Issued: 1:47 PM PST Tuesday, November 16, 2021
by Dallas Glass

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

Weather Synopsis

A few lingering showers remain in the mountains on Tuesday afternoon, bringing isolated snow to locations in the central Washington Cascades. A few of these stray showers may persist into the early evening hours, however, the general trend is for drying and clearing. A high-pressure ridge will become the primary weather feature for the Pacific Northwest. Partly to mostly clear skies, light winds, and cold temperatures should prevail Tuesday night as the ridge moves over the area. As the high-pressure shifts into central Washington on Wednesday, expect easterly winds to increase along the Cascade crest and in the Passes. Some of these areas could experience locally moderate to strong easterly winds. As the high-pressure gives way Wednesday afternoon and evening, winds should decrease along the crest and clouds will thicken and lower ahead of an approaching frontal system. 

A low-pressure center off the coast will continue to push clouds into the region Wednesday night, however, the precipitation should hold off until mid to late day on Thursday. As the storm approaches the region it seems to weaken and loose steam. Warmer air and showers will spread from SW to NE as a warm front lifts northward from Oregon into Washington. Right now, this doesn't appear to be a particularly wet system. The bulk of the storm should impact the area Thursday night into early Friday morning. 

 

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 Night Mostly clear. Light and variable winds.
Wednesday Partly sunny. Light winds becoming southerly.
Tuesday Night Mostly clear. Light and variable winds.
Wednesday Partly cloudy. Light winds becoming SSE.
Tuesday Night Partly cloudy with a stray shower possible in the early evening. Light winds becoming easterly.
Wednesday Partly cloudy. Light SE winds.
Tuesday Night Partly cloudy. A few flurries possible in the early evening. Light winds becoming easterly.
Wednesday Partly cloudy to mostly sunny. Easterly winds increasing, particularly near the Cascade Crest.
Tuesday Night Partly to mostly cloudy with a stray shower possible in the early evening. East flow developing in the Pass overnight.
Wednesday Partly cloudy. Light to moderate easterly winds increasing during the day.
Tuesday Night Partly cloudy. East flow developing in the Pass overnight.
Wednesday Partly cloudy. Easterly winds increasing and becoming moderate to strong in the afternoon.
Tuesday Night Mostly clear. Winds decreasing and becoming light and variable.
Wednesday Mostly clear with increasing clouds. Light to moderate SSE winds.
Tuesday Night Mostly clear. Moderate winds becoming light and variable.
Wednesday Mostly clear with increasing clouds. Light SE winds becoming moderate in the afternoon.
Tuesday Night Mostly clear. Moderate winds decreasing and becoming easterly.
Wednesday Mostly clear with increasing cloudys. Southeasterly winds increasing and becoming moderate.
Tuesday Night Partly cloudy. Moderate winds becoming northeasterly.
Wednesday Partly cloudy. Moderate winds becoming more southerly.

Precipitation (in)

Tuesday Night Wednesday Wednesday Night Thursday
4 pm - 4 am 4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge 0 0 0 0.25
Mt Baker Ski Area 0 0 0 LT 0.25
Mt. Loop - Barlow Pass 0 0 0 LT 0.25
Stevens Pass 0 0 0 LT 0.10
Snoqualmie Pass 0 0 0 LT 0.10
Crystal Mt 0 0 0 LT 0.10
Paradise 0 0 0 LT 0.25
White Pass 0 0 0 LT 0.10
Washington Pass 0 0 0 LT 0.10
Mission Ridge 0 0 0 LT 0.10
Salmon la Sac - Gallagher Head 0 0 0 LT 0.10
Tieton River - Darland Mt. 0 0 0 LT 0.10
Mt Hood Meadows 0 0 0 LT 0.25
Timberline 0 0 0 LT 0.25
Hurricane Ridge Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday 0.25
Mt Baker Ski Area Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.25
Mt. Loop - Barlow Pass Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.25
Stevens Pass Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.10
Snoqualmie Pass Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.10
Crystal Mt Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.10
Paradise Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.25
White Pass Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.10
Washington Pass Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.10
Mission Ridge Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.10
Salmon la Sac - Gallagher Head Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.10
Tieton River - Darland Mt. Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.10
Mt Hood Meadows Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.25
Timberline Precipitation (in)
Tuesday Night 0
Wednesday 0
Wednesday Night 0
Thursday LT 0.25

Snow Level (ft)

Tuesday Evening Tuesday Night* Wednesday Morning* Wednesday Afternoon* Wednesday Evening* Wednesday Night* Thursday Morning* Thursday Afternoon*
Olympics 2000' 1500' 2000' 4000' 3500' 3500' 3000' 3000'
West North 1500' 500' 1000' 3500' 2000' 1500' 2500' 3500'
West Central 1500' 500' 1000' 3500' 2000' 1500' 2500' 3500'
West South 2000' 1000' 2000' 4000' 2000' 2000' 4000' 4500'
Stevens Pass 1000' 500' 1000' 3000' 1500' 1000' 2000' 3500'
Snoqualmie Pass 1000' 500' 1000' 3500' 1500' 1500' 2500' 3500'
East North 500' 500' 1000' 2500' 1000' 500' 1500' 3000'
East Central 1000' 500' 1000' 3000' 1500' 1500' 2500' 3000'
East South 1500' 1000' 1500' 4000' 1500' 2000' 3000' 4500'
Mt. Hood 2500' 2000' 2500' 3500' 2500' 3000' 4000' 4500'
Olympics Elevation
Tuesday Evening 2000'
Tuesday Night* 1500'
Wednesday Morning* 2000'
Wednesday Afternoon* 4000'
Wednesday Evening* 3500'
Wednesday Night* 3500'
Thursday Morning* 3000'
Thursday Afternoon* 3000'
West North Elevation
Tuesday Evening 1500'
Tuesday Night* 500'
Wednesday Morning* 1000'
Wednesday Afternoon* 3500'
Wednesday Evening* 2000'
Wednesday Night* 1500'
Thursday Morning* 2500'
Thursday Afternoon* 3500'
West Central Elevation
Tuesday Evening 1500'
Tuesday Night* 500'
Wednesday Morning* 1000'
Wednesday Afternoon* 3500'
Wednesday Evening* 2000'
Wednesday Night* 1500'
Thursday Morning* 2500'
Thursday Afternoon* 3500'
West South Elevation
Tuesday Evening 2000'
Tuesday Night* 1000'
Wednesday Morning* 2000'
Wednesday Afternoon* 4000'
Wednesday Evening* 2000'
Wednesday Night* 2000'
Thursday Morning* 4000'
Thursday Afternoon* 4500'
Stevens Pass Elevation
Tuesday Evening 1000'
Tuesday Night* 500'
Wednesday Morning* 1000'
Wednesday Afternoon* 3000'
Wednesday Evening* 1500'
Wednesday Night* 1000'
Thursday Morning* 2000'
Thursday Afternoon* 3500'
Snoqualmie Pass Elevation
Tuesday Evening 1000'
Tuesday Night* 500'
Wednesday Morning* 1000'
Wednesday Afternoon* 3500'
Wednesday Evening* 1500'
Wednesday Night* 1500'
Thursday Morning* 2500'
Thursday Afternoon* 3500'
East North Elevation
Tuesday Evening 500'
Tuesday Night* 500'
Wednesday Morning* 1000'
Wednesday Afternoon* 2500'
Wednesday Evening* 1000'
Wednesday Night* 500'
Thursday Morning* 1500'
Thursday Afternoon* 3000'
East Central Elevation
Tuesday Evening 1000'
Tuesday Night* 500'
Wednesday Morning* 1000'
Wednesday Afternoon* 3000'
Wednesday Evening* 1500'
Wednesday Night* 1500'
Thursday Morning* 2500'
Thursday Afternoon* 3000'
East South Elevation
Tuesday Evening 1500'
Tuesday Night* 1000'
Wednesday Morning* 1500'
Wednesday Afternoon* 4000'
Wednesday Evening* 1500'
Wednesday Night* 2000'
Thursday Morning* 3000'
Thursday Afternoon* 4500'
Mt. Hood Elevation
Tuesday Evening 2500'
Tuesday Night* 2000'
Wednesday Morning* 2500'
Wednesday Afternoon* 3500'
Wednesday Evening* 2500'
Wednesday Night* 3000'
Thursday Morning* 4000'
Thursday Afternoon* 4500'

5000' Temperatures (°F)

Tuesday Night Wednesday
Max / Min Max / Min
Olympics 20 / 16 35 / 21
West North 18 / 16 30 / 18
West Central 18 / 14 27 / 18
West South 22 / 16 31 / 18
Stevens Pass 20 / 14 25 / 15
Snoqualmie Pass 22 / 14 24 / 15
East North 17 / 13 22 / 13
East Central 17 / 15 24 / 14
East South 21 / 16 27 / 16
Mt. Hood 23 / 19 30 / 22
Olympics 5000' Temperature Forecast
(Max / Min)
Tuesday Night 20 / 16
Wednesday 35 / 21
West North 5000' Temperature Forecast
(Max / Min)
Tuesday Night 18 / 16
Wednesday 30 / 18
West Central 5000' Temperature Forecast
(Max / Min)
Tuesday Night 18 / 14
Wednesday 27 / 18
West South 5000' Temperature Forecast
(Max / Min)
Tuesday Night 22 / 16
Wednesday 31 / 18
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Tuesday Night 20 / 14
Wednesday 25 / 15
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Tuesday Night 22 / 14
Wednesday 24 / 15
East North 5000' Temperature Forecast
(Max / Min)
Tuesday Night 17 / 13
Wednesday 22 / 13
East Central 5000' Temperature Forecast
(Max / Min)
Tuesday Night 17 / 15
Wednesday 24 / 14
East South 5000' Temperature Forecast
(Max / Min)
Tuesday Night 21 / 16
Wednesday 27 / 16
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Tuesday Night 23 / 19
Wednesday 30 / 22

Ridgeline Winds (mph)

Tuesday Evening Tuesday Night Wednesday Morning Wednesday Afternoon
Olympics VAR 0-10 NE 0-10 ESE 5-15 S 5-15
West North VAR 0-10 VAR 0-10 SSE 5-15 SSE 5-15
West Central N 5-15 E 5-15 SE 5-15 SE 5-15
West South NNW 5-15 E 5-15 ESE 10-20 ESE 15-25
Stevens Pass VAR 0-10 ESE 5-15 ESE 10-20 ESE 15-25
Snoqualmie Pass NNW 5-15 ESE 5-15 ESE 10-20 ESE 20-30
East North N 5-15 VAR 0-10 SSE 5-15 SSE 10-20
East Central NNW 10-20 VAR 0-10 ESE 10-20 SSE 15-25
East South NNW 10-20 ENE 5-15 SE 10-20 SSE 15-25
Mt. Hood NNW 10-20 ENE 10-20 SE 15-25 S 15-25
Olympics Ridgeline Winds (mph)
Tuesday Evening VAR 0-10
Tuesday Night NE 0-10
Wednesday Morning ESE 5-15
Wednesday Afternoon S 5-15
West North Ridgeline Winds (mph)
Tuesday Evening VAR 0-10
Tuesday Night VAR 0-10
Wednesday Morning SSE 5-15
Wednesday Afternoon SSE 5-15
West Central Ridgeline Winds (mph)
Tuesday Evening N 5-15
Tuesday Night E 5-15
Wednesday Morning SE 5-15
Wednesday Afternoon SE 5-15
West South Ridgeline Winds (mph)
Tuesday Evening NNW 5-15
Tuesday Night E 5-15
Wednesday Morning ESE 10-20
Wednesday Afternoon ESE 15-25
Stevens Pass Ridgeline Winds (mph)
Tuesday Evening VAR 0-10
Tuesday Night ESE 5-15
Wednesday Morning ESE 10-20
Wednesday Afternoon ESE 15-25
Snoqualmie Pass Ridgeline Winds (mph)
Tuesday Evening NNW 5-15
Tuesday Night ESE 5-15
Wednesday Morning ESE 10-20
Wednesday Afternoon ESE 20-30
East North Ridgeline Winds (mph)
Tuesday Evening N 5-15
Tuesday Night VAR 0-10
Wednesday Morning SSE 5-15
Wednesday Afternoon SSE 10-20
East Central Ridgeline Winds (mph)
Tuesday Evening NNW 10-20
Tuesday Night VAR 0-10
Wednesday Morning ESE 10-20
Wednesday Afternoon SSE 15-25
East South Ridgeline Winds (mph)
Tuesday Evening NNW 10-20
Tuesday Night ENE 5-15
Wednesday Morning SE 10-20
Wednesday Afternoon SSE 15-25
Mt. Hood Ridgeline Winds (mph)
Tuesday Evening NNW 10-20
Tuesday Night ENE 10-20
Wednesday Morning SE 15-25
Wednesday Afternoon S 15-25

Extended Weather Synopsis

As the low-pressure system heads towards California, the mountains should experience drying and clearing from north to south. A few showers may linger into Friday morning, but by Friday afternoon any precipitation should be limited to locations near Mt Hood. A high-pressure ridge should help the mountains dry out and the skies clear up for the weekend. Look for warming temperatures and mostly sunny skies on Saturday. 

 

Extended Snow Level (ft)

Thursday Night* Friday * Friday Night Saturday
West North 3000' 3000' 1000' 2500'
Snoqualmie Pass 3000' 3500' 1500' 3000'
Mt. Hood 5500' 6000' 2500' 3500'
West North Elevation
Thursday Night* 3000'
Friday * 3000'
Friday Night 1000'
Saturday 2500'
Snoqualmie Pass Elevation
Thursday Night* 3000'
Friday * 3500'
Friday Night 1500'
Saturday 3000'
Mt. Hood Elevation
Thursday Night* 5500'
Friday * 6000'
Friday Night 2500'
Saturday 3500'

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

Previous forecast from Nov 15, 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