We're in for a pretty quiet weather pattern over the next few days. Lingering low-level moisture and onshore flow continue to maintain clouds and a few showers near and west of the Cascade Crest this morning. Further east, generally, clear skies allowed for more significant cooling last night and the development of some patchy fog. Overall this east/west divide won't change much today.
If you're traveling in the Olympics, west slopes of the Cascades or Passes expect mostly cloudy conditions with the possibility for a few sun breaks in the afternoon. While you could see a stray shower or a few flurries just about anywhere, these will be more common near and north of I-90. As the on-shore flow weakens tonight, look for showers to decrease and skies to begin to clear. This could result in patchy fog developing in the mountain valleys and Passes.
East of the Cascade crest and near Mt Hood today, look for more sunshine with partly cloudy to mostly sunny skies. Overnight, expect temperatures to drop and valley fog and low clouds to return.
A high-pressure ridge continues to develop as we move into Thanksgiving Day. This should bring us partly to mostly sunny skies, with a few passing bands of high clouds. While it could be chilly to start the day, sunshine and generally light winds will allow temperatures to warm in the afternoon.
Weather Forecast
Olympics
West North
West Central
West South
Stevens Pass
Snoqualmie Pass
East North
East Central
East South
Mt. Hood
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Wednesday
Mostly cloudy in the morning becoming mostly sunny.
Wednesday
Night
Mostly clear with low clouds and fog possible.
Wednesday
Mostly cloudy with a few sun breaks possible. Isolated showers.
Wednesday
Night
Mostly cloudy with a few stray showers in the evening, then skies breaking.
Wednesday
Mostly cloudy with a few sun breaks possible. Isolated showers.
Wednesday
Night
Mostly cloudy with a few stray showers in the evening, then skies breaking.
Wednesday
Partly to mostly cloudy with a few stray showers possible.
Wednesday
Night
Partly cloudy to mostly clear with log clouds and fog developing.
Wednesday
Mostly cloudy with sun breaks. Isolated showers possible. Light westerly pass flow.
Wednesday
Night
Partly cloudy with low clouds and fog developing in the Pass. Flow turning more easterly.
Wednesday
Mostly cloudy with sun breaks. Isolated showers possible mainly in the morning. Light westerly pass flow.
Wednesday
Night
Partly sunny becoming mostly clear with low clouds and fog developing. Pass flow turning east overnight.
Wednesday
Mostly cloudy in the morning becoming partly to mostly sunny. Light to moderate W winds.
Wednesday
Night
Partly to mostly clear with low clouds and valley fog developing.
Wednesday
Mostly cloudy near the Crest and mostly clear further east. Becoming partly to mostly sunny with light to moderate WNW winds.
Wednesday
Night
Partly to mostly clear with low clouds and valley fog forming. Light to moderate NW winds decreasing.
Wednesday
Mostly cloudy near the Crest and mostly clear further east. Becoming partly to mostly sunny with light to moderate NW winds.
Wednesday
Night
Partly to mostly clear with low clouds and valley fog forming.
Wednesday
Mostly cloudy on the S and W sides of Hood with a few isolated showers possible. Mostly clear to the E. Becoming partly to mostly sunny.
Wednesday
Night
Partly to mostly clear with patchy low clouds and valley fog developing.
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).