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Mountain Weather Forecast

Issued: 2:51 PM PST Friday, January 11, 2019
by Robert Hahn

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 night through Sunday

A high-amplitude ridge is centered over Idaho on Friday afternoon. The high pressure will cut off late Friday and will expand slightly westward, increasing the already very warm temperates at mid and upper-levels Saturday night and Sunday over our region.  The ridge and subsequent high will block weather systems from moving eastward, but mid and high-level clouds will remain with us at times into Saturday as a week low skirts northward offshore, brushing the Olympics with some lowering clouds and a possible sprinkle.

Moderate easterly flow will be sustained throughout the forecast period with cooler air at low levels to the east of the Cascade Crest warming as it descends to the Puget Sound lowlands.

A low-level inversion has developed as evidenced by the two stations at Washington Pass where the upper station is above freezing on Friday afternoon. In general, colder air sinks into the deeper valleys, and without wind to stir it up, low clouds and fog will predominate day and night. The easterly flow will suck the low clouds and fog through the lower mountain gaps such as Snoqualmie Pass keeping the passes cool.

More sunshine is expected by Saturday afternoon with mostly clear skies through Sunday as the inversion and moderate east flow continue.

 

Weather Forecast

Hurricane Ridge
Friday Night Partly cloudy with a mix of high and low clouds. Mild. Inversion developing.
Partly cloudy and very mild. Inversion.
Mt. Baker
Friday Night Mostly clear. Mild. Inversion developing.
Filtered sunshine. Very mild. Inversion.
Washington Pass and Leavenworth
Friday Night Periods of high clouds and clear skies. Inversion conditions. Fog and low stratus lingering in the lowlands.
Filtered sunshine. Mild. Inversion. Fog and low stratus lingering in the lowlands.
Stevens and Snoqualmie Pass
Friday Night Periods of high clouds and clear skies. Inversion conditions.Fog and low stratus lingering in the lowlands. Moderate east flow through the passes.
Filtered sunshine, partly clearing in the afternoon. Mild. Inversion. Fog and low stratus lingering in the lowlands. Moderate east flow through the passes.
Mt. Rainier, Crystal and White Pass
Friday Night Periods of high clouds and clear skies. Inversion conditions.
Filtered sunshine, mostly clearing in the afternoon. Mild. Inversion.
Mt. Hood
Friday Night Mix of high clouds and clear skies. Mild. Inversion developing.
Mix of high clouds and sunnies skies with a clearing trend in the afternoon. Mild. Inversion developing.

Snow/Freezing Level (ft)

Hurricane Ridge Mt. Baker Washington Pass Leavenworth Stevens Pass Snoqualmie Pass Mt. Rainier, Crystal & White Pass Mt. Hood
Friday Evening Freezing Level* 8500' 8000' 2000' 1500' 2500' 9000' 9000' 9000'
Friday Night Freezing Level* 8500' 8500' 2500' 1500' 2500' 9000' 9000' 9000'
Saturday Morning Freezing Level* 8000' 8500' 8000' 8000' 8000' 8000' 8500' 8500'
Saturday Afternoon Freezing Level* 7000' 8000' 8000' 8000' 8000' 8000' 8000' 9000'
Saturday Evening Freezing Level* 7500' 8000' 7500' 7500' 7500' 8000' 8500' 9000'
Saturday Night Freezing Level* 8000' 8000' 8500' 9500' 9500' 9500' 10000' 10000'
Sunday Morning Freezing Level* 9500' 9500' 10000' 10500' 10500' 10500' 10000' 1000'
Hurricane Ridge Elevation
Friday Evening Freezing Level
8500'
(Easterly Flow *)
Friday Night Freezing Level
8500'
(Easterly Flow *)
Saturday Morning Freezing Level
8000'
(Easterly Flow *)
Saturday Afternoon Freezing Level
7000'
(Easterly Flow *)
Saturday Evening Freezing Level
7500'
(Easterly Flow *)
Saturday Night Freezing Level
8000'
(Easterly Flow *)
Sunday Morning Freezing Level
9500'
(Easterly Flow *)
Sunday Afternoon Freezing Level
10000'
(Easterly Flow *)
Mt. Baker Elevation
Friday Evening Freezing Level
8000'
(Easterly Flow *)
Friday Night Freezing Level
8500'
(Easterly Flow *)
Saturday Morning Freezing Level
8500'
(Easterly Flow *)
Saturday Afternoon Freezing Level
8000'
(Easterly Flow *)
Saturday Evening Freezing Level
8000'
(Easterly Flow *)
Saturday Night Freezing Level
8000'
(Easterly Flow *)
Sunday Morning Freezing Level
9500'
(Easterly Flow *)
Sunday Afternoon Freezing Level
10000'
(Easterly Flow *)
Washington Pass Elevation
Friday Evening Freezing Level
2000'
(Easterly Flow *)
Friday Night Freezing Level
2500'
(Easterly Flow *)
Saturday Morning Freezing Level
8000'
(Easterly Flow *)
Saturday Afternoon Freezing Level
8000'
(Easterly Flow *)
Saturday Evening Freezing Level
7500'
(Easterly Flow *)
Saturday Night Freezing Level
8500'
(Easterly Flow *)
Sunday Morning Freezing Level
10000'
(Easterly Flow *)
Sunday Afternoon Freezing Level
10500'
(Easterly Flow *)
Leavenworth Elevation
Friday Evening Freezing Level
1500'
(Easterly Flow *)
Friday Night Freezing Level
1500'
(Easterly Flow *)
Saturday Morning Freezing Level
8000'
(Easterly Flow *)
Saturday Afternoon Freezing Level
8000'
(Easterly Flow *)
Saturday Evening Freezing Level
7500'
(Easterly Flow *)
Saturday Night Freezing Level
9500'
(Easterly Flow *)
Sunday Morning Freezing Level
10500'
(Easterly Flow *)
Sunday Afternoon Freezing Level
10500'
(Easterly Flow *)
Stevens Pass Elevation
Friday Evening Freezing Level
2500'
(Easterly Flow *)
Friday Night Freezing Level
2500'
(Easterly Flow *)
Saturday Morning Freezing Level
8000'
(Easterly Flow *)
Saturday Afternoon Freezing Level
8000'
(Easterly Flow *)
Saturday Evening Freezing Level
7500'
(Easterly Flow *)
Saturday Night Freezing Level
9500'
(Easterly Flow *)
Sunday Morning Freezing Level
10500'
(Easterly Flow *)
Sunday Afternoon Freezing Level
10500'
(Easterly Flow *)
Snoqualmie Pass Elevation
Friday Evening Freezing Level
9000'
(Easterly Flow *)
Friday Night Freezing Level
9000'
(Easterly Flow *)
Saturday Morning Freezing Level
8000'
(Easterly Flow *)
Saturday Afternoon Freezing Level
8000'
(Easterly Flow *)
Saturday Evening Freezing Level
8000'
(Easterly Flow *)
Saturday Night Freezing Level
9500'
(Easterly Flow *)
Sunday Morning Freezing Level
10500'
(Easterly Flow *)
Sunday Afternoon Freezing Level
10500'
(Easterly Flow *)
Mt. Rainier & Crystal Elevation
Friday Evening Freezing Level
9000'
(Easterly Flow *)
Friday Night Freezing Level
9000'
(Easterly Flow *)
Saturday Morning Freezing Level
8500'
(Easterly Flow *)
Saturday Afternoon Freezing Level
8000'
(Easterly Flow *)
Saturday Evening Freezing Level
8500'
(Easterly Flow *)
Saturday Night Freezing Level
10000'
(Easterly Flow *)
Sunday Morning Freezing Level
10000'
(Easterly Flow *)
Sunday Afternoon Freezing Level
10500'
(Easterly Flow *)
Mt. Hood Elevation
Friday Evening Freezing Level
9000'
(Easterly Flow *)
Friday Night Freezing Level
9000'
(Easterly Flow *)
Saturday Morning Freezing Level
8500'
(Easterly Flow *)
Saturday Afternoon Freezing Level
9000'
(Easterly Flow *)
Saturday Evening Freezing Level
9000'
(Easterly Flow *)
Saturday Night Freezing Level
10000'
(Easterly Flow *)
Sunday Morning Freezing Level
1000'
(Easterly Flow *)
Sunday Afternoon Freezing Level
10000'
(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

Friday Night Saturday Saturday Night Sunday
4 pm - 4 am 4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge 0 0 0 0
Mt Baker Ski Area 0 0 0 0
Washington Pass 0 0 0 0
Leavenworth 0 0 0 0
Stevens Pass 0 0 0 0
Snoqualmie Pass 0 0 0 0
Mission Ridge 0 0 0 0
Crystal Mt 0 0 0 0
Paradise 0 0 0 0
White Pass 0 0 0 0
Mt Hood Meadows 0 0 0 0
0 0 0 0
Hurricane Ridge Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Mt Baker Ski Area Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Washington Pass Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Leavenworth Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Stevens Pass Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Snoqualmie Pass Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Mission Ridge Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Crystal Mt Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Paradise Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
White Pass Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Mt Hood Meadows Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0
Timberline Precipitation Forecast
Friday Night 0
Saturday 0
Saturday Night 0
Sunday 0

Free Winds at 5000' (mph)

Hurricane Ridge Mt. Baker Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Friday Evening E 10 - 20 E 5 - 15 E 10 - 20 E 5 - 15 ESE 15 - 25
Friday Night E 5 - 15 E 5 - 15 E 10 - 20 ESE 5 - 15 ESE 15 - 25
Saturday Morning ESE 5 - 15 E 5 - 15 ESE 10 - 20 ESE 5 - 15 E 15 - 25
Hurricane Ridge Elevation
Friday Evening E 10 - 20
Friday Night E 5 - 15
Saturday Morning ESE 5 - 15
Saturday Afternoon ESE 0 - 10
Mt. Baker Elevation
Friday Evening E 5 - 15
Friday Night E 5 - 15
Saturday Morning E 5 - 15
Saturday Afternoon E 5 - 15
Stevens and Snoqualmie Pass Elevation
Friday Evening E 10 - 20
Friday Night E 10 - 20
Saturday Morning ESE 10 - 20
Saturday Afternoon E 10 - 20
Mt. Rainier Elevation
Friday Evening E 5 - 15
Friday Night ESE 5 - 15
Saturday Morning ESE 5 - 15
Saturday Afternoon E 5 - 15
Mt. Hood Elevation
Friday Evening ESE 15 - 25
Friday Night ESE 15 - 25
Saturday Morning E 15 - 25
Saturday Afternoon E 15 - 25
Hurricane Ridge Direction - Speed
Friday Evening E 10 - 20
Friday Night E 5 - 15
Saturday Morning ESE 5 - 15
Saturday Afternoon ESE 0 - 10
Mt. Baker Direction - Speed
Friday Evening E 5 - 15
Friday Night E 5 - 15
Saturday Morning E 5 - 15
Saturday Afternoon E 5 - 15
Stevens and Snoqualmie Pass Direction - Speed
Friday Evening E 10 - 20
Friday Night E 10 - 20
Saturday Morning ESE 10 - 20
Saturday Afternoon E 10 - 20
Mt. Rainier Direction - Speed
Friday Evening E 5 - 15
Friday Night ESE 5 - 15
Saturday Morning ESE 5 - 15
Saturday Afternoon E 5 - 15
Mt. Hood Direction - Speed
Friday Evening ESE 15 - 25
Friday Night ESE 15 - 25
Saturday Morning E 15 - 25
Saturday Afternoon E 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 Evening S 20 - 30 SSW 10 - 20 SSE 20 - 30 S 20 - 30 S 25 - 35
Friday Night S 20 - 30 S 15 - 25 S 25 - 35 S 25 - 35 S 20 - 30
Saturday Morning S 20 - 30 S 10 - 20 S 15 - 25 S 15 - 25 S 20 - 30
Mt. Baker Direction - Speed
Friday Evening S 20 - 30
Friday Night S 20 - 30
Saturday Morning S 20 - 30
Saturday Afternoon S 15 - 25
Washington Pass Direction - Speed
Friday Evening SSW 10 - 20
Friday Night S 15 - 25
Saturday Morning S 10 - 20
Saturday Afternoon SSW 10 - 20
Stevens and Snoqualmie Pass Direction - Speed
Friday Evening SSE 20 - 30
Friday Night S 25 - 35
Saturday Morning S 15 - 25
Saturday Afternoon S 15 - 25
Mt. Rainier Direction - Speed
Friday Evening S 20 - 30
Friday Night S 25 - 35
Saturday Morning S 15 - 25
Saturday Afternoon S 20 - 30
Mt. Hood Direction - Speed
Friday Evening S 25 - 35
Friday Night S 20 - 30
Saturday Morning S 20 - 30
Saturday Afternoon S 20 - 30

Extended Weather Synopsis for Sunday night through Tuesday

Sunday night, a cutoff low sits off the California coast in tandem with the high centered over Idaho. Mild, inversion, easterly flow conditions persist.

On Monday, the cutoff low rejoins the subtropical jetstream, but the ridge lingers over our region. 

Monday night through Tuesday night, the cutoff low near California and the two jet streams rejoin and the system begins to move northward toward our region.

Extended Snow/Freezing Levels

Mt. Baker Snoqualmie Pass Mt. Hood Easterly Flow *
Sunday Night Freezing Level 9000' - 11000' 9000' - 11000' 9000' - 11000' *
Monday Freezing Level 9000' - 11000' 8000' - 10000' 8000' - 10000' *
Monday Night Freezing Level 6500' - 8500' 5000' - 7000' 5000' - 7000' *
Mt. Baker Elevation
Sunday Night Freezing Level
9000' - 11000'
(Easterly Flow *)
Monday Freezing Level
9000' - 11000'
(Easterly Flow *)
Monday Night Freezing Level
6500' - 8500'
(Easterly Flow *)
Tuesday Freezing Level
5500' - 7500'
(Easterly Flow *)
Snoqualmie Pass Elevation
Sunday Night Freezing Level
9000' - 11000'
(Easterly Flow *)
Monday Freezing Level
8000' - 10000'
(Easterly Flow *)
Monday Night Freezing Level
5000' - 7000'
(Easterly Flow *)
Tuesday Freezing Level
4000' - 6000'
(Easterly Flow *)
Mt. Hood Elevation
Sunday Night Freezing Level
9000' - 11000'
(Easterly Flow *)
Monday Freezing Level
8000' - 10000'
(Easterly Flow *)
Monday Night Freezing Level
5000' - 7000'
(Easterly Flow *)
Tuesday Freezing Level
4000' - 6000'
(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.

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

Previous forecast from Jan. 11, 2019

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