MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time: 12:30pm

The Snapshot:  Rain and wind diminishing this afternoon with temperatures in the upper 40’s.  There will be another round of moderate to heavy rain and wind tomorrow.  Cooler with light snow showers expected next week.

Current Observations:

Precipitation: Light intermittent rain shower with sun breaks. 1.43” of rain fell over the past 12hrs

Pass temperature: 42

Winds: Gusty, 5-15mph

Barometer: 1011mb slowly falling

Sky: Overcast

Radar: Light rain showers left over in the convergence zone. 

The Forecast:  Light rain showers are expected to continue through the night with another round of heavy rain entering the mountain early tomorrow afternoon.    

Long Range: Cooler air with light snow showers are expected next week.  

The Science: The Puget Sound Convergence Zone kicked in this morning creating an impressive period of heavy rain and thunderstorms.  A cold front moved east of the crest just after 8am this morning; this brought an end to the heavy precipitation and is now providing some sun breaks and few degrees cooler. 

The atmosphere will remain unstable through the night with light rain showers and partial clearing continuing.  A triple point frontal system developing offshore will arrive tomorrow afternoon with another round of moderate to heavy precipitation for the mountains.  

Cool NW flow is expected to develop Sunday evening.  There are no major storms expected with this cooler airmass.  However, the atmosphere will remain unstable which will allow light snow showers to persist. 

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: 1-2  snow: 0 Tomorrow’s 24hr water: 1-1.25  snow: 1-2 Trend and Timing: Light showers this afternoon with the next round of moisture moving in tomorrow afternoon.

Temperature: Low: 36    High:48 Freezing level: 5000’   Trend and Timing: Freezing levels will drop to 5000’ today and then rise back +-6500’ tomorrow.

Winds Base: 5-15 mph Ridge Top: 10-20 mph with gust +-40 likely. Trend and Timing: Winds will be strong today and then begin to diminish tonight.