MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Date: Tuesday, February 10, 2020

Current Observations:

24hr Precipitation: 0” SWE/snow

Temperature profile: 28 base/29 upper mtn

Pass level winds: 5-10 westerly / 30-40 westerly upper mtn.

Barometer: 1019 dropping

Sky: Mostly cloudy

Radar: No significant precip across the PNW

The Forecast: Mostly cloudy with light snow this afternoon. Dry and partly cloudy Wednesday.

The Science: The high pressure ridge that has brought sunny and calm weather lately is beginning to flatten out this morning, allowing upper level NW flow to impact the region. Cloud cover will increase and embedded moisture with a weak frontal boundary extending off a low waaay to our north will bring light snow showers this afternoon. A short lived bump of high pressure will move thru tomorrow for a mostly dry and mostly cloudy day with freezing levels bumping up a bit.

Long Range: The pattern this week is progressive with a stronger system arriving Thursday, bringing moderate snow thru Friday morning. Zonal flow sets up for the weekend with heavy snow possible Saturday and Sunday.

Confidence: Good.

Values from 4am today through 4am tomorrow.

Precipitation: Today 24hr water: .10 snow: 1-2” Tomorrow’s 24hr water: <.10  snow: trace Trend and Timing: Light flurries possible this afternoon, mostly dry tomorrow.

Temperature: Low: 24   High: 30 Freezing level: 2500’ Trend and Timing:    Steady temps today and tonight.

Winds Base: 5-10 W Ridge Top: 15-20 W (higher gusts possible this morning) Trend and Timing: Steady moderate winds today, becoming light tonight.