Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Sunday & Friday
Some snow returned to the Olympics and Cascades on Saturday and by Sunday morning NWAC stations along the Cascade west slopes had 2-6 inches, with probably about 1-3 inches along the Cascade east slopes and about 5-6 inches at Mt Hood.
A fairly large upper trough will linger over the northeast Pacific Ocean through early next week with the main flow generally to Oregon and California. This will bring some more snow to to the Olympics and Cascades with little change in the fairly low snow levels.
A weakening low pressure system will move past Cape Flattery and to Vancouver Island on Sunday with a front moving across the Northwest. A slight increase in alpine winds should be seen in the Olympics and Cascades. Radar Sunday morning shows that bands of precipitation will move across the area.
A decrease in winds and snow showers should be seen in the Olympics and Cascades as the low and front moves off to the east on Sunday night.
Another weakening low pressure system will move past Astoria on Monday with another front moving mainly across the south Cascades. This should cause an increase in alpine winds mainly in the south Cascades. Snow should increase again on Monday especially in the south Cascades. The south Cascades will be windier and snowier compared to the Olympics and north Cascades on Monday.
Another decrease in winds and snow showers should be seen in the Olympics and Cascades as the second low and front moves off to the east on Monday night.
Weather Forecast
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Sunday Morning |
Slightly increasing alpine winds. Increasing light snow. |
| Sunday Afternoon |
Further slightly increasing alpine winds. Further increasing light snow becoming light to moderate on the volcanoes. |
| Sunday Night |
Decreasing alpine winds. Decreasing light snow showers. |
| Monday |
Increasing alpine winds mainly south part. Increasing light to moderate snow north to central part and Passes, increasing moderate occasional heavy snow south volcanoes. |
| Monday Night |
Decreasing alpine winds and decreasing light snow showers. |
Olympics
| Sunday Morning |
Slightly increasing alpine winds. Increasing light snow. |
| Sunday Afternoon |
Further slightly increasing alpine winds. Further increasing light snow. |
| Sunday Night |
Decreasing alpine winds. Decreasing light snow showers. |
| Monday |
Increasing light snow. |
| Monday Night |
Decreasing light snow showers. |
East slopes of the Washington Cascades
| Sunday Morning |
Slightly increasing alpine winds. Increasing light snow. |
| Sunday Afternoon |
Further slightly increasing alpine winds. Further increasing light snow. |
| Sunday Night |
Decreasing alpine winds. Decreasing light snow showers heaviest higher elevations. |
| Monday |
Increasing alpine winds mainly south part. Increasing light to moderate snow. |
| Monday Night |
Decreasing alpine winds and decreasing light snow showers heaviest higher elevations. |
Mt. Hood Area
| Sunday Morning |
Slightly increasing alpine winds. Increasing light snow. |
| Sunday Afternoon |
Further slightly increasing alpine winds. Further increasing light to moderate snow. |
| Sunday Night |
Decreasing alpine winds. Decreasing light snow showers. |
| Monday |
Increasing alpine winds. Increasing moderate occasional heavy snow in the morning, then decreasing light to moderate snow showers in the afternoon. |
| Monday Night |
Decreasing alpine winds and decreasing light snow showers. |
Issued: 7:12 AM PST Sunday, February 19, 2017
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 * | 2500' | 2500' | 2000' | ' | ' | 2500' | ' | 3000' |
| Sunday Afternoon | Snow Level * | 3000' | 3000' | 3000' | ' | ' | 3000' | ' | 3500' |
| Sunday Night - Monday Morning | Snow Level | 2500' | 2500' | 2000' | ' | ' | 2500' | ' | 3500' |
| Monday Afternoon | Snow Level * | 3000' | 3000' | 3000' | ' | ' | 3000' | ' | 4000' |
| Monday Night | Snow Level | 2000' | 2000' | 2000' | ' | ' | 2500' | ' | 3000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Monday Night |
Snow Level 2000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Monday Night |
Snow Level 2000' |
| Washington Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Monday Night |
Snow Level 2000' |
| Leavenworth | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Monday Night |
Snow Level 2500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning |
Snow Level 3000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level 3500' |
| Monday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Monday Night |
Snow Level 3000' |
* 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 | 0.25 - 0.50 | LT 0.25 |
| Mt Baker Ski Area | 0.75 - 1.00 | 0 - 0.50 |
| Washington Pass | LT 0.25 | 0 - 0.50 |
| Stevens Pass | 0.25 - 0.50 | 0.50 - 0.75 |
| Snoqualmie Pass | 0 - 0.50 | 0.75 - 1.00 |
| Mission Ridge | LT 0.25 | 0.25 - 0.50 |
| Crystal Mt | 0.50 - 0.75 | 0 - 1.00 |
| Paradise | 0.75 - 1.00 | 0 - 1.50 |
| White Pass | 0.25 - 0.50 | 0 - 0.75 |
| Mt Hood Meadows | 0 - 0.75 | 0.75 - 1.00 |
| Timberline | 0 - 0.75 | 0.75 - 1.00 |
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: 7:12 AM PST Sunday, February 19, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Morning | SSW 10 - 20 | SSW 15 - 25 | SSW 10 - 20 | --- - | SW 15 - 25 |
| Sunday Mid-day | SSW 15 - 25 | SSW 20 - 30 | SSW 15 - 25 | --- - | SW 20 - 30 |
| Sunday Afternoon | SSW 20 - 30 | SSW 25 - 35 | SSW 20 - 30 | --- - | SW 25 - 35 |
| Sunday Night | SSE 10 - 20 | SSE 10 - 20 | SSE 10 - 20 | --- - | SSE 10 - 20 |
| Monday Morning | SSE 15 - 25 | SSE 5 - 15 | SSE 20 - 30 | --- - | SSW 25 - 35 |
| Monday Afternoon | NW 5 - 15 | NE 5 - 15 | SSE 20 - 30 | --- - | SW 30 - 45 |
| Monday Night | NW 10 - 20 | NW 5 - 15 | VAR 0 - 10 | --- - | SSE 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning | SSW 10 - 20 |
| Sunday Mid-day | SSW 15 - 25 |
| Sunday Afternoon | SSW 20 - 30 |
| Sunday Night | SSE 10 - 20 |
| Monday Morning | SSE 15 - 25 |
| Monday Afternoon | NW 5 - 15 |
| Monday Night | NW 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning | SSW 15 - 25 |
| Sunday Mid-day | SSW 20 - 30 |
| Sunday Afternoon | SSW 25 - 35 |
| Sunday Night | SSE 10 - 20 |
| Monday Morning | SSE 5 - 15 |
| Monday Afternoon | NE 5 - 15 |
| Monday Night | NW 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning | SSW 10 - 20 |
| Sunday Mid-day | SSW 15 - 25 |
| Sunday Afternoon | SSW 20 - 30 |
| Sunday Night | SSE 10 - 20 |
| Monday Morning | SSE 20 - 30 |
| Monday Afternoon | SSE 20 - 30 |
| Monday Night | VAR 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Morning | --- - |
| Sunday Mid-day | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning | SW 15 - 25 |
| Sunday Mid-day | SW 20 - 30 |
| Sunday Afternoon | SW 25 - 35 |
| Sunday Night | SSE 10 - 20 |
| Monday Morning | SSW 25 - 35 |
| Monday Afternoon | SW 30 - 45 |
| Monday Night | SSE 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Morning | SSW 10 - 20 |
| Sunday Mid-day | SSW 15 - 25 |
| Sunday Afternoon | SSW 20 - 30 |
| Sunday Night | SSE 10 - 20 |
| Monday Morning | SSE 15 - 25 |
| Monday Afternoon | NW 5 - 15 |
| Monday Night | NW 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | SSW 15 - 25 |
| Sunday Mid-day | SSW 20 - 30 |
| Sunday Afternoon | SSW 25 - 35 |
| Sunday Night | SSE 10 - 20 |
| Monday Morning | SSE 5 - 15 |
| Monday Afternoon | NE 5 - 15 |
| Monday Night | NW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | SSW 10 - 20 |
| Sunday Mid-day | SSW 15 - 25 |
| Sunday Afternoon | SSW 20 - 30 |
| Sunday Night | SSE 10 - 20 |
| Monday Morning | SSE 20 - 30 |
| Monday Afternoon | SSE 20 - 30 |
| Monday Night | VAR 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | --- - |
| Sunday Mid-day | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | SW 15 - 25 |
| Sunday Mid-day | SW 20 - 30 |
| Sunday Afternoon | SW 25 - 35 |
| Sunday Night | SSE 10 - 20 |
| Monday Morning | SSW 25 - 35 |
| Monday Afternoon | SW 30 - 45 |
| Monday Night | SSE 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 | |
|---|---|---|---|---|---|
| Sunday Morning | SSW 25 - 35 | SSW 20 - 30 | SSW 20 - 30 | --- - | SSW 30 - 45 |
| Sunday Mid-day | SSW 25 - 35 | SSW 25 - 35 | SSW 25 - 35 | --- - | SSW 30 - 45 |
| Sunday Afternoon | SW 30 - 45 | SW 25 - 35 | SW 30 - 45 | --- - | SW 35 - 50 |
| Sunday Night | SSW 10 - 20 | SSW 15 - 25 | SSW 15 - 25 | --- - | SSW 30 - 45 |
| Monday Morning | SSE 15 - 25 | SSE 30 - 45 | SSW 40 - 60 | --- - | SSW 60 - 80 |
| Monday Afternoon | SW 25 - 35 | SW 30 - 45 | SW 50 - 70 | --- - | SW 60 - 80 |
| Monday Night | VAR 0 - 10 | SSW 5 - 15 | VAR 0 - 10 | --- - | SW 40 - 60 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | SSW 25 - 35 |
| Sunday Mid-day | SSW 25 - 35 |
| Sunday Afternoon | SW 30 - 45 |
| Sunday Night | SSW 10 - 20 |
| Monday Morning | SSE 15 - 25 |
| Monday Afternoon | SW 25 - 35 |
| Monday Night | VAR 0 - 10 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Morning | SSW 20 - 30 |
| Sunday Mid-day | SSW 25 - 35 |
| Sunday Afternoon | SW 25 - 35 |
| Sunday Night | SSW 15 - 25 |
| Monday Morning | SSE 30 - 45 |
| Monday Afternoon | SW 30 - 45 |
| Monday Night | SSW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | SSW 20 - 30 |
| Sunday Mid-day | SSW 25 - 35 |
| Sunday Afternoon | SW 30 - 45 |
| Sunday Night | SSW 15 - 25 |
| Monday Morning | SSW 40 - 60 |
| Monday Afternoon | SW 50 - 70 |
| Monday Night | VAR 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | --- - |
| Sunday Mid-day | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | SSW 30 - 45 |
| Sunday Mid-day | SSW 30 - 45 |
| Sunday Afternoon | SW 35 - 50 |
| Sunday Night | SSW 30 - 45 |
| Monday Morning | SSW 60 - 80 |
| Monday Afternoon | SW 60 - 80 |
| Monday Night | SW 40 - 60 |
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 18, 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.