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Mountain Weather Forecast

Issued: 2:31 PM PST Thursday, January 10, 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 Thursday night through Saturday

The Pacific Northwest will be quite mild at the end of this prolonged period of warm generally southerly flow which has scoured out the cold air pool east of the Cascade Crest. Meanwhile, a ridge is amplifying across the Inter-mountain West, pushing out the last moisture from the moist southerly flow during the early evening hours. The ridge diverts storms to the north and south of our region. It will also re-amplify the pressure gradient across the Cascades, setting up a prolonged pattern of moderate easterly flow. Inversion conditions will also develop, leaving a shallow pool of cold air in the deeper valleys east of the Cascade Crest. This low cloud will likely stream through the lower Cascade passes.

The Freezing level will climb to 7000 ft or higher in many locations west of the Cascade Crest Friday through Saturday. Expect cooler temperature through the pass and on the east slopes with the inversion conditions in place.

Weather Forecast

Hurricane Ridge
Thursday Night Mostly cloudy with decreasing clouds toward daybreak. Moderate and gusty winds in the evening gradually decreasing.
Filtered sunshine. Light to occasionally moderate winds.
Mt. Baker
Thursday Night Very light showers ending in the early evening, then high cloud cover. Moderate winds.
Filtered sunlight early. Becoming mostly sunny late in the day. Light winds.
Washington Pass and Leavenworth
Thursday Night High cloud cover. Inversion conditions developing with low clouds and fog in the valleys. Light to moderate winds. Easterly low-level flow developing.
Decreasing low clouds and fog in the morning with high clouds decreasing throughout the day. Easterly flow. Light winds.
Stevens and Snoqualmie Pass
Thursday Night High cloud cover. Inversion conditions developing with low clouds and fog in the valleys near and east of the Cascade Crest. Accelerating winds west of the major mountain gaps. Moderate low-level easterly flow with light to moderate winds aloft.
Decreasing low clouds and fog in the morning with high clouds decreasing throughout the day. Moderate easterly flow. Light winds.
Mt. Rainier, Crystal and White Pass
Thursday Night High cloud cover. Inversion conditions developing with low clouds and fog in the valleys. Light to moderate winds. Easterly low-level flow developing.
Decreasing low clouds and fog in the morning with high clouds decreasing throughout the day. Moderate easterly flow. Light winds.
Mt. Hood
Thursday Night Clear skies early then high clouds. Moderate easterly low-level flow developing. Moderate ridge-top winds. Inversion conditions developing.
A mix of filtered sunshine and sunshine with moderate winds slightly stronger in the morning. Inversion conditions.

Snow/Freezing Level (ft)

Hurricane Ridge Mt. Baker Washington Pass Leavenworth Stevens Pass Snoqualmie Pass Mt. Rainier, Crystal & White Pass Mt. Hood
Thursday Evening Snow Level* 5000' 4500' 4000' 4500' 4500' 5000' 5000' 6000'
Thursday Night Snow Level* 5500' 4500' 3000' 3000' 3000' 5000' 5000' 6500'
Friday Morning Freezing Level* 7000' 5000' 3500' 3500' 4000' 6000' 6000' 6500'
Friday Afternoon Freezing Level* 7500' 7000' 4500' 4000' 5000' 7000' 7000' 7500'
Friday Evening Freezing Level* 8500' 7500' 5000' 4000' 5000' 7500' 7500' 8000'
Friday Night Freezing Level* 9000' 6000' 4500' 3500' 4500' 7500' 7000' 7000'
Saturday Morning Freezing Level* 8000' 5500' 4500' 3000' 4000' 6500' 5500' 6000'
Hurricane Ridge Elevation
Thursday Evening Snow Level
5000'
(Easterly Flow *)
Thursday Night Snow Level
5500'
(Easterly Flow *)
Friday Morning Freezing Level
7000'
(Easterly Flow *)
Friday Afternoon Freezing Level
7500'
(Easterly Flow *)
Friday Evening Freezing Level
8500'
(Easterly Flow *)
Friday Night Freezing Level
9000'
(Easterly Flow *)
Saturday Morning Freezing Level
8000'
(Easterly Flow *)
Saturday Afternoon Freezing Level
7000'
(Easterly Flow *)
Mt. Baker Elevation
Thursday Evening Snow Level
4500'
(Easterly Flow *)
Thursday Night Snow Level
4500'
(Easterly Flow *)
Friday Morning Freezing Level
5000'
(Easterly Flow *)
Friday Afternoon Freezing Level
7000'
(Easterly Flow *)
Friday Evening Freezing Level
7500'
(Easterly Flow *)
Friday Night Freezing Level
6000'
(Easterly Flow *)
Saturday Morning Freezing Level
5500'
(Easterly Flow *)
Saturday Afternoon Freezing Level
7500'
(Easterly Flow *)
Washington Pass Elevation
Thursday Evening Snow Level
4000'
(Easterly Flow *)
Thursday Night Snow Level
3000'
(Easterly Flow *)
Friday Morning Freezing Level
3500'
(Easterly Flow *)
Friday Afternoon Freezing Level
4500'
(Easterly Flow *)
Friday Evening Freezing Level
5000'
(Easterly Flow *)
Friday Night Freezing Level
4500'
(Easterly Flow *)
Saturday Morning Freezing Level
4500'
(Easterly Flow *)
Saturday Afternoon Freezing Level
5500'
(Easterly Flow *)
Leavenworth Elevation
Thursday Evening Snow Level
4500'
(Easterly Flow *)
Thursday Night Snow Level
3000'
(Easterly Flow *)
Friday Morning Freezing Level
3500'
(Easterly Flow *)
Friday Afternoon Freezing Level
4000'
(Easterly Flow *)
Friday Evening Freezing Level
4000'
(Easterly Flow *)
Friday Night Freezing Level
3500'
(Easterly Flow *)
Saturday Morning Freezing Level
3000'
(Easterly Flow *)
Saturday Afternoon Freezing Level
5000'
(Easterly Flow *)
Stevens Pass Elevation
Thursday Evening Snow Level
4500'
(Easterly Flow *)
Thursday Night Snow Level
3000'
(Easterly Flow *)
Friday Morning Freezing Level
4000'
(Easterly Flow *)
Friday Afternoon Freezing Level
5000'
(Easterly Flow *)
Friday Evening Freezing Level
5000'
(Easterly Flow *)
Friday Night Freezing Level
4500'
(Easterly Flow *)
Saturday Morning Freezing Level
4000'
(Easterly Flow *)
Saturday Afternoon Freezing Level
5500'
(Easterly Flow *)
Snoqualmie Pass Elevation
Thursday Evening Snow Level
5000'
(Easterly Flow *)
Thursday Night Snow Level
5000'
(Easterly Flow *)
Friday Morning Freezing Level
6000'
(Easterly Flow *)
Friday Afternoon Freezing Level
7000'
(Easterly Flow *)
Friday Evening Freezing Level
7500'
(Easterly Flow *)
Friday Night Freezing Level
7500'
(Easterly Flow *)
Saturday Morning Freezing Level
6500'
(Easterly Flow *)
Saturday Afternoon Freezing Level
6800'
(Easterly Flow *)
Mt. Rainier & Crystal Elevation
Thursday Evening Snow Level
5000'
(Easterly Flow *)
Thursday Night Snow Level
5000'
(Easterly Flow *)
Friday Morning Freezing Level
6000'
(Easterly Flow *)
Friday Afternoon Freezing Level
7000'
(Easterly Flow *)
Friday Evening Freezing Level
7500'
(Easterly Flow *)
Friday Night Freezing Level
7000'
(Easterly Flow *)
Saturday Morning Freezing Level
5500'
(Easterly Flow *)
Saturday Afternoon Freezing Level
6500'
(Easterly Flow *)
Mt. Hood Elevation
Thursday Evening Snow Level
6000'
(Easterly Flow *)
Thursday Night Snow Level
6500'
(Easterly Flow *)
Friday Morning Freezing Level
6500'
(Easterly Flow *)
Friday Afternoon Freezing Level
7500'
(Easterly Flow *)
Friday Evening Freezing Level
8000'
(Easterly Flow *)
Friday Night Freezing Level
7000'
(Easterly Flow *)
Saturday Morning Freezing Level
6000'
(Easterly Flow *)
Saturday Afternoon Freezing Level
7000'
(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

Thursday Night Friday Friday Night Saturday
4 pm - 4 am 4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge LT 0.10 0 0 0
Mt Baker Ski Area LT 0.10 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
Thursday Night LT 0.10
Friday 0
Friday Night 0
Saturday 0
Mt Baker Ski Area Precipitation Forecast
Thursday Night LT 0.10
Friday 0
Friday Night 0
Saturday 0
Washington Pass Precipitation Forecast
Thursday Night 0
Friday 0
Friday Night 0
Saturday 0
Leavenworth Precipitation Forecast
Thursday Night 0
Friday 0
Friday Night 0
Saturday 0
Stevens Pass Precipitation Forecast
Thursday Night 0
Friday 0
Friday Night 0
Saturday 0
Snoqualmie Pass Precipitation Forecast
Thursday Night 0
Friday 0
Friday Night 0
Saturday 0
Mission Ridge Precipitation Forecast
Thursday Night 0
Friday 0
Friday Night 0
Saturday 0
Crystal Mt Precipitation Forecast
Thursday Night 0
Friday 0
Friday Night 0
Saturday 0
Paradise Precipitation Forecast
Thursday Night 0
Friday 0
Friday Night 0
Saturday 0
White Pass Precipitation Forecast
Thursday Night 0
Friday 0
Friday Night 0
Saturday 0
Mt Hood Meadows Precipitation Forecast
Thursday Night 0
Friday 0
Friday Night 0
Saturday 0
Timberline Precipitation Forecast
Thursday Night 0
Friday 0
Friday Night 0
Saturday 0

Free Winds at 5000' (mph)

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

Extended Weather Synopsis for Saturday night through Monday

The high-pressure ridge will remain strong over the Pacific Northwest Saturday night through Monday, continuing the pattern from Friday and Saturday. Very high freezing levels are anticipated in the 8,000-11,000 ft range.

The system set to break down the ridge on Tuesday will be a cutoff low just offshore of the California coast which is projected to begin moving northward and will likely impact the region Tuesday night or Wednesday.

Extended Snow/Freezing Levels

Mt. Baker Snoqualmie Pass Mt. Hood Easterly Flow *
Saturday Night Freezing Level 5500' - 6500' 4500' - 6500' 5500' - 6500' *
Sunday Freezing Level 6000' - 7000' 6500' - 7500' 7000' - 8000' *
Sunday Night Freezing Level 8000' - 10000' 9000' - 11000' 9000' - 11000' *
Mt. Baker Elevation
Saturday Night Freezing Level
5500' - 6500'
(Easterly Flow *)
Sunday Freezing Level
6000' - 7000'
(Easterly Flow *)
Sunday Night Freezing Level
8000' - 10000'
(Easterly Flow *)
Monday Freezing Level
8000' - 10000'
(Easterly Flow *)
Snoqualmie Pass Elevation
Saturday Night Freezing Level
4500' - 6500'
(Easterly Flow *)
Sunday Freezing Level
6500' - 7500'
(Easterly Flow *)
Sunday Night Freezing Level
9000' - 11000'
(Easterly Flow *)
Monday Freezing Level
8000' - 10000'
(Easterly Flow *)
Mt. Hood Elevation
Saturday Night Freezing Level
5500' - 6500'
(Easterly Flow *)
Sunday Freezing Level
7000' - 8000'
(Easterly Flow *)
Sunday Night Freezing Level
9000' - 11000'
(Easterly Flow *)
Monday Freezing Level
8000' - 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.

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. 10, 2019

The NWAC program is administered by the USDA-Forest Service and operates from the National Weather Service Forecast Office in Seattle. NWAC services are made possible by important collaboration and support from a wide variety of federal, state and private cooperators.