Issued: 1:52 PM PDT Sunday, April 5, 2020
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 Sunday night through Friday

A closed upper level low will continue to drop south along the California coast tonight as a longwave trough remains over our region. Cool temperatures, mostly cloudy skies and isolated mountain showers will continue through the evening.

The main instability associated with the upper level trough will shift east to the Inland NW on Monday while onshore westerly flow increases during the day. There should be abundant low-level clouds along the west slopes of the Cascades, Olympics, and Mt. Hood Monday morning. All areas should see mostly sunny but still seasonally cool temperatures in the afternoon. Look for westerly winds to become moderate near the Passes and along the east slopes of the Cascades in the afternoon and evening hours. The best chance for an afternoon shower will be across the northern Cascades closer to higher terrain in the Pasatyen Wilderness. Tuesday looks like a near repeat of Monday. The Mt. Hood area will see somewhat higher freezing levels than areas further north over the short term. 

Weather Forecast

Hurricane Ridge
Sunday Night Mostly cloudy. Isolated rain and snow showers in the evening.
Mt. Baker
Sunday Night Mostly cloudy. Isolated rain and snow showers in the evening.
Washington Pass and Leavenworth
Sunday Night Mostly cloudy. Isolated rain and snow showers in the evening near Washington Pass.
Stevens and Snoqualmie Pass
Sunday Night Mostly cloudy. Isolated rain and snow showers in the evening. Pass level winds light and variable.
Mt. Rainier, Crystal and White Pass
Sunday Night Mostly cloudy. Isolated rain and snow showers in the evening.
Mt. Hood
Sunday Night Mostly cloudy. Isolated rain and snow showers in the evening.

Snow/Freezing Level (ft)

Hurricane Ridge Mt. Baker Washington Pass Leavenworth Stevens Pass Snoqualmie Pass Mt. Rainier, Crystal & White Pass Mt. Hood
Sunday Evening Snow Level 4000' 4000' 4000' 5000' 4500' 4500' 5000' 5000'
Sunday Night Freezing Level 3500' 3500' 2000' 4000' 4000' 4000' 4000' 6500'
Monday Morning Freezing Level 4500' 4500' 4000' 5000' 5000' 4500' 5000' 6500'
Monday Afternoon Freezing Level 5500' 5000' 5500' 6000' 5000' 5500' 6000' 6500'
Monday Evening Freezing Level 4500' 4500' 4500' 5000' 4000' 4500' 5000' 6500'
Monday Night Freezing Level 3500' 2500' 2500' 4000' 2500' 2500' 3500' 7000'
Tuesday Morning Freezing Level 4000' 4000' 4500' 5000' 4000' 4500' 4500' 7500'
Hurricane Ridge Elevation
Sunday Evening Snow Level
4000'
Sunday Night Freezing Level
3500'
Monday Morning Freezing Level
4500'
Monday Afternoon Freezing Level
5500'
Monday Evening Freezing Level
4500'
Monday Night Freezing Level
3500'
Tuesday Morning Freezing Level
4000'
Tuesday Afternoon Freezing Level
5000'
Mt. Baker Elevation
Sunday Evening Snow Level
4000'
Sunday Night Freezing Level
3500'
Monday Morning Freezing Level
4500'
Monday Afternoon Freezing Level
5000'
Monday Evening Freezing Level
4500'
Monday Night Freezing Level
2500'
Tuesday Morning Freezing Level
4000'
Tuesday Afternoon Freezing Level
5000'
Washington Pass Elevation
Sunday Evening Snow Level
4000'
Sunday Night Freezing Level
2000'
Monday Morning Freezing Level
4000'
Monday Afternoon Freezing Level
5500'
Monday Evening Freezing Level
4500'
Monday Night Freezing Level
2500'
Tuesday Morning Freezing Level
4500'
Tuesday Afternoon Freezing Level
5500'
Leavenworth Elevation
Sunday Evening Snow Level
5000'
Sunday Night Freezing Level
4000'
Monday Morning Freezing Level
5000'
Monday Afternoon Freezing Level
6000'
Monday Evening Freezing Level
5000'
Monday Night Freezing Level
4000'
Tuesday Morning Freezing Level
5000'
Tuesday Afternoon Freezing Level
6000'
Stevens Pass Elevation
Sunday Evening Snow Level
4500'
Sunday Night Freezing Level
4000'
Monday Morning Freezing Level
5000'
Monday Afternoon Freezing Level
5000'
Monday Evening Freezing Level
4000'
Monday Night Freezing Level
2500'
Tuesday Morning Freezing Level
4000'
Tuesday Afternoon Freezing Level
5000'
Snoqualmie Pass Elevation
Sunday Evening Snow Level
4500'
Sunday Night Freezing Level
4000'
Monday Morning Freezing Level
4500'
Monday Afternoon Freezing Level
5500'
Monday Evening Freezing Level
4500'
Monday Night Freezing Level
2500'
Tuesday Morning Freezing Level
4500'
Tuesday Afternoon Freezing Level
5500'
Mt. Rainier & Crystal Elevation
Sunday Evening Snow Level
5000'
Sunday Night Freezing Level
4000'
Monday Morning Freezing Level
5000'
Monday Afternoon Freezing Level
6000'
Monday Evening Freezing Level
5000'
Monday Night Freezing Level
3500'
Tuesday Morning Freezing Level
4500'
Tuesday Afternoon Freezing Level
6000'
Mt. Hood Elevation
Sunday Evening Snow Level
5000'
Sunday Night Freezing Level
6500'
Monday Morning Freezing Level
6500'
Monday Afternoon Freezing Level
6500'
Monday Evening Freezing Level
6500'
Monday Night Freezing Level
7000'
Tuesday Morning Freezing Level
7500'
Tuesday Afternoon Freezing Level
8000'

* 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 Night Friday Friday Night Friday
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 LT 0.10 0 0 0
Leavenworth 0 0 0 0
Stevens Pass LT 0.10 0 0 0
Snoqualmie Pass LT 0.10 0 0 0
Mission Ridge LT 0.10 0 0 0
Crystal Mt LT 0.10 0 0 0
Paradise LT 0.10 0 0 0
White Pass LT 0.10 0 0 0
Mt Hood Meadows LT 0.10 0 0 0
LT 0.10 0 0 0
Hurricane Ridge Precipitation Forecast
Sunday Night LT 0.10
Friday 0
Friday Night 0
Friday 0
Mt Baker Ski Area Precipitation Forecast
Sunday Night LT 0.10
Friday 0
Friday Night 0
Friday 0
Washington Pass Precipitation Forecast
Sunday Night LT 0.10
Friday 0
Friday Night 0
Friday 0
Leavenworth Precipitation Forecast
Sunday Night 0
Friday 0
Friday Night 0
Friday 0
Stevens Pass Precipitation Forecast
Sunday Night LT 0.10
Friday 0
Friday Night 0
Friday 0
Snoqualmie Pass Precipitation Forecast
Sunday Night LT 0.10
Friday 0
Friday Night 0
Friday 0
Mission Ridge Precipitation Forecast
Sunday Night LT 0.10
Friday 0
Friday Night 0
Friday 0
Crystal Mt Precipitation Forecast
Sunday Night LT 0.10
Friday 0
Friday Night 0
Friday 0
Paradise Precipitation Forecast
Sunday Night LT 0.10
Friday 0
Friday Night 0
Friday 0
White Pass Precipitation Forecast
Sunday Night LT 0.10
Friday 0
Friday Night 0
Friday 0
Mt Hood Meadows Precipitation Forecast
Sunday Night LT 0.10
Friday 0
Friday Night 0
Friday 0
Timberline Precipitation Forecast
Sunday Night LT 0.10
Friday 0
Friday Night 0
Friday 0

Free Winds at 5000' (mph)

Hurricane Ridge Mt. Baker Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Sunday Evening VAR 0 - 10 VAR 0 - 10 VAR 0 - 10 VAR 0 - 10 VAR 0 - 10
Sunday Night NW 0 - 10 NW 0 - 10 NW 0 - 10 NW 0 - 10 W 0 - 10
Monday Morning W 0 - 10 W 0 - 10 W 5 - 15 W 0 - 10 W 5 - 15
Hurricane Ridge Elevation
Sunday Evening VAR 0 - 10
Sunday Night NW 0 - 10
Monday Morning W 0 - 10
Monday Afternoon W 5 - 15
Mt. Baker Elevation
Sunday Evening VAR 0 - 10
Sunday Night NW 0 - 10
Monday Morning W 0 - 10
Monday Afternoon W 5 - 15
Stevens and Snoqualmie Pass Elevation
Sunday Evening VAR 0 - 10
Sunday Night NW 0 - 10
Monday Morning W 5 - 15
Monday Afternoon W 15 - 25
Mt. Rainier Elevation
Sunday Evening VAR 0 - 10
Sunday Night NW 0 - 10
Monday Morning W 0 - 10
Monday Afternoon W 5 - 15
Mt. Hood Elevation
Sunday Evening VAR 0 - 10
Sunday Night W 0 - 10
Monday Morning W 5 - 15
Monday Afternoon W 10 - 20
Hurricane Ridge Direction - Speed
Sunday Evening VAR 0 - 10
Sunday Night NW 0 - 10
Monday Morning W 0 - 10
Monday Afternoon W 5 - 15
Mt. Baker Direction - Speed
Sunday Evening VAR 0 - 10
Sunday Night NW 0 - 10
Monday Morning W 0 - 10
Monday Afternoon W 5 - 15
Stevens and Snoqualmie Pass Direction - Speed
Sunday Evening VAR 0 - 10
Sunday Night NW 0 - 10
Monday Morning W 5 - 15
Monday Afternoon W 15 - 25
Mt. Rainier Direction - Speed
Sunday Evening VAR 0 - 10
Sunday Night NW 0 - 10
Monday Morning W 0 - 10
Monday Afternoon W 5 - 15
Mt. Hood Direction - Speed
Sunday Evening VAR 0 - 10
Sunday Night W 0 - 10
Monday Morning W 5 - 15
Monday Afternoon W 10 - 20

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
Sunday Evening SW 5 - 15 SW 5 - 15 WSW 15 - 25 WSW 15 - 25 SW 5 - 15
Sunday Night W 5 - 15 W 10 - 20 W 15 - 25 W 10 - 20 W 5 - 15
Monday Morning NW 10 - 20 NW 10 - 20 NW 15 - 25 WNW 15 - 25 W 10 - 20
Mt. Baker Direction - Speed
Sunday Evening SW 5 - 15
Sunday Night W 5 - 15
Monday Morning NW 10 - 20
Monday Afternoon NW 15 - 25
Washington Pass Direction - Speed
Sunday Evening SW 5 - 15
Sunday Night W 10 - 20
Monday Morning NW 10 - 20
Monday Afternoon NW 10 - 20
Stevens and Snoqualmie Pass Direction - Speed
Sunday Evening WSW 15 - 25
Sunday Night W 15 - 25
Monday Morning NW 15 - 25
Monday Afternoon NW 25 - 35
Mt. Rainier Direction - Speed
Sunday Evening WSW 15 - 25
Sunday Night W 10 - 20
Monday Morning WNW 15 - 25
Monday Afternoon NW 15 - 25
Mt. Hood Direction - Speed
Sunday Evening SW 5 - 15
Sunday Night W 5 - 15
Monday Morning W 10 - 20
Monday Afternoon NW 15 - 25

Extended Weather Synopsis for Friday night through Friday

Flat upper level ridging will shift closer to the coast during the week, keeping the storm track at bay and well to our north. This will allow dry weather to continue with increasingly warmer temperatures day over day as the flow aloft stays out of the NW. Forecast models disagree just how much high cloud cover will waft over the northern half of Washington State during this time period. Look for warmer and sunnier conditions further south; freezing levels in the Mt. Hood area should top out above 10,000' by Thursday.  

Extended Snow/Freezing Levels

Mt. Baker Snoqualmie Pass Mt. Hood Easterly Flow *
Tuesday Night Freezing Level 3000' - 4000' 3500' - 4500' 7500' - 8500'
Wednesday Freezing Level 5500' - 6500' 6500' - 7500' 9000' - 10000'
Wednesday Night Freezing Level 5500' - 6500' 7500' - 8500' 8000' - 9000'
Mt. Baker Elevation
Tuesday Night Freezing Level
3000' - 4000'
Wednesday Freezing Level
5500' - 6500'
Wednesday Night Freezing Level
5500' - 6500'
Thursday Freezing Level
7000' - 8000'
Snoqualmie Pass Elevation
Tuesday Night Freezing Level
3500' - 4500'
Wednesday Freezing Level
6500' - 7500'
Wednesday Night Freezing Level
7500' - 8500'
Thursday Freezing Level
8000' - 9000'
Mt. Hood Elevation
Tuesday Night Freezing Level
7500' - 8500'
Wednesday Freezing Level
9000' - 10000'
Wednesday Night Freezing Level
8000' - 9000'
Thursday Freezing Level
10000' - 11000'

* 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 4, 2020

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