Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Monday & Wednesday
Happy New Year! We have a quiet weather pattern to ring in 2018 with upper ridging offshore and light to moderate offshore flow at the surface. Freezing levels will be mild over the short term period with cooler temperatures seen along the east slopes of the Cascades and in the Cascades Passes. Brisk W-NW winds seen at some of the higher elevation NWAC weather stations this morning will ease off during the day. A weak front dissipating over Vancouver Island should bring some periods of high clouds today. Low clouds should hang tough along the east slopes of the Cascades and lower slopes of the Cascade Passes throughout the short term. A weak upper level disturbance cutting through the upper level ridge on Tuesday will not bring any precipitation but will produce some high/mid level cloudiness over the region.
Weather Forecast
Olympics
| Monday | Partly sunny and mild with periods of high clouds. |
| Monday Night | Partly cloudy and mild with periods of high clouds. |
| Tuesday | Mostly cloudy. Mild. |
| Tuesday Night | Mostly cloudy. Mild. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Monday | Partly sunny with periods of high clouds west of the crest. Lower clouds and cooler temperatures Cascade Passes. |
| Monday Night | Partly cloudy with periods of high clouds west of the crest. Lower clouds and cooler temperatures Cascade Passes. |
| Tuesday | Mostly cloudy. Lower clouds Cascade Passes. |
| Tuesday Night | Mostly cloudy. Lower clouds Cascade Passes. |
East Slopes of the Washington Cascades
| Monday | Partly sunny with periods of high clouds, low clouds lower slopes. |
| Monday Night | Partly cloudy with periods of high clouds, low clouds lower slopes. |
| Tuesday | Mostly cloudy. Low clouds lower slopes. |
| Tuesday Night | Mostly cloudy. Low clouds lower slopes. |
Mt. Hood
| Monday | Partly sunny with periods of high clouds. |
| Monday Night | Partly cloudy with periods of high clouds. Cooler and cloudier lower elevations exposed to easterly flow. |
| Tuesday | Mostly cloudy. Cooler and cloudier lower elevations exposed to easterly flow. |
| Tuesday Night | Mostly cloudy. |
Issued: 7:22 AM PST Monday, January 1, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Morning | Snow Level * | 8000' | 7000' | 0' | ' | ' | 6000' | ' | 9000' |
| Monday Afternoon | Snow Level * | 9000' | 8000' | 5000' | ' | ' | 8000' | ' | 9000' |
| Monday Night | Snow Level * | 9500' | 8000' | 3000' | ' | ' | 8500' | ' | 9000' |
| Tuesday | Snow Level * | 9500' | 8500' | 5000' | ' | ' | 8500' | ' | 9000' |
| Tuesday Night | Snow Level * | 9500' | 8500' | 3000' | ' | ' | 8500' | ' | 9000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning |
Snow Level 8000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 9000' (Easterly Flow *) |
| Monday Night |
Snow Level 9500' (Easterly Flow *) |
| Tuesday |
Snow Level 9500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 9500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning |
Snow Level 7000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 8000' (Easterly Flow *) |
| Monday Night |
Snow Level 8000' (Easterly Flow *) |
| Tuesday |
Snow Level 8500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 8500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level 0' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Monday Night |
Snow Level 3000' (Easterly Flow *) |
| Tuesday |
Snow Level 5000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Morning |
Snow Level ' (Easterly Flow *) |
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Tuesday |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level ' (Easterly Flow *) |
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Tuesday |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level 6000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 8000' (Easterly Flow *) |
| Monday Night |
Snow Level 8500' (Easterly Flow *) |
| Tuesday |
Snow Level 8500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 8500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Morning |
Snow Level ' (Easterly Flow *) |
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Tuesday |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning |
Snow Level 9000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 9000' (Easterly Flow *) |
| Monday Night |
Snow Level 9000' (Easterly Flow *) |
| Tuesday |
Snow Level 9000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 9000' (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 | 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: 7:22 AM PST Monday, January 1, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Morning | W 0 - 10 | VAR 0 - 10 | W 0 - 10 | --- - | SW 0 - 10 |
| Monday Afternoon | VAR 0 - 10 | VAR 0 - 10 | VAR 0 - 10 | --- - | E 0 - 10 |
| Monday Night | SE 0 - 10 | ESE 0 - 10 | E 0 - 10 | --- - | ESE 0 - 10 |
| Tuesday | S 0 - 10 | ENE 0 - 10 | ESE 10 - 20 | --- - | ESE 10 - 20 |
| Tuesday Night | SE 0 - 10 | VAR 0 - 10 | E 0 - 10 | --- - | ESE 0 - 10 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | SE 0 - 10 |
| Tuesday | S 0 - 10 |
| Tuesday Night | SE 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | ESE 0 - 10 |
| Tuesday | ENE 0 - 10 |
| Tuesday Night | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | E 0 - 10 |
| Tuesday | ESE 10 - 20 |
| Tuesday Night | E 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning | SW 0 - 10 |
| Monday Afternoon | E 0 - 10 |
| Monday Night | ESE 0 - 10 |
| Tuesday | ESE 10 - 20 |
| Tuesday Night | ESE 0 - 10 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | SE 0 - 10 |
| Tuesday | S 0 - 10 |
| Tuesday Night | SE 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | ESE 0 - 10 |
| Tuesday | ENE 0 - 10 |
| Tuesday Night | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | E 0 - 10 |
| Tuesday | ESE 10 - 20 |
| Tuesday Night | E 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | SW 0 - 10 |
| Monday Afternoon | E 0 - 10 |
| Monday Night | ESE 0 - 10 |
| Tuesday | ESE 10 - 20 |
| Tuesday Night | ESE 0 - 10 |
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 Morning | NW 15 - 25 | NW 15 - 25 | NW 15 - 25 | --- - | NW 10 - 20 |
| Monday Afternoon | NW 10 - 20 | NW 5 - 15 | NW 10 - 20 | --- - | NW 5 - 15 |
| Monday Night | SW 0 - 10 | SW 0 - 10 | SW 0 - 10 | --- - | SW 5 - 15 |
| Tuesday | SW 5 - 15 | SW 5 - 15 | SW 5 - 15 | --- - | SW 10 - 20 |
| Tuesday Night | W 0 - 10 | W 0 - 10 | W 5 - 15 | --- - | SW 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | NW 15 - 25 |
| Monday Afternoon | NW 10 - 20 |
| Monday Night | SW 0 - 10 |
| Tuesday | SW 5 - 15 |
| Tuesday Night | W 0 - 10 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Morning | NW 15 - 25 |
| Monday Afternoon | NW 5 - 15 |
| Monday Night | SW 0 - 10 |
| Tuesday | SW 5 - 15 |
| Tuesday Night | W 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | NW 15 - 25 |
| Monday Afternoon | NW 10 - 20 |
| Monday Night | SW 0 - 10 |
| Tuesday | SW 5 - 15 |
| Tuesday Night | W 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | NW 10 - 20 |
| Monday Afternoon | NW 5 - 15 |
| Monday Night | SW 5 - 15 |
| Tuesday | SW 10 - 20 |
| Tuesday Night | SW 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Dec 29, 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.