tuesday Night 5500'
Wednesday Morning 4000'
Wednesday Afternoon 5000'
West North Elevation
Monday Evening* 6500'
Monday Night* 6500'
Tuesday Morning* 6500'
Tuesday Afternoon 7500'
Tuesday Evening 7000'
Tuesday Night 6000'
Wednesday Morning 4000'
Wednesday Afternoon 4500'
West Central Elevation
Monday Evening* 6500'
Monday Night* 6500'
Tuesday Morning* 7000'
Tuesday Afternoon 8000'
Tuesday Evening 7500'
Tuesday Night 6500'
Wednesday Morning 4000'
Wednesday Afternoon 4500'
West South Elevation
Monday Evening* 7000'
Monday Night* 7000'
Tuesday Morning* 7000'
Tuesday Afternoon 8500'
Tuesday Evening 8000'
Tuesday Night 7500'
Wednesday Morning 6000'
Wednesday Afternoon 6000'
Stevens Pass Elevation
Monday Evening* 6500'
Monday Night* 6500'
Tuesday Morning* 6500'
Tuesday Afternoon 8000'
Tuesday Evening 7500'
Tuesday Night 6500'
Wednesday Morning 4500'
Wednesday Afternoon 5500'
Snoqualmie Pass Elevation
Monday Evening* 7000'
Monday Night* 7000'
Tuesday Morning* 7000'
Tuesday Afternoon 8000'
Tuesday Evening 8000'
Tuesday Night 7000'
Wednesday Morning 5000'
Wednesday Afternoon 5500'
East North Elevation
Monday Evening* 6500'
Monday Night* 6000'
Tuesday Morning* 6000'
Tuesday Afternoon 7500'
Tuesday Evening 7500'
Tuesday Night 6000'
Wednesday Morning 4500'
Wednesday Afternoon 5000'
East Central Elevation
Monday Evening* 6500'
Monday Night* 6500'
Tuesday Morning* 6500'
Tuesday Afternoon 8000'
Tuesday Evening 8000'
Tuesday Night 7500'
Wednesday Morning 6000'
Wednesday Afternoon 6000'
East South Elevation
Monday Evening* 6500'
Monday Night* 7000'
Tuesday Morning* 8000'
Tuesday Afternoon 8500'
Tuesday Evening 8000'
Tuesday Night 8000'
Wednesday Morning 6500'
Wednesday Afternoon 7000'
Mt. Hood Elevation
Monday Evening* 9000'
Monday Night* 9000'
Tuesday Morning* 9500'
Tuesday Afternoon 9500'
Tuesday Evening 9500'
Tuesday Night 9000'
Wednesday Morning 8500'
Wednesday Afternoon 7500'

Issued: 2:04 PM PDT Monday, April 22, 2024

5000' Temperatures (°F)

Monday Night Tuesday
Max / Min Max / Min
Olympics 39 / 31 44 / 32
West North 39 / 32 44 / 32
West Central 40 / 32 45 / 31
West South 45 / 32 52 / 31
Stevens Pass 41 / 32 50 / 31
Snoqualmie Pass 41 / 31 47 / 31
East North 41 / 31 47 / 31
East Central 40 / 31 48 / 31
East South 41 / 30 51 / 30
Mt. Hood 45 / 34 53 / 33
Olympics 5000' Temperature Forecast
(Max / Min)
Monday Night 39 / 31
Tuesday 44 / 32
West North 5000' Temperature Forecast
(Max / Min)
Monday Night 39 / 32
Tuesday 44 / 32
West Central 5000' Temperature Forecast
(Max / Min)
Monday Night 40 / 32
Tuesday 45 / 31
West South 5000' Temperature Forecast
(Max / Min)
Monday Night 45 / 32
Tuesday 52 / 31
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Monday Night 41 / 32
Tuesday 50 / 31
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Monday Night 41 / 31
Tuesday 47 / 31
East North 5000' Temperature Forecast
(Max / Min)
Monday Night 41 / 31
Tuesday 47 / 31
East Central 5000' Temperature Forecast
(Max / Min)
Monday Night 40 / 31
Tuesday 48 / 31
East South 5000' Temperature Forecast
(Max / Min)
Monday Night 41 / 30
Tuesday 51 / 30
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Monday Night 45 / 34
Tuesday 53 / 33

Issued: 2:04 PM PDT Monday, April 22, 2024

Ridgeline Winds (mph)

Monday Evening Monday Night Tuesday Morning Tuesday Afternoon
Olympics ESE 0-10 S 0-10 SW 0-10 SW 5-15
West North E 5-15 SE 5-15 S 5-15 SSW 5-15
West Central E 5-15 ESE 10-20 S 5-15 SW 5-15
West South ESE 10-20 ESE 10-20 SE 5-15 SW 5-15
Stevens Pass E 5-15 ESE 10-20 SE 5-15 VAR 0-10
Snoqualmie Pass E 10-20 ESE 10-20 SE 10-20 VAR 0-10
East North E 5-15 SE 10-20 SSE 5-15 SSW 5-15
East Central E 5-15 SE 10-20 SSE 5-15 SW 5-15
East South ESE 10-20 SE 10-20 SSE 5-15 SW 5-15
Mt. Hood VAR 0-10 S 5-15 SW 5-15 W 5-15
Olympics Ridgeline Winds (mph)
Monday Evening ESE 0-10
Monday Night S 0-10
Tuesday Morning SW 0-10
Tuesday Afternoon SW 5-15
West North Ridgeline Winds (mph)
Monday Evening E 5-15
Monday Night SE 5-15
Tuesday Morning S 5-15
Tuesday Afternoon SSW 5-15
West Central Ridgeline Winds (mph)
Monday Evening E 5-15
Monday Night ESE 10-20
Tuesday Morning S 5-15
Tuesday Afternoon SW 5-15
West South Ridgeline Winds (mph)
Monday Evening ESE 10-20
Monday Night ESE 10-20
Tuesday Morning SE 5-15
Tuesday Afternoon SW 5-15
Stevens Pass Ridgeline Winds (mph)
Monday Evening E 5-15
Monday Night ESE 10-20
Tuesday Morning SE 5-15
Tuesday Afternoon VAR 0-10
Snoqualmie Pass Ridgeline Winds (mph)
Monday Evening E 10-20
Monday Night ESE 10-20
Tuesday Morning SE 10-20
Tuesday Afternoon VAR 0-10
East North Ridgeline Winds (mph)
Monday Evening E 5-15
Monday Night SE 10-20
Tuesday Morning SSE 5-15
Tuesday Afternoon SSW 5-15
East Central Ridgeline Winds (mph)
Monday Evening E 5-15
Monday Night SE 10-20
Tuesday Morning SSE 5-15
Tuesday Afternoon SW 5-15
East South Ridgeline Winds (mph)
Monday Evening ESE 10-20
Monday Night SE 10-20
Tuesday Morning SSE 5-15
Tuesday Afternoon SW 5-15
Mt. Hood Ridgeline Winds (mph)
Monday Evening VAR 0-10
Monday Night S 5-15
Tuesday Morning SW 5-15
Tuesday Afternoon W 5-15

Issued: 2:04 PM PDT Monday, April 22, 2024

Extended Weather Synopsis

Wednesday starts a period of unsettled weather. You could just about cover every 12-hour period with a "chance of showers" and mild temperatures. Onshore flow and a series of weak disturbances should provide light rain and high elevation snow. None of these storms look that impressive. Given the time of year, you can almost bank on a few moments of sunshine each day, particularly near and east of the Cascade crest. 

Extended Snow Level (ft)

Wednesday Night Thursday Thursday Night Friday
West North 4500' 4500' 4000' 5000'
Snoqualmie Pass 5000' 5000' 4500' 5000'
Mt. Hood 6000' 5500' 5000' 5000'
West North Elevation
Wednesday Night 4500'
Thursday 4500'
Thursday Night 4000'
Friday 5000'
Snoqualmie Pass Elevation
Wednesday Night 5000'
Thursday 5000'
Thursday Night 4500'
Friday 5000'
Mt. Hood Elevation
Wednesday Night 6000'
Thursday 5500'
Thursday Night 5000'
Friday 5000'

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

Previous forecast from Apr 21, 2024

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’.