Mountain Weather Forecast

Stevens Pass Mountain Weather Forecast

Day and Time: Sunday 0645

Current Observations:

24hr Precipitation:   .56” SWE / 7” snow mid-mtn

Pass temperature: 32 base / 27 ridgetops

Pass level winds: Light from the east

Barometer:  Falling slowly, at 1006

Sky: Obscured and snowing

Radar: Widespread rain and snow across Washington and western Oregon

The Forecast: Snow showers ending mid-morning, with partly cloudy skies and warming temperatures Sunday afternoon. Mixed rain and snow beginning Monday morning, becoming moderate to heavy Monday afternoon.

  

The Science: A stationary low in the Pacific has directed a series of disturbances across the PNW over the past 48 hours. The most recent one more heavily affected Oregon, but the southern and central Washington Cascades have gotten a piece of the action as well. As the frontal boundary drifts east this morning, precipitation should end and temperatures will come up a bit. The next round arrives late Sunday night/Monday morning, with higher freezing levels than we have experienced lately. A decent shot of moisture is expected Monday afternoon.

Long Range:  There will sort of be a break on Tuesday, with offshore ridging and NW flow aloft bringing cloudy skies and a chance of snow showers. Another system arrives from the NW on Wednesday/Thursday with snow likely again at Pass level. Friday currently looks dry with another system for next weekend.

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: <.25  snow: 1-3” Tomorrow’s 24hr water: .5-.75    snow: 1-3” upper mountain / 0” base area Trend and Timing: Snow showers ending Sunday morning. Mixed precip beginning Monday morning.

Temperature: Low: 27    High: 40 Snow/Freezing level: 3500-5000’ Trend and Timing:    Free air freezing levels will bump up this afternoon.

Winds Base: E-W-E 5-10 Ridge Top: Variable 10-15 Trend and Timing: East winds this morning should shift westerly during the day, then back to east Monday morning.