Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Saturday & Friday
A sharp upper trough will swing east across the Pacific Northwest Saturday and Saturday Night with the axis of the trough crossing the Cascades Saturday afternoon. A slow-moving associated cold front crosses the Cascades on Saturday afternoon. Saturday night the flow shifts to the NW and results in upslope flow on the north side of the Olympics and renewed snowfall at Hurricane Ridge.
On Sunday, a strong ridge builds over the Northwest coastal waters and begins to shift east over the forecast region. The ridge will bring a shift to a drier airmass, with that drying trend continuing Sunday night.
Weather Forecast
Olympics
| Saturday Afternoon |
Light to moderate snow showers. |
| Saturday Night |
Increasing light to moderate snow showers. |
| Sunday Morning |
Light snow showers ending. |
| Sunday Afternoon |
Decreasing Clouds. |
| Sunday Night |
Becoming partly to mostly clear. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Saturday Afternoon |
Light to moderate snow showers. |
| Saturday Night |
Decreasing light snow showers ending in the north part. |
| Sunday Morning |
Decreasing light snow showers mainly in central and southern parts, ending. |
| Sunday Afternoon |
Mostly cloudy. |
| Sunday Night |
Becoming partly to mostly clear. |
East slopes of the Washington Cascades
| Saturday Afternoon |
Light snow showers. |
| Saturday Night |
Decreasing light snow showers ending in the north part. |
| Sunday Morning |
Decreasing light snow showers mainly in central and southern parts, ending. |
| Sunday Afternoon |
Mostly high clouds. |
| Sunday Night |
Becoming mostly clear. |
Mt. Hood Area
| Saturday Afternoon |
Light to moderate snow showers. |
| Saturday Night |
Light to moderate snow showers. |
| Sunday Morning |
Decreasing light snow showers. |
| Sunday Afternoon |
Decreasing light snow showers. |
| Sunday Night |
Mostly cloudy, chance of light snow showers. |
Issued: 12:38 PM PST Saturday, December 2, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Saturday Morning | Snow Level | 2500' | 2500' | 1000' | ' | ' | 3000' | ' | 3000' |
| Saturday Afternoon | Snow Level * | 2500' | 2500' | 1000' | ' | ' | 3000' | ' | 3000' |
| Saturday Night | Snow Level * | 1500' | 1500' | 1000' | ' | ' | 2000' | ' | 2000' |
| Sunday Morning | Snow Level | 2000' | 1500' | 1000' | ' | ' | 2000' | ' | 2000' |
| Sunday Afternoon | Snow Level | 2000' | 2000' | 1500' | ' | ' | 2000' | ' | 2500' |
| Sunday Night | Freezing Level | 1500' | 1000' | 1000' | ' | ' | 1500' | ' | 2500' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Saturday Night |
Snow Level 1500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Sunday Night |
Freezing Level 1500' |
| Mt. Baker | Elevation |
|---|---|
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Saturday Night |
Snow Level 1500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2000' |
| Sunday Night |
Freezing Level 1000' |
| Washington Pass | Elevation |
|---|---|
| Saturday Morning |
Snow Level 1000' |
| Saturday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Saturday Night |
Snow Level 1000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 1000' |
| Sunday Afternoon |
Snow Level 1500' |
| Sunday Night |
Freezing Level 1000' |
| Leavenworth | Elevation |
|---|---|
| Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' (Easterly Flow *) |
| Saturday Night |
Snow Level ' (Easterly Flow *) |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Freezing Level ' |
| Stevens Pass | Elevation |
|---|---|
| Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' (Easterly Flow *) |
| Saturday Night |
Snow Level ' (Easterly Flow *) |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Freezing Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Morning |
Snow Level 3000' |
| Saturday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Saturday Night |
Snow Level 2000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Sunday Night |
Freezing Level 1500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' (Easterly Flow *) |
| Saturday Night |
Snow Level ' (Easterly Flow *) |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Freezing Level ' |
| Mt. Hood | Elevation |
|---|---|
| Saturday Morning |
Snow Level 3000' |
| Saturday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Saturday Night |
Snow Level 2000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Night |
Freezing Level 2500' |
* Easterly flow in the Cascade Passes can cause locally lower Snow or Freezing levels than areas further west.
Freezing Level is when no precipitation is forecast.
Precipitation Forecast
| Friday | Friday | |
|---|---|---|
| Hurricane Ridge | 0 - 0.50 | LT 0.10 |
| Mt Baker Ski Area | 0 - 0.50 | LT 0.10 |
| Washington Pass | LT 0.25 | LT 0.10 |
| Stevens Pass | LT 0.25 | LT 0.10 |
| Snoqualmie Pass | 0.25 - 0.50 | LT 0.25 |
| Mission Ridge | LT 0.25 | LT 0.10 |
| Crystal Mt | 0.25 - 0.50 | LT 0.25 |
| Paradise | 0.50 - 0.75 | LT 0.25 |
| White Pass | 0.25 - 0.50 | LT 0.25 |
| Mt Hood Meadows | 0.50 - 0.75 | LT 0.25 |
| Timberline | 0 - 0.75 | LT 0.25 |
LT = less than; WE or Water equivalent is the liquid water equivalent of melted snow in hundredths of inches. As a rough approximation 1 inch of snow = about .10 inches WE, or 10 inches of snow = about 1 inch WE.
Issued: 12:38 PM PST Saturday, December 2, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Morning | S 10 - 15 | S 5 - 15 | S 10 - 15 | --- - | SSW 10 - 20 |
| Saturday Afternoon | SW 5 - 10 | NE 5 - 10 | E 10 - 15 | --- - | SSE 10 - 15 |
| Saturday Night | NNW 5 - 10 | NNE 5 - 10 | VAR 0 - 10 | --- - | WSW 15 - 20 |
| Sunday Morning | NW 5 - 10 | N 0 - 10 | WNW 10 - 15 | --- - | W 20 - 30 |
| Sunday Afternoon | W 0 - 10 | W 5 - 10 | WNW 10 - 15 | --- - | W 25 - 35 |
| Sunday Night | NW 5 - 10 | W 0 - 10 | NW 5 - 10 | --- - | WNW 20 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Morning | S 10 - 15 |
| Saturday Afternoon | SW 5 - 10 |
| Saturday Night | NNW 5 - 10 |
| Sunday Morning | NW 5 - 10 |
| Sunday Afternoon | W 0 - 10 |
| Sunday Night | NW 5 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Morning | S 5 - 15 |
| Saturday Afternoon | NE 5 - 10 |
| Saturday Night | NNE 5 - 10 |
| Sunday Morning | N 0 - 10 |
| Sunday Afternoon | W 5 - 10 |
| Sunday Night | W 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Morning | S 10 - 15 |
| Saturday Afternoon | E 10 - 15 |
| Saturday Night | VAR 0 - 10 |
| Sunday Morning | WNW 10 - 15 |
| Sunday Afternoon | WNW 10 - 15 |
| Sunday Night | NW 5 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Saturday Morning | SSW 10 - 20 |
| Saturday Afternoon | SSE 10 - 15 |
| Saturday Night | WSW 15 - 20 |
| Sunday Morning | W 20 - 30 |
| Sunday Afternoon | W 25 - 35 |
| Sunday Night | WNW 20 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Morning | S 10 - 15 |
| Saturday Afternoon | SW 5 - 10 |
| Saturday Night | NNW 5 - 10 |
| Sunday Morning | NW 5 - 10 |
| Sunday Afternoon | W 0 - 10 |
| Sunday Night | NW 5 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Morning | S 5 - 15 |
| Saturday Afternoon | NE 5 - 10 |
| Saturday Night | NNE 5 - 10 |
| Sunday Morning | N 0 - 10 |
| Sunday Afternoon | W 5 - 10 |
| Sunday Night | W 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Morning | S 10 - 15 |
| Saturday Afternoon | E 10 - 15 |
| Saturday Night | VAR 0 - 10 |
| Sunday Morning | WNW 10 - 15 |
| Sunday Afternoon | WNW 10 - 15 |
| Sunday Night | NW 5 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Morning | SSW 10 - 20 |
| Saturday Afternoon | SSE 10 - 15 |
| Saturday Night | WSW 15 - 20 |
| Sunday Morning | W 20 - 30 |
| Sunday Afternoon | W 25 - 35 |
| Sunday Night | WNW 20 - 30 |
Directions above indicate the direction the wind blows from on the 16-point cardinal scale. These winds indicate "free" winds, or those winds in the atmosphere not influenced by terrain. Topographical effects may produce greater or lower wind speeds in certain locations as well as significant variations in direction.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Morning | SSW 10 - 20 | SW 10 - 20 | SW 20 - 35 | --- - | SSW 25 - 35 |
| Saturday Afternoon | S 15 - 20 | SSE 15 - 20 | S 25 - 35 | --- - | SSW 30 - 40 |
| Saturday Night | VAR 0 - 10 | S 10 - 15 | SW 10 - 15 | --- - | SW 20 - 30 |
| Sunday Morning | NNW 15 - 20 | NNW 15 - 20 | NNW 25 - 30 | --- - | NNW 25 - 30 |
| Sunday Afternoon | WNW 20 - 25 | WNW 20 - 25 | NW 30 - 40 | --- - | NW 30 - 40 |
| Sunday Night | NNW 20 - 25 | NNW 25 - 35 | NNW 20 - 30 | --- - | NNW 25 - 40 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Morning | SSW 10 - 20 |
| Saturday Afternoon | S 15 - 20 |
| Saturday Night | VAR 0 - 10 |
| Sunday Morning | NNW 15 - 20 |
| Sunday Afternoon | WNW 20 - 25 |
| Sunday Night | NNW 20 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Morning | SW 10 - 20 |
| Saturday Afternoon | SSE 15 - 20 |
| Saturday Night | S 10 - 15 |
| Sunday Morning | NNW 15 - 20 |
| Sunday Afternoon | WNW 20 - 25 |
| Sunday Night | NNW 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Morning | SW 20 - 35 |
| Saturday Afternoon | S 25 - 35 |
| Saturday Night | SW 10 - 15 |
| Sunday Morning | NNW 25 - 30 |
| Sunday Afternoon | NW 30 - 40 |
| Sunday Night | NNW 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Morning | SSW 25 - 35 |
| Saturday Afternoon | SSW 30 - 40 |
| Saturday Night | SW 20 - 30 |
| Sunday Morning | NNW 25 - 30 |
| Sunday Afternoon | NW 30 - 40 |
| Sunday Night | NNW 25 - 40 |
Directions above indicate the direction the wind blows from on the 16-point cardinal scale. These winds indicate "free" winds, or those winds in the atmosphere not influenced by terrain. Topographical effects may produce greater or lower wind speeds in certain locations as well as significant variations in direction.
Issued: 12:38 PM PST Saturday, December 2, 2017
Extended Weather Synopsis for Friday night through Friday
A very large upper ridge and dry airmass becomes established over the Pacific Northwest. By Tuesday and Wednesday, a surface high-pressure east of the Cascade Crest is likely to produce easterly winds at the passes.
Extended Weather
All Zones
MondayDecreasing clouds, especially in the south.
TuesdaySunny and clear; local clouds or fog in the lowlands, particularly at night.
WednesdaySunny and clear; local clouds or fog in the lowlands, particularly at night.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Monday | Freezing Level | 1500' - 2500' | 2000' - 3000' | 3000' - 4000' | |
| Monday Night | Freezing Level | 1500' - 3500' | 3500' - 5500' | 7500' - 9500' | |
| Tuesday | Freezing Level | 7000' - 9000' | 7000' - 9000' | 9500' - 11500' | |
| Tuesday Night | Freezing Level | 9500' - 11500' | 9000' - 11000' | 9000' - 11000' | |
| Wednesday | Freezing Level | 10000' - 12000' | 10000' - 12000' | 10000' - 12000' |
| Mt. Baker | Elevation |
|---|---|
| Monday |
Freezing Level 1500' - 2500' |
| Monday Night |
Freezing Level 1500' - 3500' |
| Tuesday |
Freezing Level 7000' - 9000' |
| Tuesday Night |
Freezing Level 9500' - 11500' |
| Wednesday |
Freezing Level 10000' - 12000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday |
Freezing Level 2000' - 3000' |
| Monday Night |
Freezing Level 3500' - 5500' |
| Tuesday |
Freezing Level 7000' - 9000' |
| Tuesday Night |
Freezing Level 9000' - 11000' |
| Wednesday |
Freezing Level 10000' - 12000' |
| Mt. Hood | Elevation |
|---|---|
| Monday |
Freezing Level 3000' - 4000' |
| Monday Night |
Freezing Level 7500' - 9500' |
| Tuesday |
Freezing Level 9500' - 11500' |
| Tuesday Night |
Freezing Level 9000' - 11000' |
| Wednesday |
Freezing Level 10000' - 12000' |
* Easterly flow in the Cascade Passes can cause locally lower Snow or Freezing levels than areas further west.
Freezing Level is when no precipitation is forecast.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Previous forecast from Dec 2, 2017
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