MOUNTAIN WEATHER FORECAST

Time and Day: 0800 Monday

The Snapshot: One more day of snow before it all ends tonight.  The rest of the week will be mostly dry with a little snow and colder by the weekend.  We may even get some sunshine.

 

The Science:  The low pressure system off the western coast will spin one more band of moisture through the PNW today.   A high pressure ridge forming over the interior west will keep most of the moisture confined to the west coast starting tomorrow.   The eastern basin of Washington will also continue to cool down as more cold air streams in from the northeast today and tomorrow.  Wednesday, freezing levels will rise to around 4000’ under southerly flow.    

 

4-7day Long Range:   The end of the week will be mostly dry with the exception a of weak disturbance making its way into the region on Friday.  Another round of cold arctic air arrives over the weekend with unseasonably low temperatures.

Precipitation: Water by 4am = .25 -.5  Snow = 4-6 24hr total inches of water ending at noon tomorrow = .5 24hr total inches of snow ending at noon tomorrow = 4-6   Trend and Timing: Today will be similar to yesterday with snow tapering off tonight. No new snow is expected after midnight with some partial clearing beginning tomorrow.

Base Temp and Freezing levels:  Low: 14  High: 22 Freezing level:  +-2500’   Trends and Timing Freezing levels will remain low over Stevens Pass under cool easterly flow  through tomorrow.   Freezing levels begin to rise on Wednesday.

Winds (mph) Base: 5-10 E Ridge Top: 5-15 E gusty   Trend and Timing: Easterly winds will increase today with persistent ridge top winds through the night and tomorrow.