Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Saturday & Saturday
A strong upper ridge of high pressure remains will remain far enough offshore that the Pacific Northwest will experience low freezing/snow levels through the weekend.
Light northerly flow will predominate on Saturday morning, allowing a cool, Canadian airmass to infiltrate the region. Temperatures at Washington Pass were in the single digits this mornning, with most NWAC stations in the 10's and 20's. Temperatures will rebound during the day Saturday the offshore high influences the weather without the major warming that we've seen in recent episodes. The weak ridging will keep clear skies over most of the Pacific Northwest overnight Saturday and surface temperatures will once again cool significantly. The flow will shift to westerly as a moisture-starved upper-level and surface closed low will approach from the northwest.
This low will approach the near-shore waters late Saturday night and by Sunday morning it will be located several hundred miles off the coast of Washington. It could bring some light snow to the Olympics in the early morning hours on Sunday.
The low will continue S-SW toward the central Oregon coast, bringing a chance of some very light snow showers to the mountains, with the best chance of a few inches of snow at Mt. Hood. Most of the Washington Cascades and Olympics should see less than an inch of snow or nothing depending on how close to shore the low tracks.
Sunday night, snow showers will linger in the Mt. Hood area during the evening hours, but elsewhere expect skies to clear as the system moves south with weak NE flow accompanying as a high pressure builds offshore once again. Snow levels will fall to very close to sea level.
Weather Forecast
Olympics
| Saturday | Morning clouds with some up-slope flow and afternoon sun. |
| Saturday Night | Clouds with a chance of light snow showers by morning. |
| Sunday | Chance of light snow showers, mainly as the flow turns northerly in the early afternoon hours. |
| Sunday Night | Clearing skies. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Saturday | Clear and fair. |
| Saturday Night | Mostly clear. Some fog in the lowlands. |
| Sunday | A mix of clouds and sun with some light snow showers. |
| Sunday Night | Clearing skies. |
East Slopes of the Washington Cascades
| Saturday | Clear and fair. |
| Saturday Night | Mostly clear. Fog and low clouds developing in some lowland locations or deep valleys. |
| Sunday | Partly cloudy with a chance of light snow showers. |
| Sunday Night | Mostly clear. Fog and low clouds developing in some lowland locations or deep valleys. |
Mt. Hood
| Saturday | Clear and fair. |
| Saturday Night | Mostly clear. Some very low clouds or fog. |
| Sunday | Increasing clouds with light snow developing during the morning hours. and becoming light snow showers during the afternoon. |
| Sunday Night | Light snow showers continuing during the evening with partly cloudy skies after midnight. |
Issued: 7:36 AM PST Saturday, February 10, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Saturday Morning | Freezing Level | 2500' | 2000' | 2000' | ' | ' | 2500' | ' | 3000' |
| Saturday Afternoon | Freezing Level | 3000' | 3000' | 3500' | ' | ' | 4000' | ' | 4500' |
| Saturday Night | Snow Level | 1500' | 1500' | 1500' | ' | ' | 2500' | ' | 5500' |
| Sunday Morning | Snow Level | 1500' | 1000' | 1000' | ' | ' | 2000' | ' | 2500' |
| Sunday Afternoon | Snow Level | 500' | 0' | 0' | ' | ' | 1500' | ' | 1500' |
| Sunday Night | Snow Level * | 0' | 0' | 0' | ' | ' | 500' | ' | 0' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Morning |
Freezing Level 2500' |
| Saturday Afternoon |
Freezing Level 3000' |
| Saturday Night |
Snow Level 1500' |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 500' |
| Sunday Night |
Snow Level 0' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Saturday Morning |
Freezing Level 2000' |
| Saturday Afternoon |
Freezing Level 3000' |
| Saturday Night |
Snow Level 1500' |
| Sunday Morning |
Snow Level 1000' |
| Sunday Afternoon |
Snow Level 0' |
| Sunday Night |
Snow Level 0' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Saturday Morning |
Freezing Level 2000' |
| Saturday Afternoon |
Freezing Level 3500' |
| Saturday Night |
Snow Level 1500' |
| Sunday Morning |
Snow Level 1000' |
| Sunday Afternoon |
Snow Level 0' |
| Sunday Night |
Snow Level 0' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Saturday Morning |
Freezing Level ' |
| Saturday Afternoon |
Freezing Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Saturday Morning |
Freezing Level ' |
| Saturday Afternoon |
Freezing Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Morning |
Freezing Level 2500' |
| Saturday Afternoon |
Freezing Level 4000' |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 1500' |
| Sunday Night |
Snow Level 500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Morning |
Freezing Level ' |
| Saturday Afternoon |
Freezing Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Saturday Morning |
Freezing Level 3000' |
| Saturday Afternoon |
Freezing Level 4500' |
| Saturday Night |
Snow Level 5500' |
| Sunday Morning |
Snow Level 2500' |
| Sunday Afternoon |
Snow Level 1500' |
| Sunday Night |
Snow Level 0' (Easterly Flow *) |
* 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 0.25 |
| Timberline | LT 0.10 | 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: 7:36 AM PST Saturday, February 10, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Morning | VAR 0 - 10 | VAR 0 - 10 | W 5 - 15 | --- - | E 5 - 15 |
| Saturday Afternoon | W 10 - 20 | WSW 5 - 15 | W 5 - 15 | --- - | VAR 0 - 10 |
| Saturday Night | W 10 - 20 | SW 5 - 15 | W 10 - 20 | --- - | W 15 - 25 |
| Sunday Morning | N 0 - 10 | W 5 - 15 | W 5 - 15 | --- - | W 10 - 20 |
| Sunday Afternoon | N 5 - 15 | N 5 - 15 | NNW 5 - 15 | --- - | WNW 5 - 15 |
| Sunday Night | NE 10 - 20 | NNE 10 - 20 | VAR 0 - 10 | --- - | NE 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Morning | VAR 0 - 10 |
| Saturday Afternoon | W 10 - 20 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | N 0 - 10 |
| Sunday Afternoon | N 5 - 15 |
| Sunday Night | NE 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Morning | VAR 0 - 10 |
| Saturday Afternoon | WSW 5 - 15 |
| Saturday Night | SW 5 - 15 |
| Sunday Morning | W 5 - 15 |
| Sunday Afternoon | N 5 - 15 |
| Sunday Night | NNE 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Morning | W 5 - 15 |
| Saturday Afternoon | W 5 - 15 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | W 5 - 15 |
| Sunday Afternoon | NNW 5 - 15 |
| Sunday Night | VAR 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Saturday Morning | E 5 - 15 |
| Saturday Afternoon | VAR 0 - 10 |
| Saturday Night | W 15 - 25 |
| Sunday Morning | W 10 - 20 |
| Sunday Afternoon | WNW 5 - 15 |
| Sunday Night | NE 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Morning | VAR 0 - 10 |
| Saturday Afternoon | W 10 - 20 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | N 0 - 10 |
| Sunday Afternoon | N 5 - 15 |
| Sunday Night | NE 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Morning | VAR 0 - 10 |
| Saturday Afternoon | WSW 5 - 15 |
| Saturday Night | SW 5 - 15 |
| Sunday Morning | W 5 - 15 |
| Sunday Afternoon | N 5 - 15 |
| Sunday Night | NNE 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Morning | W 5 - 15 |
| Saturday Afternoon | W 5 - 15 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | W 5 - 15 |
| Sunday Afternoon | NNW 5 - 15 |
| Sunday Night | VAR 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Morning | E 5 - 15 |
| Saturday Afternoon | VAR 0 - 10 |
| Saturday Night | W 15 - 25 |
| Sunday Morning | W 10 - 20 |
| Sunday Afternoon | WNW 5 - 15 |
| Sunday Night | NE 10 - 20 |
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 | NW 15 - 25 | NNW 20 - 30 | NNW 15 - 25 | --- - | NNE 25 - 35 |
| Saturday Afternoon | W 25 - 35 | W 20 - 30 | W 25 - 35 | --- - | NNW 10 - 20 |
| Saturday Night | W 20 - 30 | W 20 - 30 | W 30 - 40 | --- - | W 30 - 40 |
| Sunday Morning | NNE 10 - 20 | NNE 5 - 15 | WNW 15 - 25 | --- - | W 30 - 40 |
| Sunday Afternoon | N 15 - 25 | N 20 - 30 | ENE 10 - 20 | --- - | NW 20 - 30 |
| Sunday Night | NE 25 - 35 | NNE 20 - 30 | N 15 - 25 | --- - | NNE 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Morning | NW 15 - 25 |
| Saturday Afternoon | W 25 - 35 |
| Saturday Night | W 20 - 30 |
| Sunday Morning | NNE 10 - 20 |
| Sunday Afternoon | N 15 - 25 |
| Sunday Night | NE 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Morning | NNW 20 - 30 |
| Saturday Afternoon | W 20 - 30 |
| Saturday Night | W 20 - 30 |
| Sunday Morning | NNE 5 - 15 |
| Sunday Afternoon | N 20 - 30 |
| Sunday Night | NNE 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Morning | NNW 15 - 25 |
| Saturday Afternoon | W 25 - 35 |
| Saturday Night | W 30 - 40 |
| Sunday Morning | WNW 15 - 25 |
| Sunday Afternoon | ENE 10 - 20 |
| Sunday Night | N 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Morning | NNE 25 - 35 |
| Saturday Afternoon | NNW 10 - 20 |
| Saturday Night | W 30 - 40 |
| Sunday Morning | W 30 - 40 |
| Sunday Afternoon | NW 20 - 30 |
| Sunday Night | NNE 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Feb 7, 2018
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.