Issued: 2:42 PM PDT Sunday, April 7, 2024
by Robert Hahn

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

Weather Synopsis

Remnant post-frontal rain and snow showers continue for the Cascades Sunday evening, mostly ending overnight. Winds gradually shift SWerly ahead of the next system.

An active weather pattern develops at the beginning of the work week. A moisture-laden frontal system flattens a broad offshore ridge and toward our region from the WNW. As a warm front approaches on Monday, light to moderate rain and snow increase gradually spread throughout the mountains of Washington State. The Western Olympics, Mt Baker, and the Mountain Loop stand to pick up the most moisture (in the 0.25" - 0.5" of snow water equivalent range). Snow levels rise to 3500-4500 ft by the afternoon.

 The warm front transits the region Monday night with moderate to heavy rain, snow and peak snow levels in the 4000-5500 ft range (lower in the north). Light to moderate rain and snow should spill over onto the east slopes of the Cascades and Mt Hood.

Expect decreasing light to moderate rain and snow on Tuesday as a cold front brings slightly cooler and drier air into the region from the northwest. Snow levels should drop to 3500-4500 ft.

 

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 Cloudy with light rain and snow developing western part, mostly dry eastern part, and a chance of isolated sprinkles or flurries around Hurricane Ridge.
Monday Increasing light rain and snow (moderate western part).
Sunday Night Decreasing light rain and snow showers.
Monday Cloudy with light rain and snow in the morning becoming moderate in the afternoon.
Sunday Night Decreasing light rain and snow showers.
Monday Cloudy with light rain and snow developing the morning and becoming light to moderate in the afternoon.
Sunday Night Light rain and snow showers decrease or end overnight.
Monday Cloudy with light rain and snow developing in the morning and increasing during the afternoon.
Sunday Night Decreasing light rain and snow showers. Light ridgeline and W wind at the Pass.
Monday Cloudy with light rain and snow developing in the morning and increasing during the afternoon. Light ridgeline and W wind at the Pass.
Sunday Night Decreasing light rain and snow showers. Light to moderate ridgeline and light W wind at the Pass.
Monday Cloudy with light rain and snow developing in the morning and increasing during the afternoon. Light to moderate ridgeline and light W wind at the Pass.
Sunday Night Mostly cloudy.
Monday Cloudy with light rain and snow developing from late morning onward as ridgeline winds increase into the moderate range.
Sunday Night Mostly cloudy with a few showers ending near the Cascade Crest. Decreasing light to moderate ridgeline winds.
Monday Cloudy with light rain and snow developing from late morning onward as ridgeline winds increase into the moderate range.
Sunday Night Mostly cloudy with a few showers ending near the Cascade Crest.
Monday Cloudy with a chance of very light rain or snow developing in the afternoon.
Sunday Night Mostly cloudy with rain or snow showers decreasing or ending by midnight.
Monday Cloudy with a slight chance of very light rain or snow developing late in the day.

Issued: 2:42 PM PDT Sunday, April 7, 2024

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 LT 0.10 LT 0.25 0.25 LT 0.10
Mt Baker Ski Area LT 0.25 0.50 0.75 -1.00 0.25
Mt. Loop - Barlow Pass LT 0.10 0.25 1.00 - 1.50 0.50 - 0.75
Stevens Pass LT 0.10 LT 0.25 0.75 0.25
Snoqualmie Pass LT 0.10 0.25 0.75 0.25
Crystal Mt LT 0.10 LT 0.10 LT 0.10 LT 0.10
Paradise LT 0.10 LT 0.25 0.75 -1.00 0.25
White Pass LT 0.10 LT 0.10 0.25 - 0.50 LT 0.10
Washington Pass LT 0.10 LT 0.25 0.25 - 0.50 LT 0.10
Mission Ridge 0 0 LT 0.25 LT 0.10
Salmon la Sac - Gallagher Head LT 0.10 LT 0.25 0.25 - 0.50 LT 0.25
Tieton River - Darland Mt. LT 0.10 LT 0.10 LT 0.25 LT 0.10
Mt Hood Meadows LT 0.10 0 LT 0.25 LT 0.10
Timberline LT 0.10 0 LT 0.25 LT 0.25
Hurricane Ridge Precipitation (in)
Sunday Night LT 0.10
Monday LT 0.25
Monday Night 0.25
Tuesday LT 0.10
Mt Baker Ski Area Precipitation (in)
Sunday Night LT 0.25
Monday 0.50
Monday Night 0.75 -1.00
Tuesday 0.25
Mt. Loop - Barlow Pass Precipitation (in)
Sunday Night LT 0.10
Monday 0.25
Monday Night 1.00 - 1.50
Tuesday 0.50 - 0.75
Stevens Pass Precipitation (in)
Sunday Night LT 0.10
Monday LT 0.25
Monday Night 0.75
Tuesday 0.25
Snoqualmie Pass Precipitation (in)
Sunday Night LT 0.10
Monday 0.25
Monday Night 0.75
Tuesday 0.25
Crystal Mt Precipitation (in)
Sunday Night LT 0.10
Monday LT 0.10
Monday Night LT 0.10
Tuesday LT 0.10
Paradise Precipitation (in)
Sunday Night LT 0.10
Monday LT 0.25
Monday Night 0.75 -1.00
Tuesday 0.25
White Pass Precipitation (in)
Sunday Night LT 0.10
Monday LT 0.10
Monday Night 0.25 - 0.50
Tuesday LT 0.10
Washington Pass Precipitation (in)
Sunday Night LT 0.10
Monday LT 0.25
Monday Night 0.25 - 0.50
Tuesday LT 0.10
Mission Ridge Precipitation (in)
Sunday Night 0
Monday 0
Monday Night LT 0.25
Tuesday LT 0.10
Salmon la Sac - Gallagher Head Precipitation (in)
Sunday Night LT 0.10
Monday LT 0.25
Monday Night 0.25 - 0.50
Tuesday LT 0.25
Tieton River - Darland Mt. Precipitation (in)
Sunday Night LT 0.10
Monday LT 0.10
Monday Night LT 0.25
Tuesday LT 0.10
Mt Hood Meadows Precipitation (in)
Sunday Night LT 0.10
Monday 0
Monday Night LT 0.25
Tuesday LT 0.10
Timberline Precipitation (in)
Sunday Night LT 0.10
Monday 0
Monday Night LT 0.25
Tuesday LT 0.25

Issued: 2:42 PM PDT Sunday, April 7, 2024

Snow Level (ft)

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

Issued: 2:42 PM PDT Sunday, April 7, 2024

5000' Temperatures (°F)

Sunday Night Monday
Max / Min Max / Min
Olympics 29 / 24 34 / 28
West North 30 / 24 33 / 24
West Central 31 / 23 33 / 22
West South 32 / 23 35 / 23
Stevens Pass 32 / 23 36 / 23
Snoqualmie Pass 31 / 23 34 / 22
East North 34 / 24 37 / 24
East Central 34 / 23 37 / 23
East South 34 / 23 39 / 24
Mt. Hood 34 / 27 39 / 26
Olympics 5000' Temperature Forecast
(Max / Min)
Sunday Night 29 / 24
Monday 34 / 28
West North 5000' Temperature Forecast
(Max / Min)
Sunday Night 30 / 24
Monday 33 / 24
West Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 31 / 23
Monday 33 / 22
West South 5000' Temperature Forecast
(Max / Min)
Sunday Night 32 / 23
Monday 35 / 23
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 32 / 23
Monday 36 / 23
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 31 / 23
Monday 34 / 22
East North 5000' Temperature Forecast
(Max / Min)
Sunday Night 34 / 24
Monday 37 / 24
East Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 34 / 23
Monday 37 / 23
East South 5000' Temperature Forecast
(Max / Min)
Sunday Night 34 / 23
Monday 39 / 24
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Sunday Night 34 / 27
Monday 39 / 26

Issued: 2:42 PM PDT Sunday, April 7, 2024

Ridgeline Winds (mph)

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

Issued: 2:42 PM PDT Sunday, April 7, 2024

Extended Weather Synopsis

The previously flattened ridge rebounds Tuesday night, bringing increasingly warm and dry conditions. Freezing levels likely peak Wednesday night in the 5000-9000 ft range. A frontal system approaching on Thursday will bring increased clouds in the morning before light rain and snow arrive with cooling temperatures in the afternoon.

Extended Snow Level (ft)

Tuesday Night Wednesday Wednesday Night Thursday
West North 3000' 4000' 5000' 4000'
Snoqualmie Pass 4000' 5000' 6500' 5500'
Mt. Hood 6000' 7000' 8500' 8500'
West North Elevation
Tuesday Night 3000'
Wednesday 4000'
Wednesday Night 5000'
Thursday 4000'
Snoqualmie Pass Elevation
Tuesday Night 4000'
Wednesday 5000'
Wednesday Night 6500'
Thursday 5500'
Mt. Hood Elevation
Tuesday Night 6000'
Wednesday 7000'
Wednesday Night 8500'
Thursday 8500'

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

Previous forecast from Apr 7, 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’.