Issued: 2:03 PM PST Friday, November 19, 2021
by Robert Hahn

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

Weather Synopsis

Quiet weather should give the region some time to dry out in the short-term. Some low clouds remain banked against the west slopes of the Cascades as WNW flow continues behind a departed storm system through Saturday. A very weak disturbance in the early morning hours Saturday could touch off a few flurries in the North Cascades. Temperatures start the weekend slightly below seasonal norms west of the Cascade Crest and near seasonal norms with downslope flow further east.
 
An expanding high pressure brings a retreat in cloud cover and a warming trend late Saturday through Sunday. Cool air will remain entrenched east of the Cascades Saturday night as low-level E flow develops. However, temperatures warm quickly under filtered sunshine on Sunday. The region will experience high temperatures up to 5-25F above normal and freezing levels rising to 6,000-11,000 ft.

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
Friday Night Increasing partial low cloud cover.
Saturday Partly cloudy with some filtered sunshine.
Friday Night Partly cloudy.
Saturday Partly cloudy with some filtered sunshine.
Friday Night
Saturday Mostly cloudy with a chance of snow flurries.
Friday Night Partly cloudy.
Saturday Partly cloudy with some filtered sunshine.
Friday Night Partly cloudy. Light W wind at the Pass.
Saturday Partly cloudy with some filtered sunshine. Light W wind at the Pass.
Friday Night Partly cloudy. Light W wind at the Pass.
Saturday Partly cloudy with some filtered sunshine. Light W wind at the Pass.
Friday Night A few clouds.
Saturday Partly cloudy with some filtered sunshine.
Friday Night Mostly clear.
Saturday Partly cloudy with some filtered sunshine.
Friday Night Mostly clear.
Saturday Mostly sunny with filtered sunshine at times.
Friday Night Mostly cloudy in the evening with decreasing clouds.
Saturday Mostly sunny.

Precipitation (in)

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

Snow Level (ft)

Friday Evening Friday Night Saturday Morning Saturday Afternoon Saturday Evening* Saturday Night* Sunday Morning* Sunday Afternoon*
Olympics 3500' 2500' 2500' 4000' 3500' 3500' 5000' 1000'
West North 3500' 2000' 2500' 3500' 3000' 2500' 2500' 7500'
West Central 3000' 2000' 3000' 3500' 3000' 2500' 3000' 9000'
West South 3500' 3000' 3000' 4000' 3000' 3500' 4500' 10000'
Stevens Pass 2500' 2500' 2500' 3500' 3000' 2000' 3000' 9000'
Snoqualmie Pass 2500' 3000' 3000' 3500' 3000' 2000' 3000' 9000'
East North 2500' 2000' 2000' 3500' 3000' 2000' 2000' 6500'
East Central 3000' 2000' 2000' 3500' 3000' 2500' 3000' 7500'
East South 4000' 3000' 2500' 4000' 3000' 3000' 4000' 10500'
Mt. Hood 4000' 4000' 3500' 5000' 6000' 6500' 7500' 11000'
Olympics Elevation
Friday Evening 3500'
Friday Night 2500'
Saturday Morning 2500'
Saturday Afternoon 4000'
Saturday Evening* 3500'
Saturday Night* 3500'
Sunday Morning* 5000'
Sunday Afternoon* 1000'
West North Elevation
Friday Evening 3500'
Friday Night 2000'
Saturday Morning 2500'
Saturday Afternoon 3500'
Saturday Evening* 3000'
Saturday Night* 2500'
Sunday Morning* 2500'
Sunday Afternoon* 7500'
West Central Elevation
Friday Evening 3000'
Friday Night 2000'
Saturday Morning 3000'
Saturday Afternoon 3500'
Saturday Evening* 3000'
Saturday Night* 2500'
Sunday Morning* 3000'
Sunday Afternoon* 9000'
West South Elevation
Friday Evening 3500'
Friday Night 3000'
Saturday Morning 3000'
Saturday Afternoon 4000'
Saturday Evening* 3000'
Saturday Night* 3500'
Sunday Morning* 4500'
Sunday Afternoon* 10000'
Stevens Pass Elevation
Friday Evening 2500'
Friday Night 2500'
Saturday Morning 2500'
Saturday Afternoon 3500'
Saturday Evening* 3000'
Saturday Night* 2000'
Sunday Morning* 3000'
Sunday Afternoon* 9000'
Snoqualmie Pass Elevation
Friday Evening 2500'
Friday Night 3000'
Saturday Morning 3000'
Saturday Afternoon 3500'
Saturday Evening* 3000'
Saturday Night* 2000'
Sunday Morning* 3000'
Sunday Afternoon* 9000'
East North Elevation
Friday Evening 2500'
Friday Night 2000'
Saturday Morning 2000'
Saturday Afternoon 3500'
Saturday Evening* 3000'
Saturday Night* 2000'
Sunday Morning* 2000'
Sunday Afternoon* 6500'
East Central Elevation
Friday Evening 3000'
Friday Night 2000'
Saturday Morning 2000'
Saturday Afternoon 3500'
Saturday Evening* 3000'
Saturday Night* 2500'
Sunday Morning* 3000'
Sunday Afternoon* 7500'
East South Elevation
Friday Evening 4000'
Friday Night 3000'
Saturday Morning 2500'
Saturday Afternoon 4000'
Saturday Evening* 3000'
Saturday Night* 3000'
Sunday Morning* 4000'
Sunday Afternoon* 10500'
Mt. Hood Elevation
Friday Evening 4000'
Friday Night 4000'
Saturday Morning 3500'
Saturday Afternoon 5000'
Saturday Evening* 6000'
Saturday Night* 6500'
Sunday Morning* 7500'
Sunday Afternoon* 11000'

5000' Temperatures (°F)

Friday Night Saturday
Max / Min Max / Min
Olympics 24 / 21 29 / 20
West North 24 / 20 26 / 20
West Central 23 / 17 27 / 22
West South 24 / 21 33 / 20
Stevens Pass 23 / 18 29 / 22
Snoqualmie Pass 22 / 17 29 / 22
East North 25 / 19 31 / 19
East Central 24 / 21 32 / 21
East South 25 / 23 37 / 23
Mt. Hood 27 / 26 36 / 25
Olympics 5000' Temperature Forecast
(Max / Min)
Friday Night 24 / 21
Saturday 29 / 20
West North 5000' Temperature Forecast
(Max / Min)
Friday Night 24 / 20
Saturday 26 / 20
West Central 5000' Temperature Forecast
(Max / Min)
Friday Night 23 / 17
Saturday 27 / 22
West South 5000' Temperature Forecast
(Max / Min)
Friday Night 24 / 21
Saturday 33 / 20
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Friday Night 23 / 18
Saturday 29 / 22
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Friday Night 22 / 17
Saturday 29 / 22
East North 5000' Temperature Forecast
(Max / Min)
Friday Night 25 / 19
Saturday 31 / 19
East Central 5000' Temperature Forecast
(Max / Min)
Friday Night 24 / 21
Saturday 32 / 21
East South 5000' Temperature Forecast
(Max / Min)
Friday Night 25 / 23
Saturday 37 / 23
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Friday Night 27 / 26
Saturday 36 / 25

Ridgeline Winds (mph)

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

Extended Weather Synopsis

Dry weather persists through Monday as the ridge shifts eastward. However, a quick-moving weak system arrives Monday night or Tuesday and brings a return to more active weather. Temperatures should return to slightly below seasonal norms through the middle of the week. Models indicate the potential for warmer and wetter weather later in the week.

Extended Snow Level (ft)

Sunday Night* Monday * Monday Night* Tuesday *
West North 6000' 6000' 4500' 2500'
Snoqualmie Pass 6000' 6500' 2500' 3000'
Mt. Hood 11500' 10500' 6000' 5000'
West North Elevation
Sunday Night* 6000'
Monday * 6000'
Monday Night* 4500'
Tuesday * 2500'
Snoqualmie Pass Elevation
Sunday Night* 6000'
Monday * 6500'
Monday Night* 2500'
Tuesday * 3000'
Mt. Hood Elevation
Sunday Night* 11500'
Monday * 10500'
Monday Night* 6000'
Tuesday * 5000'

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

Previous forecast from Nov 18, 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