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Mountain Weather Forecast

Issued: 7:10 AM PST Saturday, December 30, 2017
by Kenny Kramer

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

Weather Synopsis for Saturday & Sunday

An upper trough will move across the PNW Saturday morning, following a strong frontal passage late Friday. Strong moist westerly flow is maintaining light to moderate orographic showers along the west slopes of the Cascades and volcanic peaks early Saturday at lowering snow levels.

The strong flow and showers should persist through midday Saturday then quickly diminish or end by afternoon as the flow weakens and high pressure begins building along the coast.

A building ridge of high pressure should allow for continued dry weather and clearing from Saturday night through Sunday. Freezing levels will begin to rise Sunday in response to the building high pressure ridge. However, a shift to easterly winds in the passes will maintain cool air in the passes.

Weather Forecast

Olympics
Saturday Light snow showers ending late morning or near midday. Mostly cloudy afternoon. Decreasing westerly winds.
Saturday Night Becoming mostly clear and cool. Light winds.
Sunday Mostly sunny with a warming trend. Light winds.
Mostly clear and warming.
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
Saturday Light to moderate snow showers in the morning, diminishing midday becoming light. Snow showers becoming isolated or ending late afternoon.
Saturday Night Decreasing clouds.
Sunday Mostly sunny with a warming trend, except remaining cool in the passes. Light winds.
Mostly clear.
East Slopes of the Washington Cascades
Saturday Decreasing light to moderate snow showers at higher elevations in the morning becoming isolated, light snow showers at higher elevations in the afternoon.
Saturday Night Becoming mostly clear.
Sunday Mostly sunny with a warming trend, except remaining cool in the passes. Light winds.
Mostly clear.
Mt. Hood
Saturday Light to moderate snow showers in the morning, diminishing midday becoming light. Snow showers becoming isolated or ending late afternoon. Strong west winds early, diminishing afternoon.
Saturday Night Becoming mostly clear. Light winds.
Sunday Mostly sunny with a warming trend. Light winds.
Mostly clear.

Snow/Freezing Level (ft)

Hurricane Ridge Mt. Baker Washington Pass Leavenworth Stevens Pass Snoqualmie Pass Mt. Rainier, Crystal & White Pass Mt. Hood
Saturday Morning Snow Level 2500' 2000' 1500' None' None' 2500' None' 3000'
Saturday Afternoon Snow Level 2000' 1000' 1000' None' None' 2000' None' 3000'
Saturday Night Freezing Level* 3000' 2000' 2000' None' None' 3000' None' 4000'
Sunday Morning Freezing Level* 4000' 2000' 500' None' None' 4000' None' 7000'
Sunday Afternoon Freezing Level* 6500' 3500' 500' None' None' 6000' None' 7500'
Hurricane Ridge Elevation
Saturday Morning Snow Level
2500'
Saturday Afternoon Snow Level
2000'
Saturday Night Freezing Level
3000'
(Easterly Flow *)
Sunday Morning Freezing Level
4000'
(Easterly Flow *)
Sunday Afternoon Freezing Level
6500'
(Easterly Flow *)
Sunday Night Freezing Level
7000'
(Easterly Flow *)
Mt. Baker Elevation
Saturday Morning Snow Level
2000'
Saturday Afternoon Snow Level
1000'
Saturday Night Freezing Level
2000'
(Easterly Flow *)
Sunday Morning Freezing Level
2000'
(Easterly Flow *)
Sunday Afternoon Freezing Level
3500'
(Easterly Flow *)
Sunday Night Freezing Level
5000'
(Easterly Flow *)
Washington Pass Elevation
Saturday Morning Snow Level
1500'
Saturday Afternoon Snow Level
1000'
Saturday Night Freezing Level
2000'
(Easterly Flow *)
Sunday Morning Freezing Level
500'
(Easterly Flow *)
Sunday Afternoon Freezing Level
500'
(Easterly Flow *)
Sunday Night Freezing Level
3000'
(Easterly Flow *)
Leavenworth Elevation
Saturday Morning Snow Level
None'
Saturday Afternoon Snow Level
None'
Saturday Night Freezing Level
None'
(Easterly Flow *)
Sunday Morning Freezing Level
None'
(Easterly Flow *)
Sunday Afternoon Freezing Level
None'
(Easterly Flow *)
Sunday Night Freezing Level
None'
(Easterly Flow *)
Stevens Pass Elevation
Saturday Morning Snow Level
None'
Saturday Afternoon Snow Level
None'
Saturday Night Freezing Level
None'
(Easterly Flow *)
Sunday Morning Freezing Level
None'
(Easterly Flow *)
Sunday Afternoon Freezing Level
None'
(Easterly Flow *)
Sunday Night Freezing Level
None'
(Easterly Flow *)
Snoqualmie Pass Elevation
Saturday Morning Snow Level
2500'
Saturday Afternoon Snow Level
2000'
Saturday Night Freezing Level
3000'
(Easterly Flow *)
Sunday Morning Freezing Level
4000'
(Easterly Flow *)
Sunday Afternoon Freezing Level
6000'
(Easterly Flow *)
Sunday Night Freezing Level
6500'
(Easterly Flow *)
Mt. Rainier & Crystal Elevation
Saturday Morning Snow Level
None'
Saturday Afternoon Snow Level
None'
Saturday Night Freezing Level
None'
(Easterly Flow *)
Sunday Morning Freezing Level
None'
(Easterly Flow *)
Sunday Afternoon Freezing Level
None'
(Easterly Flow *)
Sunday Night Freezing Level
None'
(Easterly Flow *)
Mt. Hood Elevation
Saturday Morning Snow Level
3000'
Saturday Afternoon Snow Level
3000'
Saturday Night Freezing Level
4000'
(Easterly Flow *)
Sunday Morning Freezing Level
7000'
(Easterly Flow *)
Sunday Afternoon Freezing Level
7500'
(Easterly Flow *)
Sunday Night Freezing Level
7500'
(Easterly Flow *)

* 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 LT 0.10 0
Mt Baker Ski Area 0.25 - 0.50 0
Washington Pass LT 0.25 0
Stevens Pass 0.25 - 0.50 0
Snoqualmie Pass 0.50 0
Mission Ridge LT 0.10 0
Crystal Mt LT 0.25 0
Paradise 0.25 - 0.50 0
White Pass 0.25 0
Mt Hood Meadows 0.25 - 0.50 0
0.50 0
Hurricane Ridge Precipitation Forecast
Sunday LT 0.10
Monday 0
Mt Baker Ski Area Precipitation Forecast
Sunday 0.25 - 0.50
Monday 0
Washington Pass Precipitation Forecast
Sunday LT 0.25
Monday 0
Stevens Pass Precipitation Forecast
Sunday 0.25 - 0.50
Monday 0
Snoqualmie Pass Precipitation Forecast
Sunday 0.50
Monday 0
Mission Ridge Precipitation Forecast
Sunday LT 0.10
Monday 0
Crystal Mt Precipitation Forecast
Sunday LT 0.25
Monday 0
Paradise Precipitation Forecast
Sunday 0.25 - 0.50
Monday 0
White Pass Precipitation Forecast
Sunday 0.25
Monday 0
Mt Hood Meadows Precipitation Forecast
Sunday 0.25 - 0.50
Monday 0
Timberline Precipitation Forecast
Sunday 0.50
Monday 0

Free Winds at 5000' (mph)

Hurricane Ridge Mt. Baker Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Saturday Morning W 25 - 35 W 15 - 25 W 30 - 40 --- None - None W 30 - 40
Saturday Afternoon NW 5 - 15 NW 5 - 15 NW 15 - 25 --- None - None NW 10 - 20
Saturday Night N 0 - 10 SSW 5 - 10 VAR 0 - 10 --- None - None E 5 - 15
Sunday Morning E 5 - 15 E 5 - 10 E 10 - 20 --- None - None E 10 - 20
Sunday Afternoon E 0 - 10 SW 0 - 10 ESE 15 - 25 --- None - None ESE 5 - 15
Hurricane Ridge Elevation
Saturday Morning W 25 - 35
Saturday Afternoon NW 5 - 15
Saturday Night N 0 - 10
Sunday Morning E 5 - 15
Sunday Afternoon E 0 - 10
Sunday Night VAR 0 - 10
Mt. Baker Elevation
Saturday Morning W 15 - 25
Saturday Afternoon NW 5 - 15
Saturday Night SSW 5 - 10
Sunday Morning E 5 - 10
Sunday Afternoon SW 0 - 10
Sunday Night VAR 0 - 10
Stevens and Snoqualmie Pass Elevation
Saturday Morning W 30 - 40
Saturday Afternoon NW 15 - 25
Saturday Night VAR 0 - 10
Sunday Morning E 10 - 20
Sunday Afternoon ESE 15 - 25
Sunday Night ESE 0 - 10
Mt. Rainier Elevation
Saturday Morning --- None - None
Saturday Afternoon --- None - None
Saturday Night --- None - None
Sunday Morning --- None - None
Sunday Afternoon --- None - None
Sunday Night --- None - None
Mt. Hood Elevation
Saturday Morning W 30 - 40
Saturday Afternoon NW 10 - 20
Saturday Night E 5 - 15
Sunday Morning E 10 - 20
Sunday Afternoon ESE 5 - 15
Sunday Night SW 0 - 10
Hurricane Ridge Direction - Speed
Saturday Morning W 25 - 35
Saturday Afternoon NW 5 - 15
Saturday Night N 0 - 10
Sunday Morning E 5 - 15
Sunday Afternoon E 0 - 10
Sunday Night VAR 0 - 10
Mt. Baker Direction - Speed
Saturday Morning W 15 - 25
Saturday Afternoon NW 5 - 15
Saturday Night SSW 5 - 10
Sunday Morning E 5 - 10
Sunday Afternoon SW 0 - 10
Sunday Night VAR 0 - 10
Stevens and Snoqualmie Pass Direction - Speed
Saturday Morning W 30 - 40
Saturday Afternoon NW 15 - 25
Saturday Night VAR 0 - 10
Sunday Morning E 10 - 20
Sunday Afternoon ESE 15 - 25
Sunday Night ESE 0 - 10
Mt. Rainier Direction - Speed
Saturday Morning --- None - None
Saturday Afternoon --- None - None
Saturday Night --- None - None
Sunday Morning --- None - None
Sunday Afternoon --- None - None
Sunday Night --- None - None
Mt. Hood Direction - Speed
Saturday Morning W 30 - 40
Saturday Afternoon NW 10 - 20
Saturday Night E 5 - 15
Sunday Morning E 10 - 20
Sunday Afternoon ESE 5 - 15
Sunday Night SW 0 - 10

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 Morning W 45 - 55 W 45 - 55 W 45 - 55 --- None - None W 45 - 55
Saturday Afternoon NW 20 - 30 NW 20 - 30 NW 25 - 35 --- None - None NW 20 - 30
Saturday Night NW 10 - 20 NW 10 - 20 NW 10 - 20 --- None - None NW 5 - 15
Sunday Morning NNW 10 - 20 NNW 10 - 20 NNW 10 - 20 --- None - None WNW 5 - 15
Sunday Afternoon NW 10 - 20 NW 10 - 20 NW 10 - 20 --- None - None NW 10 - 20
Mt. Baker Direction - Speed
Saturday Morning W 45 - 55
Saturday Afternoon NW 20 - 30
Saturday Night NW 10 - 20
Sunday Morning NNW 10 - 20
Sunday Afternoon NW 10 - 20
Sunday Night NW 15 - 25
Washington Pass Direction - Speed
Saturday Morning W 45 - 55
Saturday Afternoon NW 20 - 30
Saturday Night NW 10 - 20
Sunday Morning NNW 10 - 20
Sunday Afternoon NW 10 - 20
Sunday Night NW 15 - 25
Stevens and Snoqualmie Pass Direction - Speed
Saturday Morning W 45 - 55
Saturday Afternoon NW 25 - 35
Saturday Night NW 10 - 20
Sunday Morning NNW 10 - 20
Sunday Afternoon NW 10 - 20
Sunday Night NW 10 - 20
Mt. Rainier Direction - Speed
Saturday Morning --- None - None
Saturday Afternoon --- None - None
Saturday Night --- None - None
Sunday Morning --- None - None
Sunday Afternoon --- None - None
Sunday Night --- None - None
Mt. Hood Direction - Speed
Saturday Morning W 45 - 55
Saturday Afternoon NW 20 - 30
Saturday Night NW 5 - 15
Sunday Morning WNW 5 - 15
Sunday Afternoon NW 10 - 20
Sunday Night WNW 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.

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

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