MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time:  Friday 0700

Current Observations:

24hr Precipitation: 0  

Temperature profile: 36 base, 32 ridge

Pass level winds: light, westerly

Barometer: 1012mbs and falling

Sky: high clouds

Radar: Washington State is mostly dry with the leading edge of the approaching weather off of the Oregon Coast.

The Forecast: Increasing clouds today with light mixed rain and snow tonight. Mostly cloudy and misty might be the best way to describe tomorrow. 

Long Range:  Sunday will be mostly dry with sun breaks.  Next week will start out soggy with the rest of the week trending dry.  

  

The Science: The main energy of the approaching frontal system is tracking into Northern California/Oregon.  The attached occluded front stretching into the PNW waters, will swing inland tonight with a little moisture for the mountains.  Cool air will fill in behind the front dropping freezing levels to +- 4000’ by early tomorrow morning.   Seasonal warming will allow daytime temperatures to recover into the mid to upper 30’s. 

A weak high pressure ridge, between systems, will provide a partly sunny day on Sunday with a warm front lifting up from the south on Monday.

Forecast confidence: Good.

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: .10  snow: trace Tomorrow’s 24hr water: .10  snow: 0 Trend and Timing: Light precipitation will begin after 4pm today with very light passing showers expected tomorrow.

Temperature: Low: 32  High: 48 Freezing level: 7000’- 4000’ Trend and Timing:    Freezing levels will drop to 4000’ early tomorrow morning and rise up to 5000’ during the day.

Winds Base: 5-10 W Ridge Top:  5-10 W Trend and Timing: Winds will be westerly with some gusty periods possible with the passing of the front.