MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time: Thursday 0630

Current Observations:

24hr Precipitation:  0

Temperature profile: 31 base,  31 ridge

Pass level winds: Calm, westerly

Barometer: 1015mb’s and rising

Sky: mostly clear

Radar: dry conditions in the mountains with mixed rain and snow falling on the Waterville plateau. 

The Forecast: Broken clouds with a chance of light passing rain showers will be the weather pattern through the weekend.  Early morning temperatures will struggle to drop below freezing with daytime temperatures peaking in the upper 40’s to 50.

Long Range: This fairly typical spring weather of light passing rain showers and sun breaks will likely continue into next week. 

  

The Science: Models continue to have completely different views of what will happen over the next 3-5 days.  In general, the atmosphere will remain unstable with very weak pressure gradients.  The convection process is underway which could produce some late afternoon thunderstorms. 

Geek Speak:  Convection - The sun heats the earth surface, then, when cooler air (say, from snow) comes in contact with it, the air warms and rises, creating and upward current. That current can result in wind, building cumulus clouds and possibly thunderstorms. 

Forecast confidence: fair.

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water:  .10 snow: 0 Tomorrow’s 24hr water: .10  snow: 0 Trend and Timing: Light passing rain showers possible.

Temperature: Low: 32   High:45 Freezing level: > 5000’ Trend and Timing:    Freezing levels will rise above 5000’ today and peak +6500’ tomorrow and through the weekend.

Winds Base: 0-5 WSW Ridge Top: 0-10 SW Trend and Timing: Winds will be generally calm with SW flow aloft.