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Mountain Weather Forecast

Issued: 4:03 PM PST Saturday, April 28, 2018
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

The Pacific Northwest is under the influence of a large upper level low pressure system centered over SW Washington Saturday afternoon. This is producing cool and showery weather across the forecast region. The remnants of an organized band of showers is maintaining steady precipitation over the Olympics Saturday afternoon with most other areas across the Cascades receiving periodic showers.

The upper low will continue to weaken and drift slowly eastwards overnight and Sunday. The cool upper low system will combine with low level moisture from onshore flow to maintain the showery pattern through Sunday. Due to the showery nature of the precipitation it will be difficult to forecast accurately where the greatest precipitation will fall, however in general the overall amounts should not be significant. 

 

 

Weather Forecast

Olympics
Saturday Afternoon Cloudy with diminishing light rain and snow showers.
Saturday Night Cloudy with light rain and snow showers.
Sunday Mostly cloudy with rain and snow showers.
Mostly cloudy with rain and snow showers.
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
Saturday Afternoon Mostly cloudy with widespread rain and snow showers.
Saturday Night Cloudy with light rain and snow showers.
Sunday Mostly cloudy with rain and snow showers.
Mostly cloudy with rain and snow showers.
East Slopes of the Washington Cascades
Saturday Afternoon Mostly cloudy with rain and snow showers.
Saturday Night Mostly cloudy with scattered rain and snow showers.
Sunday Mostly cloudy with scattered rain and snow showers.
Mostly cloudy with scattered rain and snow showers.
Mt. Hood
Saturday Afternoon Mostly cloudy with rain and snow showers.
Saturday Night Mostly cloudy with rain and snow showers.
Sunday Mostly cloudy with rain and snow showers.
Mostly cloudy with rain and snow showers.

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 5000' 5000' 5500' None' None' 5000' None' 5500'
Saturday Night Snow Level 4500' 4500' 4500' None' None' 4500' None' 5000'
Sunday Snow Level 5000' 5000' 5500' None' None' 5000' None' 5000'
Hurricane Ridge Elevation
Saturday Afternoon Snow Level
5000'
Saturday Night Snow Level
4500'
Sunday Snow Level
5000'
Sunday Night Snow Level
4500'
Mt. Baker Elevation
Saturday Afternoon Snow Level
5000'
Saturday Night Snow Level
4500'
Sunday Snow Level
5000'
Sunday Night Snow Level
4500'
Washington Pass Elevation
Saturday Afternoon Snow Level
5500'
Saturday Night Snow Level
4500'
Sunday Snow Level
5500'
Sunday Night Snow Level
4500'
Leavenworth Elevation
Saturday Afternoon Snow Level
None'
Saturday Night Snow Level
None'
Sunday Snow Level
None'
Sunday Night Snow Level
None'
Stevens Pass Elevation
Saturday Afternoon Snow Level
None'
Saturday Night Snow Level
None'
Sunday Snow Level
None'
Sunday Night Snow Level
None'
Snoqualmie Pass Elevation
Saturday Afternoon Snow Level
5000'
Saturday Night Snow Level
4500'
Sunday Snow Level
5000'
Sunday Night Snow Level
4500'
Mt. Rainier & Crystal Elevation
Saturday Afternoon Snow Level
None'
Saturday Night Snow Level
None'
Sunday Snow Level
None'
Sunday Night Snow Level
None'
Mt. Hood Elevation
Saturday Afternoon Snow Level
5500'
Saturday Night Snow Level
5000'
Sunday Snow Level
5000'
Sunday 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

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

Free Winds at 5000' (mph)

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

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 Afternoon SSE 5 - 10 SE 5 - 10 W 10 - 20 --- None - None W 10 - 20
Saturday Night WNW 5 - 15 SSW 5 - 15 W 15 - 25 --- None - None W 5 - 15
Sunday WNW 5 - 15 NW 5 - 15 W 10 - 15 --- None - None W 10 - 15
Mt. Baker Direction - Speed
Saturday Afternoon SSE 5 - 10
Saturday Night WNW 5 - 15
Sunday WNW 5 - 15
Sunday Night NNW 0 - 10
Washington Pass Direction - Speed
Saturday Afternoon SE 5 - 10
Saturday Night SSW 5 - 15
Sunday NW 5 - 15
Sunday Night NNW 0 - 10
Stevens and Snoqualmie Pass Direction - Speed
Saturday Afternoon W 10 - 20
Saturday Night W 15 - 25
Sunday W 10 - 15
Sunday Night NW 0 - 10
Mt. Rainier Direction - Speed
Saturday Afternoon --- None - None
Saturday Night --- None - None
Sunday --- None - None
Sunday Night --- None - None
Mt. Hood Direction - Speed
Saturday Afternoon W 10 - 20
Saturday Night W 5 - 15
Sunday W 10 - 15
Sunday Night NW 0 - 10

Extended Weather Synopsis for Monday night through Wednesday

A weak trough of low pressure should pass southward offshore Monday to maintain a chance of light showers, mainly early Monday.

High pressure should begin building offshore later Monday to allow for gradual warming and clearing.

Upper level high pressure is expected to build offshore Tuesday and shift inland across B.C. late Tuesday. The ridge of high pressure gains strength Wednesday and builds inland. This should usher a return to clearing and warming beginning Tuesday and continuing Wednesday with freezing levels climbing near or above 10,000 ft by Wednesday.

Extended Weather

Olympics, Washington Cascades and Mt. Hood Area
Monday Light rain and snow showers early. Decreasing showers with partial clearing Monday afternoon. Becoming mostly clear overnight.
Tuesday Becoming mostly sunny and warmer. Clear and mild overnight.

Extended Snow/Freezing Levels

Mt. Baker Snoqualmie Pass Mt. Hood Easterly Flow *
Monday Snow Level 4000' - 5500' 4000' - 5500' 4000' - 5500'
Monday Night Freezing Level 5000' - 6000' 5000' - 6000' 5000' - 6000'
Tuesday Freezing Level 6000' - 7000' 5500' - 7500' 6000' - 8000'
Tuesday Night Freezing Level 8000' - 9000' 8000' - 9000' 8000' - 9000'
Mt. Baker Elevation
Monday Snow Level
4000' - 5500'
Monday Night Freezing Level
5000' - 6000'
Tuesday Freezing Level
6000' - 7000'
Tuesday Night Freezing Level
8000' - 9000'
Wednesday Freezing Level
9500' - 10500'
Snoqualmie Pass Elevation
Monday Snow Level
4000' - 5500'
Monday Night Freezing Level
5000' - 6000'
Tuesday Freezing Level
5500' - 7500'
Tuesday Night Freezing Level
8000' - 9000'
Wednesday Freezing Level
10000' - 11000'
Mt. Hood Elevation
Monday Snow Level
4000' - 5500'
Monday Night Freezing Level
5000' - 6000'
Tuesday Freezing Level
6000' - 8000'
Tuesday Night Freezing Level
8000' - 9000'
Wednesday Freezing Level
10000' - 11000'

* 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 April 27, 2018

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