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Mountain Weather Forecast

Issued: 2:28 PM PST Monday, March 25, 2024
by Dennis D'Amico

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

Weather Synopsis for Monday night through Wednesday

A weak front is pushing through the area this afternoon and re-invigorating shower activity across the region. As the front shifts to the east tonight, onshore flow will increase and we'll see a Puget Sound Convergence zone take aim at the central Cascades from near I-90 to Hwy2 along with moderate westerly ridgeline winds. Another area of heavier showers will occur near Mt Hood and the base of the upper level trough. The area of convergence will shift north on Tuesday morning, shifting the shower focus to the Mt Loop Hwy and the Mt Baker area.  Showers will become more scattered in the afternoon, with cloudier skies and sunbreaks along the west slopes of the Cascades/Olympics and Mt Hood and sunnier conditions along the east slopes of the Cascades. Snowfall totals through mid-day Tuesday should average 2-6" with 4-10" more likely for Mt Hood and along the west slopes of the Cascades affected by the convergence zone.  

The wet weather will keep chugging through the short term. A stronger Pacific frontal system will move in late Tuesday night.  Warm frontal precipitation will spread inland early Wednesday morning and a cold front will pass through Wednesday afternoon. The front will deliver a modest shot of snow above 3000-4000', with higher totals likely for the volcanoes favored in southerly flow. 

Weather Forecast

Olympics
Monday Night Cloudy with scattered light to occasionally moderate rain and snow showers.
Cloudy with light rain and snow showers in the morning, then mostly cloudy with scattered showers and sunbreaks in the afternoon.
West North
Monday Night Cloudy with scattered light to occasionally moderate rain and snow showers.
Light to moderate rain and snow showers in the morning, becoming mostly cloudy with light scattered showers and sunbreaks in the afternoon.
West Central
Monday Night Light to occasionally moderate rain and snow showers. Heaviest showers near areas of convergence overnight. Moderate ridgeline winds.
Light to moderate rain and snow showers in the morning, becoming mostly cloudy with light scattered showers and sunbreaks in the afternoon. Moderate ridgeline winds.
West South
Monday Night Light to occasionally moderate rain and snow showers. Moderate ridgeline winds.
Light to occasionally moderate rain and snow showers in the morning, becoming mostly cloudy with light scattered showers and sunbreaks in the afternoon. Moderate ridgeline winds.
Stevens Pass
Monday Night Light to occasionally moderate rain and snow showers. Heaviest showers near areas of convergence overnight. Light to moderate Pass level and ridgeline W winds.
Light to occasionally moderate rain and snow showers in the morning, becoming mostly cloudy with light scattered showers and sunbreaks in the afternoon. Moderate Pass level and ridgeline W winds.
Snoqualmie Pass
Monday Night Light to occasionally moderate rain and snow showers. Heaviest showers near areas of convergence overnight. Moderate Pass level and ridgeline W winds.
Light to occasionally moderate rain and snow showers in the morning, becoming mostly cloudy with light scattered showers and sunbreaks in the afternoon. Moderate Pass level and ridgeline W winds.
East North
Monday Night Cloudy with scattered light rain and snow showers.
Mostly cloudy with light rain and snow showers in the morning, then partly to mostly sunny in the afternoon. Moderate ridgeline winds.
East Central
Monday Night Cloudy with scattered light rain and snow showers. Heavier showers downwind of the convergence zone late tonight. Moderate ridgeline winds.
Mostly cloudy with light rain and snow showers in the morning, heaviest downwind of the convergence zone in the morning. Becoming partly to mostly sunny in the afternoon. Moderate ridgeline winds.
East South
Monday Night Cloudy with scattered light rain and snow showers. Moderate ridgeline winds.
Mostly cloudy with light rain and snow showers in the morning, then partly to mostly sunny in the afternoon. Moderate ridgeline winds.
Mt. Hood
Monday Night Light to moderate rain and snow showers. Strong ridgeline winds.
Light to occasionally moderate rain and snow showers in the morning, becoming mostly cloudy with light scattered showers and sunbreaks in the afternoon. Moderate to strong ridgeline winds.

Snow/Freezing Level (ft)

Hurricane Ridge Mt. Baker Washington Pass Leavenworth Stevens Pass Snoqualmie Pass Mt. Rainier, Crystal & White Pass Mt. Hood
Monday Evening Snow Level None' None' None' None' 3500' 3500' None' 3500'
Monday Night Snow Level None' None' None' None' 3000' 3000' None' 3000'
Tuesday Morning Snow Level None' None' None' None' 3000' 3000' None' 3000'
Tuesday Afternoon Snow Level None' None' None' None' 4000' 4000' None' 4500'
Tuesday Evening Snow Level None' None' None' None' 3500' 3500' None' 4000'
Tuesday Night Snow Level None' None' None' None' 3000' 3000' None' 3500'
Wednesday Morning Snow Level* None' None' None' None' 3500' 3500' None' 4000'
Hurricane Ridge Elevation
Monday Evening Snow Level
None'
Monday Night Snow Level
None'
Tuesday Morning Snow Level
None'
Tuesday Afternoon Snow Level
None'
Tuesday Evening Snow Level
None'
Tuesday Night Snow Level
None'
Wednesday Morning Snow Level
None'
(Easterly Flow *)
Wednesday Afternoon Snow Level
None'
Mt. Baker Elevation
Monday Evening Snow Level
None'
Monday Night Snow Level
None'
Tuesday Morning Snow Level
None'
Tuesday Afternoon Snow Level
None'
Tuesday Evening Snow Level
None'
Tuesday Night Snow Level
None'
Wednesday Morning Snow Level
None'
(Easterly Flow *)
Wednesday Afternoon Snow Level
None'
Washington Pass Elevation
Monday Evening Snow Level
None'
Monday Night Snow Level
None'
Tuesday Morning Snow Level
None'
Tuesday Afternoon Snow Level
None'
Tuesday Evening Snow Level
None'
Tuesday Night Snow Level
None'
Wednesday Morning Snow Level
None'
(Easterly Flow *)
Wednesday Afternoon Snow Level
None'
Leavenworth Elevation
Monday Evening Snow Level
None'
Monday Night Snow Level
None'
Tuesday Morning Snow Level
None'
Tuesday Afternoon Snow Level
None'
Tuesday Evening Snow Level
None'
Tuesday Night Snow Level
None'
Wednesday Morning Snow Level
None'
(Easterly Flow *)
Wednesday Afternoon Snow Level
None'
Stevens Pass Elevation
Monday Evening Snow Level
3500'
Monday Night Snow Level
3000'
Tuesday Morning Snow Level
3000'
Tuesday Afternoon Snow Level
4000'
Tuesday Evening Snow Level
3500'
Tuesday Night Snow Level
3000'
Wednesday Morning Snow Level
3500'
(Easterly Flow *)
Wednesday Afternoon Snow Level
4000'
Snoqualmie Pass Elevation
Monday Evening Snow Level
3500'
Monday Night Snow Level
3000'
Tuesday Morning Snow Level
3000'
Tuesday Afternoon Snow Level
4000'
Tuesday Evening Snow Level
3500'
Tuesday Night Snow Level
3000'
Wednesday Morning Snow Level
3500'
(Easterly Flow *)
Wednesday Afternoon Snow Level
4000'
Mt. Rainier & Crystal Elevation
Monday Evening Snow Level
None'
Monday Night Snow Level
None'
Tuesday Morning Snow Level
None'
Tuesday Afternoon Snow Level
None'
Tuesday Evening Snow Level
None'
Tuesday Night Snow Level
None'
Wednesday Morning Snow Level
None'
(Easterly Flow *)
Wednesday Afternoon Snow Level
None'
Mt. Hood Elevation
Monday Evening Snow Level
3500'
Monday Night Snow Level
3000'
Tuesday Morning Snow Level
3000'
Tuesday Afternoon Snow Level
4500'
Tuesday Evening Snow Level
4000'
Tuesday Night Snow Level
3500'
Wednesday Morning Snow Level
4000'
(Easterly Flow *)
Wednesday Afternoon 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

Monday Night Tuesday Tuesday Night Wednesday
5 pm - 5 am 5 am - 5 pm 5 pm - 5 am 5 am - 5 pm
Hurricane Ridge LT 0.25 LT 0.10 LT 0.10 0.25 - 0.50
Mt Baker Ski Area LT 0.25 0.25 0 0.75 - 1.00
Mt. Loop - Barlow Pass 0.25 0.25 LT 0.10 0.50 - 0.75
Stevens Pass LT 0.25 LT 0.25 0 0.25 - 0.50
Snoqualmie Pass 0.25 - 0.50 0.25 LT 0.10 0.50
Crystal Mt LT 0.25 LT 0.10 LT 0.10 0.75
Paradise 0.25 LT 0.25 LT 0.10 0.75
White Pass LT 0.25 LT 0.10 LT 0.10 0.25 - 0.50
Washington Pass LT 0.10 LT 0.10 0 LT 0.25
Mission Ridge LT 0.10 0 0 0.25
Salmon la Sac - Gallagher Head LT 0.25 LT 0.10 0 0.25
Tieton River - Darland Mt. LT 0.10 LT 0.10 LT 0.10 0.25 - 0.50
Mt Hood Meadows 0.50 LT 0.25 LT 0.25 0.50 - 0.75
0.75 0.25 LT 0.25 0.75
Hurricane Ridge Precipitation Forecast
Monday Night LT 0.25
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday 0.25 - 0.50
Mt Baker Ski Area Precipitation Forecast
Monday Night LT 0.25
Tuesday 0.25
Tuesday Night 0
Wednesday 0.75 - 1.00
Mt. Loop - Barlow Pass Precipitation Forecast
Monday Night 0.25
Tuesday 0.25
Tuesday Night LT 0.10
Wednesday 0.50 - 0.75
Stevens Pass Precipitation Forecast
Monday Night LT 0.25
Tuesday LT 0.25
Tuesday Night 0
Wednesday 0.25 - 0.50
Snoqualmie Pass Precipitation Forecast
Monday Night 0.25 - 0.50
Tuesday 0.25
Tuesday Night LT 0.10
Wednesday 0.50
Crystal Mt Precipitation Forecast
Monday Night LT 0.25
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday 0.75
Paradise Precipitation Forecast
Monday Night 0.25
Tuesday LT 0.25
Tuesday Night LT 0.10
Wednesday 0.75
White Pass Precipitation Forecast
Monday Night LT 0.25
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday 0.25 - 0.50
Washington Pass Precipitation Forecast
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night 0
Wednesday LT 0.25
Mission Ridge Precipitation Forecast
Monday Night LT 0.10
Tuesday 0
Tuesday Night 0
Wednesday 0.25
Salmon la Sac - Gallagher Head Precipitation Forecast
Monday Night LT 0.25
Tuesday LT 0.10
Tuesday Night 0
Wednesday 0.25
Tieton River - Darland Mt. Precipitation Forecast
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday 0.25 - 0.50
Mt Hood Meadows Precipitation Forecast
Monday Night 0.50
Tuesday LT 0.25
Tuesday Night LT 0.25
Wednesday 0.50 - 0.75
Timberline Precipitation Forecast
Monday Night 0.75
Tuesday 0.25
Tuesday Night LT 0.25
Wednesday 0.75

Free Winds at 5000' (mph)

Hurricane Ridge Mt. Baker Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Monday Evening --- None - None --- None - None --- None - None --- None - None W None - None
Monday Night --- None - None --- None - None --- None - None --- None - None W None - None
Tuesday Morning --- None - None --- None - None --- None - None --- None - None WNW None - None
Hurricane Ridge Elevation
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Mt. Baker Elevation
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Stevens and Snoqualmie Pass Elevation
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Mt. Rainier Elevation
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Mt. Hood Elevation
Monday Evening W None - None
Monday Night W None - None
Tuesday Morning WNW None - None
Tuesday Afternoon W None - None
Hurricane Ridge Direction - Speed
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Mt. Baker Direction - Speed
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Stevens and Snoqualmie Pass Direction - Speed
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Mt. Rainier Direction - Speed
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Mt. Hood Direction - Speed
Monday Evening W None - None
Monday Night W None - None
Tuesday Morning WNW None - None
Tuesday Afternoon W None - None

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
Monday Evening --- None - None --- None - None --- None - None --- None - None --- None - None
Monday Night --- None - None --- None - None --- None - None --- None - None --- None - None
Tuesday Morning --- None - None --- None - None --- None - None --- None - None --- None - None
Mt. Baker Direction - Speed
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Washington Pass Direction - Speed
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Stevens and Snoqualmie Pass Direction - Speed
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Mt. Rainier Direction - Speed
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None
Mt. Hood Direction - Speed
Monday Evening --- None - None
Monday Night --- None - None
Tuesday Morning --- None - None
Tuesday Afternoon --- None - None

Extended Weather Synopsis for Wednesday night through Friday

Showers will become more scattered Wednesday night and Thursday, except they'll be a bit heavier and more persistent for the Olympics since they sit closer to the trailing upper low.  We'll see a similar diurnal trend as earlier in the week with snow levels starting out near 3000' and rising to 4000-5000' in the Thursday afternoon.

On Friday, we'll see the upper low pull away and dive south along the Oregon/California coast.  However, an upper level trough extending SW from Alberta will keep an unstable air mass over Washington state and lead to scattered afternoon mountain showers. Drier and milder conditions are likely over the weekend as a ridge of high pressure attempts to build over the area. 

Extended Snow/Freezing Levels

Mt. Baker Snoqualmie Pass Mt. Hood Easterly Flow *
Wednesday Night Snow Level None' - None' None' - None' None' - None'
Thursday Snow Level None' - None' None' - None' None' - None'
Thursday Night Snow Level None' - None' None' - None' None' - None'
Mt. Baker Elevation
Wednesday Night Snow Level
None' - None'
Thursday Snow Level
None' - None'
Thursday Night Snow Level
None' - None'
Friday Snow Level
None' - None'
Snoqualmie Pass Elevation
Wednesday Night Snow Level
None' - None'
Thursday Snow Level
None' - None'
Thursday Night Snow Level
None' - None'
Friday Snow Level
None' - None'
Mt. Hood Elevation
Wednesday Night Snow Level
None' - None'
Thursday Snow Level
None' - None'
Thursday Night Snow Level
None' - None'
Friday Snow Level
None' - None'

* 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 March 25, 2024

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