Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Sunday & Wednesday
An upper level low off the coast of British Columbia will drift north on Sunday while the associated cold upper trough digs south behind a north-south-oriented cold front. The front should cross the Cascade crest early to mid-afternoon on Sunday, bringing moderate winds at crest level with strong gusts mixing down from significant momentum aloft. Modest warming is currently being observed in advance of the front, but easterly winds are keeping the passes and crest colder. Frontal passage should be between 2-4 PM and precipitation should remain snow at Snoqualmie. Mt. Baker has seen significant precipitation with another 15" overnight. More moderate to heavy snow is in the forecast for the Northwest Cascades. Note that as of Sunday morning the Camano Island radar is down.
Behind the front, winds shift to the SW and we enter a cool and showery regime late Sunday afternoon and Sunday night as the shallow trough settles in over the Pacific Northwest.
Showers decrease and generally end during the day on Monday as a weak ridge develops.
Another system enters our coastal waters Monday night.
Weather Forecast
Olympics
| Sunday | Moderate rain and snow in the morning becoming light to moderate showers in the afternoon. Winds are moderate to strong out of the south, turning to the SW. |
| Sunday Night | Light snow showers. |
| Monday | Light snow showers, decreasing or ending in the afternoon. |
| Monday Night | Cloudy with light rain or snow possible by dawn. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Sunday | Moderate rain and snow through the early afternoon hours with heavier intensities expected near Mt. Rainier and particularly Mt. Baker. Later in the afternoon, precipitation becomes light to moderate showers. Moderate, gusty SE crest-level winds becoming moderate SW by late afternoon. |
| Sunday Night | Light snow showers, with occasionally moderate near the volcanoes. |
| Monday | Light to moderate snow showers in the morning, decreasing in the afternoon. Heaviest near Mt. Rainier. |
| Monday Night | Very light snow showers, ending. Otherwise mostly cloudy. |
East Slopes of the Washington Cascades
| Sunday | Moderate rain and snow through the early afternoon hours. Later in the afternoon, precipitation becomes light showers. Moderate, gusty SE crest-level winds becoming moderate SW by late afternoon. |
| Sunday Night | Light rain and snow showers. |
| Monday | Light to moderate snow showers in the morning, becoming partly cloudy in the afternoon. |
| Monday Night | Very light snow showers, ending. Otherwise mostly cloudy. |
Mt. Hood
| Sunday | Increasing moderate rain and snow. Moderate to strong crest-level winds. |
| Sunday Night | Light rain and snow showers, becoming moderate close to morning. |
| Monday | Light to occasional moderate snow showers. |
| Monday Night | Very light snow showers, ending. Otherwise mostly cloudy. |
Issued: 7:50 AM PST Sunday, January 21, 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 * | 4000' | 3000' | 1500' | ' | ' | 2500' | ' | 3000' |
| Sunday Afternoon | Snow Level * | 3000' | 2500' | 2500' | ' | ' | 3000' | ' | 4000' |
| Sunday Night | Snow Level | 2500' | 2000' | 2000' | ' | ' | 2500' | ' | 3000' |
| Monday Morning | Snow Level | 2000' | 2000' | 1500' | ' | ' | 2000' | ' | 3000' |
| Monday Afternoon | Snow Level | 2000' | 2000' | 1500' | ' | ' | 2500' | ' | 3500' |
| Monday Night | Snow Level * | 2000' | 1500' | 1000' | ' | ' | 1500' | ' | 3000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning |
Snow Level 4000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2000' |
| Monday Night |
Snow Level 2000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning |
Snow Level 3000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2000' |
| Monday Night |
Snow Level 1500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 1500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 1500' |
| Monday Afternoon |
Snow Level 1500' |
| Monday Night |
Snow Level 1000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night |
Snow Level ' |
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night |
Snow Level ' |
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Night |
Snow Level 1500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night |
Snow Level ' |
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning |
Snow Level 3000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Sunday Night |
Snow Level 3000' |
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Night |
Snow Level 3000' (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
| Wednesday | Wednesday | |
|---|---|---|
| Hurricane Ridge | 0 - 1.00 | LT 0.25 |
| Mt Baker Ski Area | 2.00 - 2.50 | 0.25 - 0.50 |
| Washington Pass | 0 - 0.75 | 0.25 - 0.50 |
| Stevens Pass | 0.50 - 0.75 | 0.25 - 0.50 |
| Snoqualmie Pass | 0.75 - 1.00 | 0 - 0.50 |
| Mission Ridge | 0 - 0.50 | LT 0.10 |
| Crystal Mt | 0.75 - 1.00 | LT 0.25 |
| Paradise | 1.00 - 1.50 | 0.50 - 0.75 |
| White Pass | 0.25 - 0.50 | 0 - 0.50 |
| Mt Hood Meadows | 0 - 0.50 | 0 - 0.50 |
| Timberline | 0.50 - 0.75 | 0 - 0.50 |
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: 7:50 AM PST Sunday, January 21, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Morning | S 35 - 45 | SE 25 - 35 | SE 15 - 30 | --- - | S 35 - 50 |
| Sunday Afternoon | SW 25 - 35 | SSW 20 - 30 | SW 20 - 30 | --- - | WSW 20 - 30 |
| Sunday Night | SW 20 - 30 | SSW 20 - 30 | SW 25 - 35 | --- - | SW 20 - 30 |
| Monday Morning | WSW 20 - 30 | SW 15 - 25 | WSW 20 - 30 | --- - | WSW 25 - 35 |
| Monday Afternoon | WSW 5 - 15 | SW 10 - 20 | W 10 - 20 | --- - | WSW 10 - 20 |
| Monday Night | S 5 - 15 | SW 5 - 15 | SW 5 - 15 | --- - | SW 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning | S 35 - 45 |
| Sunday Afternoon | SW 25 - 35 |
| Sunday Night | SW 20 - 30 |
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | S 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning | SE 25 - 35 |
| Sunday Afternoon | SSW 20 - 30 |
| Sunday Night | SSW 20 - 30 |
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 10 - 20 |
| Monday Night | SW 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning | SE 15 - 30 |
| Sunday Afternoon | SW 20 - 30 |
| Sunday Night | SW 25 - 35 |
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | W 10 - 20 |
| Monday Night | SW 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning | S 35 - 50 |
| Sunday Afternoon | WSW 20 - 30 |
| Sunday Night | SW 20 - 30 |
| Monday Morning | WSW 25 - 35 |
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | SW 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Morning | S 35 - 45 |
| Sunday Afternoon | SW 25 - 35 |
| Sunday Night | SW 20 - 30 |
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | S 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | SE 25 - 35 |
| Sunday Afternoon | SSW 20 - 30 |
| Sunday Night | SSW 20 - 30 |
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 10 - 20 |
| Monday Night | SW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | SE 15 - 30 |
| Sunday Afternoon | SW 20 - 30 |
| Sunday Night | SW 25 - 35 |
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | W 10 - 20 |
| Monday Night | SW 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | S 35 - 50 |
| Sunday Afternoon | WSW 20 - 30 |
| Sunday Night | SW 20 - 30 |
| Monday Morning | WSW 25 - 35 |
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | SW 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 | SSW 50 - 70 | SSW 60 - 80 | SSW 60 - 80 | --- - | SW 60 - 80 |
| Sunday Afternoon | SSW 35 - 50 | SSW 35 - 50 | SW 35 - 50 | --- - | SW 45 - 65 |
| Sunday Night | SW 30 - 40 | SW 30 - 40 | SW 30 - 40 | --- - | SW 35 - 50 |
| Monday Morning | SW 30 - 40 | SW 30 - 40 | WSW 35 - 50 | --- - | WSW 35 - 50 |
| Monday Afternoon | SW 20 - 30 | SW 20 - 30 | WSW 30 - 40 | --- - | WSW 25 - 35 |
| Monday Night | SW 25 - 35 | SW 20 - 30 | SW 30 - 40 | --- - | SW 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | SSW 50 - 70 |
| Sunday Afternoon | SSW 35 - 50 |
| Sunday Night | SW 30 - 40 |
| Monday Morning | SW 30 - 40 |
| Monday Afternoon | SW 20 - 30 |
| Monday Night | SW 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Morning | SSW 60 - 80 |
| Sunday Afternoon | SSW 35 - 50 |
| Sunday Night | SW 30 - 40 |
| Monday Morning | SW 30 - 40 |
| Monday Afternoon | SW 20 - 30 |
| Monday Night | SW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | SSW 60 - 80 |
| Sunday Afternoon | SW 35 - 50 |
| Sunday Night | SW 30 - 40 |
| Monday Morning | WSW 35 - 50 |
| Monday Afternoon | WSW 30 - 40 |
| Monday Night | SW 30 - 40 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | SW 60 - 80 |
| Sunday Afternoon | SW 45 - 65 |
| Sunday Night | SW 35 - 50 |
| Monday Morning | WSW 35 - 50 |
| Monday Afternoon | WSW 25 - 35 |
| Monday Night | SW 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 Jan 20, 2018
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