Issued: 2:09 PM PST Sunday, November 24, 2024
by Robert Hahn

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

Weather Synopsis

The Pacific Northwest transitions gradually out of a wet and active pattern as we head into Thanksgiving week. A low churning 500 miles off the mouth of the Columbia River on Sunday afternoon continues to drift southward. SSW flow aloft downstream of the low enables weak perturbations riding northward to tap into some moisture associated with the remnants of California's recent atmospheric river. A SSW-NNE oriented band of precipitation targeting the central and southern Washington Cascades Sunday afternoon drifts northward. It weakens Sunday night and Monday, bringing continued light to occasionally moderate rain and snow with snow levels remaining relatively steady around 2500-3500 ft.

Monday night, the low kicks southeastward toward the southern Oregon Coast, limiting additional precipitation to very light and isolated snow showers by the overnight hours. Tuesday should bring mostly dry weather, although we expect some trapped low-level moisture maintaining clouds and a few flurries along the west slopes of the Cascades.

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
Sunday Night Light rain and snow showers in the northern Olympics; moderate to heavy in the southern part.
Monday Light rain and snow showers in the northern Olympics; moderate in the southern part.
Sunday Night Periods of increasing light rain and snow.
Monday Periods of decreasing light rain and snow.
Sunday Night Periods of light to moderate rain and snow.
Monday Periods of light to moderate rain and snow.
Sunday Night Periods of light to moderate rain and snow, heaviest on the volcanoes.
Monday Periods of light to moderate rain and snow, heaviest on the volcanoes.
Sunday Night Periods of very light rain and snow. Light ridgeline and E wind at the Pass.
Monday Periods of light rain or snow. Decreasing light ridgeline and E wind at the Pass.
Sunday Night Periods of very light rain and snow. Light to occasionally moderate ridgeline and E wind at the Pass.
Monday Periods of light rain or snow. Decreasing light ridgeline and E wind at the Pass.
Sunday Night Periods of light snow.
Monday Periods of light rain or snow.
Sunday Night Periods of light rain and snow.
Monday Periods of light rain or snow.
Sunday Night Periods of light rain and snow.
Monday Periods of light rain or snow.
Sunday Night Periods of light rain and snow. Moderate ridgeline winds.
Monday Light rain and snow at times. Moderate ridgeline winds.

Issued: 2:09 PM PST Sunday, November 24, 2024

Precipitation (in)

Sunday Night Monday Monday Night Tuesday
4 pm - 4 am 4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge LT 0.25 LT 0.25 LT 0.10 0
Mt Baker Ski Area 0.25 0.25 LT 0.10 LT 0.10
Mt. Loop - Barlow Pass LT 0.25 LT 0.25 LT 0.10 LT 0.10
Stevens Pass LT 0.25 LT 0.25 LT 0.10 0
Snoqualmie Pass LT 0.25 LT 0.25 LT 0.10 LT 0.10
Crystal Mt 0.25 0.25 LT 0.10 0
Paradise 0.25 - 0.50 0.25 LT 0.10 0
White Pass LT 0.25 LT 0.10 LT 0.10 LT 0.10
Washington Pass LT 0.25 LT 0.10 LT 0.10 0
Mission Ridge LT 0.25 LT 0.25 LT 0.10 0
Salmon la Sac - Gallagher Head LT 0.25 LT 0.25 LT 0.10 0
Tieton River - Darland Mt. LT 0.25 LT 0.10 LT 0.10 0
Mt Hood Meadows LT 0.25 LT 0.25 LT 0.10 LT 0.10
Timberline LT 0.25 LT 0.25 LT 0.10 LT 0.10
Hurricane Ridge Precipitation (in)
Sunday Night LT 0.25
Monday LT 0.25
Monday Night LT 0.10
Tuesday 0
Mt Baker Ski Area Precipitation (in)
Sunday Night 0.25
Monday 0.25
Monday Night LT 0.10
Tuesday LT 0.10
Mt. Loop - Barlow Pass Precipitation (in)
Sunday Night LT 0.25
Monday LT 0.25
Monday Night LT 0.10
Tuesday LT 0.10
Stevens Pass Precipitation (in)
Sunday Night LT 0.25
Monday LT 0.25
Monday Night LT 0.10
Tuesday 0
Snoqualmie Pass Precipitation (in)
Sunday Night LT 0.25
Monday LT 0.25
Monday Night LT 0.10
Tuesday LT 0.10
Crystal Mt Precipitation (in)
Sunday Night 0.25
Monday 0.25
Monday Night LT 0.10
Tuesday 0
Paradise Precipitation (in)
Sunday Night 0.25 - 0.50
Monday 0.25
Monday Night LT 0.10
Tuesday 0
White Pass Precipitation (in)
Sunday Night LT 0.25
Monday LT 0.10
Monday Night LT 0.10
Tuesday LT 0.10
Washington Pass Precipitation (in)
Sunday Night LT 0.25
Monday LT 0.10
Monday Night LT 0.10
Tuesday 0
Mission Ridge Precipitation (in)
Sunday Night LT 0.25
Monday LT 0.25
Monday Night LT 0.10
Tuesday 0
Salmon la Sac - Gallagher Head Precipitation (in)
Sunday Night LT 0.25
Monday LT 0.25
Monday Night LT 0.10
Tuesday 0
Tieton River - Darland Mt. Precipitation (in)
Sunday Night LT 0.25
Monday LT 0.10
Monday Night LT 0.10
Tuesday 0
Mt Hood Meadows Precipitation (in)
Sunday Night LT 0.25
Monday LT 0.25
Monday Night LT 0.10
Tuesday LT 0.10
Timberline Precipitation (in)
Sunday Night LT 0.25
Monday LT 0.25
Monday Night LT 0.10
Tuesday LT 0.10

Issued: 2:09 PM PST Sunday, November 24, 2024

Snow Level (ft)

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

Issued: 2:09 PM PST Sunday, November 24, 2024

5000' Temperatures (°F)

Sunday Night Monday
Max / Min Max / Min
Olympics 30 / 27 32 / 27
West North 29 / 26 31 / 26
West Central 29 / 27 31 / 27
West South 30 / 27 32 / 27
Stevens Pass 29 / 26 30 / 26
Snoqualmie Pass 29 / 27 30 / 27
East North 24 / 21 27 / 22
East Central 28 / 24 30 / 26
East South 28 / 25 32 / 27
Mt. Hood 33 / 30 34 / 29
Olympics 5000' Temperature Forecast
(Max / Min)
Sunday Night 30 / 27
Monday 32 / 27
West North 5000' Temperature Forecast
(Max / Min)
Sunday Night 29 / 26
Monday 31 / 26
West Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 29 / 27
Monday 31 / 27
West South 5000' Temperature Forecast
(Max / Min)
Sunday Night 30 / 27
Monday 32 / 27
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 29 / 26
Monday 30 / 26
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 29 / 27
Monday 30 / 27
East North 5000' Temperature Forecast
(Max / Min)
Sunday Night 24 / 21
Monday 27 / 22
East Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 28 / 24
Monday 30 / 26
East South 5000' Temperature Forecast
(Max / Min)
Sunday Night 28 / 25
Monday 32 / 27
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Sunday Night 33 / 30
Monday 34 / 29

Issued: 2:09 PM PST Sunday, November 24, 2024

Ridgeline Winds (mph)

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

Issued: 2:09 PM PST Sunday, November 24, 2024

Extended Weather Synopsis

Upper-level winds switch NWerly Tuesday night as flow rounds the back of an offshore ridge, resulting in slightly cooler than average temperatures for late November. Weak disturbances could impact parts of northern Washington at times from Tuesday night through Thursday. The timing of any individual disturbance is difficult to pinpoint, but expect these to bring some weak convergence bands of light snowfall between the Skagit and Stevens Pass.

Extended Snow Level (ft)

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

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

Previous forecast from Nov 23, 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’.