Issued: 3:08 PM PDT Wednesday, April 24, 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 Wednesday night through Thursday

A flat upper ridge of high pressure should keep fair weather and light winds in the forecast Wednesday night and Thursday. Upper-level moisture associated with a weak shortwave feature should bring some increasing high clouds into the region Wednesday night through Thursday night. These clouds should reduce the diurnal temperature range over the period. The very weak shortwave axis is expected to move through the region Thursday night and it may touch off very light amounts of light rain in the Washington Cascades.

A more significant disturbance is expected to begin to slide down the British Columbia coastline on Friday. Westerly winds should pick up into the moderate range by Friday morning, particularly in the Mt. Hood area and along the east slopes of the Cascades.

Weather Forecast

Hurricane Ridge
Wednesday Night Mostly clear with increasing thin, high clouds. Mild. Light winds.
Mt. Baker
Wednesday Night Mostly clear with slightly increasing thin, high clouds. Mild. Light winds.
Washington Pass and Leavenworth
Wednesday Night Mostly clear with slightly increasing thin, high clouds. Mild. Light winds.
Stevens and Snoqualmie Pass
Wednesday Night Mostly clear with slightly increasing thin, high clouds. Mild. Light W wind early switching E at pass level. Light 5000 ft winds.
Mt. Rainier, Crystal and White Pass
Wednesday Night Mostly clear with slightly increasing thin, high clouds. Mild. Light winds.
Mt. Hood
Wednesday Night Mostly clear. Very mild. Light winds.

Snow/Freezing Level (ft)

Hurricane Ridge Mt. Baker Washington Pass Leavenworth Stevens Pass Snoqualmie Pass Mt. Rainier, Crystal & White Pass Mt. Hood
Wednesday Evening Freezing Level 6500' 6500' 7000' 8000' 7000' 7500' 8000' 9000'
Wednesday Night Freezing Level * 7000' 5000' 5500' 7500' 6500' 7000' 7500' 10000'
Thursday Morning Freezing Level * 7500' 6000' 6000' 7500' 7000' 7000' 8000' 10000'
Thursday Afternoon Freezing Level 7500' 7500' 8000' 8000' 8000' 8000' 8500' 10000'
Thursday Evening Freezing Level 7000' 7500' 8000' 8000' 8000' 8000' 8500' 10000'
Thursday Night Freezing Level 6000' 6000' 7000' 7000' 6500' 6500' 7000' 8500'
Friday Morning Freezing Level 6000' 5000' 5000' 5500' 5000' 5000' 5000' 6000'
Hurricane Ridge Elevation
Wednesday Evening Freezing Level
6500'
Wednesday Night Freezing Level
7000'
(Easterly Flow *)
Thursday Morning Freezing Level
7500'
(Easterly Flow *)
Thursday Afternoon Freezing Level
7500'
Thursday Evening Freezing Level
7000'
Thursday Night Freezing Level
6000'
Friday Morning Freezing Level
6000'
Friday Afternoon Freezing Level
5000'
Mt. Baker Elevation
Wednesday Evening Freezing Level
6500'
Wednesday Night Freezing Level
5000'
(Easterly Flow *)
Thursday Morning Freezing Level
6000'
(Easterly Flow *)
Thursday Afternoon Freezing Level
7500'
Thursday Evening Freezing Level
7500'
Thursday Night Freezing Level
6000'
Friday Morning Freezing Level
5000'
Friday Afternoon Freezing Level
5000'
Washington Pass Elevation
Wednesday Evening Freezing Level
7000'
Wednesday Night Freezing Level
5500'
(Easterly Flow *)
Thursday Morning Freezing Level
6000'
(Easterly Flow *)
Thursday Afternoon Freezing Level
8000'
Thursday Evening Freezing Level
8000'
Thursday Night Freezing Level
7000'
Friday Morning Freezing Level
5000'
Friday Afternoon Freezing Level
6000'
Leavenworth Elevation
Wednesday Evening Freezing Level
8000'
Wednesday Night Freezing Level
7500'
(Easterly Flow *)
Thursday Morning Freezing Level
7500'
(Easterly Flow *)
Thursday Afternoon Freezing Level
8000'
Thursday Evening Freezing Level
8000'
Thursday Night Freezing Level
7000'
Friday Morning Freezing Level
5500'
Friday Afternoon Freezing Level
6000'
Stevens Pass Elevation
Wednesday Evening Freezing Level
7000'
Wednesday Night Freezing Level
6500'
(Easterly Flow *)
Thursday Morning Freezing Level
7000'
(Easterly Flow *)
Thursday Afternoon Freezing Level
8000'
Thursday Evening Freezing Level
8000'
Thursday Night Freezing Level
6500'
Friday Morning Freezing Level
5000'
Friday Afternoon Freezing Level
5500'
Snoqualmie Pass Elevation
Wednesday Evening Freezing Level
7500'
Wednesday Night Freezing Level
7000'
(Easterly Flow *)
Thursday Morning Freezing Level
7000'
(Easterly Flow *)
Thursday Afternoon Freezing Level
8000'
Thursday Evening Freezing Level
8000'
Thursday Night Freezing Level
6500'
Friday Morning Freezing Level
5000'
Friday Afternoon Freezing Level
5500'
Mt. Rainier & Crystal Elevation
Wednesday Evening Freezing Level
8000'
Wednesday Night Freezing Level
7500'
(Easterly Flow *)
Thursday Morning Freezing Level
8000'
(Easterly Flow *)
Thursday Afternoon Freezing Level
8500'
Thursday Evening Freezing Level
8500'
Thursday Night Freezing Level
7000'
Friday Morning Freezing Level
5000'
Friday Afternoon Freezing Level
6000'
Mt. Hood Elevation
Wednesday Evening Freezing Level
9000'
Wednesday Night Freezing Level
10000'
(Easterly Flow *)
Thursday Morning Freezing Level
10000'
(Easterly Flow *)
Thursday Afternoon Freezing Level
10000'
Thursday Evening Freezing Level
10000'
Thursday Night Freezing Level
8500'
Friday Morning Freezing Level
6000'
Friday Afternoon Freezing Level
6500'

* 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

Wednesday Night Thursday Thursday Night Thursday
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 LT 0.10 0
Snoqualmie Pass 0 0 LT 0.10 0
Mission Ridge 0 0 0 0
Crystal Mt 0 0 LT 0.10 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
Wednesday Night 0
Thursday 0
Thursday Night 0
Thursday 0
Mt Baker Ski Area Precipitation Forecast
Wednesday Night 0
Thursday 0
Thursday Night 0
Thursday 0
Washington Pass Precipitation Forecast
Wednesday Night 0
Thursday 0
Thursday Night 0
Thursday 0
Leavenworth Precipitation Forecast
Wednesday Night 0
Thursday 0
Thursday Night 0
Thursday 0
Stevens Pass Precipitation Forecast
Wednesday Night 0
Thursday 0
Thursday Night LT 0.10
Thursday 0
Snoqualmie Pass Precipitation Forecast
Wednesday Night 0
Thursday 0
Thursday Night LT 0.10
Thursday 0
Mission Ridge Precipitation Forecast
Wednesday Night 0
Thursday 0
Thursday Night 0
Thursday 0
Crystal Mt Precipitation Forecast
Wednesday Night 0
Thursday 0
Thursday Night LT 0.10
Thursday 0
Paradise Precipitation Forecast
Wednesday Night 0
Thursday 0
Thursday Night 0
Thursday 0
White Pass Precipitation Forecast
Wednesday Night 0
Thursday 0
Thursday Night 0
Thursday 0
Mt Hood Meadows Precipitation Forecast
Wednesday Night 0
Thursday 0
Thursday Night 0
Thursday 0
Timberline Precipitation Forecast
Wednesday Night 0
Thursday 0
Thursday Night 0
Thursday 0

Free Winds at 5000' (mph)

Hurricane Ridge Mt. Baker Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Wednesday Evening VAR 0 - 10 VAR 0 - 10 WNW 5 - 15 WNW 0 - 10 VAR 0 - 10
Wednesday Night VAR 0 - 10 VAR 0 - 10 VAR 0 - 10 VAR 0 - 10 E 5 - 15
Thursday Morning VAR 0 - 10 VAR 0 - 10 ESE 0 - 10 ESE 0 - 10 E 5 - 15
Hurricane Ridge Elevation
Wednesday Evening VAR 0 - 10
Wednesday Night VAR 0 - 10
Thursday Morning VAR 0 - 10
Thursday Afternoon WSW 0 - 10
Mt. Baker Elevation
Wednesday Evening VAR 0 - 10
Wednesday Night VAR 0 - 10
Thursday Morning VAR 0 - 10
Thursday Afternoon WSW 0 - 10
Stevens and Snoqualmie Pass Elevation
Wednesday Evening WNW 5 - 15
Wednesday Night VAR 0 - 10
Thursday Morning ESE 0 - 10
Thursday Afternoon W 5 - 15
Mt. Rainier Elevation
Wednesday Evening WNW 0 - 10
Wednesday Night VAR 0 - 10
Thursday Morning ESE 0 - 10
Thursday Afternoon W 5 - 15
Mt. Hood Elevation
Wednesday Evening VAR 0 - 10
Wednesday Night E 5 - 15
Thursday Morning E 5 - 15
Thursday Afternoon W 5 - 15
Hurricane Ridge Direction - Speed
Wednesday Evening VAR 0 - 10
Wednesday Night VAR 0 - 10
Thursday Morning VAR 0 - 10
Thursday Afternoon WSW 0 - 10
Mt. Baker Direction - Speed
Wednesday Evening VAR 0 - 10
Wednesday Night VAR 0 - 10
Thursday Morning VAR 0 - 10
Thursday Afternoon WSW 0 - 10
Stevens and Snoqualmie Pass Direction - Speed
Wednesday Evening WNW 5 - 15
Wednesday Night VAR 0 - 10
Thursday Morning ESE 0 - 10
Thursday Afternoon W 5 - 15
Mt. Rainier Direction - Speed
Wednesday Evening WNW 0 - 10
Wednesday Night VAR 0 - 10
Thursday Morning ESE 0 - 10
Thursday Afternoon W 5 - 15
Mt. Hood Direction - Speed
Wednesday Evening VAR 0 - 10
Wednesday Night E 5 - 15
Thursday Morning E 5 - 15
Thursday Afternoon W 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.

Free Winds at 9000' (mph)

Mt. Baker Washington Pass Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Wednesday Evening W 10 - 20 W 5 - 15 W 10 - 20 W 10 - 20 W 10 - 20
Wednesday Night W 10 - 20 SW 10 - 20 WSW 10 - 20 WSW 10 - 20 WSW 5 - 15
Thursday Morning SSW 5 - 15 SSW 5 - 15 WSW 10 - 20 WSW 10 - 20 WSW 10 - 20
Mt. Baker Direction - Speed
Wednesday Evening W 10 - 20
Wednesday Night W 10 - 20
Thursday Morning SSW 5 - 15
Thursday Afternoon SSW 10 - 20
Washington Pass Direction - Speed
Wednesday Evening W 5 - 15
Wednesday Night SW 10 - 20
Thursday Morning SSW 5 - 15
Thursday Afternoon SW 10 - 20
Stevens and Snoqualmie Pass Direction - Speed
Wednesday Evening W 10 - 20
Wednesday Night WSW 10 - 20
Thursday Morning WSW 10 - 20
Thursday Afternoon SW 15 - 25
Mt. Rainier Direction - Speed
Wednesday Evening W 10 - 20
Wednesday Night WSW 10 - 20
Thursday Morning WSW 10 - 20
Thursday Afternoon SW 10 - 20
Mt. Hood Direction - Speed
Wednesday Evening W 10 - 20
Wednesday Night WSW 5 - 15
Thursday Morning WSW 10 - 20
Thursday Afternoon WSW 20 - 30

Extended Weather Synopsis for Thursday night through Thursday

Friday night and Saturday should feature markedly cooler conditions and a brief return to winter-like weather. The upper low sliding down the BC coastline will begin to impact northern Washington with increasing light rain and snow with lowering snow levels with moderate winds increasing in many areas. On Saturday, the broad upper trough should remain over the US-Canadian border region with stronger winds and heavier (but still generally light) precipitation aimed at the central and southern Washington Cascades. Snow may be possible at Snoqualmie pass level on Saturday morning, but this should not be a significant event. Expect very lighter snow shower activity over the North Cascades. On Saturday night and Sunday, the energy shifts further east with the trough weakening and afternoon rain and snow shower activity diminishing in the Cascades with temperatures moderating to near normal for this time of year.

Extended Snow/Freezing Levels

Mt. Baker Snoqualmie Pass Mt. Hood Easterly Flow *
Friday Night Snow Level 3000' - 4000' 3000' - 5000' 5000' - 6000'
Saturday Snow Level 2500' - 3500' 2500' - 3500' 3500' - 4500'
Saturday Night Freezing Level 2500' - 4500' 2500' - 4500' 3000' - 5000'
Mt. Baker Elevation
Friday Night Snow Level
3000' - 4000'
Saturday Snow Level
2500' - 3500'
Saturday Night Freezing Level
2500' - 4500'
Sunday Freezing Level
3000' - 5000'
Snoqualmie Pass Elevation
Friday Night Snow Level
3000' - 5000'
Saturday Snow Level
2500' - 3500'
Saturday Night Freezing Level
2500' - 4500'
Sunday Freezing Level
3000' - 5000'
Mt. Hood Elevation
Friday Night Snow Level
5000' - 6000'
Saturday Snow Level
3500' - 4500'
Saturday Night Freezing Level
3000' - 5000'
Sunday Freezing Level
3500' - 5500'

* 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 Apr 23, 2019

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