Issued: 1:56 PM PST Monday, February 19, 2024
by Dallas Glass

Jump to: Weather Forecast I Precipitation I Snow Level I 5000' Temps I Ridgeline Winds I Extended Weather

Weather Synopsis

We've been stuck in a very similar weather pattern day in and day out since late last week. Things won't change over the next few days. 

Showers continue to lift from S to N this afternoon along both sides of the Cascade crest. They will make their way to the Canadian border this afternoon, with the last precipitation lingering near Darrington, Mt Baker, and WA Pass this evening. Drier air has already started to push into the Mt Hood area, with a few sun breaks this afternoon. As it spreads further north, most locations will see at least a few stars poking through the clouds. However, our next wave of moisture is hot on its heels. 

A low-pressure system off the Oregon coast will once again spin showers northward into the region. They should reach Mt Hood and the West/East South zones after midnight and spread north toward the I90 corridor during the morning. If this sounds familiar, it's because we've seen nearly the exact same pattern each of the last 3 days. The big difference this time is the position of the Low will cause winds to come from a more S-SW direction. While the storm will still favor the southern volcanoes, it should also impact areas along the Cascade Crest and mountain passes. 

Precipitation reaches the northern zones in the afternoon, and showers taper from S to N during the evening. The low pressure will slowly meander along the WA coast Tuesday night and Wednesday morning. The exact track of the low will make a big difference in how much precipitation falls. If it moves closer to shore, the mountains will receive higher totals than if it tracks further out to sea. 

 

Weather Forecast

Olympics
West North
West Central
West South
Stevens Pass
Snoqualmie Pass
East North
East Central
East South
Mt. Hood
Use dropdown to select your zone
Monday Night Partly to mostly cloudy, with clouds increasing toward dawn.
Tuesday Mostly cloudy with a few light showers.
Monday Night Cloudy with a few light showers possible in the evening. Then, some clearing. Winds turning S and becoming light to moderate.
Tuesday Becoming cloudy early in the morning. Occasional light showers. Light to moderate SSW winds.
Monday Night A few stray showers in the evening, then clearing. Clouds returning around dawn.
Tuesday Cloudy with occasional light showers. Light to moderate SW winds.
Monday Night Clouds thicken and lower overnight. A few showers possible mainly after midnight. Winds turning SW and becoming light to moderate.
Tuesday Cloudy with showers, mainly in the morning. A few sun breaks possible in the afternoon. Light to moderate SW winds.
Monday Night Mostly cloudy with a few flurries possible. Light E flow at pass level. Ridgeline winds turning SW overnight.
Tuesday Cloudy with light snow showers. Light E flow decreasing in the afternoon. Light SW ridgeline winds.
Monday Night Partly cloudy in the evening, then clouds thicken and lower. A few flurries possible. Light E flow at pass level. Ridgeline winds turning SW.
Tuesday Cloudy with occasional light showers. A few small sun breaks possible in the afternoon. Light E flow decreasing in the afternoon. Light SW ridgeline winds.
Monday Night Mostly cloudy with a few light showers possible.
Tuesday Cloudy with light showers mainly in the afternoon.
Monday Night Partly to mostly cloudy in the evening with a few isolated showers. Clouds increasing and lowering. Light to moderate SSW winds turning SW.
Tuesday Cloudy with light showers mainly in the morning. Sun breaks possible in the afternoon. SW winds becoming light to moderate.
Monday Night Partly cloudy in the evening. Clouds then thicken and lower. A few showers after midnight. Light to moderate SW winds.
Tuesday Cloudy with showers mainly in the morning. Sun breaks possible in the afternoon. SW winds increasing and becoming moderate.
Monday Night Clouds thicken and lower in the evening. Light showers overnight. Moderate SW winds.
Tuesday Cloudy with showers mainly in the morning. Sun breaks possible in the afternoon. Moderate to strong and gusty SW winds.

Issued: 1:56 PM PST Monday, February 19, 2024

Precipitation (in)

Monday Night Tuesday Tuesday Night Wednesday
4 pm - 4 am 4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge 0 LT 0.10 LT 0.25 LT 0.10
Mt Baker Ski Area LT 0.10 LT 0.25 0.25 0.25
Mt. Loop - Barlow Pass LT 0.10 LT 0.25 0.25 LT 0.25
Stevens Pass 0 LT 0.25 LT 0.10 LT 0.25
Snoqualmie Pass 0 LT 0.25 LT 0.10 LT 0.25
Crystal Mt LT 0.10 LT 0.25 LT 0.10 LT 0.25
Paradise LT 0.25 0.25 0.25 - 0.50 0.50
White Pass LT 0.10 LT 0.25 LT 0.10 LT 0.25
Washington Pass LT 0.10 LT 0.10 LT 0.10 LT 0.10
Mission Ridge LT 0.10 LT 0.10 LT 0.10 LT 0.10
Salmon la Sac - Gallagher Head LT 0.10 LT 0.10 LT 0.10 LT 0.25
Tieton River - Darland Mt. LT 0.10 LT 0.25 LT 0.10 LT 0.10
Mt Hood Meadows LT 0.25 LT 0.10 LT 0.25 0.25
Timberline LT 0.25 LT 0.10 LT 0.25 0.25
Hurricane Ridge Precipitation (in)
Monday Night 0
Tuesday LT 0.10
Tuesday Night LT 0.25
Wednesday LT 0.10
Mt Baker Ski Area Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.25
Tuesday Night 0.25
Wednesday 0.25
Mt. Loop - Barlow Pass Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.25
Tuesday Night 0.25
Wednesday LT 0.25
Stevens Pass Precipitation (in)
Monday Night 0
Tuesday LT 0.25
Tuesday Night LT 0.10
Wednesday LT 0.25
Snoqualmie Pass Precipitation (in)
Monday Night 0
Tuesday LT 0.25
Tuesday Night LT 0.10
Wednesday LT 0.25
Crystal Mt Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.25
Tuesday Night LT 0.10
Wednesday LT 0.25
Paradise Precipitation (in)
Monday Night LT 0.25
Tuesday 0.25
Tuesday Night 0.25 - 0.50
Wednesday 0.50
White Pass Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.25
Tuesday Night LT 0.10
Wednesday LT 0.25
Washington Pass Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.10
Mission Ridge Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.10
Salmon la Sac - Gallagher Head Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.10
Tuesday Night LT 0.10
Wednesday LT 0.25
Tieton River - Darland Mt. Precipitation (in)
Monday Night LT 0.10
Tuesday LT 0.25
Tuesday Night LT 0.10
Wednesday LT 0.10
Mt Hood Meadows Precipitation (in)
Monday Night LT 0.25
Tuesday LT 0.10
Tuesday Night LT 0.25
Wednesday 0.25
Timberline Precipitation (in)
Monday Night LT 0.25
Tuesday LT 0.10
Tuesday Night LT 0.25
Wednesday 0.25

Issued: 1:56 PM PST Monday, February 19, 2024

Snow Level (ft)

Monday Evening* Monday Night* Tuesday Morning* Tuesday Afternoon Tuesday Evening* Tuesday Night* Wednesday Morning* Wednesday Afternoon
Olympics 4500' 4000' 4500' 4500' 4000' 4000' 4000' 4000'
West North 5000' 4500' 4500' 5000' 4000' 3500' 3500' 4500'
West Central 5000' 4500' 4500' 4500' 4000' 3500' 3500' 4500'
West South 4000' 3500' 3500' 5000' 4000' 3000' 3000' 4500'
Stevens Pass 3500' 3000' 2500' 4000' 4000' 3000' 2500' 4000'
Snoqualmie Pass 3500' 3000' 2500' 4000' 4000' 3000' 2500' 4000'
East North 2500' 2000' 2000' 3500' 3500' 3000' 2500' 3500'
East Central 3000' 2500' 2500' 4000' 4000' 3000' 2500' 4000'
East South 3500' 3000' 3500' 4500' 4000' 3000' 2500' 4500'
Mt. Hood 4500' 4000' 4500' 5000' 4500' 4000' 4000' 4500'
Olympics Elevation
Monday Evening* 4500'
Monday Night* 4000'
Tuesday Morning* 4500'
Tuesday Afternoon 4500'
Tuesday Evening* 4000'
Tuesday Night* 4000'
Wednesday Morning* 4000'
Wednesday Afternoon 4000'
West North Elevation
Monday Evening* 5000'
Monday Night* 4500'
Tuesday Morning* 4500'
Tuesday Afternoon 5000'
Tuesday Evening* 4000'
Tuesday Night* 3500'
Wednesday Morning* 3500'
Wednesday Afternoon 4500'
West Central Elevation
Monday Evening* 5000'
Monday Night* 4500'
Tuesday Morning* 4500'
Tuesday Afternoon 4500'
Tuesday Evening* 4000'
Tuesday Night* 3500'
Wednesday Morning* 3500'
Wednesday Afternoon 4500'
West South Elevation
Monday Evening* 4000'
Monday Night* 3500'
Tuesday Morning* 3500'
Tuesday Afternoon 5000'
Tuesday Evening* 4000'
Tuesday Night* 3000'
Wednesday Morning* 3000'
Wednesday Afternoon 4500'
Stevens Pass Elevation
Monday Evening* 3500'
Monday Night* 3000'
Tuesday Morning* 2500'
Tuesday Afternoon 4000'
Tuesday Evening* 4000'
Tuesday Night* 3000'
Wednesday Morning* 2500'
Wednesday Afternoon 4000'
Snoqualmie Pass Elevation
Monday Evening* 3500'
Monday Night* 3000'
Tuesday Morning* 2500'
Tuesday Afternoon 4000'
Tuesday Evening* 4000'
Tuesday Night* 3000'
Wednesday Morning* 2500'
Wednesday Afternoon 4000'
East North Elevation
Monday Evening* 2500'
Monday Night* 2000'
Tuesday Morning* 2000'
Tuesday Afternoon 3500'
Tuesday Evening* 3500'
Tuesday Night* 3000'
Wednesday Morning* 2500'
Wednesday Afternoon 3500'
East Central Elevation
Monday Evening* 3000'
Monday Night* 2500'
Tuesday Morning* 2500'
Tuesday Afternoon 4000'
Tuesday Evening* 4000'
Tuesday Night* 3000'
Wednesday Morning* 2500'
Wednesday Afternoon 4000'
East South Elevation
Monday Evening* 3500'
Monday Night* 3000'
Tuesday Morning* 3500'
Tuesday Afternoon 4500'
Tuesday Evening* 4000'
Tuesday Night* 3000'
Wednesday Morning* 2500'
Wednesday Afternoon 4500'
Mt. Hood Elevation
Monday Evening* 4500'
Monday Night* 4000'
Tuesday Morning* 4500'
Tuesday Afternoon 5000'
Tuesday Evening* 4500'
Tuesday Night* 4000'
Wednesday Morning* 4000'
Wednesday Afternoon 4500'

Issued: 1:56 PM PST Monday, February 19, 2024

5000' Temperatures (°F)

Monday Night Tuesday
Max / Min Max / Min
Olympics 35 / 30 35 / 31
West North 36 / 30 36 / 31
West Central 35 / 29 34 / 29
West South 32 / 28 33 / 28
Stevens Pass 30 / 26 32 / 27
Snoqualmie Pass 30 / 27 33 / 28
East North 29 / 24 31 / 25
East Central 30 / 26 32 / 26
East South 31 / 27 34 / 28
Mt. Hood 32 / 28 34 / 28
Olympics 5000' Temperature Forecast
(Max / Min)
Monday Night 35 / 30
Tuesday 35 / 31
West North 5000' Temperature Forecast
(Max / Min)
Monday Night 36 / 30
Tuesday 36 / 31
West Central 5000' Temperature Forecast
(Max / Min)
Monday Night 35 / 29
Tuesday 34 / 29
West South 5000' Temperature Forecast
(Max / Min)
Monday Night 32 / 28
Tuesday 33 / 28
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Monday Night 30 / 26
Tuesday 32 / 27
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Monday Night 30 / 27
Tuesday 33 / 28
East North 5000' Temperature Forecast
(Max / Min)
Monday Night 29 / 24
Tuesday 31 / 25
East Central 5000' Temperature Forecast
(Max / Min)
Monday Night 30 / 26
Tuesday 32 / 26
East South 5000' Temperature Forecast
(Max / Min)
Monday Night 31 / 27
Tuesday 34 / 28
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Monday Night 32 / 28
Tuesday 34 / 28

Issued: 1:56 PM PST Monday, February 19, 2024

Ridgeline Winds (mph)

Monday Evening Monday Night Tuesday Morning Tuesday Afternoon
Olympics S 0-10 S 5-15 SW 5-15 SW 5-15
West North SE 5-15 S 10-20 SSW 10-20 SSW 10-20
West Central SSE 5-15 S 5-15 SW 10-20 SW 10-20
West South S 5-15 SW 10-20 SW 10-20 SW 10-20
Stevens Pass SSE 5-15 SW 5-15 SW 5-15 SW 5-15
Snoqualmie Pass SSE 5-15 SW 5-15 SW 5-15 SW 5-15
East North S 5-15 SW 5-15 SW 5-15 SW 5-15
East Central SSW 10-20 SW 10-20 SW 5-15 SW 10-20
East South SW 10-20 SW 10-20 SW 10-20 SW 15-25
Mt. Hood SW 15-25 SW 15-25 SW 20-30 SW 20-30
Olympics Ridgeline Winds (mph)
Monday Evening S 0-10
Monday Night S 5-15
Tuesday Morning SW 5-15
Tuesday Afternoon SW 5-15
West North Ridgeline Winds (mph)
Monday Evening SE 5-15
Monday Night S 10-20
Tuesday Morning SSW 10-20
Tuesday Afternoon SSW 10-20
West Central Ridgeline Winds (mph)
Monday Evening SSE 5-15
Monday Night S 5-15
Tuesday Morning SW 10-20
Tuesday Afternoon SW 10-20
West South Ridgeline Winds (mph)
Monday Evening S 5-15
Monday Night SW 10-20
Tuesday Morning SW 10-20
Tuesday Afternoon SW 10-20
Stevens Pass Ridgeline Winds (mph)
Monday Evening SSE 5-15
Monday Night SW 5-15
Tuesday Morning SW 5-15
Tuesday Afternoon SW 5-15
Snoqualmie Pass Ridgeline Winds (mph)
Monday Evening SSE 5-15
Monday Night SW 5-15
Tuesday Morning SW 5-15
Tuesday Afternoon SW 5-15
East North Ridgeline Winds (mph)
Monday Evening S 5-15
Monday Night SW 5-15
Tuesday Morning SW 5-15
Tuesday Afternoon SW 5-15
East Central Ridgeline Winds (mph)
Monday Evening SSW 10-20
Monday Night SW 10-20
Tuesday Morning SW 5-15
Tuesday Afternoon SW 10-20
East South Ridgeline Winds (mph)
Monday Evening SW 10-20
Monday Night SW 10-20
Tuesday Morning SW 10-20
Tuesday Afternoon SW 15-25
Mt. Hood Ridgeline Winds (mph)
Monday Evening SW 15-25
Monday Night SW 15-25
Tuesday Morning SW 20-30
Tuesday Afternoon SW 20-30

Issued: 1:56 PM PST Monday, February 19, 2024

Extended Weather Synopsis

The low pressure deteriorates Wednesday night into an open trough feature. This won't result in any significant precipitation, but it will also keep us from fully drying out. Mostly cloudy skies and a few scattered showers will continue mainly along the Olympics and west slopes of the Cascades. A much more organized cut-off low passing well to our south will absorb what's left of our fizzling moisture on Thursday. This looks like it sets up a Rex Block pattern that will keep storms well to our north. While not the exact pattern change we may want, there should be plenty of sunshine and dry weather to wind up the week. 

Extended Snow Level (ft)

Wednesday Night Thursday * Thursday Night* Friday *
West North 4000' 4000' 3000' 4500'
Snoqualmie Pass 3500' 3500' 2500' 4500'
Mt. Hood 4000' 4500' 4500' 5500'
West North Elevation
Wednesday Night 4000'
Thursday * 4000'
Thursday Night* 3000'
Friday * 4500'
Snoqualmie Pass Elevation
Wednesday Night 3500'
Thursday * 3500'
Thursday Night* 2500'
Friday * 4500'
Mt. Hood Elevation
Wednesday Night 4000'
Thursday * 4500'
Thursday Night* 4500'
Friday * 5500'

Jump to: Weather Forecast I Precipitation I Snow Level I 5000' Temps I Ridgeline Winds I Extended Weather

Previous forecast from Feb 19, 2024

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.

The 5000’ temperature forecast does not imply a trend over the 12 hr period and only represents the max and min temperatures within a 12 hr period in the zone. The 6-hr snow level forecast, the forecast discussion, and weather forecast sections may add detail regarding temperature trends.

The snow level forecast represents the general snow level over a 6 hr time period. Freezing levels are forecast when precipitation is not expected.

*Easterly or offshore flow is highlighted with an asterisk when we expect relatively cool east winds in the major Cascade Passes. Easterly flow will often lead to temperature inversions and is a key variable for forecasting precipitation type in the Cascade Passes. Strong easterly flow events can affect terrain on a more regional scale.

Ridgeline winds are the average wind speed and direction over a 6 hr time period.

The wind forecast represents an elevation range instead of a single elevation slice. The elevation range overlaps with the near and above treeline elevation bands in the avalanche forecast and differs per zone.

Wind direction indicates the direction the wind originates or comes from on the 16-point compass rose.

Water Equivalent (WE) is the liquid water equivalent of all precipitation types; rain, snow, ice pellets, etc., forecast to the hundredth of an inch at specific locations. To use WE as a proxy for snowfall amounts, start with a snow to water ratio of 10:1 (10 inches of snow = 1 inch WE). Temperatures at or near freezing will generally have a lower ratio (heavy wet snow) and very cold temperatures can have a much higher ratio (dry fluffy snow).

The label LT, is shorthand for ‘less than’.