MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time: Thursday 0700

The Snapshot: Unfortunately, the snow we hoped for last night slid right on by and headed to Oregon.

Mostly dry today with light passing snow showers expected tomorrow.  The weekend will be dry with colder temperatures moving in.  We could see the lowest temperatures of this winter season early Sunday morning.

Current Observations:

Precipitation: .01” of moisture showing up on the telemetry.   

Pass temperature: 32

Winds: 5-10 E

Barometer: fallen to 1003mb’s  

Sky:  overcast

Radar:  The State is mostly dry with all of the moisture now in Oregon.

The Forecast: Cloudy today with temperatures near freezing.  Light passing snow showers will be possible tomorrow with dry and cold weather developing over the weekend.     

Long Range: The dry and cold weather pattern will likely continue through most of next week.

  

The Science: Most of the energy has shifted to the SW of Washington State. Isobars are slacking with some weak mid-level ridging developing.  A weak low pressure system will track down the PNW coastal waters over the next 24-36hrs.  Similar to yesterday, most of the moisture will remain west of the Cascade Crest as it moves south. 

Cold Temperatures:  An elongated high pressure ridge stretching in the Gulf of Alaska will be the mechanism to allow cold northerly air to flow into eastern Washington over the weekend.  Winds blowing in from the interior north will carry a cold dry air mass into the PNW starting on Saturday.  Early morning temperatures could drop into the middle teens. In the long term (Sunday – Thursday) the atmosphere will become stable and thus, cold and clear.  

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: .10  snow: trace Tomorrow’s 24hr water: <.25   snow: 0-2 Trend and Timing: Occasional light passing snow showers will persist through early Saturday morning.

Temperature: Low:28     High:34 Freezing level: +- 4000’ Trend and Timing:    Freezing levels will hold at 4000’ through tomorrow with colder air moving in on Saturday.

Winds Base: 0-5 E Ridge Top: 5-10 E Trend and Timing: East flow will strengthen today.