Issued: 7:00 AM PDT Tuesday, April 6, 2021
by Dennis D'Amico

Jump to: Weather Forecast I Snow Level I Precipitation I Ridgeline Winds I

Weather Synopsis

We're in for a warm spring day across the Pacific Northwest. Overnight lows were near or in some locations even above freezing. Mountain temperatures will quickly bump into the 40s with even a few 50s this afternoon for areas further south. The exception will be over the Olympics and north Cascades where increasing high clouds should put a damper on full sunshine in the afternoon. Generally light winds are expected today as well with a slight uptick in the afternoon. Weak ridging over the area today will give way to increasing high clouds tonight for all of Washington State from an advancing frontal system.   

Light rain and snow should begin for Mt Baker and over the Olympics before daybreak on Wednesday and slowly spread south during the day.  Precipitation should become moderate for the West North zone in the afternoon. Snow levels will quickly fall into the 3000-4000' range with the onset of precipitation. The far southern Washington Cascades and Mt Hood will have to wait until Wednesday evening for the front to arrive. W-SW ridgeline winds will increase tonight and continue during the day on Wednesday as the frontal system moves in from the Northwest.  

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
Tuesday Mostly sunny in the morning becoming partly cloudy with increasing high clouds and filtered sunshine in the afternoon.
Tuesday Night Cloudy.
Tuesday Mostly sunny in the morning becoming partly to mostly cloudy with increasing high clouds and filtered sunshine in the afternoon.
Tuesday Night Cloudy.
Tuesday Mostly sunny in the morning becoming partly sunny with increasing high clouds and filtered sunshine late in the afternoon.
Tuesday Night Partly to mostly cloudy with increasing high clouds overnight.
Tuesday Mostly sunny. Periods of high clouds and filtered sunshine in the afternoon.
Tuesday Night Partly cloudy with increasing high clouds overnight.
Tuesday Mostly sunny in the morning becoming partly sunny with increasing high clouds and filtered sunshine late in the afternoon.
Tuesday Night Mostly cloudy with increasing high clouds overnight.
Tuesday Mostly sunny. Periods of high clouds and filtered sunshine in the afternoon.
Tuesday Night Partly cloudy with increasing high clouds overnight.
Tuesday Mostly sunny in the morning becoming partly to mostly cloudy with increasing high clouds and filtered sunshine in the afternoon.
Tuesday Night Mostly cloudy with increasing high clouds overnight.
Tuesday Mostly sunny. Periods of high clouds and filtered sunshine in the afternoon.
Tuesday Night Partly cloudy with increasing high clouds overnight.
Tuesday Mostly sunny.
Tuesday Night Partly cloudy with increasing high clouds overnight.
Tuesday Mostly sunny.
Tuesday Night Mostly clear with periods of high clouds.

Precipitation (in)

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

Snow Level (ft)

Tuesday Morning Tuesday Afternoon Tuesday Evening Tuesday Night Wednesday Morning Wednesday Afternoon
Olympics 5500' 7000' 7000' 4500' 3500' 3500'
West North 4000' 6000' 6000' 5000' 3500' 3500'
West Central 4500' 7000' 7000' 5000' 4000' 4000'
West South 6500' 7500' 7500' 6000' 5000' 4500'
Stevens Pass 4500' 7000' 7000' 5000' 4500' 4000'
Snoqualmie Pass 4500' 7000' 7000' 5000' 4500' 4000'
East North 5000' 7500' 7500' 6000' 5500' 5000'
East Central 5500' 7500' 7500' 7000' 5500' 5000'
East South 6000' 8000' 8000' 7000' 6000' 5000'
Mt. Hood 8000' 9000' 9000' 8000' 7000' 5500'
Olympics Elevation
Tuesday Morning 5500'
Tuesday Afternoon 7000'
Tuesday Evening 7000'
Tuesday Night 4500'
Wednesday Morning 3500'
Wednesday Afternoon 3500'
West North Elevation
Tuesday Morning 4000'
Tuesday Afternoon 6000'
Tuesday Evening 6000'
Tuesday Night 5000'
Wednesday Morning 3500'
Wednesday Afternoon 3500'
West Central Elevation
Tuesday Morning 4500'
Tuesday Afternoon 7000'
Tuesday Evening 7000'
Tuesday Night 5000'
Wednesday Morning 4000'
Wednesday Afternoon 4000'
West South Elevation
Tuesday Morning 6500'
Tuesday Afternoon 7500'
Tuesday Evening 7500'
Tuesday Night 6000'
Wednesday Morning 5000'
Wednesday Afternoon 4500'
Stevens Pass Elevation
Tuesday Morning 4500'
Tuesday Afternoon 7000'
Tuesday Evening 7000'
Tuesday Night 5000'
Wednesday Morning 4500'
Wednesday Afternoon 4000'
Snoqualmie Pass Elevation
Tuesday Morning 4500'
Tuesday Afternoon 7000'
Tuesday Evening 7000'
Tuesday Night 5000'
Wednesday Morning 4500'
Wednesday Afternoon 4000'
East North Elevation
Tuesday Morning 5000'
Tuesday Afternoon 7500'
Tuesday Evening 7500'
Tuesday Night 6000'
Wednesday Morning 5500'
Wednesday Afternoon 5000'
East Central Elevation
Tuesday Morning 5500'
Tuesday Afternoon 7500'
Tuesday Evening 7500'
Tuesday Night 7000'
Wednesday Morning 5500'
Wednesday Afternoon 5000'
East South Elevation
Tuesday Morning 6000'
Tuesday Afternoon 8000'
Tuesday Evening 8000'
Tuesday Night 7000'
Wednesday Morning 6000'
Wednesday Afternoon 5000'
Mt. Hood Elevation
Tuesday Morning 8000'
Tuesday Afternoon 9000'
Tuesday Evening 9000'
Tuesday Night 8000'
Wednesday Morning 7000'
Wednesday Afternoon 5500'

5000' Temperatures (°F)

Tuesday Tuesday Night
Max / Min Max / Min
Olympics 42 / 30 37 / 28
West North 40 / 29 36 / 28
West Central 42 / 28 37 / 28
West South 45 / 30 41 / 30
Stevens Pass 44 / 28 40 / 29
Snoqualmie Pass 42 / 29 37 / 28
East North 45 / 29 40 / 32
East Central 45 / 30 42 / 30
East South 49 / 31 45 / 32
Mt. Hood 50 / 31 46 / 33
Olympics 5000' Temperature Forecast
(Max / Min)
Tuesday 5am - 5pm 42 / 30
Tuesday 5pm - 5am 37 / 28
West North 5000' Temperature Forecast
(Max / Min)
Tuesday 5am - 5pm 40 / 29
Tuesday 5pm - 5am 36 / 28
West Central 5000' Temperature Forecast
(Max / Min)
Tuesday 5am - 5pm 42 / 28
Tuesday 5pm - 5am 37 / 28
West South 5000' Temperature Forecast
(Max / Min)
Tuesday 5am - 5pm 45 / 30
Tuesday 5pm - 5am 41 / 30
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Tuesday 5am - 5pm 44 / 28
Tuesday 5pm - 5am 40 / 29
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Tuesday 5am - 5pm 42 / 29
Tuesday 5pm - 5am 37 / 28
East North 5000' Temperature Forecast
(Max / Min)
Tuesday 5am - 5pm 45 / 29
Tuesday 5pm - 5am 40 / 32
East Central 5000' Temperature Forecast
(Max / Min)
Tuesday 5am - 5pm 45 / 30
Tuesday 5pm - 5am 42 / 30
East South 5000' Temperature Forecast
(Max / Min)
Tuesday 5am - 5pm 49 / 31
Tuesday 5pm - 5am 45 / 32
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Tuesday 5am - 5pm 50 / 31
Tuesday 5pm - 5am 46 / 33

Ridgeline Winds (mph)

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

Jump to: Weather Forecast I Snow Level I Precipitation I Ridgeline Winds I

Previous forecast from Apr 5, 2021

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’.

Updated Mountain Weather Zone Name Changes – December 2020