Issued: 7:00 AM PDT Monday, April 5, 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 quiet start to the week weather-wise. The upper low that brought a few inches of snow on Sunday to the Washington Cascades will slide toward the intermountain West this afternoon as weak upper level ridging builds over the PNW. There are a few clouds in the 4000-7000' range but otherwise mostly sunny skies are expected today. After a cold start to the morning with mountain temperatures in the mid teens to 20s, temperatures and freezing levels will rebound nicely into the 5500-6500' range across the region this afternoon. A stiff N-NW breeze can be found at ridgeline level along the Cascade crest and down to Mt Hood this morning as well. 

The weak upper-level ridge will slowly shift into eastern WA/OR tonight and tomorrow. This will keep dry conditions in place over the short term. A frontal system upstream along the central B.C. coast will spread a few high clouds into the area during the day tomorrow.  

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 Mostly sunny. A few low clouds in the morning.
Monday Night Mostly clear.
Monday Mostly sunny. A few low clouds in the morning.
Monday Night Mostly clear.
Monday Mostly sunny. A few low clouds in the morning.
Monday Night Mostly clear.
Monday Mostly sunny. A few low clouds in the morning.
Monday Night Mostly clear.
Monday Mostly sunny. A few low clouds in the morning.
Monday Night Mostly clear.
Monday Mostly sunny. A few low clouds in the morning.
Monday Night Mostly clear.
Monday Mostly sunny. A few low clouds in the morning.
Monday Night Mostly clear.
Monday Mostly sunny. A few low clouds in the morning.
Monday Night Mostly clear.
Monday Mostly sunny. A few low clouds in the morning.
Monday Night Mostly clear.
Monday Mostly sunny. A few low clouds in the morning. Moderate to strong winds in the morning decreasing in the afternoon.
Monday Night Mostly clear.

Precipitation (in)

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

Snow Level (ft)

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

5000' Temperatures (°F)

Monday Monday Night
Max / Min Max / Min
Olympics 37 / 25 33 / 29
West North 36 / 24 32 / 26
West Central 36 / 24 32 / 28
West South 38 / 24 32 / 27
Stevens Pass 38 / 24 32 / 27
Snoqualmie Pass 36 / 24 32 / 27
East North 40 / 22 31 / 26
East Central 41 / 24 32 / 28
East South 41 / 24 32 / 28
Mt. Hood 41 / 24 34 / 31
Olympics 5000' Temperature Forecast
(Max / Min)
Monday 5am - 5pm 37 / 25
Monday 5pm - 5am 33 / 29
West North 5000' Temperature Forecast
(Max / Min)
Monday 5am - 5pm 36 / 24
Monday 5pm - 5am 32 / 26
West Central 5000' Temperature Forecast
(Max / Min)
Monday 5am - 5pm 36 / 24
Monday 5pm - 5am 32 / 28
West South 5000' Temperature Forecast
(Max / Min)
Monday 5am - 5pm 38 / 24
Monday 5pm - 5am 32 / 27
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Monday 5am - 5pm 38 / 24
Monday 5pm - 5am 32 / 27
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Monday 5am - 5pm 36 / 24
Monday 5pm - 5am 32 / 27
East North 5000' Temperature Forecast
(Max / Min)
Monday 5am - 5pm 40 / 22
Monday 5pm - 5am 31 / 26
East Central 5000' Temperature Forecast
(Max / Min)
Monday 5am - 5pm 41 / 24
Monday 5pm - 5am 32 / 28
East South 5000' Temperature Forecast
(Max / Min)
Monday 5am - 5pm 41 / 24
Monday 5pm - 5am 32 / 28
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Monday 5am - 5pm 41 / 24
Monday 5pm - 5am 34 / 31

Ridgeline Winds (mph)

Monday Morning Monday Afternoon Monday Evening Monday Night
Olympics NW 0-10 NW 0-10 N 0-10 W 5-15
West North N 40-55 W 0-10 W 0-10 W 5-15
West Central NW 10-20 NW 5-15 NW 5-15 WNW 5-15
West South NW 10-20 NW 5-15 NW 5-15 WNW 5-15
Stevens Pass NW 5-15 NW 5-15 NW 5-15 WNW 5-15
Snoqualmie Pass NW 10-20 NW 10-20 NW 10-20 WNW 5-15
East North NNW 20-30 NNW 15-25 NNW 10-20 WNW 0-10
East Central NNW 10-20 NNW 10-20 W 5-15 WNW 5-15
East South N 10-20 N 5-15 W 5-15 WNW 5-15
Mt. Hood NE 10-20 NW 5-15 NW 5-15 WNW 5-15
Olympics Ridgeline Winds (mph)
Monday Morning NW 0-10
Monday Afternoon NW 0-10
Monday Evening N 0-10
Monday Night W 5-15
West North Ridgeline Winds (mph)
Monday Morning N 40-55
Monday Afternoon W 0-10
Monday Evening W 0-10
Monday Night W 5-15
West Central Ridgeline Winds (mph)
Monday Morning NW 10-20
Monday Afternoon NW 5-15
Monday Evening NW 5-15
Monday Night WNW 5-15
West South Ridgeline Winds (mph)
Monday Morning NW 10-20
Monday Afternoon NW 5-15
Monday Evening NW 5-15
Monday Night WNW 5-15
Stevens Pass Ridgeline Winds (mph)
Monday Morning NW 5-15
Monday Afternoon NW 5-15
Monday Evening NW 5-15
Monday Night WNW 5-15
Snoqualmie Pass Ridgeline Winds (mph)
Monday Morning NW 10-20
Monday Afternoon NW 10-20
Monday Evening NW 10-20
Monday Night WNW 5-15
East North Ridgeline Winds (mph)
Monday Morning NNW 20-30
Monday Afternoon NNW 15-25
Monday Evening NNW 10-20
Monday Night WNW 0-10
East Central Ridgeline Winds (mph)
Monday Morning NNW 10-20
Monday Afternoon NNW 10-20
Monday Evening W 5-15
Monday Night WNW 5-15
East South Ridgeline Winds (mph)
Monday Morning N 10-20
Monday Afternoon N 5-15
Monday Evening W 5-15
Monday Night WNW 5-15
Mt. Hood Ridgeline Winds (mph)
Monday Morning NE 10-20
Monday Afternoon NW 5-15
Monday Evening NW 5-15
Monday Night WNW 5-15

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

Previous forecast from Apr 4, 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