Mountain Weather Forecast

Stevens Pass Mountain Weather Forecast

Day and Time: Sunday 0700

Current Observations:

24hr Precipitation:   0”

Pass temperature:  34 base area / 42 upper mountain

Pass level winds:  Light, westerly

Barometer:   1022

Sky:  Clear

Radar:  No precipitation in Washington State

The Forecast: Sunny, warm, and mild with decreasing winds Sunday. Inversion conditions developing Sunday night and continuing Monday.

Long Range:  The ridge starts to flatten by the middle of next week, bringing increasing clouds and lowering freezing levels. It departs entirely by the end of the week, allowing Pacific storms to return to our lexicon.

  

The Science: Main forecast problem for the next 24 hours is when the east flow will begin. The high pressure ridge axis remains a bit offshore this morning, and should move inland this afternoon, changing pressure gradients enough that east flow will develop thru Stevens Pass. This should bring the normal complement of base area fog and below freezing temperatures, with warm air and sun above the inversion line.

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: 0  snow: 0 Tomorrow’s 24hr water: 0  snow: 0 Trend and Timing: No precipitation expected for the next 48 hours.

Temperature: Low: 28   High: 42 Freezing level: 8,000’ Trend and Timing:    Warm all day Sunday. Cooling Sunday night and Monday.

Winds Base: Light W, then E 5-10 Ridge Top: 15-20 W, then E10-20 Trend and Timing: Wind will become light and variable Sunday afternoon, switching to easterly Sunday night and Monday.