Issued: 7:11 AM PDT Monday, March 21, 2022
by Dennis D'Amico

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

Weather Synopsis

A weak warm front will sit over the area this morning and continue light to moderate precipitation over the area before losing steam this afternoon. The highest precipitation totals are likely for Snoqualmie Pass and the Paradise area. Free air freezing levels to the west of the Cascades have already jumped up to 5500' this morning, but that milder air will take the bulk of the day to work its way into the Cascades. Cool easterly flow will also keep precipitation in the form of snow for our major Passes through the morning hours.  All that said, expect a change to rain at the major Cascade Passes by late morning for Snoqualmie, and then in the afternoon for White and Stevens. The same general warming trend will be felt across the region. 

As one warm front peters out, another one will brush the area overnight. This will be short lived as a ridge of high pressure amplifies just off our coast and shoves the moisture northward.  The ridge will also usher in even milder air overnight. Look for a mainly dry day tomorrow with high freezing levels. A drying and clearing trend will begin for southern areas in the morning and extend northward by 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
Monday Cloudy with periods of light rain and snow.
Monday Night Cloudy with periods of light rain and snow.
Monday Cloudy with light rain and snow.
Monday Night Cloudy with periods of light rain and snow.
Monday Cloudy with light to occasionally moderate rain and snow in the morning, becoming lighter in the afternoon.
Monday Night Cloudy with periods of light rain and snow.
Monday Cloudy with light to occasionally moderate rain and snow in the morning, becoming lighter in the afternoon. Heaviest precipitation Paradise area.
Monday Night Cloudy with periods of light rain and snow.
Monday Cloudy with light to occasionally moderate rain and snow in the morning, becoming lighter in the afternoon. Light east winds at Pass level becoming west in the afternoon.
Monday Night Cloudy with periods of light rain and snow. Light east winds at Pass level.
Monday Cloudy with moderate rain and snow in the morning, becoming lighter in the afternoon. Light east winds at Pass level becoming west in the afternoon.
Monday Night Cloudy with periods of light rain and snow. Light east winds at Pass level.
Monday Cloudy with periods of light rain and snow in the morning, then precipitation tapering off in the afternoon.
Monday Night Cloudy with periods of light rain and snow.
Monday Cloudy with periods of light rain and snow in the morning, then precipitation tapering off in the afternoon.
Monday Night Cloudy with periods of light rain and snow.
Monday Cloudy with periods of light rain and snow in the morning, then precipitation tapering off in the afternoon.
Monday Night Cloudy with periods of light rain and snow.
Monday Cloudy with light rain and snow.
Monday Night Cloudy with periods of light rain and snow.

Issued: 7:11 AM PDT Monday, March 21, 2022

Precipitation (in)

Monday Monday Night Tuesday
5 am - 5 pm 5 pm - 5 am 5 am - 5 pm
Hurricane Ridge LT 0.25 LT 0.10 0
Mt Baker Ski Area 0.25 LT 0.25 LT 0.10
Mt. Loop - Barlow Pass 0.50 LT 0.25 LT 0.10
Stevens Pass 0.25 - 0.50 LT 0.25 LT 0.10
Snoqualmie Pass 0.75 LT 0.25 LT 0.10
Crystal Mt 0.25 LT 0.10 0
Paradise 0.75 0.25 LT 0.10
White Pass 0.25 LT 0.10 0
Washington Pass LT 0.10 LT 0.10 0
Mission Ridge LT 0.10 LT 0.10 0
Salmon la Sac - Gallagher Head LT 0.25 LT 0.10 0
Tieton River - Darland Mt. LT 0.10 LT 0.10 0
Mt Hood Meadows 0.25 LT 0.25 0
Timberline 0.25 - 0.50 0.25 0
Hurricane Ridge Precipitation (in)
Monday LT 0.25
Monday Night LT 0.10
Tuesday 0
Mt Baker Ski Area Precipitation (in)
Monday 0.25
Monday Night LT 0.25
Tuesday LT 0.10
Mt. Loop - Barlow Pass Precipitation (in)
Monday 0.50
Monday Night LT 0.25
Tuesday LT 0.10
Stevens Pass Precipitation (in)
Monday 0.25 - 0.50
Monday Night LT 0.25
Tuesday LT 0.10
Snoqualmie Pass Precipitation (in)
Monday 0.75
Monday Night LT 0.25
Tuesday LT 0.10
Crystal Mt Precipitation (in)
Monday 0.25
Monday Night LT 0.10
Tuesday 0
Paradise Precipitation (in)
Monday 0.75
Monday Night 0.25
Tuesday LT 0.10
White Pass Precipitation (in)
Monday 0.25
Monday Night LT 0.10
Tuesday 0
Washington Pass Precipitation (in)
Monday LT 0.10
Monday Night LT 0.10
Tuesday 0
Mission Ridge Precipitation (in)
Monday LT 0.10
Monday Night LT 0.10
Tuesday 0
Salmon la Sac - Gallagher Head Precipitation (in)
Monday LT 0.25
Monday Night LT 0.10
Tuesday 0
Tieton River - Darland Mt. Precipitation (in)
Monday LT 0.10
Monday Night LT 0.10
Tuesday 0
Mt Hood Meadows Precipitation (in)
Monday 0.25
Monday Night LT 0.25
Tuesday 0
Timberline Precipitation (in)
Monday 0.25 - 0.50
Monday Night 0.25
Tuesday 0

Issued: 7:11 AM PDT Monday, March 21, 2022

Snow Level (ft)

Monday Morning* Monday Afternoon Monday Evening Monday Night Tuesday Morning Tuesday Afternoon
Olympics 4000' 6000' 7000' 8000' 8000' 9000'
West North 2500' 4000' 4500' 6000' 7000' 8000'
West Central 3000' 4000' 5500' 6500' 7500' 9000'
West South 3000' 5000' 6000' 8000' 8000' 9500'
Stevens Pass 2500' 4500' 5000' 6500' 7500' 9000'
Snoqualmie Pass 3000' 4500' 6000' 7000' 8000' 9500'
East North 2500' 5500' 5000' 4000' 5000' 7000'
East Central 3000' 5500' 5500' 6000' 7000' 9000'
East South 3000' 6000' 5500' 8000' 8000' 9500'
Mt. Hood 4000' 6500' 8500' 8500' 10000' 10000'
Olympics Elevation
Monday Morning* 4000'
Monday Afternoon 6000'
Monday Evening 7000'
Monday Night 8000'
Tuesday Morning 8000'
Tuesday Afternoon 9000'
West North Elevation
Monday Morning* 2500'
Monday Afternoon 4000'
Monday Evening 4500'
Monday Night 6000'
Tuesday Morning 7000'
Tuesday Afternoon 8000'
West Central Elevation
Monday Morning* 3000'
Monday Afternoon 4000'
Monday Evening 5500'
Monday Night 6500'
Tuesday Morning 7500'
Tuesday Afternoon 9000'
West South Elevation
Monday Morning* 3000'
Monday Afternoon 5000'
Monday Evening 6000'
Monday Night 8000'
Tuesday Morning 8000'
Tuesday Afternoon 9500'
Stevens Pass Elevation
Monday Morning* 2500'
Monday Afternoon 4500'
Monday Evening 5000'
Monday Night 6500'
Tuesday Morning 7500'
Tuesday Afternoon 9000'
Snoqualmie Pass Elevation
Monday Morning* 3000'
Monday Afternoon 4500'
Monday Evening 6000'
Monday Night 7000'
Tuesday Morning 8000'
Tuesday Afternoon 9500'
East North Elevation
Monday Morning* 2500'
Monday Afternoon 5500'
Monday Evening 5000'
Monday Night 4000'
Tuesday Morning 5000'
Tuesday Afternoon 7000'
East Central Elevation
Monday Morning* 3000'
Monday Afternoon 5500'
Monday Evening 5500'
Monday Night 6000'
Tuesday Morning 7000'
Tuesday Afternoon 9000'
East South Elevation
Monday Morning* 3000'
Monday Afternoon 6000'
Monday Evening 5500'
Monday Night 8000'
Tuesday Morning 8000'
Tuesday Afternoon 9500'
Mt. Hood Elevation
Monday Morning* 4000'
Monday Afternoon 6500'
Monday Evening 8500'
Monday Night 8500'
Tuesday Morning 10000'
Tuesday Afternoon 10000'

Issued: 7:11 AM PDT Monday, March 21, 2022

5000' Temperatures (°F)

Monday Monday Night
Max / Min Max / Min
Olympics 39 / 30 40 / 35
West North 33 / 27 35 / 32
West Central 33 / 27 36 / 33
West South 35 / 26 37 / 33
Stevens Pass 34 / 27 36 / 32
Snoqualmie Pass 34 / 26 36 / 34
East North 36 / 26 36 / 32
East Central 36 / 27 36 / 34
East South 38 / 26 37 / 33
Mt. Hood 37 / 28 39 / 36
Olympics 5000' Temperature Forecast
(Max / Min)
Monday 39 / 30
Monday Night 40 / 35
West North 5000' Temperature Forecast
(Max / Min)
Monday 33 / 27
Monday Night 35 / 32
West Central 5000' Temperature Forecast
(Max / Min)
Monday 33 / 27
Monday Night 36 / 33
West South 5000' Temperature Forecast
(Max / Min)
Monday 35 / 26
Monday Night 37 / 33
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Monday 34 / 27
Monday Night 36 / 32
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Monday 34 / 26
Monday Night 36 / 34
East North 5000' Temperature Forecast
(Max / Min)
Monday 36 / 26
Monday Night 36 / 32
East Central 5000' Temperature Forecast
(Max / Min)
Monday 36 / 27
Monday Night 36 / 34
East South 5000' Temperature Forecast
(Max / Min)
Monday 38 / 26
Monday Night 37 / 33
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Monday 37 / 28
Monday Night 39 / 36

Issued: 7:11 AM PDT Monday, March 21, 2022

Ridgeline Winds (mph)

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

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

Previous forecast from Mar 20, 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’.