Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Sunday & Saturday
A closed and vertically stacked upper and surface low is located 300 miles west of the mouth of the Columbia River early Sunday morning. The system is relatively moisture-starved and compact with most of the precipitation remaining offshore, except a few very narrow bands of light snow that are moving westward and will dissipate during the early morning hours. Mid-level clouds are creating mostly cloudy skies across much of western Washington and Oregon on Sunday morning.
As the closed low drops southeast to the central Oregon Coast this morning, flow will switch to northerly as a large high pressure re-builds south Alaska. Most locations should witness a clearing trend on Sunday with the exception of Mt. Hood where mostly cloudy skies may linger through the evening hours.
The northerly flow will bring a chance of light snow to the north slope of the Olympic mountains during the morning and early afternoon hours. Light easterly flow will develop across the Cascade passes during the afternoon.
Sunday night the lower-level flow easterly flow increases slightly, allowing colder area to infiltrate western Washington from the east side of the Cascades and BC coast range. Northerly flow continues aloft.
On Monday, the offshore high pressure tilts into British Columbia, keeping the sunny weather in place and wither moderating temperatures over the Pacific Northwest.
On Monday night, the high slides southward over the region, bringing further moderation aloft, with a good inversion likely to set up, particularly on the east slopes of the Cascades.
Weather Forecast
Olympics
| Sunday | Cloudy with low-level clouds banked up against the northern part of the Olympics. Light showers possible on up-slope flow. A chance of light snow showers during the morning and early afternoon hours along the north slopes. Becoming mostly sunny during the later afternoon hours. Cooling during the morning hours. |
| Sunday Night | Clear. |
| Monday | Sunny. Moderating temperatures. |
| Monday Night | Clear. Further gradual warming. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Sunday | Mostly cloudy skies will gradually clear during the morning hours. A chance of a light snow shower from Mt. Rainier southward. Clearing from north to south during the late morning hours. Some cumulus clouds moving across the south and central parts during the afternoon hours. |
| Sunday Night | Clear. Cold. |
| Monday | Sunny. Moderating temperatures. |
| Monday Night | Clear. Further moderating temperatures aloft. |
East Slopes of the Washington Cascades
| Sunday | Some mid-level clouds bringing mostly cloudy skies in the morning, giving way to mostly sunny skies by late morning. |
| Sunday Night | Clear and cold. |
| Monday | Sunny and cool. Temperatures moderating in the afternoon. |
| Monday Night | Clear. Inversion conditions anticipated. |
Mt. Hood
| Sunday | Chance of a passing light snow shower, particularly in the morning. Otherwise, partly to mostly cloudy. Cooling. |
| Sunday Night | Chance of a passing light snow shower in the early evening. Clearing during the late evening hours. Light to moderate E or NE wind. |
| Monday | Sunny. Cold in the morning with a light to moderate E wind. Moderating temperatures. |
| Monday Night | Clear. Warming. |
Issued: 7:31 AM PST Sunday, February 11, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Morning | Snow Level | 1000' | 1000' | 1000' | ' | ' | 1500' | ' | 2000' |
| Sunday Afternoon | Snow Level * | 1000' | 1000' | 1000' | ' | ' | 2000' | ' | 2000' |
| Sunday Night | Snow Level * | 0' | 0' | 0' | ' | ' | 0' | ' | 0' |
| Monday Morning | Freezing Level * | 2000' | 1000' | 1000' | ' | ' | 1000' | ' | 1000' |
| Monday Afternoon | Freezing Level | 3000' | 2500' | 3000' | ' | ' | 3000' | ' | 2000' |
| Monday Night | Freezing Level | 2500' | 2000' | 3000' | ' | ' | 3000' | ' | 5000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning |
Snow Level 1000' |
| Sunday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Sunday Night |
Snow Level 0' (Easterly Flow *) |
| Monday Morning |
Freezing Level 2000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 3000' |
| Monday Night |
Freezing Level 2500' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning |
Snow Level 1000' |
| Sunday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Sunday Night |
Snow Level 0' (Easterly Flow *) |
| Monday Morning |
Freezing Level 1000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 2500' |
| Monday Night |
Freezing Level 2000' |
| Washington Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 1000' |
| Sunday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Sunday Night |
Snow Level 0' (Easterly Flow *) |
| Monday Morning |
Freezing Level 1000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 3000' |
| Monday Night |
Freezing Level 3000' |
| Leavenworth | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night |
Snow Level ' (Easterly Flow *) |
| Monday Morning |
Freezing Level ' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level ' |
| Monday Night |
Freezing Level ' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night |
Snow Level ' (Easterly Flow *) |
| Monday Morning |
Freezing Level ' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level ' |
| Monday Night |
Freezing Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2000' (Easterly Flow *) |
| Sunday Night |
Snow Level 0' (Easterly Flow *) |
| Monday Morning |
Freezing Level 1000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 3000' |
| Monday Night |
Freezing Level 3000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night |
Snow Level ' (Easterly Flow *) |
| Monday Morning |
Freezing Level ' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level ' |
| Monday Night |
Freezing Level ' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' (Easterly Flow *) |
| Sunday Night |
Snow Level 0' (Easterly Flow *) |
| Monday Morning |
Freezing Level 1000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 2000' |
| Monday Night |
Freezing Level 5000' |
* 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
| Saturday | Saturday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | LT 0.10 | LT 0.10 |
| Washington Pass | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.10 | LT 0.10 |
| Snoqualmie Pass | LT 0.10 | LT 0.10 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 |
| Paradise | LT 0.10 | LT 0.10 |
| White Pass | LT 0.10 | LT 0.10 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 |
| Timberline | LT 0.10 | LT 0.10 |
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: 7:31 AM PST Sunday, February 11, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Morning | NNE 5 - 15 | N 0 - 10 | W 0 - 10 | --- - | W 10 - 20 |
| Sunday Afternoon | NNE 5 - 15 | N 10 - 20 | WNW 5 - 15 | --- - | NW 5 - 15 |
| Sunday Night | NE 15 - 25 | ENE 10 - 20 | E 5 - 15 | --- - | ENE 15 - 25 |
| Monday Morning | ENE 5 - 15 | ENE 0 - 10 | E 0 - 10 | --- - | E 5 - 15 |
| Monday Afternoon | VAR 0 - 10 | VAR 0 - 10 | W 0 - 10 | --- - | E 5 - 15 |
| Monday Night | VAR 0 - 10 | W 0 - 10 | W 5 - 15 | --- - | ENE 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning | NNE 5 - 15 |
| Sunday Afternoon | NNE 5 - 15 |
| Sunday Night | NE 15 - 25 |
| Monday Morning | ENE 5 - 15 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | VAR 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning | N 0 - 10 |
| Sunday Afternoon | N 10 - 20 |
| Sunday Night | ENE 10 - 20 |
| Monday Morning | ENE 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | W 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning | W 0 - 10 |
| Sunday Afternoon | WNW 5 - 15 |
| Sunday Night | E 5 - 15 |
| Monday Morning | E 0 - 10 |
| Monday Afternoon | W 0 - 10 |
| Monday Night | W 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning | W 10 - 20 |
| Sunday Afternoon | NW 5 - 15 |
| Sunday Night | ENE 15 - 25 |
| Monday Morning | E 5 - 15 |
| Monday Afternoon | E 5 - 15 |
| Monday Night | ENE 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Morning | NNE 5 - 15 |
| Sunday Afternoon | NNE 5 - 15 |
| Sunday Night | NE 15 - 25 |
| Monday Morning | ENE 5 - 15 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | VAR 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | N 0 - 10 |
| Sunday Afternoon | N 10 - 20 |
| Sunday Night | ENE 10 - 20 |
| Monday Morning | ENE 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | W 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | W 0 - 10 |
| Sunday Afternoon | WNW 5 - 15 |
| Sunday Night | E 5 - 15 |
| Monday Morning | E 0 - 10 |
| Monday Afternoon | W 0 - 10 |
| Monday Night | W 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | W 10 - 20 |
| Sunday Afternoon | NW 5 - 15 |
| Sunday Night | ENE 15 - 25 |
| Monday Morning | E 5 - 15 |
| Monday Afternoon | E 5 - 15 |
| Monday Night | ENE 5 - 15 |
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 | |
|---|---|---|---|---|---|
| Sunday Morning | NNE 10 - 20 | NNE 5 - 15 | N 10 - 20 | --- - | W 10 - 20 |
| Sunday Afternoon | NNE 15 - 25 | NNE 20 - 30 | N 10 - 20 | --- - | WNW 5 - 15 |
| Sunday Night | NNE 25 - 35 | NNE 15 - 25 | NNE 15 - 25 | --- - | NNE 15 - 25 |
| Monday Morning | NNE 20 - 30 | NNE 20 - 30 | NNE 20 - 30 | --- - | NNE 35 - 45 |
| Monday Afternoon | NNW 15 - 25 | N 20 - 30 | NNE 20 - 30 | --- - | NNE 35 - 50 |
| Monday Night | WNW 10 - 20 | WNW 15 - 25 | NW 15 - 25 | --- - | NNE 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | NNE 10 - 20 |
| Sunday Afternoon | NNE 15 - 25 |
| Sunday Night | NNE 25 - 35 |
| Monday Morning | NNE 20 - 30 |
| Monday Afternoon | NNW 15 - 25 |
| Monday Night | WNW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Morning | NNE 5 - 15 |
| Sunday Afternoon | NNE 20 - 30 |
| Sunday Night | NNE 15 - 25 |
| Monday Morning | NNE 20 - 30 |
| Monday Afternoon | N 20 - 30 |
| Monday Night | WNW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | N 10 - 20 |
| Sunday Afternoon | N 10 - 20 |
| Sunday Night | NNE 15 - 25 |
| Monday Morning | NNE 20 - 30 |
| Monday Afternoon | NNE 20 - 30 |
| Monday Night | NW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | W 10 - 20 |
| Sunday Afternoon | WNW 5 - 15 |
| Sunday Night | NNE 15 - 25 |
| Monday Morning | NNE 35 - 45 |
| Monday Afternoon | NNE 35 - 50 |
| Monday Night | NNE 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Feb 10, 2018
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