Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Friday & Thursday
A flat upper level ridge over the eastern North Pacific is directing a very shallow trough inland across southern British Columbia on Friday with a cold front trailing into the northern portion of Washington state. The weak front should pass the Cascades during the late morning hours and is bringing light shower activity to the west slopes of the Cascades north of Snoqualmie Pass, but precipitation will shift southward during the morning hours, extending the possibility of precipitation from Mt. Rainier northward. Precipitation will decrease or end during the afternoon in most cases. The exception is a convergence band which will keep very light rain and snow in the forecast until the early morning areas and is most likely near the Snoqualmie Pass. Less moisture in the south is maintaining mild and mostly sunny conditions over the Mt Hood area. Some partial clearing is expected in the afternoon for the north Cascades and Olympics.
Temperatures will continue to be significantly warmer in the southern part of the forecast area. Mid-elevations on Mt. Hood may not see temperatures drop below freezing on Friday night.
On Saturday, weak ridging develops over southern British Columbia. Some lingering clouds in the morning will give way to mostly clear skies. Winds will be light.
Saturday night a trough moving south down the northern British Columbia coastline will bring increasing clouds ahead of it.
Weather Forecast
Olympics
| Friday | Very light showers in the morning, becoming partly cloudy in the afternoon. |
| Friday Night | Clearing skies. |
| Saturday | Mostly sunny. |
| Saturday Night | Increasing clouds after midnight. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Friday | Light rain or snow mostly north and central part, clouds will increase in the south and a rain or snow shower is still possible during the early afternoon hours. Light rain and snow showers will continue into the overnight hours in convergence near Snoqualmie Pass. |
| Friday Night | Mostly cloudy with a chance of light rain or snow in convergence, central part. Elsewhere mostly clear skies. |
| Saturday | Mostly sunny. |
| Saturday Night | Clear skies in the evening with increasing clouds after midnight. |
East Slopes of the Washington Cascades
| Friday | Cloudy with some very light rain or snow showers north and central parts in the morning. Decreasing clouds in the afternoon. |
| Friday Night | Partly cloudy central part. Elsewhere, mostly clear skies. |
| Saturday | Mostly sunny. |
| Saturday Night | Clear skies in the evening with increasing clouds after midnight. |
Mt. Hood
| Friday | A mix of sun and clouds. Warm. |
| Friday Night | A mix of sun and clouds. Mild. |
| Saturday | Mostly sunny. Warm. |
| Saturday Night | Increasing clouds by morning. |
Issued: 7:52 AM PDT Friday, March 30, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Friday Morning | Snow Level | 4000' | 3500' | 4000' | ' | ' | 4500' | ' | 5500' |
| Friday Afternoon | Snow Level | 5000' | 4000' | 5000' | ' | ' | 4000' | ' | 6500' |
| Friday Night | Snow Level | 4000' | 3500' | 3500' | ' | ' | 4000' | ' | 6000' |
| Saturday Morning | Snow Level | 4500' | 4500' | 4000' | ' | ' | 4500' | ' | 5000' |
| Saturday Afternoon | Snow Level | 5000' | 5500' | 6000' | ' | ' | 6000' | ' | 7000' |
| Saturday Night | Snow Level | 5500' | 4500' | 4500' | ' | ' | 4500' | ' | 6000' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Morning |
Snow Level 4000' |
| Friday Afternoon |
Snow Level 5000' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 4500' |
| Saturday Afternoon |
Snow Level 5000' |
| Saturday Night |
Snow Level 5500' |
| Mt. Baker | Elevation |
|---|---|
| Friday Morning |
Snow Level 3500' |
| Friday Afternoon |
Snow Level 4000' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Snow Level 4500' |
| Saturday Afternoon |
Snow Level 5500' |
| Saturday Night |
Snow Level 4500' |
| Washington Pass | Elevation |
|---|---|
| Friday Morning |
Snow Level 4000' |
| Friday Afternoon |
Snow Level 5000' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Snow Level 4000' |
| Saturday Afternoon |
Snow Level 6000' |
| Saturday Night |
Snow Level 4500' |
| Leavenworth | Elevation |
|---|---|
| Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night |
Snow Level ' |
| Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night |
Snow Level ' |
| Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Morning |
Snow Level 4500' |
| Friday Afternoon |
Snow Level 4000' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 4500' |
| Saturday Afternoon |
Snow Level 6000' |
| Saturday Night |
Snow Level 4500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night |
Snow Level ' |
| Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Friday Morning |
Snow Level 5500' |
| Friday Afternoon |
Snow Level 6500' |
| Friday Night |
Snow Level 6000' |
| Saturday Morning |
Snow Level 5000' |
| Saturday Afternoon |
Snow Level 7000' |
| Saturday Night |
Snow Level 6000' |
* 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 | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | LT 0.25 | LT 0.10 |
| Washington Pass | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.25 | LT 0.10 |
| Snoqualmie Pass | LT 0.25 | 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: 7:52 AM PDT Friday, March 30, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Morning | WSW 15 - 25 | WSW 15 - 25 | W 15 - 25 | --- - | WSW 20 - 30 |
| Friday Afternoon | WSW 10 - 20 | WSW 5 - 15 | W 15 - 25 | --- - | W 20 - 30 |
| Friday Night | W 0 - 10 | W 0 - 10 | W 0 - 10 | --- - | W 10 - 20 |
| Saturday Morning | S 0 - 10 | VAR 0 - 10 | VAR 0 - 10 | --- - | W 10 - 20 |
| Saturday Afternoon | WSW 5 - 15 | WSW 5 - 15 | W 5 - 15 | --- - | W 10 - 20 |
| Saturday Night | WSW 15 - 25 | WSW 15 - 25 | WSW 15 - 25 | --- - | WSW 20 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Morning | WSW 15 - 25 |
| Friday Afternoon | WSW 10 - 20 |
| Friday Night | W 0 - 10 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | WSW 5 - 15 |
| Saturday Night | WSW 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Friday Morning | WSW 15 - 25 |
| Friday Afternoon | WSW 5 - 15 |
| Friday Night | W 0 - 10 |
| Saturday Morning | VAR 0 - 10 |
| Saturday Afternoon | WSW 5 - 15 |
| Saturday Night | WSW 15 - 25 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Morning | W 15 - 25 |
| Friday Afternoon | W 15 - 25 |
| Friday Night | W 0 - 10 |
| Saturday Morning | VAR 0 - 10 |
| Saturday Afternoon | W 5 - 15 |
| Saturday Night | WSW 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night | --- - |
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Friday Morning | WSW 20 - 30 |
| Friday Afternoon | W 20 - 30 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | W 10 - 20 |
| Saturday Night | WSW 20 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Morning | WSW 15 - 25 |
| Friday Afternoon | WSW 10 - 20 |
| Friday Night | W 0 - 10 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | WSW 5 - 15 |
| Saturday Night | WSW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Morning | WSW 15 - 25 |
| Friday Afternoon | WSW 5 - 15 |
| Friday Night | W 0 - 10 |
| Saturday Morning | VAR 0 - 10 |
| Saturday Afternoon | WSW 5 - 15 |
| Saturday Night | WSW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Morning | W 15 - 25 |
| Friday Afternoon | W 15 - 25 |
| Friday Night | W 0 - 10 |
| Saturday Morning | VAR 0 - 10 |
| Saturday Afternoon | W 5 - 15 |
| Saturday Night | WSW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night | --- - |
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Morning | WSW 20 - 30 |
| Friday Afternoon | W 20 - 30 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | W 10 - 20 |
| Saturday Night | WSW 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 | |
|---|---|---|---|---|---|
| Friday Morning | WSW 30 - 40 | WSW 35 - 50 | W 45 - 65 | --- - | WSW 35 - 50 |
| Friday Afternoon | W 20 - 30 | W 25 - 35 | W 35 - 50 | --- - | W 30 - 40 |
| Friday Night | W 15 - 25 | W 10 - 20 | W 25 - 35 | --- - | W 15 - 25 |
| Saturday Morning | W 10 - 20 | W 10 - 20 | W 10 - 20 | --- - | W 20 - 30 |
| Saturday Afternoon | WSW 15 - 25 | WSW 15 - 25 | WSW 20 - 30 | --- - | WSW 20 - 30 |
| Saturday Night | WSW 25 - 35 | WSW 25 - 35 | WSW 30 - 40 | --- - | WSW 30 - 40 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Morning | WSW 30 - 40 |
| Friday Afternoon | W 20 - 30 |
| Friday Night | W 15 - 25 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | WSW 15 - 25 |
| Saturday Night | WSW 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Morning | WSW 35 - 50 |
| Friday Afternoon | W 25 - 35 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | WSW 15 - 25 |
| Saturday Night | WSW 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Morning | W 45 - 65 |
| Friday Afternoon | W 35 - 50 |
| Friday Night | W 25 - 35 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | WSW 20 - 30 |
| Saturday Night | WSW 30 - 40 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night | --- - |
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Morning | WSW 35 - 50 |
| Friday Afternoon | W 30 - 40 |
| Friday Night | W 15 - 25 |
| Saturday Morning | W 20 - 30 |
| Saturday Afternoon | WSW 20 - 30 |
| Saturday Night | WSW 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 Mar 28, 2018
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