Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Friday & Friday
An upper level ridge will flop over the Pacific Northwest today. A weak frontal system currently over Vancouver Island this afternoon has spread increasing high clouds over the Olympics and north Cascades with periods of filtered sunshine for areas further south. Clouds and moisture will increase overnight with the front quickly moving through the area Saturday morning. Post-frontal shower activity should be fairly light, heaviest along the west slopes of the Washington Cascades, with sunbreaks likely in the afternoon. The northwest Cascades may be locally cloudier while increased amounts of sunshine are likely along the east slopes of the Washington Cascades and further south at Mt. Hood. A 100 kt jet will have sunk over the area on Saturday, and alpine winds are expected to be moderate out of the W-NW Saturday and Saturday night.
An approaching upper level trough will move overhead late Saturday night, dropping snow levels and increasing cloud cover over the area. A Puget Sound Convergence zone may form Saturday night as moist onshore westerly flow increases with localized snow showers focusing into the central-west Cascades.
Weather Forecast
Olympics
| Friday |
Partly to mostly cloudy with filtered sunshine through high clouds. |
| Friday Night |
Increasing clouds overnight and light rain and snow developing. |
| Saturday Morning |
Cloudy with light rain and snow turning to light scattered showers. |
| Saturday Afternoon |
Mostly cloudy with afternoon sunbreaks. Isolated light rain and snow showers. |
| Saturday Night |
Increasing clouds overnight. Scattered light rain and snow showers increasing overnight. Cooler. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Friday |
Partly to mostly cloudy with filtered sunshine through high clouds northwest Cascades. Mostly sunny central and south Washington Cascades in the morning with periods of filtered sunshine beginning late morning. Milder. |
| Friday Night |
Increasing clouds overnight and light rain and snow developing northwest Cascades. |
| Saturday Morning - Saturday Mid-day |
Cloudy with light rain and snow turning to light showers mid-day. |
| Saturday Afternoon |
Mostly cloudy with afternoon sunbreaks. Isolated light rain and snow showers. |
| Saturday Night |
Increasing clouds and scattered light rain and snow showers increasing overnight, locally light to moderate in a Puget Sound convergence zone. Cooler. |
East slopes of the Washington Cascades
| Friday |
Partly cloudy with filtered sunshine through high clouds northeast Cascades. Mostly sunny central-east and southeast Washington Cascades in the morning with Periods of filtered sunshine beginning mid-day. Milder. |
| Friday Night |
Increasing clouds overnight. |
| Saturday Morning - Saturday Mid-day |
Cloudy with light rain and snow turning to scattered light showers mid-day. |
| Saturday Afternoon |
Partly to mostly cloudy with afternoon sunbreaks. Isolated light rain and snow showers near the Cascade crest. |
| Saturday Night |
Increasing clouds late overnight. Cooler. |
Mt. Hood Area
| Friday |
Mostly sunny. Milder. |
| Friday Night |
Increasing clouds overnight. |
| Saturday Morning - Saturday Mid-day |
Cloudy with very light rain and snow turning to light isolated showers mid-day. |
| Saturday Afternoon |
Partly to mostly cloudy. Isolated light rain and snow showers. |
| Saturday Night |
Increasing clouds overnight. Cooler. |
Issued: 2:48 PM PDT Friday, March 31, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Friday Afternoon - Friday Evening | Freezing Level | 7500' | 6500' | 6500' | ' | ' | 6500' | ' | 8000' |
| Friday Night - Saturday Morning | Snow Level | 7000' | 5000' | 4500' | ' | ' | 6000' | ' | 8000' |
| Saturday Afternoon | Snow Level | 5000' | 5000' | 5000' | ' | ' | 5500' | ' | 7000' |
| Saturday Night | Snow Level | 3000' | 3000' | 3000' | ' | ' | 3000' | ' | 4500' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Afternoon - Friday Evening |
Freezing Level 7500' |
| Friday Night - Saturday Morning |
Snow Level 7000' |
| Saturday Afternoon |
Snow Level 5000' |
| Saturday Night |
Snow Level 3000' |
| Mt. Baker | Elevation |
|---|---|
| Friday Afternoon - Friday Evening |
Freezing Level 6500' |
| Friday Night - Saturday Morning |
Snow Level 5000' |
| Saturday Afternoon |
Snow Level 5000' |
| Saturday Night |
Snow Level 3000' |
| Washington Pass | Elevation |
|---|---|
| Friday Afternoon - Friday Evening |
Freezing Level 6500' |
| Friday Night - Saturday Morning |
Snow Level 4500' |
| Saturday Afternoon |
Snow Level 5000' |
| Saturday Night |
Snow Level 3000' |
| Leavenworth | Elevation |
|---|---|
| Friday Afternoon - Friday Evening |
Freezing Level ' |
| Friday Night - Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Friday Afternoon - Friday Evening |
Freezing Level ' |
| Friday Night - Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Afternoon - Friday Evening |
Freezing Level 6500' |
| Friday Night - Saturday Morning |
Snow Level 6000' |
| Saturday Afternoon |
Snow Level 5500' |
| Saturday Night |
Snow Level 3000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Afternoon - Friday Evening |
Freezing Level ' |
| Friday Night - Saturday Morning |
Snow Level ' |
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Friday Afternoon - Friday Evening |
Freezing Level 8000' |
| Friday Night - Saturday Morning |
Snow Level 8000' |
| Saturday Afternoon |
Snow Level 7000' |
| Saturday Night |
Snow Level 4500' |
* 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 0.25 |
| Mt Baker Ski Area | LT 0.10 | 0.25 - 0.50 |
| Washington Pass | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.10 | 0.25 - 0.50 |
| Snoqualmie Pass | LT 0.10 | 0 - 0.50 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | 0.25 - 0.50 |
| Paradise | LT 0.10 | LT 0.25 |
| White Pass | LT 0.10 | LT 0.25 |
| Mt Hood Meadows | LT 0.10 | LT 0.25 |
| Timberline | LT 0.10 | LT 0.25 |
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: 2:48 PM PDT Friday, March 31, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday | VAR 0 - 10 | VAR 0 - 10 | W 0 - 10 | --- - | VAR 0 - 10 |
| Friday Night | SW 0 - 10 | SW 0 - 10 | WSW 0 - 10 | --- - | W 0 - 10 |
| Saturday Morning | SW 10 - 20 | SSW 10 - 20 | SW 5 - 15 | --- - | W 10 - 20 |
| Saturday Afternoon | WSW 10 - 20 | SW 10 - 20 | WSW 5 - 15 | --- - | W 10 - 20 |
| Saturday Night | W 15 - 25 | SW 15 - 25 | WSW 10 - 20 | --- - | W 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday | VAR 0 - 10 |
| Friday Night | SW 0 - 10 |
| Saturday Morning | SW 10 - 20 |
| Saturday Afternoon | WSW 10 - 20 |
| Saturday Night | W 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Friday | VAR 0 - 10 |
| Friday Night | SW 0 - 10 |
| Saturday Morning | SSW 10 - 20 |
| Saturday Afternoon | SW 10 - 20 |
| Saturday Night | SW 15 - 25 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday | W 0 - 10 |
| Friday Night | WSW 0 - 10 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | WSW 5 - 15 |
| Saturday Night | WSW 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Friday | --- - |
| Friday Night | --- - |
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Friday | VAR 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | W 10 - 20 |
| Saturday Night | W 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday | VAR 0 - 10 |
| Friday Night | SW 0 - 10 |
| Saturday Morning | SW 10 - 20 |
| Saturday Afternoon | WSW 10 - 20 |
| Saturday Night | W 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday | VAR 0 - 10 |
| Friday Night | SW 0 - 10 |
| Saturday Morning | SSW 10 - 20 |
| Saturday Afternoon | SW 10 - 20 |
| Saturday Night | SW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday | W 0 - 10 |
| Friday Night | WSW 0 - 10 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | WSW 5 - 15 |
| Saturday Night | WSW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday | --- - |
| Friday Night | --- - |
| Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday | VAR 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | W 10 - 20 |
| Saturday Night | W 15 - 25 |
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 Afternoon | W 10 - 20 | W 0 - 10 | NW 10 - 20 | --- - | N 5 - 15 |
| Friday Night | SW 15 - 25 | WSW 10 - 20 | W 15 - 25 | --- - | NW 10 - 20 |
| Saturday - Saturday Night | WSW 20 - 35 | W 30 - 45 | W 30 - 45 | --- - | WNW 20 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Afternoon | W 10 - 20 |
| Friday Night | SW 15 - 25 |
| Saturday - Saturday Night | WSW 20 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Afternoon | W 0 - 10 |
| Friday Night | WSW 10 - 20 |
| Saturday - Saturday Night | W 30 - 45 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Afternoon | NW 10 - 20 |
| Friday Night | W 15 - 25 |
| Saturday - Saturday Night | W 30 - 45 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Afternoon | --- - |
| Friday Night | --- - |
| Saturday - Saturday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Afternoon | N 5 - 15 |
| Friday Night | NW 10 - 20 |
| Saturday - Saturday Night | WNW 20 - 35 |
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.
Issued: 2:48 PM PDT Friday, March 31, 2017
Extended Weather Synopsis for Friday night through Friday
The convergence zone should linger into Sunday morning along with scattered snow showers across the west slopes of the Cascades, Olympics and Mt. Hood. Strong onshore flow should keep more clouds in the forecast along with cooler temperatures throughout the day on Sunday. Shower activity will taper off Sunday night as an upper level ridge builds offshore.
The upper level ridge will pass over the area on Monday and should provide a fair day with slightly warmer freezing levels. A warm front from an approaching frontal system should begin to spread light rain and snow over the Olympics on Tuesday, with increasing clouds and rising snow levels over the Cascades.
Extended Weather
Olympics, Washington Cascades and Mt. Hood
Cloudy Olympics, west slopes of the Washington Cascades and Mt. Hood with scattered rain and snow showers. Mostly cloudy east slopes of the Cascades with isolated showers near the Cascade crest. Cooler.
Partial clearing with showers tapering off overnight.
Partly to mostly sunny.
Partly to mostly clear.
Increasing clouds with light rain and snow developing over the Olympics.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Sunday - Sunday Night | Snow Level | 2500' - 3500' | 2500' - 3500' | 3000' - 4000' | |
| Monday - Monday Night | Freezing Level | 3500' - 4500' | 4000' - 5000' | 5000' - 6000' | |
| Tuesday | Snow Level | 5500' - 6500' | 5500' - 6500' | 6500' - 7500' |
| Mt. Baker | Elevation |
|---|---|
| Sunday - Sunday Night |
Snow Level 2500' - 3500' |
| Monday - Monday Night |
Freezing Level 3500' - 4500' |
| Tuesday |
Snow Level 5500' - 6500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday - Sunday Night |
Snow Level 2500' - 3500' |
| Monday - Monday Night |
Freezing Level 4000' - 5000' |
| Tuesday |
Snow Level 5500' - 6500' |
| Mt. Hood | Elevation |
|---|---|
| Sunday - Sunday Night |
Snow Level 3000' - 4000' |
| Monday - Monday Night |
Freezing Level 5000' - 6000' |
| Tuesday |
Snow Level 6500' - 7500' |
* 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Previous forecast from Mar 31, 2017
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