Showing posts from February, 2020


Stevens Pass Mountain Weather Forecast Date: Saturday, February 29, 2020

Current Observations: 24hr Precipitation: .57” SWE / 8” snow Temperature profile: 30 base / 26 mid mtn Pass level winds: Light westerly Barometer: 1012 rising slowly Sky:Overcast, snowing lightly Radar: Spotty convergence showers throughout the crest.

The Forecast: Diminishing showers and cool this afternoon. Partly sunny and dry tomorrow with daytime warming.
The Science: A low pressure trough deepens and sags southeast today, turning upper level flow northerly. NW post-frontal winds should diminish today, with cooler and drier air advection this afternoon and tomorrow. We’ll see if an afternoon convergence zone keeps the snow showers going. Either way the day should finish with clearing skies and tomorrow should start out dry and partly sunny.
Long Range: The next system rides over a flat high pressure ridge Sunday night/Monday. Snow is likely Monday, although amounts aren’t particularly impressive. Active weather…

7:30 No ABS Sunday March 1

6:15 Start Sat Feb 28th ABS


Stevens Pass Mountain Weather Forecast Friday, February 28, 2020, 0900
Current Observations: 24hr Precipitation:0 Temperature profile:32 base, 36 ridge Pass level winds:light WSW Barometer:1016mb’s and falling Sky:clear with high cirrus clouds moving in Radar:dry throughout the region with the approaching cold front a few 100 miles offshore.

The Forecast: Increasing clouds, falling temperatures and snow tonight.Snow showers persist tomorrow with Sunday trending dry.
The Science:Visible satellite images show a district shear line of clouds out a head of the approaching cold front tracking ENE.The current temperature inversion will be quickly be overtaken by strong, cool, unstable westerly flow this afternoon.The Puget Sound convergence zone is expected to develop with periods of moderate snow for Stevens Pass overnight.The precipitation will transition to showers during the early morning hours with moderate passing snow showers through the day tomorrow.
Long Range. Sunday will be mostly …

8:00 Start Fri Feb 28th no ABS


Stevens Pass Mountain Weather Forecast Thursday, February 27, 2020, 0830
Current Observations: 24hr Precipitation:0.02swe,0 snow Temperature profile:33 base, Pass level winds: Barometer:1026mb’s and holding Sky:overcast with very light snow falling Radar:dry in the mountains with rain falling Bellingham north

The Forecast: Mostly dry today and most of tomorrow with temperatures peaking near 40 today.Snow arrives tomorrow night with snow showers persisting through Saturday.
The Science:The next 24-36hrs will be fairly quiet with mild temperatures.A cut-off low pressure cell with an embedded cold front will track into southern BC tomorrow.Cool unstable NW flow will be pulled along its southern boundary; thus, expect falling temperatures, good orographic snowfall (convergence) and windy conditions heading into the weekend.Snow totals are in questions due to the convergence dynamics… Snow showers, gusty winds with freezing levels -+2500’ will be the weather game on Saturday.
Long Range. Sunday…

8:00 Start Thurs Feb 26th no ABS


Stevens Pass Mountain Weather Forecast Wednesday, February 26, 2020, 0830
Current Observations: 24hr Precipitation:.09 swe, 1” snow Temperature profile:32 base, 28 ridge Pass level winds:light, westerly – gustier on the upper ridges. Barometer:1025mb’s and inching up Sky:Pass level fog with broken midlevel clouds and snow showers. Radar: Intermittent snow showers falling at Stevens Pass with mostly dry conditions everywhere else.

The Forecast: Diminishing snow showers today with partial clearing tonight.Temperatures will be in the lower 30’s with warmer temperatures expected tomorrow and Friday.
The Science:A weak front is passing over the crest this morning producing some intermittent snow showers.The barometric pressure rises behind the front which will begin to dry up the precipitation.Warm air advections from the south will make its way north over the next 24-36hrs pushing freezing levels to +-5000’ by tomorrow afternoon. No significant moisture is expected through Friday noon.

8:00 No ABS Wednesday the 26th


Stevens Pass Mountain Weather Forecast Tuesday, February 25, 2020, 0930
Current Observations: 24hr Precipitation:.02swe,0 snow Temperature profile:24 base, 24 ridge Pass level winds:light, ESE Barometer:1028mb’s and holding Sky:high clouds Radar:mostly dry with some light scattered rain showers showing up along the coast

The Forecast: Mostly dry and sunny today with increasing clouds, rising temperatures, and light mixed rain and snow possible tonight.The rest of the week will be mostly dry with warming temperatures.
The Science:A warm front will approach the region today with light precipitation in tow. A weak passing high pressure ridge will move in tomorrow for a few days of generally dry, benign weather.A cold front makes its way in on Friday with some snow and cooler temperatures preparing for the weekend.
Long Range. Snow on Saturday with models providing mixed signals beyond.
Confidence: Good.
Values from 4am today through 4am tomorrow.