Issued: 2:35 PM PDT Sunday, April 2, 2023
by Dennis D'Amico

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

Weather Synopsis

A cold upper level low over the area continues to deliver scattered showers, low density snow, and below normal temperatures to the region. Scattered showers, some with brief but heavy snowfall rates, will continue into the evening and then taper down after midnight.  As the low drops south, we may see another convergence zone develop this evening, focusing on the Snoqualmie Pass area and the southwest Cascades. In general, showers will be less intense than Saturday night. At the base of the trough, Mt Hood will continue to see the most snow and wind overnight. Expect another chilly night with widespread mountain temperatures in the teens.  

Monday will be a cool day with scattered afternoon showers increasing in the afternoon.  We should see more sunshine on the east slopes of the Cascades before clouds increase over the higher terrain in the afternoon. 

The PNW will stay on the backside of the broad upper level trough Monday night and Tuesday. We'll see a weak disturbance sliding down the backside of the trough Monday night that attempts to re-focus additional showers into the Mt Hood area.  Showers should be more isolated on Tuesday. Over this period, heavier showers may contain graupel.

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 scattered light to occasionally moderate snow showers in the evening. Showers slowly tapering off overnight.
Monday Mostly cloudy in the morning with scattered afternoon light snow showers.
Sunday Night Cloudy with scattered light to occasionally moderate snow showers in the evening. Showers slowly tapering off overnight.
Monday Mostly cloudy in the morning with scattered afternoon light snow showers.
Sunday Night Cloudy with scattered light to occasionally moderate snow showers in the evening. Showers slowly tapering off overnight.
Monday Mostly cloudy in the morning with scattered afternoon light snow showers. Periods of moderate ridgeline winds.
Sunday Night Cloudy with light to occasionally moderate snow showers in the evening. Showers slowly tapering off overnight. Periods of moderate ridgeline winds.
Monday Mostly cloudy in the morning with scattered afternoon light to occasionally moderate snow showers. Periods of moderate ridgeline winds.
Sunday Night Cloudy with scattered light to occasionally moderate snow showers in the evening. Showers slowly tapering off overnight. Light to moderate ridgeline and Pass level W winds.
Monday Mostly cloudy in the morning with scattered afternoon light snow showers. Periods of moderate ridgeline and Pass level W winds.
Sunday Night Cloudy with light to occasionally moderate snow showers in the evening. Showers slowly tapering off overnight. Periods of moderate ridgeline and Pass level W winds.
Monday Mostly cloudy in the morning with scattered afternoon light snow showers. Periods of moderate ridgeline and Pass level W winds.
Sunday Night Mostly cloudy with scattered light to occasionally moderate snow showers in the evening. Then mostly cloudy with light isolated snow showers after midnight.
Monday Partly sunny in the morning, becoming mostly cloudy with scattered light snow showers in the afternoon. Periods of moderate ridgeline winds.
Sunday Night Mostly cloudy with scattered light to occasionally moderate snow showers in the evening. Then mostly cloudy with light isolated snow showers after midnight.
Monday Partly sunny in the morning, becoming mostly cloudy with scattered light snow showers in the afternoon. Periods of moderate ridgeline winds.
Sunday Night Mostly cloudy with scattered light to occasionally moderate snow showers in the evening. Then mostly cloudy with light isolated snow showers after midnight. Moderate ridgeline winds.
Monday Partly sunny in the morning, becoming mostly cloudy with scattered light snow showers in the afternoon. Moderate ridgeline winds.
Sunday Night Cloudy with light to occasionally moderate snow showers. Moderate to strong ridgeline winds.
Monday Mostly cloudy with scattered light to occasionally moderate snow showers. More sunbreaks east side of the mountain. Moderate ridgeline winds.

Issued: 2:35 PM PDT Sunday, April 2, 2023

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

Issued: 2:35 PM PDT Sunday, April 2, 2023

Snow Level (ft)

Sunday Evening Sunday Night Monday Morning Monday Afternoon Monday Evening Monday Night Tuesday Morning Tuesday Afternoon
Olympics 1500' 500' 1500' 2000' 1500' 500' 1500' 3000'
West North 1500' 500' 1500' 2000' 1500' 500' 1500' 3000'
West Central 1500' 500' 1500' 2000' 1500' 500' 1500' 3000'
West South 1500' 500' 1500' 2000' 1500' 500' 1500' 3000'
Stevens Pass 1500' 500' 1500' 2000' 1500' 500' 1500' 3000'
Snoqualmie Pass 1500' 500' 1500' 2000' 1500' 500' 1500' 3000'
East North 1500' 0 1500' 3500' 1500' 0 1500' 4000'
East Central 1500' 500' 2000' 3500' 1500' 500' 1500' 3500'
East South 1500' 500' 2000' 3500' 1500' 500' 1500' 3500'
Mt. Hood 1500' 500' 1500' 2000' 1500' 500' 1500' 3000'
Olympics Elevation
Sunday Evening 1500'
Sunday Night 500'
Monday Morning 1500'
Monday Afternoon 2000'
Monday Evening 1500'
Monday Night 500'
Tuesday Morning 1500'
Tuesday Afternoon 3000'
West North Elevation
Sunday Evening 1500'
Sunday Night 500'
Monday Morning 1500'
Monday Afternoon 2000'
Monday Evening 1500'
Monday Night 500'
Tuesday Morning 1500'
Tuesday Afternoon 3000'
West Central Elevation
Sunday Evening 1500'
Sunday Night 500'
Monday Morning 1500'
Monday Afternoon 2000'
Monday Evening 1500'
Monday Night 500'
Tuesday Morning 1500'
Tuesday Afternoon 3000'
West South Elevation
Sunday Evening 1500'
Sunday Night 500'
Monday Morning 1500'
Monday Afternoon 2000'
Monday Evening 1500'
Monday Night 500'
Tuesday Morning 1500'
Tuesday Afternoon 3000'
Stevens Pass Elevation
Sunday Evening 1500'
Sunday Night 500'
Monday Morning 1500'
Monday Afternoon 2000'
Monday Evening 1500'
Monday Night 500'
Tuesday Morning 1500'
Tuesday Afternoon 3000'
Snoqualmie Pass Elevation
Sunday Evening 1500'
Sunday Night 500'
Monday Morning 1500'
Monday Afternoon 2000'
Monday Evening 1500'
Monday Night 500'
Tuesday Morning 1500'
Tuesday Afternoon 3000'
East North Elevation
Sunday Evening 1500'
Sunday Night 0'
Monday Morning 1500'
Monday Afternoon 3500'
Monday Evening 1500'
Monday Night 0'
Tuesday Morning 1500'
Tuesday Afternoon 4000'
East Central Elevation
Sunday Evening 1500'
Sunday Night 500'
Monday Morning 2000'
Monday Afternoon 3500'
Monday Evening 1500'
Monday Night 500'
Tuesday Morning 1500'
Tuesday Afternoon 3500'
East South Elevation
Sunday Evening 1500'
Sunday Night 500'
Monday Morning 2000'
Monday Afternoon 3500'
Monday Evening 1500'
Monday Night 500'
Tuesday Morning 1500'
Tuesday Afternoon 3500'
Mt. Hood Elevation
Sunday Evening 1500'
Sunday Night 500'
Monday Morning 1500'
Monday Afternoon 2000'
Monday Evening 1500'
Monday Night 500'
Tuesday Morning 1500'
Tuesday Afternoon 3000'

Issued: 2:35 PM PDT Sunday, April 2, 2023

5000' Temperatures (°F)

Sunday Night Monday
Max / Min Max / Min
Olympics 20 / 16 27 / 17
West North 22 / 17 27 / 17
West Central 22 / 17 27 / 18
West South 21 / 17 27 / 18
Stevens Pass 23 / 18 27 / 18
Snoqualmie Pass 22 / 18 27 / 18
East North 23 / 14 29 / 16
East Central 22 / 16 28 / 16
East South 21 / 16 28 / 17
Mt. Hood 20 / 17 27 / 18
Olympics 5000' Temperature Forecast
(Max / Min)
Sunday Night 20 / 16
Monday 27 / 17
West North 5000' Temperature Forecast
(Max / Min)
Sunday Night 22 / 17
Monday 27 / 17
West Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 22 / 17
Monday 27 / 18
West South 5000' Temperature Forecast
(Max / Min)
Sunday Night 21 / 17
Monday 27 / 18
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 23 / 18
Monday 27 / 18
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 22 / 18
Monday 27 / 18
East North 5000' Temperature Forecast
(Max / Min)
Sunday Night 23 / 14
Monday 29 / 16
East Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 22 / 16
Monday 28 / 16
East South 5000' Temperature Forecast
(Max / Min)
Sunday Night 21 / 16
Monday 28 / 17
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Sunday Night 20 / 17
Monday 27 / 18

Issued: 2:35 PM PDT Sunday, April 2, 2023

Ridgeline Winds (mph)

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

Issued: 2:35 PM PDT Sunday, April 2, 2023

Extended Weather Synopsis

Wednesday looks mostly dry as upper level ridging builds over western WA and OR. However, this will likely be a dirty ridge with plenty of cloud cover sneaking in from the west as a frontal system approaches the coast. Temperatures and freezing levels will moderate on Wednesday. Forecast models aren't in lock step for Thursday and beyond, but we'll likely shift to a milder and potentially wet pattern towards the end of the week.  

Extended Snow Level (ft)

Tuesday Night Wednesday Wednesday Night* Thursday *
West North 1000' 3500' 3500' 3500'
Snoqualmie Pass 1000' 3500' 3500' 4000'
Mt. Hood 1500' 4000' 4500' 5000'
West North Elevation
Tuesday Night 1000'
Wednesday 3500'
Wednesday Night* 3500'
Thursday * 3500'
Snoqualmie Pass Elevation
Tuesday Night 1000'
Wednesday 3500'
Wednesday Night* 3500'
Thursday * 4000'
Mt. Hood Elevation
Tuesday Night 1500'
Wednesday 4000'
Wednesday Night* 4500'
Thursday * 5000'

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

Previous forecast from Apr 2, 2023

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’.