Issued: 7:10 AM PDT Sunday, April 14, 2024
by Robert Hahn

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

Weather Synopsis

Sunday will be the final day of an extended warm, dry stretch of weather. The upper-level weather pattern remains broadly similar, with westerly flow to our north and a closed low now moving inland over California. The associated cloud cover extending as far northward as southern Washington should dissipate around Mt Hood early this morning.

The main stories will be the warm temperatures on Sunday, increasing W winds, and a rapid cool-down heading into Monday. Most NWAC stations, including Camp Muir, were above freezing early Sunday morning. High temperatures on Sunday east of the Cascades should be warmer than Saturday. However, a strong surface high well offshore combined with a thermal low east of the Cascades will increase W winds to reasonably low elevations. This will initially begin to cool areas west of the Cascade Crest.

A broad trough eases southward over British Columbia Sunday night and Monday, rapidly cooling and increasing clouds. Most precipitation will hold off until the early morning hours on Monday. Expect periods of mostly very light rain and snow for the west slopes of the Cascades with 3000-4000 ft snow levels. Perhaps an inch or so of snow will accumulate in convergence bands. Meanwhile, moderate winds will buffet the east slopes of the Cascades and mountain gaps as pressure gradients increase to 10 MB across the Cascades by the afternoon.

7am Mountain Weather Forecasts will continue through Sunday, April 14th. Beginning Monday, April 15th, we will issue 230pm Mountain Weather Forecasts every day through Sunday, April 28th. 

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 Mostly sunny with increasing high clouds. High clouds lower and thicken late in the day.
Sunday Night Mostly cloudy.
Sunday Mostly sunny with increasing high clouds.
Sunday Night Mostly cloudy with lower clouds increasing in the early morning hours.
Sunday Mostly sunny with increasing high clouds.
Sunday Night Mostly cloudy with lower clouds increasing and a chance of very light rain or snow increasing in the early morning hours.
Sunday Mostly sunny with increasing high clouds.
Sunday Night Mostly cloudy with lower clouds increasing in the early morning hours.
Sunday Mostly sunny with increasing high clouds. Increasing light ridgeline and W wind at the Pass. Increasing light ridgeline and W wind at the Pass.
Sunday Night Mostly cloudy, with lower clouds increasing and a slight chance of very light rain or snow increasing in the early morning hours. There is an increasing light to moderate ridgeline and light W wind at the Pass.
Sunday Mostly sunny with increasing high clouds. Increasing moderate ridgeline and light to moderate W wind at the Pass.
Sunday Night Mostly cloudy with lower clouds increasing and a slight chance of very light rain or snow increasing in the early morning hours. Increasing moderate ridgeline and light to moderate W wind at the Pass.
Sunday Mostly sunny with increasing high clouds.
Sunday Night Partly cloudy. Moderate ridgeline winds.
Sunday Mostly sunny with increasing high clouds.
Sunday Night Partly cloudy. Moderate ridgeline winds.
Sunday Mostly sunny with increasing high clouds.
Sunday Night Partly cloudy. Moderate ridgeline winds.
Sunday Decreasing clouds early, then becoming mostly sunny with increasing high clouds in the afternoon.
Sunday Night Partly cloudy. Increasing moderate ridgeline winds.

Issued: 7:10 AM PDT Sunday, April 14, 2024

Precipitation (in)

Sunday Sunday Night Monday
5 am - 5 pm 5 pm - 5 am 5 am - 5 pm
Hurricane Ridge 0 0 LT 0.10
Mt Baker Ski Area 0 0 LT 0.10
Mt. Loop - Barlow Pass 0 LT 0.10 LT 0.10
Stevens Pass 0 0 LT 0.10
Snoqualmie Pass 0 0 LT 0.10
Crystal Mt 0 0 LT 0.10
Paradise 0 0 LT 0.10
White Pass 0 0 0
Washington Pass 0 0 0
Mission Ridge 0 0 0
Salmon la Sac - Gallagher Head 0 0 LT 0.10
Tieton River - Darland Mt. 0 0 0
Mt Hood Meadows 0 0 0
Timberline 0 0 0
Hurricane Ridge Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
Mt Baker Ski Area Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
Mt. Loop - Barlow Pass Precipitation (in)
Sunday 0
Sunday Night LT 0.10
Monday LT 0.10
Stevens Pass Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
Snoqualmie Pass Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
Crystal Mt Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
Paradise Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
White Pass Precipitation (in)
Sunday 0
Sunday Night 0
Monday 0
Washington Pass Precipitation (in)
Sunday 0
Sunday Night 0
Monday 0
Mission Ridge Precipitation (in)
Sunday 0
Sunday Night 0
Monday 0
Salmon la Sac - Gallagher Head Precipitation (in)
Sunday 0
Sunday Night 0
Monday LT 0.10
Tieton River - Darland Mt. Precipitation (in)
Sunday 0
Sunday Night 0
Monday 0
Mt Hood Meadows Precipitation (in)
Sunday 0
Sunday Night 0
Monday 0
Timberline Precipitation (in)
Sunday 0
Sunday Night 0
Monday 0

Issued: 7:10 AM PDT Sunday, April 14, 2024

Snow Level (ft)

Sunday Morning Sunday Afternoon Sunday Evening Sunday Night Monday Morning Monday Afternoon
Olympics 9500' 9000' 8000' 6500' 3000' 3000'
West North 8500' 8500' 7500' 5500' 3000' 3000'
West Central 10000' 9500' 7500' 6000' 3000' 3000'
West South 10000' 10000' 9000' 6500' 3000' 4000'
Stevens Pass 10000' 10000' 8500' 6500' 3000' 3500'
Snoqualmie Pass 10000' 10000' 8000' 6000' 3000' 3500'
East North 9000' 9500' 9000' 6500' 4500' 5500'
East Central 10500' 10500' 10000' 8000' 5000' 5500'
East South 10500' 10500' 10500' 8000' 5000' 5500'
Mt. Hood 10000' 10000' 9000' 7500' 4000' 3500'
Olympics Elevation
Sunday Morning 9500'
Sunday Afternoon 9000'
Sunday Evening 8000'
Sunday Night 6500'
Monday Morning 3000'
Monday Afternoon 3000'
West North Elevation
Sunday Morning 8500'
Sunday Afternoon 8500'
Sunday Evening 7500'
Sunday Night 5500'
Monday Morning 3000'
Monday Afternoon 3000'
West Central Elevation
Sunday Morning 10000'
Sunday Afternoon 9500'
Sunday Evening 7500'
Sunday Night 6000'
Monday Morning 3000'
Monday Afternoon 3000'
West South Elevation
Sunday Morning 10000'
Sunday Afternoon 10000'
Sunday Evening 9000'
Sunday Night 6500'
Monday Morning 3000'
Monday Afternoon 4000'
Stevens Pass Elevation
Sunday Morning 10000'
Sunday Afternoon 10000'
Sunday Evening 8500'
Sunday Night 6500'
Monday Morning 3000'
Monday Afternoon 3500'
Snoqualmie Pass Elevation
Sunday Morning 10000'
Sunday Afternoon 10000'
Sunday Evening 8000'
Sunday Night 6000'
Monday Morning 3000'
Monday Afternoon 3500'
East North Elevation
Sunday Morning 9000'
Sunday Afternoon 9500'
Sunday Evening 9000'
Sunday Night 6500'
Monday Morning 4500'
Monday Afternoon 5500'
East Central Elevation
Sunday Morning 10500'
Sunday Afternoon 10500'
Sunday Evening 10000'
Sunday Night 8000'
Monday Morning 5000'
Monday Afternoon 5500'
East South Elevation
Sunday Morning 10500'
Sunday Afternoon 10500'
Sunday Evening 10500'
Sunday Night 8000'
Monday Morning 5000'
Monday Afternoon 5500'
Mt. Hood Elevation
Sunday Morning 10000'
Sunday Afternoon 10000'
Sunday Evening 9000'
Sunday Night 7500'
Monday Morning 4000'
Monday Afternoon 3500'

Issued: 7:10 AM PDT Sunday, April 14, 2024

5000' Temperatures (°F)

Sunday Sunday Night
Max / Min Max / Min
Olympics 46 / 36 41 / 23
West North 44 / 34 39 / 25
West Central 44 / 36 38 / 24
West South 52 / 40 44 / 24
Stevens Pass 49 / 37 40 / 26
Snoqualmie Pass 44 / 38 39 / 26
East North 50 / 37 44 / 30
East Central 52 / 40 43 / 29
East South 57 / 43 46 / 29
Mt. Hood 54 / 42 45 / 29
Olympics 5000' Temperature Forecast
(Max / Min)
Sunday 46 / 36
Sunday Night 41 / 23
West North 5000' Temperature Forecast
(Max / Min)
Sunday 44 / 34
Sunday Night 39 / 25
West Central 5000' Temperature Forecast
(Max / Min)
Sunday 44 / 36
Sunday Night 38 / 24
West South 5000' Temperature Forecast
(Max / Min)
Sunday 52 / 40
Sunday Night 44 / 24
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Sunday 49 / 37
Sunday Night 40 / 26
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Sunday 44 / 38
Sunday Night 39 / 26
East North 5000' Temperature Forecast
(Max / Min)
Sunday 50 / 37
Sunday Night 44 / 30
East Central 5000' Temperature Forecast
(Max / Min)
Sunday 52 / 40
Sunday Night 43 / 29
East South 5000' Temperature Forecast
(Max / Min)
Sunday 57 / 43
Sunday Night 46 / 29
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Sunday 54 / 42
Sunday Night 45 / 29

Issued: 7:10 AM PDT Sunday, April 14, 2024

Ridgeline Winds (mph)

Sunday Morning Sunday Afternoon Sunday Evening Sunday Night
Olympics NW 0-10 W 5-15 W 5-15 W 5-15
West North WNW 0-10 W 0-10 WSW 5-15 WSW 5-15
West Central NW 0-10 WNW 5-15 WNW 5-15 WNW 5-15
West South NNW 0-10 NW 0-10 NW 5-15 W 5-15
Stevens Pass WNW 5-15 WNW 5-15 WNW 10-20 W 10-20
Snoqualmie Pass NNW 10-20 WNW 15-25 WNW 15-25 WNW 15-25
East North WNW 5-15 WNW 10-20 WNW 10-20 W 10-20
East Central WNW 5-15 WNW 5-15 WNW 10-20 WNW 15-25
East South N 0-10 WNW 0-10 WNW 10-20 WNW 15-25
Mt. Hood NNE 5-15 NW 5-15 W 10-20 W 20-30
Olympics Ridgeline Winds (mph)
Sunday Morning NW 0-10
Sunday Afternoon W 5-15
Sunday Evening W 5-15
Sunday Night W 5-15
West North Ridgeline Winds (mph)
Sunday Morning WNW 0-10
Sunday Afternoon W 0-10
Sunday Evening WSW 5-15
Sunday Night WSW 5-15
West Central Ridgeline Winds (mph)
Sunday Morning NW 0-10
Sunday Afternoon WNW 5-15
Sunday Evening WNW 5-15
Sunday Night WNW 5-15
West South Ridgeline Winds (mph)
Sunday Morning NNW 0-10
Sunday Afternoon NW 0-10
Sunday Evening NW 5-15
Sunday Night W 5-15
Stevens Pass Ridgeline Winds (mph)
Sunday Morning WNW 5-15
Sunday Afternoon WNW 5-15
Sunday Evening WNW 10-20
Sunday Night W 10-20
Snoqualmie Pass Ridgeline Winds (mph)
Sunday Morning NNW 10-20
Sunday Afternoon WNW 15-25
Sunday Evening WNW 15-25
Sunday Night WNW 15-25
East North Ridgeline Winds (mph)
Sunday Morning WNW 5-15
Sunday Afternoon WNW 10-20
Sunday Evening WNW 10-20
Sunday Night W 10-20
East Central Ridgeline Winds (mph)
Sunday Morning WNW 5-15
Sunday Afternoon WNW 5-15
Sunday Evening WNW 10-20
Sunday Night WNW 15-25
East South Ridgeline Winds (mph)
Sunday Morning N 0-10
Sunday Afternoon WNW 0-10
Sunday Evening WNW 10-20
Sunday Night WNW 15-25
Mt. Hood Ridgeline Winds (mph)
Sunday Morning NNE 5-15
Sunday Afternoon NW 5-15
Sunday Evening W 10-20
Sunday Night W 20-30

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

Previous forecast from Apr 13, 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’.