Issued: 3:11 PM PDT Monday, April 15, 2019
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 Sunday

A weak low pressure system digging off the Oregon coast will continue to spin clouds and light showers northward overnight. While high and mid clouds should reach all areas, measurable precipitation is only expected as far north as the south Washington Cascades.  Tuesday should begin with partly sunny skies but light warm frontal moisture extending from a low pressure system in the Gulf of Alaska should bring increasing clouds along with very light rain and snow to the west slopes of the Cascades, the Olympics and Mt. Hood. 

Precipitation will increase slightly Tuesday night as the frontal band stalls offshore. Upper level ridging over the west coast will begin to shift the frontal band northward on Wednesday for a drying and warming trend. A potential clearing trend is most likely for the south Washington Cascades and Mt. Hood Wednesday afternoon. 

Weather Forecast

Hurricane Ridge
Monday Night Cloudy.
Mt. Baker
Monday Night Mostly cloudy.
Washington Pass and Leavenworth
Monday Night Mostly cloudy.
Stevens and Snoqualmie Pass
Monday Night Mostly cloudy.
Mt. Rainier, Crystal and White Pass
Monday Night Cloudy with a chance of light rain and snow showers.
Mt. Hood
Monday Night Cloudy with light rain and snow showers.

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

Monday Night Sunday Sunday Night Sunday
4 pm - 4 am 4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge 0 LT 0.10 0 LT 0.10
Mt Baker Ski Area 0 LT 0.10 LT 0.25 LT 0.25
Washington Pass 0 0 LT 0.10 0
Leavenworth 0 0 0 0
Stevens Pass 0 LT 0.10 LT 0.25 LT 0.10
Snoqualmie Pass 0 LT 0.10 LT 0.25 LT 0.10
Mission Ridge 0 0 0 0
Crystal Mt LT 0.10 LT 0.10 LT 0.10 LT 0.10
Paradise LT 0.10 LT 0.10 LT 0.25 LT 0.25
White Pass LT 0.10 LT 0.10 LT 0.10 LT 0.10
Mt Hood Meadows LT 0.25 LT 0.10 LT 0.10 0
LT 0.25 LT 0.25 LT 0.10 0
Hurricane Ridge Precipitation Forecast
Monday Night 0
Sunday LT 0.10
Sunday Night 0
Sunday LT 0.10
Mt Baker Ski Area Precipitation Forecast
Monday Night 0
Sunday LT 0.10
Sunday Night LT 0.25
Sunday LT 0.25
Washington Pass Precipitation Forecast
Monday Night 0
Sunday 0
Sunday Night LT 0.10
Sunday 0
Leavenworth Precipitation Forecast
Monday Night 0
Sunday 0
Sunday Night 0
Sunday 0
Stevens Pass Precipitation Forecast
Monday Night 0
Sunday LT 0.10
Sunday Night LT 0.25
Sunday LT 0.10
Snoqualmie Pass Precipitation Forecast
Monday Night 0
Sunday LT 0.10
Sunday Night LT 0.25
Sunday LT 0.10
Mission Ridge Precipitation Forecast
Monday Night 0
Sunday 0
Sunday Night 0
Sunday 0
Crystal Mt Precipitation Forecast
Monday Night LT 0.10
Sunday LT 0.10
Sunday Night LT 0.10
Sunday LT 0.10
Paradise Precipitation Forecast
Monday Night LT 0.10
Sunday LT 0.10
Sunday Night LT 0.25
Sunday LT 0.25
White Pass Precipitation Forecast
Monday Night LT 0.10
Sunday LT 0.10
Sunday Night LT 0.10
Sunday LT 0.10
Mt Hood Meadows Precipitation Forecast
Monday Night LT 0.25
Sunday LT 0.10
Sunday Night LT 0.10
Sunday 0
Timberline Precipitation Forecast
Monday Night LT 0.25
Sunday LT 0.25
Sunday Night LT 0.10
Sunday 0

Free Winds at 5000' (mph)

Hurricane Ridge Mt. Baker Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Monday Evening E 0 - 10 VAR 0 - 10 E 5 - 15 E 0 - 10 VAR 0 - 10
Monday Night VAR 0 - 10 VAR 0 - 10 VAR 0 - 10 SW 0 - 10 WSW 0 - 10
Tuesday Morning S 0 - 10 S 0 - 10 SW 0 - 10 SW 0 - 10 SW 5 - 15
Hurricane Ridge Elevation
Monday Evening E 0 - 10
Monday Night VAR 0 - 10
Tuesday Morning S 0 - 10
Tuesday Afternoon SW 5 - 15
Mt. Baker Elevation
Monday Evening VAR 0 - 10
Monday Night VAR 0 - 10
Tuesday Morning S 0 - 10
Tuesday Afternoon SW 10 - 20
Stevens and Snoqualmie Pass Elevation
Monday Evening E 5 - 15
Monday Night VAR 0 - 10
Tuesday Morning SW 0 - 10
Tuesday Afternoon W 10 - 20
Mt. Rainier Elevation
Monday Evening E 0 - 10
Monday Night SW 0 - 10
Tuesday Morning SW 0 - 10
Tuesday Afternoon SW 5 - 15
Mt. Hood Elevation
Monday Evening VAR 0 - 10
Monday Night WSW 0 - 10
Tuesday Morning SW 5 - 15
Tuesday Afternoon W 15 - 25
Hurricane Ridge Direction - Speed
Monday Evening E 0 - 10
Monday Night VAR 0 - 10
Tuesday Morning S 0 - 10
Tuesday Afternoon SW 5 - 15
Mt. Baker Direction - Speed
Monday Evening VAR 0 - 10
Monday Night VAR 0 - 10
Tuesday Morning S 0 - 10
Tuesday Afternoon SW 10 - 20
Stevens and Snoqualmie Pass Direction - Speed
Monday Evening E 5 - 15
Monday Night VAR 0 - 10
Tuesday Morning SW 0 - 10
Tuesday Afternoon W 10 - 20
Mt. Rainier Direction - Speed
Monday Evening E 0 - 10
Monday Night SW 0 - 10
Tuesday Morning SW 0 - 10
Tuesday Afternoon SW 5 - 15
Mt. Hood Direction - Speed
Monday Evening VAR 0 - 10
Monday Night WSW 0 - 10
Tuesday Morning SW 5 - 15
Tuesday Afternoon W 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
Monday Evening SE 0 - 10 SE 0 - 10 S 5 - 15 S 10 - 20 SW 10 - 20
Monday Night SW 0 - 10 VAR 0 - 10 WSW 10 - 20 WSW 10 - 20 WSW 10 - 20
Tuesday Morning SW 5 - 15 SW 0 - 10 W 10 - 20 W 10 - 20 W 5 - 15
Mt. Baker Direction - Speed
Monday Evening SE 0 - 10
Monday Night SW 0 - 10
Tuesday Morning SW 5 - 15
Tuesday Afternoon SW 10 - 20
Washington Pass Direction - Speed
Monday Evening SE 0 - 10
Monday Night VAR 0 - 10
Tuesday Morning SW 0 - 10
Tuesday Afternoon SW 10 - 20
Stevens and Snoqualmie Pass Direction - Speed
Monday Evening S 5 - 15
Monday Night WSW 10 - 20
Tuesday Morning W 10 - 20
Tuesday Afternoon W 20 - 30
Mt. Rainier Direction - Speed
Monday Evening S 10 - 20
Monday Night WSW 10 - 20
Tuesday Morning W 10 - 20
Tuesday Afternoon W 15 - 25
Mt. Hood Direction - Speed
Monday Evening SW 10 - 20
Monday Night WSW 10 - 20
Tuesday Morning W 5 - 15
Tuesday Afternoon W 15 - 25

Extended Weather Synopsis for Sunday night through Sunday

A new wave developing along the stalled frontal boundary will approach the area Wednesday night as the upper level ridge begins to flatten and shift inland. This should open the door to increased amounts of moisture aimed primarily at the north Cascades through Thursday. Precipitation amounts should taper from north to south with little to no precipitation expected for Mt. Hood over this period. Snow/freezing levels should remain mild through Thursday night when a stronger frontal system blows through the area with the potential for significant winds, precipitation and eventual cooling headed into Friday. 

Extended Snow/Freezing Levels

Mt. Baker Snoqualmie Pass Mt. Hood Easterly Flow *
Wednesday Night Snow Level 5500' - 7000' 6500' - 7500' 8000' - 9000'
Thursday Snow Level 6500' - 7500' 7500' - 8500' 8500' - 9500'
Thursday Night Snow Level 7000' - 8000' 8000' - 9000' 8500' - 9500'
Mt. Baker Elevation
Wednesday Night Snow Level
5500' - 7000'
Thursday Snow Level
6500' - 7500'
Thursday Night Snow Level
7000' - 8000'
Friday Snow Level
5000' - 6000'
Snoqualmie Pass Elevation
Wednesday Night Snow Level
6500' - 7500'
Thursday Snow Level
7500' - 8500'
Thursday Night Snow Level
8000' - 9000'
Friday Snow Level
5500' - 6500'
Mt. Hood Elevation
Wednesday Night Snow Level
8000' - 9000'
Thursday Snow Level
8500' - 9500'
Thursday Night Snow Level
8500' - 9500'
Friday Snow Level
6500' - 7500'

* 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 14, 2019

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