Issued: 6:54 AM PST Thursday, January 13, 2022
by Dallas Glass

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

Weather Synopsis

A compact band of precipitation will rotate through the region this morning bringing a few hours of moderate rain and high elevation snow to the mountains. The bulk of the precipitation should focus on the southern volcanoes with locations near Mt Hood and Mt St Helens set to see the highest totals. While most areas will experience dry conditions by the afternoon hours, rain and snow could linger for sites near the Washington-Oregon border into the evening. Moderate to strong SW winds associated with this weakening front will very quickly decrease and turn more northerly as the parent low-pressure shifts inland during the day. 

A high-pressure ridge will build into the Pacific Northwest overnight and help the mountains dry out. You may find weak inversions in the valleys and passes leading to low-level clouds and fog that could persist into the morning. Friday should be a mostly sunny and dry day. Warmer air will push into the region under the ridge sending our freezing levels on a steady march upward. This will continue an extended period of warm weather that began this past Tuesday and should at least last through the weekend. 

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
Thursday Periods of moderate rain and snow in the morning. Heaviest in the southern and western Olympics. Drying in the afternoon.
Thursday Night Mostly clear with valley fog. Warming.
Thursday A brief period of rain and snow in the morning. Moderate S winds quickly decreasing and becoming northerly.
Thursday Night Mostly clear with some low clouds and fog. Winds becoming S overnight and increasing.
Thursday A brief period of rain and snow in the morning. Moderate SSW winds quickly decreasing.
Thursday Night Mostly clear with some low clouds and valley fog.
Thursday Rain and snow, mainly in the morning. Heaviest near Mt St Helens and Mt Adams. Moderate SSW winds quickly decreasing.
Thursday Night Partly cloudy. Scattered showers possible near Mt St Helens and Mt Adams. Low clouds and fog possible further north.
Thursday A brief period of rain and snow in the morning. Weak E flow at Pass level decreasing.
Thursday Night Mostly clear with low clouds and fog. Weak inversion at Pass level. E flow returning overnight.
Thursday Rain and snow mainly in the morning. E flow at Pass level becoming W.
Thursday Night Mostly clear. Weak inversion at Pass level. Low clouds and fog. E flow returning overnight.
Thursday Mostly cloudy with scattered showers in the morning. More sunshine possible in the afternoon.
Thursday Night Mostly clear with light winds.
Thursday Cloudy with scattered showers in the morning. Moderate SW winds quickly decreasing. Some clearing in the afternoon.
Thursday Night Mostly clear with low clouds and valley fog particularly closer to the Cascade crest.
Thursday Cloudy with showers in the morning. Moderate SW winds decreasing.
Thursday Night Partly to mostly clear. Patchy fog possible further north in the zone.
Thursday Moderate rain and snow throughout the day. Strong SW winds becoming W.
Thursday Night Rain and snow showers in the evening, ending overnight with some drying. Warming.

Precipitation (in)

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

Snow Level (ft)

Thursday Morning* Thursday Afternoon Thursday Evening Thursday Night* Friday Morning* Friday Afternoon*
Olympics 5500' 5000' 7500' 8500' 9000' 9000'
West North 5500' 5000' 6500' 6500' 7000' 8000'
West Central 5500' 5000' 6500' 6500' 7500' 8500'
West South 5500' 4500' 6000' 6500' 7500' 9000'
Stevens Pass 5500' 5000' 6500' 6000' 7000' 7500'
Snoqualmie Pass 5000' 4500' 6500' 6500' 7000' 8500'
East North 5000' 5000' 5500' 6000' 6000' 7000'
East Central 5000' 4500' 6000' 6500' 6500' 7000'
East South 5000' 4500' 6000' 6000' 6500' 8000'
Mt. Hood 6000' 4500' 6500' 7000' 8000' 9500'
Olympics Elevation
Thursday Morning* 5500'
Thursday Afternoon 5000'
Thursday Evening 7500'
Thursday Night* 8500'
Friday Morning* 9000'
Friday Afternoon* 9000'
West North Elevation
Thursday Morning* 5500'
Thursday Afternoon 5000'
Thursday Evening 6500'
Thursday Night* 6500'
Friday Morning* 7000'
Friday Afternoon* 8000'
West Central Elevation
Thursday Morning* 5500'
Thursday Afternoon 5000'
Thursday Evening 6500'
Thursday Night* 6500'
Friday Morning* 7500'
Friday Afternoon* 8500'
West South Elevation
Thursday Morning* 5500'
Thursday Afternoon 4500'
Thursday Evening 6000'
Thursday Night* 6500'
Friday Morning* 7500'
Friday Afternoon* 9000'
Stevens Pass Elevation
Thursday Morning* 5500'
Thursday Afternoon 5000'
Thursday Evening 6500'
Thursday Night* 6000'
Friday Morning* 7000'
Friday Afternoon* 7500'
Snoqualmie Pass Elevation
Thursday Morning* 5000'
Thursday Afternoon 4500'
Thursday Evening 6500'
Thursday Night* 6500'
Friday Morning* 7000'
Friday Afternoon* 8500'
East North Elevation
Thursday Morning* 5000'
Thursday Afternoon 5000'
Thursday Evening 5500'
Thursday Night* 6000'
Friday Morning* 6000'
Friday Afternoon* 7000'
East Central Elevation
Thursday Morning* 5000'
Thursday Afternoon 4500'
Thursday Evening 6000'
Thursday Night* 6500'
Friday Morning* 6500'
Friday Afternoon* 7000'
East South Elevation
Thursday Morning* 5000'
Thursday Afternoon 4500'
Thursday Evening 6000'
Thursday Night* 6000'
Friday Morning* 6500'
Friday Afternoon* 8000'
Mt. Hood Elevation
Thursday Morning* 6000'
Thursday Afternoon 4500'
Thursday Evening 6500'
Thursday Night* 7000'
Friday Morning* 8000'
Friday Afternoon* 9500'

5000' Temperatures (°F)

Thursday Thursday Night
Max / Min Max / Min
Olympics 38 / 35 35 / 28
West North 38 / 33 37 / 27
West Central 39 / 33 38 / 28
West South 38 / 35 38 / 29
Stevens Pass 39 / 33 39 / 30
Snoqualmie Pass 39 / 34 38 / 30
East North 37 / 28 35 / 27
East Central 40 / 33 38 / 30
East South 39 / 33 38 / 31
Mt. Hood 39 / 32 39 / 28
Olympics 5000' Temperature Forecast
(Max / Min)
Thursday 38 / 35
Thursday Night 35 / 28
West North 5000' Temperature Forecast
(Max / Min)
Thursday 38 / 33
Thursday Night 37 / 27
West Central 5000' Temperature Forecast
(Max / Min)
Thursday 39 / 33
Thursday Night 38 / 28
West South 5000' Temperature Forecast
(Max / Min)
Thursday 38 / 35
Thursday Night 38 / 29
Stevens Pass 5000' Temperature Forecast
(Max / Min)
Thursday 39 / 33
Thursday Night 39 / 30
Snoqualmie Pass 5000' Temperature Forecast
(Max / Min)
Thursday 39 / 34
Thursday Night 38 / 30
East North 5000' Temperature Forecast
(Max / Min)
Thursday 37 / 28
Thursday Night 35 / 27
East Central 5000' Temperature Forecast
(Max / Min)
Thursday 40 / 33
Thursday Night 38 / 30
East South 5000' Temperature Forecast
(Max / Min)
Thursday 39 / 33
Thursday Night 38 / 31
Mt. Hood 5000' Temperature Forecast
(Max / Min)
Thursday 39 / 32
Thursday Night 39 / 28

Ridgeline Winds (mph)

Thursday Morning Thursday Afternoon Thursday Evening Thursday Night
Olympics S 5-15 NE 0-10 VAR 0-10 S 10-20
West North S 15-25 NNW 5-15 NE 0-10 S 10-20
West Central SSW 10-20 NW 0-10 ENE 0-10 SSW 5-15
West South SSW 15-25 W 0-10 VAR 0-10 SSE 5-15
Stevens Pass W 5-15 NW 0-10 VAR 0-10 SSW 5-15
Snoqualmie Pass WSW 10-20 WNW 5-15 VAR 0-10 SSW 5-15
East North W 5-15 NNW 5-15 NNE 0-10 W 5-15
East Central WSW 10-20 NNW 5-15 NE 5-15 SW 5-15
East South SW 10-20 NW 5-15 NE 5-15 SE 5-15
Mt. Hood SW 25-35 W 20-30 NNW 5-15 SE 5-15
Olympics Ridgeline Winds (mph)
Thursday Morning S 5-15
Thursday Afternoon NE 0-10
Thursday Evening VAR 0-10
Thursday Night S 10-20
West North Ridgeline Winds (mph)
Thursday Morning S 15-25
Thursday Afternoon NNW 5-15
Thursday Evening NE 0-10
Thursday Night S 10-20
West Central Ridgeline Winds (mph)
Thursday Morning SSW 10-20
Thursday Afternoon NW 0-10
Thursday Evening ENE 0-10
Thursday Night SSW 5-15
West South Ridgeline Winds (mph)
Thursday Morning SSW 15-25
Thursday Afternoon W 0-10
Thursday Evening VAR 0-10
Thursday Night SSE 5-15
Stevens Pass Ridgeline Winds (mph)
Thursday Morning W 5-15
Thursday Afternoon NW 0-10
Thursday Evening VAR 0-10
Thursday Night SSW 5-15
Snoqualmie Pass Ridgeline Winds (mph)
Thursday Morning WSW 10-20
Thursday Afternoon WNW 5-15
Thursday Evening VAR 0-10
Thursday Night SSW 5-15
East North Ridgeline Winds (mph)
Thursday Morning W 5-15
Thursday Afternoon NNW 5-15
Thursday Evening NNE 0-10
Thursday Night W 5-15
East Central Ridgeline Winds (mph)
Thursday Morning WSW 10-20
Thursday Afternoon NNW 5-15
Thursday Evening NE 5-15
Thursday Night SW 5-15
East South Ridgeline Winds (mph)
Thursday Morning SW 10-20
Thursday Afternoon NW 5-15
Thursday Evening NE 5-15
Thursday Night SE 5-15
Mt. Hood Ridgeline Winds (mph)
Thursday Morning SW 25-35
Thursday Afternoon W 20-30
Thursday Evening NNW 5-15
Thursday Night SE 5-15

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

Previous forecast from Jan 12, 2022

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’.

Updated Mountain Weather Zone Name Changes – December 2020