Issued: 3:33 PM PDT Sunday, April 10, 2022
by Robert Hahn

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

Weather Synopsis

Cold, wintry, and active weather continues over the Pacific Northwest through Monday. A slow-moving low pressure crossed the central Washington Cascades Sunday afternoon. Westerly flow behind the low should focus instability and lighter snow showers along the west slopes of the Cascades Sunday evening. Cold air behind the low should allow snow levels to drop to the Cascade foothills.

A stronger low pressure aims for northern Oregon Sunday night and deepens as it gains upper levels support from an upper-level low just south of Vancouver Island. Steady snowfall during the evening hours potentially becomes heavy at Mt. Hood overnight, with moderate snow spreading north to Chinook Pass on both sides of the Cascades. An upslope event develops for the east slopes of the Cascades in the early morning hours with moderate to heavy snowfall Monday morning for the Wenatchee Mountains and eastern parts of the Cascades East South region as moderate ESE winds develop and increasingly shift NE as the low moves east of the Cascades on Monday. As winds become NE Monday morning, the northern portions of the Olympic Mountains could also see some light to moderate upslope snowfall. Moderate and shifting winds also continue for Mt. Hood with moderate snowfall on Monday.

The upslope snow event tapers off by Monday evening as the low-pressure shifts to NE Oregon. Light snow showers with cool temperatures continue Monday night and get reinforced slightly on Tuesday with a very weak low sliding down the backside of the broader trough over the region and setting up shop near the mount of the Columbia River. We'll have to watch the potential for moderate snow to redevelop in the Mt. Hood area.

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 Scattered snow showers in the evening with light snow developing after midnight.
Monday Light to moderate upslope snowfall in the morning tapering or ending in the late morning hours. Becoming partly cloudy in the afternoon.
Sunday Night Light snow showers in the evening, then becoming mostly cloudy.
Monday Mostly cloudy.
Sunday Night Light snow showers in the evening, then remaining mostly cloudy.
Monday Mostly cloudy with light snow possible in the afternoon.
Sunday Night Light snow showers becoming steady light snow in the evening, then becoming light to moderate overnight.
Monday Light snow, heaviest at Crystal.
Sunday Night Very light snow showers in the evening transitioning to very light snow near and east of the pass overnight. Light W wind in the early evening, switching E and becoming light to moderate after midnight.
Monday Periods of light snow decreasing late in the day. Light to moderate E winds decreasing late in the day.
Sunday Night Very light snow showers in the evening transitioning to very light snow near and east of the pass overnight. Light W wind in the early evening, switching E and becoming light to moderate after midnight.
Monday Periods of light snow. Light to moderate E winds decreasing late in the day.
Sunday Night Very light snow showers in the evening transitioning to very light snow.
Monday Light snow in the morning with mostly cloudy skies in the afternoon.
Sunday Night Very light snow showers in the evening transitioning to very light snow.
Monday Upslope snowfall, heavy in the Wenatchee Mountains, moderate in the Icicle and Chelan area mountains, light closer to the Cascade Crest in the morning. Snowfall tapering in the afternoon. Strong ridgeline wind gusts.
Sunday Night Very light snow showers in the evening, then light snow developing and becoming light to moderate after midnight.
Monday Moderate to heavy snow in the morning. Light snow in the afternoon. Strong ridgeline wind gusts.
Sunday Night Moderate snow becoming heavy. Strong ridgeline winds likely on the north side of Mt. Hood overnight.
Monday Moderate snow. Strong ridgeline wind gusts.

Issued: 3:33 PM PDT Sunday, April 10, 2022

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

Issued: 3:33 PM PDT Sunday, April 10, 2022

Snow Level (ft)

Sunday Evening Sunday Night* Monday Morning* Monday Afternoon* Monday Evening Monday Night Tuesday Morning Tuesday Afternoon
Olympics 1000' 500' 500' 2000' 3000' 1500' 500' 2000'
West North 1500' 1000' 1500' 3500' 3500' 1500' 500' 2500'
West Central 1500' 1000' 1500' 2500' 2500' 1000' 500' 2000'
West South 2000' 500' 1000' 2000' 2000' 500' 500' 1500'
Stevens Pass 1500' 500' 1000' 2500' 2000' 500' 500' 1500'
Snoqualmie Pass 1500' 500' 1000' 2000' 2000' 500' 500' 1500'
East North 2500' 1000' 1000' 2500' 2000' 500' 500' 2000'
East Central 2000' 1000' 1000' 2000' 2000' 500' 0 1500'
East South 2000' 1000' 1000' 2000' 1500' 500' 500' 1000'
Mt. Hood 2000' 1500' 1000' 1500' 1500' 1500' 500' 1500'
Olympics Elevation
Sunday Evening 1000'
Sunday Night* 500'
Monday Morning* 500'
Monday Afternoon* 2000'
Monday Evening 3000'
Monday Night 1500'
Tuesday Morning 500'
Tuesday Afternoon 2000'
West North Elevation
Sunday Evening 1500'
Sunday Night* 1000'
Monday Morning* 1500'
Monday Afternoon* 3500'
Monday Evening 3500'
Monday Night 1500'
Tuesday Morning 500'
Tuesday Afternoon 2500'
West Central Elevation
Sunday Evening 1500'
Sunday Night* 1000'
Monday Morning* 1500'
Monday Afternoon* 2500'
Monday Evening 2500'
Monday Night 1000'
Tuesday Morning 500'
Tuesday Afternoon 2000'
West South Elevation
Sunday Evening 2000'
Sunday Night* 500'
Monday Morning* 1000'
Monday Afternoon* 2000'
Monday Evening 2000'
Monday Night 500'
Tuesday Morning 500'
Tuesday Afternoon 1500'
Stevens Pass Elevation
Sunday Evening 1500'
Sunday Night* 500'
Monday Morning* 1000'
Monday Afternoon* 2500'
Monday Evening 2000'
Monday Night 500'
Tuesday Morning 500'
Tuesday Afternoon 1500'
Snoqualmie Pass Elevation
Sunday Evening 1500'
Sunday Night* 500'
Monday Morning* 1000'
Monday Afternoon* 2000'
Monday Evening 2000'
Monday Night 500'
Tuesday Morning 500'
Tuesday Afternoon 1500'
East North Elevation
Sunday Evening 2500'
Sunday Night* 1000'
Monday Morning* 1000'
Monday Afternoon* 2500'
Monday Evening 2000'
Monday Night 500'
Tuesday Morning 500'
Tuesday Afternoon 2000'
East Central Elevation
Sunday Evening 2000'
Sunday Night* 1000'
Monday Morning* 1000'
Monday Afternoon* 2000'
Monday Evening 2000'
Monday Night 500'
Tuesday Morning 0'
Tuesday Afternoon 1500'
East South Elevation
Sunday Evening 2000'
Sunday Night* 1000'
Monday Morning* 1000'
Monday Afternoon* 2000'
Monday Evening 1500'
Monday Night 500'
Tuesday Morning 500'
Tuesday Afternoon 1000'
Mt. Hood Elevation
Sunday Evening 2000'
Sunday Night* 1500'
Monday Morning* 1000'
Monday Afternoon* 1500'
Monday Evening 1500'
Monday Night 1500'
Tuesday Morning 500'
Tuesday Afternoon 1500'

Issued: 3:33 PM PDT Sunday, April 10, 2022

5000' Temperatures (°F)

Sunday Night Monday
Max / Min Max / Min
Olympics 23 / 18 30 / 19
West North 23 / 17 31 / 18
West Central 24 / 18 31 / 19
West South 23 / 19 30 / 20
Stevens Pass 22 / 19 31 / 20
Snoqualmie Pass 23 / 19 30 / 20
East North 21 / 14 30 / 15
East Central 24 / 19 29 / 20
East South 23 / 19 28 / 20
Mt. Hood 27 / 25 29 / 26
Olympics 5000' Temperature Forecast
(Max / Min)
Sunday Night 23 / 18
Monday 30 / 19
West North 5000' Temperature Forecast
(Max / Min)
Sunday Night 23 / 17
Monday 31 / 18
West Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 24 / 18
Monday 31 / 19
West South 5000' Temperature Forecast
(Max / Min)
Sunday Night 23 / 19
Monday 30 / 20
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 22 / 19
Monday 31 / 20
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 23 / 19
Monday 30 / 20
East North 5000' Temperature Forecast
(Max / Min)
Sunday Night 21 / 14
Monday 30 / 15
East Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 24 / 19
Monday 29 / 20
East South 5000' Temperature Forecast
(Max / Min)
Sunday Night 23 / 19
Monday 28 / 20
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Sunday Night 27 / 25
Monday 29 / 26

Issued: 3:33 PM PDT Sunday, April 10, 2022

Ridgeline Winds (mph)

Sunday Evening Sunday Night Monday Morning Monday Afternoon
Olympics VAR 0-10 ENE 5-15 NE 10-20 N 0-10
West North VAR 0-10 ENE 5-15 ENE 5-15 NE 0-10
West Central WSW 0-10 ENE 5-15 ENE 5-15 NNE 0-10
West South WSW 0-10 E 10-20 ENE 10-20 NNE 5-15
Stevens Pass W 0-10 E 10-20 ENE 15-25 NE 5-15
Snoqualmie Pass WSW 5-15 E 10-20 E 15-25 NE 5-15
East North VAR 0-10 ENE 0-10 ENE 5-15 ENE 5-15
East Central VAR 0-10 E 10-20 ENE 20-30 NNE 15-25
East South WNW 5-15 E 10-20 ENE 15-25 NNE 10-20
Mt. Hood WSW 10-20 SSW 15-25 W 20-30 W 15-25
Olympics Ridgeline Winds (mph)
Sunday Evening VAR 0-10
Sunday Night ENE 5-15
Monday Morning NE 10-20
Monday Afternoon N 0-10
West North Ridgeline Winds (mph)
Sunday Evening VAR 0-10
Sunday Night ENE 5-15
Monday Morning ENE 5-15
Monday Afternoon NE 0-10
West Central Ridgeline Winds (mph)
Sunday Evening WSW 0-10
Sunday Night ENE 5-15
Monday Morning ENE 5-15
Monday Afternoon NNE 0-10
West South Ridgeline Winds (mph)
Sunday Evening WSW 0-10
Sunday Night E 10-20
Monday Morning ENE 10-20
Monday Afternoon NNE 5-15
Stevens Pass Ridgeline Winds (mph)
Sunday Evening W 0-10
Sunday Night E 10-20
Monday Morning ENE 15-25
Monday Afternoon NE 5-15
Snoqualmie Pass Ridgeline Winds (mph)
Sunday Evening WSW 5-15
Sunday Night E 10-20
Monday Morning E 15-25
Monday Afternoon NE 5-15
East North Ridgeline Winds (mph)
Sunday Evening VAR 0-10
Sunday Night ENE 0-10
Monday Morning ENE 5-15
Monday Afternoon ENE 5-15
East Central Ridgeline Winds (mph)
Sunday Evening VAR 0-10
Sunday Night E 10-20
Monday Morning ENE 20-30
Monday Afternoon NNE 15-25
East South Ridgeline Winds (mph)
Sunday Evening WNW 5-15
Sunday Night E 10-20
Monday Morning ENE 15-25
Monday Afternoon NNE 10-20
Mt. Hood Ridgeline Winds (mph)
Sunday Evening WSW 10-20
Sunday Night SSW 15-25
Monday Morning W 20-30
Monday Afternoon W 15-25

Issued: 3:33 PM PDT Sunday, April 10, 2022

Extended Weather Synopsis

Very light snow showers continue with unsettled weather and cooler than average weather regime through Wednesday. Models indicate the potential for a stronger low-pressure center to bring moderate snow to the Oregon Cascades on Thursday.

Extended Snow Level (ft)

Tuesday Night Wednesday Wednesday Night Thursday
West North 1500' 2500' 1500' 2000'
Snoqualmie Pass 500' 1500' 1000' 1500'
Mt. Hood 500' 1500' 1500' 1500'
West North Elevation
Tuesday Night 1500'
Wednesday 2500'
Wednesday Night 1500'
Thursday 2000'
Snoqualmie Pass Elevation
Tuesday Night 500'
Wednesday 1500'
Wednesday Night 1000'
Thursday 1500'
Mt. Hood Elevation
Tuesday Night 500'
Wednesday 1500'
Wednesday Night 1500'
Thursday 1500'

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

Previous forecast from Apr 9, 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’.