11/18/2012 Stevens Pass Mountain Weather Forecast

General Discussion: Telemetry shows 4-5” of new snow in the base area. The next system will bring heavy precipitation to the resort tonight and tomorrow. Expect wet heavy snow through the night changing to rain tomorrow. See 24hr freezing levels trends below.

Long-term: Active weather will continue as several more systems set up to hit the PNW with similar freezing level challenges. A cold front will bring snow on Wednesday with another rain event possible on Thursday/Friday.

24hr Accumulative Precipitation Totals Starting at Noon Today:
“Water by midnight= .25-.5
“Of additional water by 4am= >.25
“Of additional water by 12pm=.25-.5

24hr (12pm-12pm) Inches of Water = 1-1.25

24hr (12pm-12pm) Inches of Snow = 6-8” below 4500’, +8-12” on the ridge top.

Trend and Timing:
Wet heavy snow is expected through the night. Snow changing to rain is expected after 7am tomorrow morning. Heavy rain with mixed with snow will continue for the first half of the week.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 28 High: 36
Freezing level: 3500’ 5000’

Trend and Timing:
Freezing levels will gradually increase from 3500’ to 5000’ through the next 24hrs.

24hr Winds Speed (mph)/Direction Starting at Noon Today
Base: 0-10 E
Ridge Top: 5-10 ESE gusty

Trend and Timing:
East flow at the surface will continue through the night. Southerly flow aloft will strengthen with the approach and passing of the front.