Scattered showers across the southern half of the forecast area this morning should continue as a low-pressure system slides southward off of our coast on its way to California. The latest weather models show slightly less precipitation than they did yesterday. Trailheads south of Highway 2 may see a dusting of snow, with locations around the volcanoes receiving a few inches. Most of the region will experience cloudy, cold, and generally calm weather Thursday.
A few lingering showers may hang around in the evening hours near Mt Rainier, Mt St. Helens, and Mt Hood as conditions dry out from north to south. Look for mostly cloudy skies overnight with some clearing as drier weather slips back into the Northwest. By Friday, mountain locations should see mostly sunny skies and cool temperatures as high pressure builds back over the eastern Pacific making for a very pleasent day.
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
Cloudy with isolated snow showers in the morning.
Thursday
Night
Cloudy and calm.
Thursday
Mostly cloudy with sun breaks possible in the afternoon.
Thursday
Night
Partly cloudy with clearing.
Thursday
Cloudy with isolated showers in the morning.
Thursday
Night
Mostly cloudy and calm.
Thursday
Cloudy with scattered light showers. Heaviest near the volcanoes.
Thursday
Night
Cloudy with isolated showers in the evening. Drying overnight.
Thursday
Cloudy with isolated showers in the morning.
Thursday
Night
Mostly cloudy. Light easterly flow.
Thursday
Cloudy with isolated showers in the morning.
Thursday
Night
Cloudy. Light to moderate east flow.
Thursday
Mostly cloudy.
Thursday
Night
Mostly cloudy with some clearing overnight.
Thursday
Mostly cloudy with isolated showers.
Thursday
Night
Mostly cloudy with some clearing overnight.
Thursday
Cloudy with isolated showers.
Thursday
Night
Cloudy with isolated showers in the evening. Some clearing possible.
Thursday
Cloudy with scattered showers.
Thursday
Night
Cloudy with isolated showers in the evening. Drying overnight.
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).