Issued: 2:12 PM PST Sunday, February 14, 2021
by Robert Hahn

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

Weather Synopsis

An active weather pattern continues. Several shortwave features are rotating northward around an offshore surface low. The first moved through the area on Sunday with lingering snowfall into Sunday evening. The second will approaches Sunday night bringing increasing snowfall across the region, but with the heaviest snowfall focused on Mt. Hood through the southern Washington Cascades. The surface low reaches the Washington Coast on Monday afternoon. Heavy snowfall increasing in the southern parts of the forecast area but extends north to the mountain loop area. Sunday night and Monday we expect 1-2 ft of snow for Mt. Hood, Paradise, Snoqualmie, Stevens, and Mt. Baker with higher snow ratios and lower snow totals further north. E flow through the passes peaks Sunday night and switches weserly Monday afternoon, allowing temperatures to rise on the east slopes of the Cascades.


Flow turns NWerly behind the low, but the moist flow continues Monday night and Tuesday. Snoqualmie Pass, Paradise, and Mt. Hood can expect upwards of an additional foot of snow Monday night and Tuesday.

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
Sunday Night Periods of light snow.
Monday Light to occasionally moderate snow.
Sunday Night Light snow.
Monday Moderate snow, heaviest in the afternoon.
Sunday Night Light to occasionally moderate snow.
Monday Moderate snow becoming heavy in the afternoon.
Sunday Night Heavy snow at Paradise, moderate snow at White Pass, and light to moderate snow at Crystal.
Monday Increasing snow: Heavy at Paradise and White Pass; light to moderate at Crystal.
Sunday Night Light to moderate snow. Light to moderate E wind at the Pass.
Monday Moderate snow becoming heavy in the afternoon. Light E winds switching to W by afternoon.
Sunday Night Light snow becoming moderate. Moderate E wind at the Pass.
Monday Increasing heavy snow. Light E winds switching to light to moderate W by afternoon.
Sunday Night Cloudy with periods of light snow.
Monday Increasing light to occasionally moderate snow.
Sunday Night Increasing light to occasionally moderate snow.
Monday Moderate snow, heavy at times in the afternoon.
Sunday Night Light snow becoming moderate.
Monday Increasing moderate snow, heavy at times in the afternoon.
Sunday Night Increasing heavy snow. Moderate to strong ridgeline winds.
Monday Heavy snow. Strong ridgeline winds, very strong at times in the afternoon.

Issued: 2:12 PM PST Sunday, February 14, 2021

Precipitation (in)

Sunday Night Monday Monday Night Tuesday
4 pm - 4 am 4 am - 4 pm 4 pm - 4 am 4 am - 4 pm
Hurricane Ridge LT 0.25 0.25 - 0.50 LT 0.25 LT 0.10
Mt Baker Ski Area 0.50 0.50 - 0.75 0.25 0.25 - 0.50
Mt. Loop - Barlow Pass 0.25 - 0.50 0.75 -1.00 0.25 - 0.50 0.25 - 0.50
Stevens Pass 0.50 0.75 0.25 - 0.50 0.25 - 0.50
Snoqualmie Pass 0.50 - 0.75 1.00 0.75 -1.00 0.50
Crystal Mt 0.25 0.25 0.50 0.25
Paradise 1.00 1.00 0.75 -1.00 0.25 - 0.50
White Pass 0.50 0.75 -1.00 0.50 - 0.75 0.25
Washington Pass LT 0.25 0.25 LT 0.25 LT 0.25
Mission Ridge LT 0.25 0.25 LT 0.10 0
Salmon la Sac - Gallagher Head 0.25 - 0.50 0.50 - 0.75 0.25 LT 0.25
Tieton River - Darland Mt. 0.25 - 0.50 0.50 - 0.75 0.25 - 0.50 LT 0.25
Mt Hood Meadows 0.75 0.75 -1.00 1.00 0.50
Timberline 0.75 -1.00 0.75 -1.00 1.00 0.50
Hurricane Ridge Precipitation (in)
Sunday Night LT 0.25
Monday 0.25 - 0.50
Monday Night LT 0.25
Tuesday LT 0.10
Mt Baker Ski Area Precipitation (in)
Sunday Night 0.50
Monday 0.50 - 0.75
Monday Night 0.25
Tuesday 0.25 - 0.50
Mt. Loop - Barlow Pass Precipitation (in)
Sunday Night 0.25 - 0.50
Monday 0.75 -1.00
Monday Night 0.25 - 0.50
Tuesday 0.25 - 0.50
Stevens Pass Precipitation (in)
Sunday Night 0.50
Monday 0.75
Monday Night 0.25 - 0.50
Tuesday 0.25 - 0.50
Snoqualmie Pass Precipitation (in)
Sunday Night 0.50 - 0.75
Monday 1.00
Monday Night 0.75 -1.00
Tuesday 0.50
Crystal Mt Precipitation (in)
Sunday Night 0.25
Monday 0.25
Monday Night 0.50
Tuesday 0.25
Paradise Precipitation (in)
Sunday Night 1.00
Monday 1.00
Monday Night 0.75 -1.00
Tuesday 0.25 - 0.50
White Pass Precipitation (in)
Sunday Night 0.50
Monday 0.75 -1.00
Monday Night 0.50 - 0.75
Tuesday 0.25
Washington Pass Precipitation (in)
Sunday Night LT 0.25
Monday 0.25
Monday Night LT 0.25
Tuesday LT 0.25
Mission Ridge Precipitation (in)
Sunday Night LT 0.25
Monday 0.25
Monday Night LT 0.10
Tuesday 0
Salmon la Sac - Gallagher Head Precipitation (in)
Sunday Night 0.25 - 0.50
Monday 0.50 - 0.75
Monday Night 0.25
Tuesday LT 0.25
Tieton River - Darland Mt. Precipitation (in)
Sunday Night 0.25 - 0.50
Monday 0.50 - 0.75
Monday Night 0.25 - 0.50
Tuesday LT 0.25
Mt Hood Meadows Precipitation (in)
Sunday Night 0.75
Monday 0.75 -1.00
Monday Night 1.00
Tuesday 0.50
Timberline Precipitation (in)
Sunday Night 0.75 -1.00
Monday 0.75 -1.00
Monday Night 1.00
Tuesday 0.50

Issued: 2:12 PM PST Sunday, February 14, 2021

Snow Level (ft)

Sunday Evening* Sunday Night* Monday Morning* Monday Afternoon* Monday Evening Monday Night Tuesday Morning Tuesday Afternoon
Olympics 2500' 3000' 3000' 3000' 2500' 2000' 2000' 2000'
West North 1000' 500' 500' 1500' 2000' 1500' 1500' 2000'
West Central 0 0 0 500' 2000' 2000' 2000' 2000'
West South 1000' 1000' 1500' 2500' 3000' 2500' 2000' 2000'
Stevens Pass 0 0 0 0 1500' 2000' 2000' 2500'
Snoqualmie Pass 0 0 0 500' 1500' 2000' 2000' 2000'
East North 0 0 0 500' 1000' 1000' 1000' 2500'
East Central 0 0 0 500' 1000' 1500' 2000' 2500'
East South 0 0 1000' 2500' 3000' 2500' 2500' 2500'
Mt. Hood 1000' 2000' 3500' 3500' 3000' 2500' 2000' 2500'
Olympics Elevation
Sunday Evening* 2500'
Sunday Night* 3000'
Monday Morning* 3000'
Monday Afternoon* 3000'
Monday Evening 2500'
Monday Night 2000'
Tuesday Morning 2000'
Tuesday Afternoon 2000'
West North Elevation
Sunday Evening* 1000'
Sunday Night* 500'
Monday Morning* 500'
Monday Afternoon* 1500'
Monday Evening 2000'
Monday Night 1500'
Tuesday Morning 1500'
Tuesday Afternoon 2000'
West Central Elevation
Sunday Evening* 0'
Sunday Night* 0'
Monday Morning* 0'
Monday Afternoon* 500'
Monday Evening 2000'
Monday Night 2000'
Tuesday Morning 2000'
Tuesday Afternoon 2000'
West South Elevation
Sunday Evening* 1000'
Sunday Night* 1000'
Monday Morning* 1500'
Monday Afternoon* 2500'
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 2000'
Tuesday Afternoon 2000'
Stevens Pass Elevation
Sunday Evening* 0'
Sunday Night* 0'
Monday Morning* 0'
Monday Afternoon* 0'
Monday Evening 1500'
Monday Night 2000'
Tuesday Morning 2000'
Tuesday Afternoon 2500'
Snoqualmie Pass Elevation
Sunday Evening* 0'
Sunday Night* 0'
Monday Morning* 0'
Monday Afternoon* 500'
Monday Evening 1500'
Monday Night 2000'
Tuesday Morning 2000'
Tuesday Afternoon 2000'
East North Elevation
Sunday Evening* 0'
Sunday Night* 0'
Monday Morning* 0'
Monday Afternoon* 500'
Monday Evening 1000'
Monday Night 1000'
Tuesday Morning 1000'
Tuesday Afternoon 2500'
East Central Elevation
Sunday Evening* 0'
Sunday Night* 0'
Monday Morning* 0'
Monday Afternoon* 500'
Monday Evening 1000'
Monday Night 1500'
Tuesday Morning 2000'
Tuesday Afternoon 2500'
East South Elevation
Sunday Evening* 0'
Sunday Night* 0'
Monday Morning* 1000'
Monday Afternoon* 2500'
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 2500'
Tuesday Afternoon 2500'
Mt. Hood Elevation
Sunday Evening* 1000'
Sunday Night* 2000'
Monday Morning* 3500'
Monday Afternoon* 3500'
Monday Evening 3000'
Monday Night 2500'
Tuesday Morning 2000'
Tuesday Afternoon 2500'

Issued: 2:12 PM PST Sunday, February 14, 2021

5000' Temperatures (°F)

Sunday Night Monday
Max / Min Max / Min
Olympics 29 / 26 30 / 26
West North 26 / 23 28 / 24
West Central 23 / 21 28 / 22
West South 29 / 27 30 / 27
Stevens Pass 16 / 14 29 / 17
Snoqualmie Pass 20 / 17 28 / 20
East North 11 / 9 26 / 11
East Central 16 / 14 29 / 18
East South 25 / 19 30 / 28
Mt. Hood 34 / 29 33 / 27
Olympics 5000' Temperature Forecast
(Max / Min)
Sunday Night 29 / 26
Monday 30 / 26
West North 5000' Temperature Forecast
(Max / Min)
Sunday Night 26 / 23
Monday 28 / 24
West Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 23 / 21
Monday 28 / 22
West South 5000' Temperature Forecast
(Max / Min)
Sunday Night 29 / 27
Monday 30 / 27
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 16 / 14
Monday 29 / 17
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Sunday Night 20 / 17
Monday 28 / 20
East North 5000' Temperature Forecast
(Max / Min)
Sunday Night 11 / 9
Monday 26 / 11
East Central 5000' Temperature Forecast
(Max / Min)
Sunday Night 16 / 14
Monday 29 / 18
East South 5000' Temperature Forecast
(Max / Min)
Sunday Night 25 / 19
Monday 30 / 28
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Sunday Night 34 / 29
Monday 33 / 27

Issued: 2:12 PM PST Sunday, February 14, 2021

Ridgeline Winds (mph)

Sunday Evening Sunday Night Monday Morning Monday Afternoon
Olympics SW 10-20 SSW 15-25 WSW 15-25 W 10-20
West North S 10-20 S 10-20 SSW 10-20 SW 5-15
West Central SSE 5-15 SSE 5-15 SSW 10-20 WSW 15-25
West South SW 10-20 SW 10-20 WSW 15-25 WSW 15-25
Stevens Pass SSE 5-15 SSE 5-15 SW 5-15 WSW 10-20
Snoqualmie Pass SE 5-15 SE 5-15 SW 10-20 W 15-25
East North S 5-15 S 5-15 S 5-15 WSW 10-20
East Central SW 5-15 SW 10-20 WSW 20-30 W 20-30
East South WSW 10-20 SW 10-20 WSW 15-25 WSW 15-25
Mt. Hood WSW 20-30 WSW 25-35 WSW 30-40 WSW 30-40
Olympics Ridgeline Winds (mph)
Sunday Evening SW 10-20
Sunday Night SSW 15-25
Monday Morning WSW 15-25
Monday Afternoon W 10-20
West North Ridgeline Winds (mph)
Sunday Evening S 10-20
Sunday Night S 10-20
Monday Morning SSW 10-20
Monday Afternoon SW 5-15
West Central Ridgeline Winds (mph)
Sunday Evening SSE 5-15
Sunday Night SSE 5-15
Monday Morning SSW 10-20
Monday Afternoon WSW 15-25
West South Ridgeline Winds (mph)
Sunday Evening SW 10-20
Sunday Night SW 10-20
Monday Morning WSW 15-25
Monday Afternoon WSW 15-25
Stevens Pass Ridgeline Winds (mph)
Sunday Evening SSE 5-15
Sunday Night SSE 5-15
Monday Morning SW 5-15
Monday Afternoon WSW 10-20
Snoqualmie Pass Ridgeline Winds (mph)
Sunday Evening SE 5-15
Sunday Night SE 5-15
Monday Morning SW 10-20
Monday Afternoon W 15-25
East North Ridgeline Winds (mph)
Sunday Evening S 5-15
Sunday Night S 5-15
Monday Morning S 5-15
Monday Afternoon WSW 10-20
East Central Ridgeline Winds (mph)
Sunday Evening SW 5-15
Sunday Night SW 10-20
Monday Morning WSW 20-30
Monday Afternoon W 20-30
East South Ridgeline Winds (mph)
Sunday Evening WSW 10-20
Sunday Night SW 10-20
Monday Morning WSW 15-25
Monday Afternoon WSW 15-25
Mt. Hood Ridgeline Winds (mph)
Sunday Evening WSW 20-30
Sunday Night WSW 25-35
Monday Morning WSW 30-40
Monday Afternoon WSW 30-40

Issued: 2:12 PM PST Sunday, February 14, 2021

Extended Weather Synopsis

Upper-level flow turns northwesterly as a ridge builds offshore Tuesday night. The last in a series of shortwaves maintains snow Tuesday night with higher resolution guidance showing strong convergence over the central Washington Cascades. Drier weather arrives a ridge of high pressure moves into the area Wednesday afternoon and night with mostly cloudy skies over the area. A frontal system arrives on Thursday with rain and snow and milder temperatures.

Extended Snow Level (ft)

Tuesday Night Wednesday Wednesday Night* Thursday *
West North 1000' 1000' 1000' 1500'
Snoqualmie Pass 1500' 1500' 1500' 1500'
Mt. Hood 2000' 2000' 2000' 3000'
West North Elevation
Tuesday Night 1000'
Wednesday 1000'
Wednesday Night* 1000'
Thursday * 1500'
Snoqualmie Pass Elevation
Tuesday Night 1500'
Wednesday 1500'
Wednesday Night* 1500'
Thursday * 1500'
Mt. Hood Elevation
Tuesday Night 2000'
Wednesday 2000'
Wednesday Night* 2000'
Thursday * 3000'

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

Previous forecast from Feb 14, 2021

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’.