Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Monday & Friday
On Monday, a large ridge remains centered over the intermountain west, bringing unseasonably warm temperatures to the higher elevations with a strong inversion near the surface. A weak frontal system will work it's way into our coastal waters during the day. On Monday night, the weakening system should help to flatten the ridge and reduce the inversion as temperatures aloft decrease and more mixing of the atmosphere occurs. The system will bring some clouds to the region, but very little or no precipitation. Tuesday, the ridge axis shifts offshore and re-establishes during the day.
Weather Forecast
Olympics
| Monday |
Mostly sunny and mild. |
| Monday Night |
Clear early, becoming mostly cloudy by morning. |
| Tuesday |
Mostly cloudy, becoming partly cloudy in the afternoon. |
| Tuesday Night |
Partly clear. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Monday |
Mostly sunny with some low clouds in the passes in the morning. |
| Monday Night |
Mostly clear with high clouds increasing by morning. |
| Tuesday |
Mostly cloudy. |
| Tuesday Night |
Becoming mostly clear. |
East slopes of the Washington Cascades
| Monday |
Mostly sunny with low clouds, lower to mid-slope. |
| Monday Night |
Mostly clear with high clouds increasing by morning. |
| Tuesday |
Mostly cloudy. |
| Tuesday Night |
Becoming mostly clear. |
Mt. Hood Area
| Monday |
Mostly sunny with some low clouds in the morning on the east side of the region. |
| Monday Night |
Mostly clear with high clouds increasing by morning. |
| Tuesday |
Mostly cloudy. |
| Tuesday Night |
Becoming mostly clear. |
Issued: 7:33 AM PST Monday, December 11, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Morning | Freezing Level * | 12500' | 12500' | 12500' | ' | ' | 12500' | ' | 13000' |
| Monday Afternoon | Freezing Level * | 11500' | 12000' | 12500' | ' | ' | 12500' | ' | 12500' |
| Monday Night | Freezing Level * | 9000' | 8000' | 9000' | ' | ' | 9500' | ' | 11500' |
| Tuesday Morning | Freezing Level * | 9000' | 8000' | 9000' | ' | ' | 9500' | ' | 11500' |
| Tuesday Afternoon | Freezing Level * | 8500' | 7500' | 7500' | ' | ' | 8000' | ' | 11000' |
| Tuesday Night | Freezing Level * | 10500' | 8500' | 9000' | ' | ' | 10000' | ' | 11500' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning |
Freezing Level 12500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 11500' (Easterly Flow *) |
| Monday Night |
Freezing Level 9000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 8500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 10500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning |
Freezing Level 12500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 12000' (Easterly Flow *) |
| Monday Night |
Freezing Level 8000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 7500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 8500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Morning |
Freezing Level 12500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 12500' (Easterly Flow *) |
| Monday Night |
Freezing Level 9000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 7500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 9000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Morning |
Freezing Level ' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Monday Night |
Freezing Level ' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Freezing Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Morning |
Freezing Level ' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Monday Night |
Freezing Level ' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Freezing Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning |
Freezing Level 12500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 12500' (Easterly Flow *) |
| Monday Night |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 10000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Morning |
Freezing Level ' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Monday Night |
Freezing Level ' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Freezing Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning |
Freezing Level 13000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 12500' (Easterly Flow *) |
| Monday Night |
Freezing Level 11500' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 11500' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 11000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 11500' (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
| Friday | Friday | |
|---|---|---|
| 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: 7:33 AM PST Monday, December 11, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Morning | SE 5 - 15 | E 0 - 10 | ESE 15 - 25 | --- - | ESE 10 - 20 |
| Monday Afternoon | SSW 5 - 15 | S 10 - 20 | VAR 0 - 10 | --- - | SW 0 - 10 |
| Monday Night | SSW 5 - 15 | S 10 - 20 | W 5 - 15 | --- - | WSW 5 - 15 |
| Tuesday Morning | SSW 0 - 10 | S 5 - 15 | W 5 - 15 | --- - | W 0 - 10 |
| Tuesday Afternoon | SW 0 - 10 | SSW 0 - 10 | W 5 - 15 | --- - | W 5 - 15 |
| Tuesday Night | VAR 0 - 10 | VAR 0 - 10 | VAR 0 - 10 | --- - | VAR 0 - 10 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning | SE 5 - 15 |
| Monday Afternoon | SSW 5 - 15 |
| Monday Night | SSW 5 - 15 |
| Tuesday Morning | SSW 0 - 10 |
| Tuesday Afternoon | SW 0 - 10 |
| Tuesday Night | VAR 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning | E 0 - 10 |
| Monday Afternoon | S 10 - 20 |
| Monday Night | S 10 - 20 |
| Tuesday Morning | S 5 - 15 |
| Tuesday Afternoon | SSW 0 - 10 |
| Tuesday Night | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning | ESE 15 - 25 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | VAR 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning | ESE 10 - 20 |
| Monday Afternoon | SW 0 - 10 |
| Monday Night | WSW 5 - 15 |
| Tuesday Morning | W 0 - 10 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | VAR 0 - 10 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Morning | SE 5 - 15 |
| Monday Afternoon | SSW 5 - 15 |
| Monday Night | SSW 5 - 15 |
| Tuesday Morning | SSW 0 - 10 |
| Tuesday Afternoon | SW 0 - 10 |
| Tuesday Night | VAR 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | E 0 - 10 |
| Monday Afternoon | S 10 - 20 |
| Monday Night | S 10 - 20 |
| Tuesday Morning | S 5 - 15 |
| Tuesday Afternoon | SSW 0 - 10 |
| Tuesday Night | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | ESE 15 - 25 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | VAR 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | ESE 10 - 20 |
| Monday Afternoon | SW 0 - 10 |
| Monday Night | WSW 5 - 15 |
| Tuesday Morning | W 0 - 10 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | VAR 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 | SSW 10 - 20 | SW 5 - 15 | SW 0 - 10 | --- - | S 10 - 20 |
| Monday Afternoon | SSW 20 - 30 | SSW 20 - 30 | SSW 15 - 25 | --- - | SSW 15 - 25 |
| Monday Night | SW 35 - 50 | WSW 30 - 40 | WSW 25 - 35 | --- - | WSW 15 - 25 |
| Tuesday Morning | SW 35 - 50 | WSW 30 - 40 | WSW 25 - 35 | --- - | WSW 15 - 25 |
| Tuesday Afternoon | WSW 15 - 25 | WSW 10 - 20 | W 25 - 35 | --- - | W 15 - 25 |
| Tuesday Night | WNW 5 - 15 | WNW 10 - 20 | WNW 10 - 20 | --- - | WNW 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | SSW 10 - 20 |
| Monday Afternoon | SSW 20 - 30 |
| Monday Night | SW 35 - 50 |
| Tuesday Morning | SW 35 - 50 |
| Tuesday Afternoon | WSW 15 - 25 |
| Tuesday Night | WNW 5 - 15 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Morning | SW 5 - 15 |
| Monday Afternoon | SSW 20 - 30 |
| Monday Night | WSW 30 - 40 |
| Tuesday Morning | WSW 30 - 40 |
| Tuesday Afternoon | WSW 10 - 20 |
| Tuesday Night | WNW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | SW 0 - 10 |
| Monday Afternoon | SSW 15 - 25 |
| Monday Night | WSW 25 - 35 |
| Tuesday Morning | WSW 25 - 35 |
| Tuesday Afternoon | W 25 - 35 |
| Tuesday Night | WNW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | S 10 - 20 |
| Monday Afternoon | SSW 15 - 25 |
| Monday Night | WSW 15 - 25 |
| Tuesday Morning | WSW 15 - 25 |
| Tuesday Afternoon | W 15 - 25 |
| Tuesday Night | WNW 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 6, 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.