STEVENS PASS MOUNTAIN WEATHER

12/13/2011 Weather

General Discussion: Clouds will continue to thicken today as a weak system slides in from the north.

Long-term: A weak low pressure system developing off the BC coast will produce a few inches of snow late tomorrow night and Thursday. High pressure is expected to develop on Friday for a dry and warm weekend. Persistent high pressure will probably keep storms north of the PNW through most of next week.

24 hour Forecast Starting at NOON on Tuesday

Cumulative Precipitation Totals:
“water by midnight= < .10
“water by 4am= .10
24hr total “of water = .10

24hr Snow Total= trace - 1

Trend and Timing:
Light snow showers will be likely through noon tomorrow. A few inches of snow will be possible late tomorrow night and Thursday.

Base Area Temperatures (F):
Low: 24 High: 28

Freezing level: 1500’ 3500’

Trend and Timing:
The cold air settled in the eastern basin will eventually lose the battle from the warmer air moving in from the west. Freezing levels are expected to rise to 3500’ tonight. Freezing levels above 4500’ will be likely over the weekend.

Winds Speed (mph)/Direction
5-10 W

Trend and Timing:
Southerly flow moving up the east slope will give way to westerly flow later today.