Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Friday & Saturday
It's a cool morning across the PNW with about 2-4 inches of new snow above 4000 feet in Cascades over the last 24 hours. A nearly stationary low pressure system located well of Vancouver Island will continue to plague the PNW with cool and showery weather today. Snow levels will be seasonally cool for mid-April. Convective showers streaming inland from the low pressure system offshore will mainly affect the Olympics this morning and mostly peter out over the Cascades. Daytime heating and an unstable air mass will induce increased shower activity this afternoon. A thunderstorm seems unlikely but showers may contain graupel due to the instability and low snow levels. A Puget Sound Convergence zone is still slotted to form sometime this afternoon through evening and hang up over the Glacier Peak/Mountain Loop Highway region. Locally higher precipitation amounts from the convergence zone may also affect the Stevens Pass area as well.
Showers should diminish overnight with the loss of daytime heating. On Saturday, clouds along with light showers should be most abundant for the north Cascades and the Olympics. Increased sunbreaks should be seen over the central and south Washington Cascades and even more so for the Mt. Hood area. Weak onshore flow along with upper level ridging makes the prospects of a full afternoon breakout more uncertain in the central-west and southwest Cascades. A clearing and drying trend should take place Saturday night.
Weather Forecast
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Friday Morning - Friday Mid-day |
Mostly cloudy with scattered light rain and snow showers. Sunbreaks possible. |
| Friday Afternoon - Friday Evening |
Cloudy with light to occasionally moderate rain and snow showers. Slight chance of a thunderstorm. Locally higher snow accumulations Glacier Peak/Mountain Loop Highway near a convergence zone. |
| Friday Night - Saturday Morning |
Mostly cloudy with isolated light rain and snow showers. |
| Saturday Afternoon |
Mostly cloudy northwest Cascades with scattered light rain and snow showers. A mix of sun and clouds central-west and southwest Cascades with isolated light rain and snow showers. |
| Saturday Night |
Becoming partly cloudy overnight. |
Olympics
| Friday Morning - Friday Mid-day |
Mostly cloudy with scattered light to occasionally moderate rain and snow showers. Sunbreaks possible. |
| Friday Afternoon - Friday Evening |
Cloudy with light to occasionally moderate rain and snow showers. Slight chance of a thunderstorm. |
| Friday Night - Saturday Morning |
Mostly cloudy with isolated light rain and snow showers. |
| Saturday Afternoon |
Mostly cloudy with scattered light rain and snow showers. |
| Saturday Night |
Becoming partly cloudy overnight. |
Mt. Hood Area
| Friday Morning - Friday Mid-day |
Mostly cloudy with scattered light rain and snow showers. Sunbreaks possible. |
| Friday Afternoon - Friday Evening |
Cloudy with light to occasionally moderate rain and snow showers. Slight chance of a thunderstorm. |
| Friday Night - Saturday Morning |
Mostly cloudy with isolated light rain and snow showers. |
| Saturday Afternoon |
Partly to mostly sunny. |
| Saturday Night |
Partly cloudy. |
East slopes of the Washington Cascades
| Friday Morning - Friday Mid-day |
Partly to mostly clear. |
| Friday Afternoon - Friday Evening |
Mostly cloudy with light to occasionally moderate rain and snow showers. Slight chance of a thunderstorm. |
| Friday Night - Saturday Morning |
Partly to mostly cloudy with isolated light rain and snow showers tapering off overnight. |
| Saturday Afternoon |
Mostly cloudy northeast Cascades with scattered light rain and snow showers. Partly to mostly sunny central-east and southeast Cascades with isolated light rain and snow showers mainly near the Cascade crest. |
| Saturday Night |
Becoming mostly clear overnight. |
Issued: 7:54 AM PDT Friday, April 14, 2017
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 | 2500' | 2500' | 2000' | ' | ' | 2500' | ' | 2500' |
| Friday Afternoon | Snow Level | 4000' | 4000' | 4500' | ' | ' | 4000' | ' | 4000' |
| Friday Night - Saturday Morning | Snow Level | 2000' | 2000' | 1500' | ' | ' | 2000' | ' | 2000' |
| Saturday Afternoon - Saturday Night | Snow Level | 4500' | 4500' | 4500' | ' | ' | 4500' | ' | 5500' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Morning |
Snow Level 2500' |
| Friday Afternoon |
Snow Level 4000' |
| Friday Night - Saturday Morning |
Snow Level 2000' |
| Saturday Afternoon - Saturday Night |
Snow Level 4500' |
| Mt. Baker | Elevation |
|---|---|
| Friday Morning |
Snow Level 2500' |
| Friday Afternoon |
Snow Level 4000' |
| Friday Night - Saturday Morning |
Snow Level 2000' |
| Saturday Afternoon - Saturday Night |
Snow Level 4500' |
| Washington Pass | Elevation |
|---|---|
| Friday Morning |
Snow Level 2000' |
| Friday Afternoon |
Snow Level 4500' |
| Friday Night - Saturday Morning |
Snow Level 1500' |
| Saturday Afternoon - Saturday Night |
Snow Level 4500' |
| Leavenworth | Elevation |
|---|---|
| Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night - Saturday Morning |
Snow Level ' |
| Saturday Afternoon - Saturday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night - Saturday Morning |
Snow Level ' |
| Saturday Afternoon - Saturday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Morning |
Snow Level 2500' |
| Friday Afternoon |
Snow Level 4000' |
| Friday Night - Saturday Morning |
Snow Level 2000' |
| Saturday Afternoon - Saturday Night |
Snow Level 4500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night - Saturday Morning |
Snow Level ' |
| Saturday Afternoon - Saturday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Friday Morning |
Snow Level 2500' |
| Friday Afternoon |
Snow Level 4000' |
| Friday Night - Saturday Morning |
Snow Level 2000' |
| Saturday Afternoon - Saturday Night |
Snow Level 5500' |
* 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
| Saturday | Saturday | |
|---|---|---|
| Hurricane Ridge | LT 0.25 | LT 0.25 |
| Mt Baker Ski Area | 0.25 - 0.50 | LT 0.25 |
| Washington Pass | LT 0.25 | LT 0.10 |
| Stevens Pass | 0.50 - 0.75 | LT 0.10 |
| Snoqualmie Pass | 0 - 0.50 | LT 0.10 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.25 | LT 0.10 |
| Paradise | 0.50 - 0.75 | LT 0.10 |
| White Pass | 0.25 - 0.50 | LT 0.10 |
| Mt Hood Meadows | 0 - 0.50 | LT 0.10 |
| Timberline | 0.50 - 0.75 | 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: 7:54 AM PDT Friday, April 14, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Morning | SW 0 - 10 | SSW 10 - 20 | W 5 - 15 | --- - | WSW 15 - 25 |
| Friday Afternoon | SW 5 - 15 | SW 5 - 15 | WSW 10 - 20 | --- - | W 10 - 20 |
| Friday Night - Saturday Morning | SW 0 - 10 | SW 0 - 10 | WSW 5 - 15 | --- - | W 5 - 15 |
| Saturday Afternoon | SW 0 - 10 | W 0 - 10 | W 0 - 10 | --- - | E 0 - 10 |
| Saturday Night | E 5 - 15 | E 0 - 10 | E 5 - 15 | --- - | E 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Morning | SW 0 - 10 |
| Friday Afternoon | SW 5 - 15 |
| Friday Night - Saturday Morning | SW 0 - 10 |
| Saturday Afternoon | SW 0 - 10 |
| Saturday Night | E 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Friday Morning | SSW 10 - 20 |
| Friday Afternoon | SW 5 - 15 |
| Friday Night - Saturday Morning | SW 0 - 10 |
| Saturday Afternoon | W 0 - 10 |
| Saturday Night | E 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Morning | W 5 - 15 |
| Friday Afternoon | WSW 10 - 20 |
| Friday Night - Saturday Morning | WSW 5 - 15 |
| Saturday Afternoon | W 0 - 10 |
| Saturday Night | E 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night - Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Friday Morning | WSW 15 - 25 |
| Friday Afternoon | W 10 - 20 |
| Friday Night - Saturday Morning | W 5 - 15 |
| Saturday Afternoon | E 0 - 10 |
| Saturday Night | E 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Morning | SW 0 - 10 |
| Friday Afternoon | SW 5 - 15 |
| Friday Night - Saturday Morning | SW 0 - 10 |
| Saturday Afternoon | SW 0 - 10 |
| Saturday Night | E 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Morning | SSW 10 - 20 |
| Friday Afternoon | SW 5 - 15 |
| Friday Night - Saturday Morning | SW 0 - 10 |
| Saturday Afternoon | W 0 - 10 |
| Saturday Night | E 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Morning | W 5 - 15 |
| Friday Afternoon | WSW 10 - 20 |
| Friday Night - Saturday Morning | WSW 5 - 15 |
| Saturday Afternoon | W 0 - 10 |
| Saturday Night | E 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night - Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Morning | WSW 15 - 25 |
| Friday Afternoon | W 10 - 20 |
| Friday Night - Saturday Morning | W 5 - 15 |
| Saturday Afternoon | E 0 - 10 |
| Saturday Night | E 5 - 15 |
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 | SW 10 - 20 | W 5 - 15 | SW 15 - 25 | --- - | W 20 - 30 |
| Friday Afternoon | W 10 - 20 | W 10 - 20 | WSW 20 - 30 | --- - | W 20 - 30 |
| Friday Night - Saturday Morning | W 10 - 20 | W 20 - 30 | WNW 15 - 25 | --- - | W 5 - 15 |
| Saturday Afternoon - Saturday Night | W 0 - 10 | W 0 - 10 | SW 0 - 10 | --- - | SW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Morning | SW 10 - 20 |
| Friday Afternoon | W 10 - 20 |
| Friday Night - Saturday Morning | W 10 - 20 |
| Saturday Afternoon - Saturday Night | W 0 - 10 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Morning | W 5 - 15 |
| Friday Afternoon | W 10 - 20 |
| Friday Night - Saturday Morning | W 20 - 30 |
| Saturday Afternoon - Saturday Night | W 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Morning | SW 15 - 25 |
| Friday Afternoon | WSW 20 - 30 |
| Friday Night - Saturday Morning | WNW 15 - 25 |
| Saturday Afternoon - Saturday Night | SW 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night - Saturday Morning | --- - |
| Saturday Afternoon - Saturday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Morning | W 20 - 30 |
| Friday Afternoon | W 20 - 30 |
| Friday Night - Saturday Morning | W 5 - 15 |
| Saturday Afternoon - Saturday Night | SW 5 - 15 |
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.
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Previous forecast from Apr 13, 2017
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