Issued: 2:10 PM PST Saturday, November 23, 2024
by Robert Hahn

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

Weather Synopsis

A region of upper-level low pressure continues to churn offshore sending mostly light, but locally intense shower activity into our region on SSW flow on Saturday. Temperatures have been slowly cooling with snow levels generally hovering just above 3000 ft. The pattern doesn't change markedly Saturday night, however, an organized disturbance rotating around the offshore low should bring about a transition from disorganized showers to a band of moderate rain and snowfall. The rain/snow band reaches the coast Saturday night and spreads throughout the region Sunday morning, and reaches peak intensity during the afternoon. Expect very subtle cooling through Saturday night, with a slight warm-up during the day on Sunday. Light E winds will enable the precipitation to fall on both sides of the Cascade Crest. At this time, it looks like Paradise and Mt Baker may get about 8-14" of snow with this impule, while most other areas above 3500 ft picking up 4-8". Lower elevations will get a mix of rain and snow or wet snow.

The upper low offshore drifts southward Sunday night, but enough cold air remains aloft to keep mostly light snow shower activity going. Snow showers decrease from north to south on Monday as the low drifts further away. Sun breaks will be likely in the northern and central Cascades, particularly during the afternoon hours.

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
Saturday Night Light to occasionally moderate rain and snow showers.
Sunday Light snow showers.
Saturday Night Light rain and snow showers.
Sunday Light rain and snow showers transition to steady moderate rain and snow in the afternoon.
Saturday Night Light rain and snow showers.
Sunday Light rain and snow showers transition to steady moderate rain and snow in the afternoon.
Saturday Night Increasing light rain and snow showers.
Sunday Moderate rain and snow, heaviest at Paradise.
Saturday Night Very light rain and snow showers. Light ridgeline and W wind at the Pass shift east overnight.
Sunday Increasing light snow showers. Increasing light to moderate ridgeline and E wind at the Pass.
Saturday Night Very light rain and snow showers. Light ridgeline and W wind at the Pass shift east overnight.
Sunday Increasing light snow showers. Increasing light to moderate ridgeline and E wind at the Pass.
Saturday Night A few flurries or snow showers in the evening, then becoming partly cloudy.
Sunday Light snow develops in the morning and may become moderate in the afternoon. Increasing light to moderate ridgeline winds.
Saturday Night A few snow showers with partly to mostly cloudy skies.
Sunday Light to moderate snow develops in the morning and continues in the afternoon. Increasing light to moderate ridgeline winds.
Saturday Night A few light rain and snow showers with partial clearing most likely during the evening hours.
Sunday Increasing light rain and snow.
Saturday Night A few very light rain and snow showers. Moderate ridgeline winds.
Sunday Periods of light snow increase during the afternoon. Moderate ridgeline winds.

Issued: 2:10 PM PST Saturday, November 23, 2024

Precipitation (in)

Saturday Night Sunday Sunday Night Monday
4 pm - 4 am 4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge 0.25 LT 0.10 LT 0.10 LT 0.10
Mt Baker Ski Area LT 0.25 0.25 - 0.50 0.25 LT 0.10
Mt. Loop - Barlow Pass LT 0.10 0.25 - 0.50 0.25 LT 0.10
Stevens Pass LT 0.10 LT 0.25 LT 0.25 LT 0.10
Snoqualmie Pass LT 0.10 0.25 0.25 LT 0.10
Crystal Mt LT 0.10 0.50 0.25 LT 0.10
Paradise LT 0.25 0.75 -1.00 0.50 - 0.75 LT 0.25
White Pass LT 0.10 0.25 - 0.50 0.25 LT 0.10
Washington Pass LT 0.10 LT 0.25 LT 0.25 LT 0.10
Mission Ridge LT 0.10 0.25 - 0.50 0.25 LT 0.10
Salmon la Sac - Gallagher Head LT 0.10 0.25 - 0.50 0.25 LT 0.10
Tieton River - Darland Mt. LT 0.10 0.25 - 0.50 0.25 LT 0.10
Mt Hood Meadows LT 0.10 LT 0.25 0.25 LT 0.10
Timberline LT 0.10 0.25 0.25 LT 0.10
Hurricane Ridge Precipitation (in)
Saturday Night 0.25
Sunday LT 0.10
Sunday Night LT 0.10
Monday LT 0.10
Mt Baker Ski Area Precipitation (in)
Saturday Night LT 0.25
Sunday 0.25 - 0.50
Sunday Night 0.25
Monday LT 0.10
Mt. Loop - Barlow Pass Precipitation (in)
Saturday Night LT 0.10
Sunday 0.25 - 0.50
Sunday Night 0.25
Monday LT 0.10
Stevens Pass Precipitation (in)
Saturday Night LT 0.10
Sunday LT 0.25
Sunday Night LT 0.25
Monday LT 0.10
Snoqualmie Pass Precipitation (in)
Saturday Night LT 0.10
Sunday 0.25
Sunday Night 0.25
Monday LT 0.10
Crystal Mt Precipitation (in)
Saturday Night LT 0.10
Sunday 0.50
Sunday Night 0.25
Monday LT 0.10
Paradise Precipitation (in)
Saturday Night LT 0.25
Sunday 0.75 -1.00
Sunday Night 0.50 - 0.75
Monday LT 0.25
White Pass Precipitation (in)
Saturday Night LT 0.10
Sunday 0.25 - 0.50
Sunday Night 0.25
Monday LT 0.10
Washington Pass Precipitation (in)
Saturday Night LT 0.10
Sunday LT 0.25
Sunday Night LT 0.25
Monday LT 0.10
Mission Ridge Precipitation (in)
Saturday Night LT 0.10
Sunday 0.25 - 0.50
Sunday Night 0.25
Monday LT 0.10
Salmon la Sac - Gallagher Head Precipitation (in)
Saturday Night LT 0.10
Sunday 0.25 - 0.50
Sunday Night 0.25
Monday LT 0.10
Tieton River - Darland Mt. Precipitation (in)
Saturday Night LT 0.10
Sunday 0.25 - 0.50
Sunday Night 0.25
Monday LT 0.10
Mt Hood Meadows Precipitation (in)
Saturday Night LT 0.10
Sunday LT 0.25
Sunday Night 0.25
Monday LT 0.10
Timberline Precipitation (in)
Saturday Night LT 0.10
Sunday 0.25
Sunday Night 0.25
Monday LT 0.10

Issued: 2:10 PM PST Saturday, November 23, 2024

Snow Level (ft)

Saturday Evening Saturday Night* Sunday Morning* Sunday Afternoon* Sunday Evening* Sunday Night* Monday Morning* Monday Afternoon*
Olympics 3000' 3000' 3000' 3000' 3000' 3000' 3000' 3500'
West North 3000' 2500' 2500' 3000' 3000' 2500' 2500' 3000'
West Central 3000' 2500' 2500' 3000' 3000' 3000' 3000' 3500'
West South 3000' 2500' 2500' 3000' 3500' 3500' 3000' 3500'
Stevens Pass 3000' 2500' 2500' 3000' 3000' 3000' 2500' 3000'
Snoqualmie Pass 3000' 2500' 2500' 3000' 3000' 3000' 3000' 3000'
East North 2500' 2000' 2000' 2500' 2500' 2500' 2500' 3000'
East Central 3000' 2500' 2500' 2500' 3000' 3000' 3000' 3000'
East South 3000' 2500' 2500' 3000' 3500' 3000' 3500' 3500'
Mt. Hood 3000' 2500' 3000' 3500' 4000' 4000' 4000' 4000'
Olympics Elevation
Saturday Evening 3000'
Saturday Night* 3000'
Sunday Morning* 3000'
Sunday Afternoon* 3000'
Sunday Evening* 3000'
Sunday Night* 3000'
Monday Morning* 3000'
Monday Afternoon* 3500'
West North Elevation
Saturday Evening 3000'
Saturday Night* 2500'
Sunday Morning* 2500'
Sunday Afternoon* 3000'
Sunday Evening* 3000'
Sunday Night* 2500'
Monday Morning* 2500'
Monday Afternoon* 3000'
West Central Elevation
Saturday Evening 3000'
Saturday Night* 2500'
Sunday Morning* 2500'
Sunday Afternoon* 3000'
Sunday Evening* 3000'
Sunday Night* 3000'
Monday Morning* 3000'
Monday Afternoon* 3500'
West South Elevation
Saturday Evening 3000'
Saturday Night* 2500'
Sunday Morning* 2500'
Sunday Afternoon* 3000'
Sunday Evening* 3500'
Sunday Night* 3500'
Monday Morning* 3000'
Monday Afternoon* 3500'
Stevens Pass Elevation
Saturday Evening 3000'
Saturday Night* 2500'
Sunday Morning* 2500'
Sunday Afternoon* 3000'
Sunday Evening* 3000'
Sunday Night* 3000'
Monday Morning* 2500'
Monday Afternoon* 3000'
Snoqualmie Pass Elevation
Saturday Evening 3000'
Saturday Night* 2500'
Sunday Morning* 2500'
Sunday Afternoon* 3000'
Sunday Evening* 3000'
Sunday Night* 3000'
Monday Morning* 3000'
Monday Afternoon* 3000'
East North Elevation
Saturday Evening 2500'
Saturday Night* 2000'
Sunday Morning* 2000'
Sunday Afternoon* 2500'
Sunday Evening* 2500'
Sunday Night* 2500'
Monday Morning* 2500'
Monday Afternoon* 3000'
East Central Elevation
Saturday Evening 3000'
Saturday Night* 2500'
Sunday Morning* 2500'
Sunday Afternoon* 2500'
Sunday Evening* 3000'
Sunday Night* 3000'
Monday Morning* 3000'
Monday Afternoon* 3000'
East South Elevation
Saturday Evening 3000'
Saturday Night* 2500'
Sunday Morning* 2500'
Sunday Afternoon* 3000'
Sunday Evening* 3500'
Sunday Night* 3000'
Monday Morning* 3500'
Monday Afternoon* 3500'
Mt. Hood Elevation
Saturday Evening 3000'
Saturday Night* 2500'
Sunday Morning* 3000'
Sunday Afternoon* 3500'
Sunday Evening* 4000'
Sunday Night* 4000'
Monday Morning* 4000'
Monday Afternoon* 4000'

Issued: 2:10 PM PST Saturday, November 23, 2024

5000' Temperatures (°F)

Saturday Night Sunday
Max / Min Max / Min
Olympics 29 / 26 28 / 25
West North 29 / 25 29 / 25
West Central 29 / 24 29 / 25
West South 28 / 24 30 / 26
Stevens Pass 27 / 23 28 / 25
Snoqualmie Pass 28 / 24 29 / 26
East North 24 / 19 25 / 20
East Central 26 / 22 28 / 24
East South 27 / 24 29 / 25
Mt. Hood 30 / 27 33 / 28
Olympics 5000' Temperature Forecast
(Max / Min)
Saturday Night 29 / 26
Sunday 28 / 25
West North 5000' Temperature Forecast
(Max / Min)
Saturday Night 29 / 25
Sunday 29 / 25
West Central 5000' Temperature Forecast
(Max / Min)
Saturday Night 29 / 24
Sunday 29 / 25
West South 5000' Temperature Forecast
(Max / Min)
Saturday Night 28 / 24
Sunday 30 / 26
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Saturday Night 27 / 23
Sunday 28 / 25
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Saturday Night 28 / 24
Sunday 29 / 26
East North 5000' Temperature Forecast
(Max / Min)
Saturday Night 24 / 19
Sunday 25 / 20
East Central 5000' Temperature Forecast
(Max / Min)
Saturday Night 26 / 22
Sunday 28 / 24
East South 5000' Temperature Forecast
(Max / Min)
Saturday Night 27 / 24
Sunday 29 / 25
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Saturday Night 30 / 27
Sunday 33 / 28

Issued: 2:10 PM PST Saturday, November 23, 2024

Ridgeline Winds (mph)

Saturday Evening Saturday Night Sunday Morning Sunday Afternoon
Olympics SSW 5-15 S 10-20 SSE 5-15 S 0-10
West North S 5-15 SSE 10-20 SE 5-15 ESE 5-15
West Central SW 5-15 SSE 5-15 SE 5-15 SSE 10-20
West South SSW 5-15 S 5-15 S 5-15 S 5-15
Stevens Pass WSW 0-10 SE 5-15 SE 10-20 SE 10-20
Snoqualmie Pass W 5-15 SE 5-15 SE 10-20 SE 10-20
East North WSW 0-10 SSE 0-10 SE 10-20 SE 10-20
East Central W 5-15 S 5-15 SSE 10-20 SSE 10-20
East South W 5-15 SSW 5-15 SSE 5-15 S 10-20
Mt. Hood WSW 15-25 SSW 10-20 SSW 20-30 SSW 15-25
Olympics Ridgeline Winds (mph)
Saturday Evening SSW 5-15
Saturday Night S 10-20
Sunday Morning SSE 5-15
Sunday Afternoon S 0-10
West North Ridgeline Winds (mph)
Saturday Evening S 5-15
Saturday Night SSE 10-20
Sunday Morning SE 5-15
Sunday Afternoon ESE 5-15
West Central Ridgeline Winds (mph)
Saturday Evening SW 5-15
Saturday Night SSE 5-15
Sunday Morning SE 5-15
Sunday Afternoon SSE 10-20
West South Ridgeline Winds (mph)
Saturday Evening SSW 5-15
Saturday Night S 5-15
Sunday Morning S 5-15
Sunday Afternoon S 5-15
Stevens Pass Ridgeline Winds (mph)
Saturday Evening WSW 0-10
Saturday Night SE 5-15
Sunday Morning SE 10-20
Sunday Afternoon SE 10-20
Snoqualmie Pass Ridgeline Winds (mph)
Saturday Evening W 5-15
Saturday Night SE 5-15
Sunday Morning SE 10-20
Sunday Afternoon SE 10-20
East North Ridgeline Winds (mph)
Saturday Evening WSW 0-10
Saturday Night SSE 0-10
Sunday Morning SE 10-20
Sunday Afternoon SE 10-20
East Central Ridgeline Winds (mph)
Saturday Evening W 5-15
Saturday Night S 5-15
Sunday Morning SSE 10-20
Sunday Afternoon SSE 10-20
East South Ridgeline Winds (mph)
Saturday Evening W 5-15
Saturday Night SSW 5-15
Sunday Morning SSE 5-15
Sunday Afternoon S 10-20
Mt. Hood Ridgeline Winds (mph)
Saturday Evening WSW 15-25
Saturday Night SSW 10-20
Sunday Morning SSW 20-30
Sunday Afternoon SSW 15-25

Issued: 2:10 PM PST Saturday, November 23, 2024

Extended Weather Synopsis

Chances of showers linger Monday night but become increasingly isolated. The upper trough moves onshore over southern Oregon early Tuesday, leaving a drying northerly flow across our region and much better chances for sunshine. Flow switches NWerly Tuesday night and a weak disturbance likely brings some light snow to the mountains of northwestern Washington on Wednesday along with slightly cooler temperatures.

Extended Snow Level (ft)

Monday Night* Tuesday Tuesday Night Wednesday
West North 3000' 3000' 2500' 2000'
Snoqualmie Pass 3000' 3000' 3000' 3000'
Mt. Hood 4000' 3500' 3500' 3500'
West North Elevation
Monday Night* 3000'
Tuesday 3000'
Tuesday Night 2500'
Wednesday 2000'
Snoqualmie Pass Elevation
Monday Night* 3000'
Tuesday 3000'
Tuesday Night 3000'
Wednesday 3000'
Mt. Hood Elevation
Monday Night* 4000'
Tuesday 3500'
Tuesday Night 3500'
Wednesday 3500'

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

Previous forecast from Nov 22, 2024

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’.