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Mountain Weather Forecast

Issued: 3:21 PM PST Saturday, April 22, 2017
by Kenny Kramer

Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather

Weather Synopsis for Saturday & Sunday

Well, one day of nice spring weather per week is better than none. That would have been yesterday, in case you missed it. That weather is now in the distant rear view mirror, as the upper ridge responsible has exited stage east by Saturday afternoon.

A return to an active weather pattern in the PNW for this coming week is well underway. 

An upper trough is now in place well offshore with an east to west oriented trough extending across Washington. An associated band of precipitation is rotating northward and has mostly passed the forecast area Saturday afternoon. Additional shower bands have activated across the central WA Cascades Saturday afternoon. Somewhat unstable air will maintain periods of generally light showers Saturday afternoon and evening, before tapering or ending overnight.

A brief break in precipitation is expected later Saturday night through early Sunday before the next wave arrives midday and through Sunday afternoon. The weak upper flow will turn more onshore Sunday to maintain the greatest precipitation over the west slope areas and volcanoes through Sunday evening. The upper level trough will remain offshore, maintaining unsettled and cooler conditions with periods of showers or steady precipitation at times heading into next week.

Weather forecast

Olympics
Saturday Afternoon - Sunday Morning

Mostly cloudy with light rain and snow showers tapering or ending overnight through early Sunday. 

Renewed light to occasionally moderate rain and snow showers. Showers diminishing overnight.

Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
Saturday Afternoon - Sunday Morning

Mostly cloudy with light rain and snow showers tapering or ending overnight through early Sunday, except occasionally light to moderate showers persisting in the Mt. Baker area. 

Renewed light to occasionally moderate rain and snow showers. Showers diminishing overnight.

East slopes of the Washington Cascades
Saturday Afternoon - Sunday Morning

Partly to mostly cloudy with isolated light rain and snow showers ending in the evening through early Sunday.  

Renewed light rain and snow showers. Showers diminishing overnight.

Mt. Hood Area
Saturday Afternoon - Saturday Night

Mostly cloudy with isolated light rain and snow showers in the afternoon, ending overnight and becoming partly cloudy. 

Renewed light to moderate rain and snow showers Sunday morning through Sunday afternoon. Showers diminishing overnight.

Snow/Freezing Level (ft)

Hurricane Ridge Mt. Baker Washington Pass Leavenworth Stevens Pass Snoqualmie Pass Mt. Rainier, Crystal & White Pass Mt. Hood
Saturday Afternoon Snow Level* 5500' 5500' 5500' None' None' 5500' None' 6000'
Saturday Night Snow Level 4000' 4000' 4000' None' None' 4000' None' 4500'
Sunday Snow Level 4000' 4500' 4500' None' None' 4500' None' 5000'
Hurricane Ridge Elevation
Saturday Afternoon Snow Level
5500'
(Easterly Flow *)
Saturday Night Snow Level
4000'
Sunday Snow Level
4000'
Sunday Night Snow Level
3500'
Mt. Baker Elevation
Saturday Afternoon Snow Level
5500'
(Easterly Flow *)
Saturday Night Snow Level
4000'
Sunday Snow Level
4500'
Sunday Night Snow Level
3500'
Washington Pass Elevation
Saturday Afternoon Snow Level
5500'
(Easterly Flow *)
Saturday Night Snow Level
4000'
Sunday Snow Level
4500'
Sunday Night Snow Level
3500'
Leavenworth Elevation
Saturday Afternoon Snow Level
None'
(Easterly Flow *)
Saturday Night Snow Level
None'
Sunday Snow Level
None'
Sunday Night Snow Level
None'
Stevens Pass Elevation
Saturday Afternoon Snow Level
None'
(Easterly Flow *)
Saturday Night Snow Level
None'
Sunday Snow Level
None'
Sunday Night Snow Level
None'
Snoqualmie Pass Elevation
Saturday Afternoon Snow Level
5500'
(Easterly Flow *)
Saturday Night Snow Level
4000'
Sunday Snow Level
4500'
Sunday Night Snow Level
3500'
Mt. Rainier & Crystal Elevation
Saturday Afternoon Snow Level
None'
(Easterly Flow *)
Saturday Night Snow Level
None'
Sunday Snow Level
None'
Sunday Night Snow Level
None'
Mt. Hood Elevation
Saturday Afternoon Snow Level
6000'
(Easterly Flow *)
Saturday Night Snow Level
4500'
Sunday Snow Level
5000'
Sunday Night Snow Level
4000'

* 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

Sunday Monday
Hurricane Ridge 0.25 0.25
Mt Baker Ski Area 0.50 0.50
Washington Pass LT 0.25 LT 0.25
Stevens Pass 0.25 0.25 - 0.50
Snoqualmie Pass 0.25 0.25 - 0.50
Mission Ridge LT 0.10 LT 0.25
Crystal Mt 0.25 0.25 - 0.50
Paradise 0.25 0.75
White Pass LT 0.25 0.25 - 0.50
Mt Hood Meadows LT 0.25 0.75
LT 0.25 0.75 - 1.00
Hurricane Ridge Precipitation Forecast
Sunday 0.25
Monday 0.25
Mt Baker Ski Area Precipitation Forecast
Sunday 0.50
Monday 0.50
Washington Pass Precipitation Forecast
Sunday LT 0.25
Monday LT 0.25
Stevens Pass Precipitation Forecast
Sunday 0.25
Monday 0.25 - 0.50
Snoqualmie Pass Precipitation Forecast
Sunday 0.25
Monday 0.25 - 0.50
Mission Ridge Precipitation Forecast
Sunday LT 0.10
Monday LT 0.25
Crystal Mt Precipitation Forecast
Sunday 0.25
Monday 0.25 - 0.50
Paradise Precipitation Forecast
Sunday 0.25
Monday 0.75
White Pass Precipitation Forecast
Sunday LT 0.25
Monday 0.25 - 0.50
Mt Hood Meadows Precipitation Forecast
Sunday LT 0.25
Monday 0.75
Timberline Precipitation Forecast
Sunday LT 0.25
Monday 0.75 - 1.00

Free Winds at 5000' (mph)

Hurricane Ridge Mt. Baker Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Saturday Afternoon SSW 15 - 25 S 15 - 25 SW 15 - 25 --- None - None SW 15 - 25
Saturday Night - Sunday Morning SW 0 - 10 S 5 - 15 SW 0 - 10 --- None - None WSW 5 - 15
Hurricane Ridge Elevation
Saturday Afternoon SSW 15 - 25
Saturday Night - Sunday Morning SW 0 - 10
Sunday Afternoon - Sunday Night SW 5 - 15
Mt. Baker Elevation
Saturday Afternoon S 15 - 25
Saturday Night - Sunday Morning S 5 - 15
Sunday Afternoon - Sunday Night SW 5 - 15
Stevens and Snoqualmie Pass Elevation
Saturday Afternoon SW 15 - 25
Saturday Night - Sunday Morning SW 0 - 10
Sunday Afternoon - Sunday Night SW 10 - 20
Mt. Rainier Elevation
Saturday Afternoon --- None - None
Saturday Night - Sunday Morning --- None - None
Sunday Afternoon - Sunday Night --- None - None
Mt. Hood Elevation
Saturday Afternoon SW 15 - 25
Saturday Night - Sunday Morning WSW 5 - 15
Sunday Afternoon - Sunday Night SW 10 - 20
Hurricane Ridge Direction - Speed
Saturday Afternoon SSW 15 - 25
Saturday Night - Sunday Morning SW 0 - 10
Sunday Afternoon - Sunday Night SW 5 - 15
Mt. Baker Direction - Speed
Saturday Afternoon S 15 - 25
Saturday Night - Sunday Morning S 5 - 15
Sunday Afternoon - Sunday Night SW 5 - 15
Stevens and Snoqualmie Pass Direction - Speed
Saturday Afternoon SW 15 - 25
Saturday Night - Sunday Morning SW 0 - 10
Sunday Afternoon - Sunday Night SW 10 - 20
Mt. Rainier Direction - Speed
Saturday Afternoon --- None - None
Saturday Night - Sunday Morning --- None - None
Sunday Afternoon - Sunday Night --- None - None
Mt. Hood Direction - Speed
Saturday Afternoon SW 15 - 25
Saturday Night - Sunday Morning WSW 5 - 15
Sunday Afternoon - Sunday Night SW 10 - 20

Directions above indicate the direction the wind blows from on the 16-point cardinal scale. These winds and the 9000 ft winds below also 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 Afternoon SW 25 - 35 SW 15 - 25 SW 20 - 30 --- None - None SW 25 - 35
Saturday Night - Sunday Morning SW 5 - 15 WSW 5 - 15 WSW 10 - 20 --- None - None SW 20 - 30
Mt. Baker Direction - Speed
Saturday Afternoon SW 25 - 35
Saturday Night - Sunday Morning SW 5 - 15
Sunday Afternoon - Sunday Night SW 10 - 20
Washington Pass Direction - Speed
Saturday Afternoon SW 15 - 25
Saturday Night - Sunday Morning WSW 5 - 15
Sunday Afternoon - Sunday Night SW 10 - 20
Stevens and Snoqualmie Pass Direction - Speed
Saturday Afternoon SW 20 - 30
Saturday Night - Sunday Morning WSW 10 - 20
Sunday Afternoon - Sunday Night SW 20 - 30
Mt. Rainier Direction - Speed
Saturday Afternoon --- None - None
Saturday Night - Sunday Morning --- None - None
Sunday Afternoon - Sunday Night --- None - None
Mt. Hood Direction - Speed
Saturday Afternoon SW 25 - 35
Saturday Night - Sunday Morning SW 20 - 30
Sunday Afternoon - Sunday Night SW 25 - 35

Extended Weather Synopsis for Monday night through Wednesday

An upper and surface low pressure system is expected to develop offshore of southern Oregon Sunday night and early Monday with a strong jet directed towards northern California. The heaviest precipitation looks to be centered on the southern Washington Cascades and Mt. Hood Monday through Tuesday, with even greater energy directed across Oregon and northern California to the south of the forecast area. However, there will be periods of moderate precipitation over all areas as the quasi-stationary upper low off of Vancouver Island ejects inland.

The upper low offshore should eject slowly across the region Wednesday.

This pattern will maintain relatively low snow levels with periods of moderate precipitation during individual disturbance passages, with brief breaks at time. Timing of the impulses in the extended forecast is difficult to pinpoint, but suffice it to say, it will be an overall active pattern this coming week. 

Extended Weather

Olympics, Washington Cascades and Mt. Hood
Monday

Light to moderate rain and snow over the Olympics spreading inland to Mt. Hood, and the south and central Washington Cascades. Light rain and snow north Cascades. 

Extended Snow/Freezing Levels

Mt. Baker Snoqualmie Pass Mt. Hood Easterly Flow *
Monday Snow Level 3500' - 4500' 3500' - 4500' 3500' - 4500'
Monday Afternoon Snow Level 4500' - 5500' 4500' - 5500' 4500' - 5500'
Monday Night - Tuesday Morning Snow Level 3500' - 4500' 3500' - 4500' 3500' - 4500'
Tuesday Afternoon Snow Level 4000' - 5000' 4000' - 5000' 4500' - 5500'
Mt. Baker Elevation
Monday Snow Level
3500' - 4500'
Monday Afternoon Snow Level
4500' - 5500'
Monday Night - Tuesday Morning Snow Level
3500' - 4500'
Tuesday Afternoon Snow Level
4000' - 5000'
Tuesday Night - Wednesday Snow Level
3500' - 4500'
Snoqualmie Pass Elevation
Monday Snow Level
3500' - 4500'
Monday Afternoon Snow Level
4500' - 5500'
Monday Night - Tuesday Morning Snow Level
3500' - 4500'
Tuesday Afternoon Snow Level
4000' - 5000'
Tuesday Night - Wednesday Snow Level
3500' - 4500'
Mt. Hood Elevation
Monday Snow Level
3500' - 4500'
Monday Afternoon Snow Level
4500' - 5500'
Monday Night - Tuesday Morning Snow Level
3500' - 4500'
Tuesday Afternoon Snow Level
4500' - 5500'
Tuesday Night - Wednesday Snow Level
3500' - 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.

Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather

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