Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Monday & Saturday
Broken skies this morning have become more solidly overcast this afternoon as mid and high level clouds stream over the area in brisk westerly flow aloft. After a period of mild freezing/snow levels seen over the last several days, a significant cool down will begin tonight for the north Cascades and Olympics, eventually affecting the entire range as strong surface high pressure in northern B.C. begins to slide south pushing arctic air into eastern Washington and Oregon over the short term. Light snow may develop along a baroclinc band over the S WA/N OR border overnight, mainly affecting the south and central Washington Cascades through Tuesday afternoon. Alpine winds will decrease over the north Washington Cascades today but remain elevated over Mt. Hood. Offshore flow and east winds will begin to ramp up Tuesday night as the aforementioned high pressure builds east of the crest.
Weather Forecast
Olympics
| Monday |
Mostly cloudy this morning with increasing clouds this afternoon. |
| Monday Night - Tuesday Morning |
Mostly cloudy. Turning colder. |
| Tuesday Afternoon |
Mostly sunny except partly cloudy north slopes of the Olympics. |
| Tuesday Night |
Partly cloudy with light upslope snow showers possible north slopes of the Olympics. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Monday |
Mostly cloudy this morning with increasing clouds this afternoon. Slight chance of very light rain or snow showers. |
| Monday Night - Tuesday Morning |
Mostly cloudy north Cascades. Cloudy south and central Cascades with scattered light snow showers. Turning colder. |
| Tuesday Afternoon |
Mostly sunny north Cascades. Partly sunny central and south Cascades with isolated light snow showers in the afternoon. Continued cooling trend. |
| Tuesday Night |
Mostly clear. Cold. |
East slopes of the Washington Cascades
| Monday |
Mostly cloudy this morning with increasing high and mid clouds this afternoon. Slight chance of very light rain or snow showers. |
| Monday Night - Tuesday Morning |
Mostly cloudy northeast Cascades with scattered light snow showers. Cloudy southeast and central-east Cascades with light snow showers. Turning colder. |
| Tuesday Afternoon |
Mostly sunny northeast Cascades. Partly to mostly cloudy central-east and southeast Cascades with scattered light snow showers. Continued cooling trend. |
| Tuesday Night |
Partly to mostly clear. Cold. |
Mt. Hood Area
| Monday |
Mostly cloudy this morning with increasing clouds this afternoon. Slight chance of very light rain or snow showers. Mild. |
| Monday Night |
Cloudy with light rain and snow showers. |
| Tuesday - Tuesday Night |
Cloudy with light snow showers. Cooling trend. |
Issued: 2:16 PM PST Monday, January 30, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Afternoon | Freezing Level | 4000' | 3500' | 2000' | ' | ' | 4000' | ' | 7000' |
| Monday Night - Tuesday Morning | Snow Level | 500' | 500' | 0' | ' | ' | 1000' | ' | 3000' |
| Tuesday Afternoon | Snow Level * | 500' | 0' | 0' | ' | ' | 500' | ' | 1500' |
| Tuesday Night | Freezing Level * | 0' | 0' | 0' | ' | ' | 0' | ' | 0' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level 4000' |
| Monday Night - Tuesday Morning |
Snow Level 500' |
| Tuesday Afternoon |
Snow Level 500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 0' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level 3500' |
| Monday Night - Tuesday Morning |
Snow Level 500' |
| Tuesday Afternoon |
Snow Level 0' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 0' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level 2000' |
| Monday Night - Tuesday Morning |
Snow Level 0' |
| Tuesday Afternoon |
Snow Level 0' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 0' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Freezing Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Freezing Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level 4000' |
| Monday Night - Tuesday Morning |
Snow Level 1000' |
| Tuesday Afternoon |
Snow Level 500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 0' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Freezing Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level 7000' |
| Monday Night - Tuesday Morning |
Snow Level 3000' |
| Tuesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Night |
Freezing 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 0.25 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 |
| Paradise | LT 0.10 | LT 0.10 |
| White Pass | LT 0.25 | 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: 2:16 PM PST Monday, January 30, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday | W 0 - 10 | W 0 - 10 | W 0 - 10 | --- - | W 0 - 10 |
| Monday Night - Tuesday Morning | N 0 - 10 | NE 5 - 15 | NW 0 - 10 | --- - | W 5 - 15 |
| Tuesday Afternoon | ENE 10 - 20 | NE 10 - 20 | E 5 - 15 | --- - | E 0 - 10 |
| Tuesday Night | ENE 15 - 25 | ENE 15 - 25 | E 10 - 20 | --- - | E 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday | W 0 - 10 |
| Monday Night - Tuesday Morning | N 0 - 10 |
| Tuesday Afternoon | ENE 10 - 20 |
| Tuesday Night | ENE 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Monday | W 0 - 10 |
| Monday Night - Tuesday Morning | NE 5 - 15 |
| Tuesday Afternoon | NE 10 - 20 |
| Tuesday Night | ENE 15 - 25 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday | W 0 - 10 |
| Monday Night - Tuesday Morning | NW 0 - 10 |
| Tuesday Afternoon | E 5 - 15 |
| Tuesday Night | E 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Monday | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday | W 0 - 10 |
| Monday Night - Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | E 0 - 10 |
| Tuesday Night | E 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday | W 0 - 10 |
| Monday Night - Tuesday Morning | N 0 - 10 |
| Tuesday Afternoon | ENE 10 - 20 |
| Tuesday Night | ENE 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday | W 0 - 10 |
| Monday Night - Tuesday Morning | NE 5 - 15 |
| Tuesday Afternoon | NE 10 - 20 |
| Tuesday Night | ENE 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday | W 0 - 10 |
| Monday Night - Tuesday Morning | NW 0 - 10 |
| Tuesday Afternoon | E 5 - 15 |
| Tuesday Night | E 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday | W 0 - 10 |
| Monday Night - Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | E 0 - 10 |
| Tuesday Night | E 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 | |
|---|---|---|---|---|---|
| Monday Afternoon | W 10 - 20 | W 10 - 20 | W 20 - 30 | --- - | W 35 - 45 |
| Monday Night - Tuesday Morning | W 0 - 10 | NW 0 - 10 | W 20 - 30 | --- - | W 35 - 50 |
| Tuesday Afternoon | NE 5 - 15 | NE 5 - 15 | W 5 - 15 | --- - | W 25 - 35 |
| Tuesday Night | NE 10 - 20 | NE 5 - 15 | SW 0 - 10 | --- - | SW 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon | W 10 - 20 |
| Monday Night - Tuesday Morning | W 0 - 10 |
| Tuesday Afternoon | NE 5 - 15 |
| Tuesday Night | NE 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Afternoon | W 10 - 20 |
| Monday Night - Tuesday Morning | NW 0 - 10 |
| Tuesday Afternoon | NE 5 - 15 |
| Tuesday Night | NE 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon | W 20 - 30 |
| Monday Night - Tuesday Morning | W 20 - 30 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | SW 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon | W 35 - 45 |
| Monday Night - Tuesday Morning | W 35 - 50 |
| Tuesday Afternoon | W 25 - 35 |
| Tuesday 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.
Issued: 2:16 PM PST Monday, January 30, 2017
Extended Weather Synopsis for Saturday night through Saturday
Arctic air will make a brief re-appearance during the middle of the week. Moisture supplied by an upper level low well off the California coast should override the dry arctic air mass inland creating a sharp E-W boundary of light snow and cloud cover that oscillates around the Oregon and Washington border Wednesday and Thursday, mainly affecting Mt. Hood. Clearer conditions should be found over the Olympics and central and north Washington Cascades with moderate east winds at Pass and crest level . The upper low off the California coast should meander closer to the coast and turn the flow aloft more southwesterly Thursday night, rotating showers up from the south and beginnng the process of moderating the air mass over the region.
Extended Weather
Olympics, Washington Cascades and Mt. Hood
Cold. Mostly clear Olympics and north and central Cascades. Partly to mostly cloudy south Washington Cascades with period of light snow. Cloudy Mt. Hood with occasional light snow. Moderate east winds mainly central and south Washington Cascades and Mt. Hood.
Mostly cloudy with light rain and snow showers. Slow warming trend.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Previous forecast from Jan 30, 2017
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.