Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Saturday & Friday
Another 10-15 inches of generally lower density snow accumulated along the west slopes of the Cascades and Cascades Passes in the 24 hours ending 4 am Saturday morning.
A strong westerly jet will remained aimed into Oregon over the weekend leaving the PNW on the cold side of the jet. That said, cool marine air will slowly dislodge a colder arctic air mass in place over the east slopes of the Cascades, with a slow warming trend for the Cascade Passes and east slopes today and tonight although snow levels will remain below Pass levels.
A surface trough rotating out of a weak surface low off of Vancouver Island will increase shower activity this afternoon after a relative break in the action this morning through mid-day. Light to moderate showers will continue through Sunday before shower activity begins to wane Sunday night. The timing and location of the heaviest shower activity on Sunday is still difficult to pin down at this point but in general the west slopes and Mt. Hood should continue to pick up moderate amounts of new snow over the weekend.
Weather Forecast
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Saturday Morning |
Cloudy with scattered light snow showers. |
| Saturday Afternoon |
Increasing light to moderate snow showers. Slow warming trend for the Cascade Passes. |
| Saturday Night - Sunday |
Cloudy with light to moderate rain and snow showers. |
| Sunday Night |
Mostly cloudy with scattered light snow showers decreasing overnight. |
Olympics
| Saturday Morning |
Cloudy with scattered light snow showers. |
| Saturday Mid-day - Saturday Afternoon |
Increasing light to moderate snow showers. |
| Saturday Night - Sunday |
Cloudy with light to occasionally moderate rain and snow showers. |
| Sunday Night |
Mostly cloudy with scattered light snow showers decreasing overnight. |
East slopes of the Washington Cascades
| Saturday Morning |
Cloudy with scattered light snow showers. |
| Saturday Afternoon |
Increasing light to moderate snow showers late afternoon. Slow warming trend. |
| Saturday Night - Sunday |
Cloudy with light to occasionally moderate rain and snow showers. |
| Sunday Night |
Mostly cloudy with scattered light snow showers decreasing overnight. |
Mt. Hood Area
| Saturday Morning |
Cloudy with scattered light snow showers. |
| Saturday Afternoon |
Increasing light to moderate snow showers. |
| Saturday Night - Sunday |
Moderate to occasionally heavy rain and snow showers. |
| Sunday Night |
Mostly cloudy with scattered light snow showers decreasing overnight. |
Issued: 7:10 AM PST Saturday, December 10, 2016
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 * | 1500' | 500' | 0' | ' | ' | 1000' | ' | 2500' |
| Saturday Afternoon - Saturday Night | Snow Level | 2500' | 1500' | 1000' | ' | ' | 2000' | ' | 3000' |
| Sunday | Snow Level | 2000' | 1000' | 1000' | ' | ' | 2000' | ' | 2500' |
| Sunday Night | Snow Level | 1000' | 0' | 0' | ' | ' | 1500' | ' | 2000' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Morning |
Snow Level 1500' (Easterly Flow *) |
| Saturday Afternoon - Saturday Night |
Snow Level 2500' |
| Sunday |
Snow Level 2000' |
| Sunday Night |
Snow Level 1000' |
| Mt. Baker | Elevation |
|---|---|
| Saturday Morning |
Snow Level 500' (Easterly Flow *) |
| Saturday Afternoon - Saturday Night |
Snow Level 1500' |
| Sunday |
Snow Level 1000' |
| Sunday Night |
Snow Level 0' |
| Washington Pass | Elevation |
|---|---|
| Saturday Morning |
Snow Level 0' (Easterly Flow *) |
| Saturday Afternoon - Saturday Night |
Snow Level 1000' |
| Sunday |
Snow Level 1000' |
| Sunday Night |
Snow Level 0' |
| Leavenworth | Elevation |
|---|---|
| Saturday Morning |
Snow Level ' (Easterly Flow *) |
| Saturday Afternoon - Saturday Night |
Snow Level ' |
| Sunday |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Saturday Morning |
Snow Level ' (Easterly Flow *) |
| Saturday Afternoon - Saturday Night |
Snow Level ' |
| Sunday |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Morning |
Snow Level 1000' (Easterly Flow *) |
| Saturday Afternoon - Saturday Night |
Snow Level 2000' |
| Sunday |
Snow Level 2000' |
| Sunday Night |
Snow Level 1500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Morning |
Snow Level ' (Easterly Flow *) |
| Saturday Afternoon - Saturday Night |
Snow Level ' |
| Sunday |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Saturday Morning |
Snow Level 2500' (Easterly Flow *) |
| Saturday Afternoon - Saturday Night |
Snow Level 3000' |
| Sunday |
Snow Level 2500' |
| Sunday Night |
Snow Level 2000' |
* 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 | 0.50 - 0.75 | 0 - 0.50 |
| Mt Baker Ski Area | 0.75 - 1.00 | 0 - 0.50 |
| Washington Pass | 0 - 0.75 | 0.25 - 0.50 |
| Stevens Pass | 0 - 0.75 | 0 - 1.00 |
| Snoqualmie Pass | 0 - 0.75 | 0 - 1.00 |
| Mission Ridge | LT 0.25 | LT 0.25 |
| Crystal Mt | 0 - 0.50 | 0 - 0.75 |
| Paradise | 1.00 - 1.50 | 0 - 1.50 |
| White Pass | 0.50 - 0.75 | 0 - 1.00 |
| Mt Hood Meadows | 0 - 1.00 | 0 - 1.50 |
| Timberline | 1.00 - 1.50 | 0 - 2.00 |
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: 7:10 AM PST Saturday, December 10, 2016
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Morning | SW 5 - 15 | SW 5 - 15 | WSW 10 - 20 | --- - | W 15 - 25 |
| Saturday Afternoon | WSW 15 - 25 | S 10 - 20 | SW 15 - 25 | --- - | SW 20 - 30 |
| Saturday Night - Sunday Morning | WSW 15 - 25 | SSW 10 - 20 | SW 20 - 30 | --- - | WSW 20 - 35 |
| Sunday Afternoon | W 10 - 20 | W 0 - 10 | WSW 15 - 25 | --- - | W 25 - 35 |
| Sunday Night | N 0 - 10 | NE 5 - 15 | W 5 - 15 | --- - | WNW 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | WSW 15 - 25 |
| Saturday Night - Sunday Morning | WSW 15 - 25 |
| Sunday Afternoon | W 10 - 20 |
| Sunday Night | N 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | S 10 - 20 |
| Saturday Night - Sunday Morning | SSW 10 - 20 |
| Sunday Afternoon | W 0 - 10 |
| Sunday Night | NE 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Morning | WSW 10 - 20 |
| Saturday Afternoon | SW 15 - 25 |
| Saturday Night - Sunday Morning | SW 20 - 30 |
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | W 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night - Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Saturday Morning | W 15 - 25 |
| Saturday Afternoon | SW 20 - 30 |
| Saturday Night - Sunday Morning | WSW 20 - 35 |
| Sunday Afternoon | W 25 - 35 |
| Sunday Night | WNW 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | WSW 15 - 25 |
| Saturday Night - Sunday Morning | WSW 15 - 25 |
| Sunday Afternoon | W 10 - 20 |
| Sunday Night | N 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | S 10 - 20 |
| Saturday Night - Sunday Morning | SSW 10 - 20 |
| Sunday Afternoon | W 0 - 10 |
| Sunday Night | NE 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Morning | WSW 10 - 20 |
| Saturday Afternoon | SW 15 - 25 |
| Saturday Night - Sunday Morning | SW 20 - 30 |
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | W 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night - Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Morning | W 15 - 25 |
| Saturday Afternoon | SW 20 - 30 |
| Saturday Night - Sunday Morning | WSW 20 - 35 |
| Sunday Afternoon | W 25 - 35 |
| Sunday Night | WNW 15 - 25 |
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 | WSW 10 - 20 | WSW 15 - 25 | WSW 25 - 35 | --- - | WSW 35 - 45 |
| Saturday Afternoon | SW 20 - 30 | SW 15 - 25 | W 20 - 30 | --- - | W 25 - 35 |
| Saturday Night - Sunday Morning | SW 25 - 40 | WSW 15 - 25 | WSW 35 - 50 | --- - | W 35 - 50 |
| Sunday Afternoon | W 10 - 20 | W 15 - 25 | W 20 - 30 | --- - | W 40 - 50 |
| Sunday Night | W 10 - 20 | WNW 15 - 25 | W 15 - 25 | --- - | NW 30 - 40 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Morning | WSW 10 - 20 |
| Saturday Afternoon | SW 20 - 30 |
| Saturday Night - Sunday Morning | SW 25 - 40 |
| Sunday Afternoon | W 10 - 20 |
| Sunday Night | W 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Morning | WSW 15 - 25 |
| Saturday Afternoon | SW 15 - 25 |
| Saturday Night - Sunday Morning | WSW 15 - 25 |
| Sunday Afternoon | W 15 - 25 |
| Sunday Night | WNW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Morning | WSW 25 - 35 |
| Saturday Afternoon | W 20 - 30 |
| Saturday Night - Sunday Morning | WSW 35 - 50 |
| Sunday Afternoon | W 20 - 30 |
| Sunday Night | W 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night - Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Morning | WSW 35 - 45 |
| Saturday Afternoon | W 25 - 35 |
| Saturday Night - Sunday Morning | W 35 - 50 |
| Sunday Afternoon | W 40 - 50 |
| Sunday Night | NW 30 - 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Dec 4, 2016
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