It's warm out there - mountain temperatures this morning are in the 30s, 40s, and even approaching 50(!) this morning. We'll see the warmth reflected in mid-mountain high temperatures in the 50s to perhaps a few low 60s with freezing levels soaring to 10-11,000' today. The Atmospheric River that dumped copious amounts of water over our region has finally lifted north but there are a few dregs of light rain near the Canadian border this morning. As this boundary fizzles and lifts further north, we'll see mostly sunny skies today for all areas.
After an unseasonably warm overnight with temperatures above freezing, we'll see another warm day on Wednesday. We'll start the day with mostly sunny skies but scattered showers should start to pop up especially south of I-90 mid-day and early afternoon. This warm and unstable air mass will open the door to thunderstorms. Right now, the heaviest showers and thunderstorms look likely to hold off until Wednesday evening and night, but be prepared if thunderstorms start up earlier 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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Tuesday
Partly to mostly sunny this morning, then mostly sunny this afternoon. Light to occasionally moderate ridgeline winds.
Tuesday
Night
Mostly clear with periods of high clouds. Light to occasionally moderate ridgeline winds.
Tuesday
Mostly cloudy this morning with periods of light rain, then partly to mostly sunny with a slight chance of showers in the afternoon. Moderate ridgeline winds.
Tuesday
Night
Mostly clear with periods of high clouds. Moderate ridgeline winds.
Tuesday
Partly to mostly sunny this morning, then mostly sunny in the afternoon. Light to occasionally moderate ridgeline winds.
Tuesday
Night
Mostly clear with periods of high clouds. Light to occasionally moderate ridgeline winds.
Tuesday
Mostly sunny. Light to occasionally moderate ridgeline winds.
Tuesday
Night
Mostly clear with periods of high clouds. Light to moderate ridgeline winds.
Tuesday
Partly sunny this morning, then mostly sunny in the afternoon. Light to occasionally moderate SW ridgeline winds, and light E winds at Pass level.
Tuesday
Night
Mostly clear with periods of high clouds. Light to moderate S-SE ridgeline winds and E Pass level winds.
Tuesday
Partly sunny this morning, then mostly sunny in the afternoon. Light to occasionally moderate SW ridgeline winds, and light E winds at Pass level.
Tuesday
Night
Mostly clear with periods of high clouds. Light to moderate S-SE ridgeline winds and E Pass level winds.
Tuesday
Partly sunny this morning, then mostly sunny this afternoon. Moderate ridgeline winds.
Tuesday
Night
Mostly clear with periods of high clouds. Light to moderate ridgeline winds.
Tuesday
Partly to mostly sunny this morning, then mostly sunny this afternoon. Moderate ridgeline winds.
Tuesday
Night
Mostly clear with periods of high clouds. Light to moderate ridgeline winds.
Tuesday
Mostly sunny. Light to moderate ridgeline winds.
Tuesday
Night
Mostly clear with periods of high clouds. Light to moderate ridgeline winds.
Tuesday
Mostly sunny. Light to moderate ridgeline winds.
Tuesday
Night
Mostly clear with periods of high clouds. Light to occasionally moderate ridgeline winds.
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).