Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Saturday & Thursday
A cool upper trough will drop south from the Gulf of Alaska on Saturday, while out ahead of it, a stationary cold front extends through the Olympics into the north Cascades as of Saturday morning. The location of the stationary front will continue to focus a relatively narrow band of moderate to occasionally heavy precipitation, primarily over the central and south Washington Cascades. Precipitation is likely to decrease slightly during the mid-day hours before a wave rides up along the front, re-intensifying the rain and snow and spreading it back into the Olympics and north Cascades during the afternoon into the evening hours. Mild temperatures will keep snow levels generally above pass level to the south of the frontal boundary, with slightly cooler conditions over the Olympics and northwest Cascades.
The front will push south and east late Saturday night, shifting the precipitation south to the Mt. Hood area, but it will not bring much more than diurnal cooling.
As the upper trough moves into our offshore waters on Sunday, a new surface feature will slide north, extending light to moderate rain and snow showers throughout the Cascades. Expect some convection with cool air aloft as the upper level trough continues moving into the region.
Sunday night the upper low moves over the Pacific Northwest coast, bringing cooling. A surface low develops east of the Cascades, allowing moderate Westerly winds pass through our region as the surface low slides north into southern British Columbia.
Weather Forecast
Olympics
| Saturday | Filtered sunlight in the morning with clouds increasing and a chance of light rain or snow developing in the afternoon. |
| Saturday Night | Light rain or snow during the evening with mostly high clouds after midnight. |
| Sunday | Filtered sunlight with cumulus clouds building during the afternoon and a chance of a rain or snow shower. |
| Sunday Night | A chance of light rain or snow showers. Cooler. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Saturday | Decreasing moderate rain and snow central and south Cascades in the morning, mostly cloudy with some light rain or snow, north. Increasing moderate rain and snow spreading throughout the Cascades in the afternoon. |
| Saturday Night | Moderate to occasionally heavy rain and snow during the evening hours. Becoming light rain and snow showers after midnight. |
| Sunday | Mostly cloudy with high clouds above with light rain and snow spreading from south to north during the afternoon. Heaviest precipitation in the south. Expect some convective precipitation with locally heavy amounts in the afternoon. |
| Sunday Night | Light rain and snow showers with locally heavier amounts. |
East Slopes of the Washington Cascades
| Saturday | Decreasing light to moderate rain and snow central and south Cascades in the morning, with mostly light rain or snow north. Increasing moderate rain and snow spreading throughout the Cascades in the afternoon. |
| Saturday Night | Moderate rain and snow during the evening hours. Becoming light rain and snow showers mainly near the Cascade crest after midnight. |
| Sunday | Mostly cloudy with high clouds above with light rain and snow spreading from south to north during the afternoon. Heaviest precipitation in the south. Expect some convective precipitation with locally heavy amounts in the afternoon. |
| Sunday Night | Light rain and snow showers with locally heavier amounts. |
Mt. Hood
| Saturday | Mostly cloudy with a chance of a light rain or snow shower, particularly late in the day. |
| Saturday Night | Light rain and snow. |
| Sunday | Moderate rain and snow. Convection likely during the afternoon. |
| Sunday Night | Light to occasionally moderate rain and snow showers. |
Issued: 8:43 AM PDT Saturday, April 14, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Saturday Morning | Snow Level | 4000' | 4000' | 5000' | ' | ' | 4000' | ' | 5000' |
| Saturday Afternoon | Snow Level | 3500' | 4000' | 5000' | ' | ' | 5000' | ' | 5500' |
| Saturday Night | Snow Level | 2500' | 3000' | 35000' | ' | ' | 4000' | ' | 4500' |
| Sunday Morning | Snow Level | 2500' | 3500' | 4500' | ' | ' | 4000' | ' | 5000' |
| Sunday Afternoon | Snow Level | 3000' | 4000' | 5000' | ' | ' | 4500' | ' | 4500' |
| Sunday Night | Snow Level | 2500' | 3000' | 3500' | ' | ' | 3000' | ' | 2500' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Morning |
Snow Level 4000' |
| Saturday Afternoon |
Snow Level 3500' |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Snow Level 2500' |
| Sunday Afternoon |
Snow Level 3000' |
| Sunday Night |
Snow Level 2500' |
| Mt. Baker | Elevation |
|---|---|
| Saturday Morning |
Snow Level 4000' |
| Saturday Afternoon |
Snow Level 4000' |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 3500' |
| Sunday Afternoon |
Snow Level 4000' |
| Sunday Night |
Snow Level 3000' |
| Washington Pass | Elevation |
|---|---|
| Saturday Morning |
Snow Level 5000' |
| Saturday Afternoon |
Snow Level 5000' |
| Saturday Night |
Snow Level 35000' |
| Sunday Morning |
Snow Level 4500' |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Night |
Snow Level 3500' |
| Leavenworth | Elevation |
|---|---|
| Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Morning |
Snow Level 4000' |
| Saturday Afternoon |
Snow Level 5000' |
| Saturday Night |
Snow Level 4000' |
| Sunday Morning |
Snow Level 4000' |
| Sunday Afternoon |
Snow Level 4500' |
| Sunday Night |
Snow Level 3000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Saturday Morning |
Snow Level 5000' |
| Saturday Afternoon |
Snow Level 5500' |
| Saturday Night |
Snow Level 4500' |
| Sunday Morning |
Snow Level 5000' |
| Sunday Afternoon |
Snow Level 4500' |
| Sunday Night |
Snow Level 2500' |
* 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
| Thursday | Thursday | |
|---|---|---|
| Hurricane Ridge | 0.25 - 0.50 | LT 0.25 |
| Mt Baker Ski Area | 0 - 0.75 | 0 - 0.50 |
| Washington Pass | 0 - 0.50 | 0.50 - 0.75 |
| Stevens Pass | 0.75 - 1.00 | 0 - 0.50 |
| Snoqualmie Pass | 0 - 1.50 | 0 - 0.50 |
| Mission Ridge | LT 0.25 | 0.25 - 0.50 |
| Crystal Mt | 0.50 - 0.75 | 0.25 - 0.50 |
| Paradise | 0 - 2.00 | 0 - 0.75 |
| White Pass | 0 - 0.50 | 0 - 0.50 |
| Mt Hood Meadows | LT 0.25 | 0.75 - 1.00 |
| Timberline | 0.25 - 0.50 | 0 - 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: 8:43 AM PDT Saturday, April 14, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Morning | SSW 15 - 25 | SSW 10 - 20 | SSW 15 - 25 | --- - | SW 15 - 25 |
| Saturday Afternoon | SW 10 - 20 | S 5 - 15 | S 10 - 20 | --- - | SW 20 - 30 |
| Saturday Night | WSW 0 - 10 | S 0 - 10 | W 5 - 15 | --- - | WSW 15 - 25 |
| Sunday Morning | E 5 - 15 | E 5 - 15 | E 5 - 15 | --- - | S 10 - 20 |
| Sunday Afternoon | N 5 - 15 | N 5 - 15 | VAR 0 - 10 | --- - | W 5 - 15 |
| Sunday Night | W 10 - 20 | WSW 5 - 15 | W 15 - 25 | --- - | W 20 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Morning | SSW 15 - 25 |
| Saturday Afternoon | SW 10 - 20 |
| Saturday Night | WSW 0 - 10 |
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | N 5 - 15 |
| Sunday Night | W 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Morning | SSW 10 - 20 |
| Saturday Afternoon | S 5 - 15 |
| Saturday Night | S 0 - 10 |
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | N 5 - 15 |
| Sunday Night | WSW 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Morning | SSW 15 - 25 |
| Saturday Afternoon | S 10 - 20 |
| Saturday Night | W 5 - 15 |
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | VAR 0 - 10 |
| Sunday Night | W 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Saturday Morning | SW 15 - 25 |
| Saturday Afternoon | SW 20 - 30 |
| Saturday Night | WSW 15 - 25 |
| Sunday Morning | S 10 - 20 |
| Sunday Afternoon | W 5 - 15 |
| Sunday Night | W 20 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Morning | SSW 15 - 25 |
| Saturday Afternoon | SW 10 - 20 |
| Saturday Night | WSW 0 - 10 |
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | N 5 - 15 |
| Sunday Night | W 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Morning | SSW 10 - 20 |
| Saturday Afternoon | S 5 - 15 |
| Saturday Night | S 0 - 10 |
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | N 5 - 15 |
| Sunday Night | WSW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Morning | SSW 15 - 25 |
| Saturday Afternoon | S 10 - 20 |
| Saturday Night | W 5 - 15 |
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | VAR 0 - 10 |
| Sunday Night | W 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Morning | SW 15 - 25 |
| Saturday Afternoon | SW 20 - 30 |
| Saturday Night | WSW 15 - 25 |
| Sunday Morning | S 10 - 20 |
| Sunday Afternoon | W 5 - 15 |
| Sunday Night | W 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Morning | SW 20 - 30 | SW 30 - 40 | SW 20 - 30 | --- - | SW 30 - 40 |
| Saturday Afternoon | WSW 15 - 25 | WSW 10 - 20 | WSW 45 - 65 | --- - | WSW 30 - 40 |
| Saturday Night | SW 15 - 25 | SW 20 - 30 | SW 25 - 35 | --- - | SW 30 - 40 |
| Sunday Morning | SE 10 - 20 | SE 10 - 20 | ESE 20 - 30 | --- - | SW 30 - 40 |
| Sunday Afternoon | ESE 15 - 25 | SE 15 - 25 | SSE 20 - 30 | --- - | SSW 20 - 30 |
| Sunday Night | W 10 - 20 | WNW 15 - 25 | W 20 - 30 | --- - | W 30 - 40 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Morning | SW 20 - 30 |
| Saturday Afternoon | WSW 15 - 25 |
| Saturday Night | SW 15 - 25 |
| Sunday Morning | SE 10 - 20 |
| Sunday Afternoon | ESE 15 - 25 |
| Sunday Night | W 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Morning | SW 30 - 40 |
| Saturday Afternoon | WSW 10 - 20 |
| Saturday Night | SW 20 - 30 |
| Sunday Morning | SE 10 - 20 |
| Sunday Afternoon | SE 15 - 25 |
| Sunday Night | WNW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Morning | SW 20 - 30 |
| Saturday Afternoon | WSW 45 - 65 |
| Saturday Night | SW 25 - 35 |
| Sunday Morning | ESE 20 - 30 |
| Sunday Afternoon | SSE 20 - 30 |
| Sunday Night | W 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Morning | SW 30 - 40 |
| Saturday Afternoon | WSW 30 - 40 |
| Saturday Night | SW 30 - 40 |
| Sunday Morning | SW 30 - 40 |
| Sunday Afternoon | SSW 20 - 30 |
| Sunday Night | W 30 - 40 |
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 Apr 13, 2018
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