SPOT WEATHER FORECAST

11/21/2009 Weather Short term: A vigorous frontal system will push through tonight bring heavy snow to the Cascades through tomorrow afternoon. It will be great downhill sliding again tomorrow. Long-term: A high-pressure ridge will traverse the PNW late Sunday. This will bring a brief dry period before the next system approaches late Monday/Tuesday. 24 hour forecast starting at noon on Saturday Precipitation “ Water: .75-1 “ of Snow: 10-14 temperatures (F): 4000’ Low: 26 High: 30 5000’ Low: 24 High: 28 Winds speed/Direction Pass level: 5-10 W then shift SW Ridge top: 5-15 W Then shift SW TRENDS AND TIMING Precipitation: Snow will ramp up today as the next front approaches. Should see 6-10” on the ground by 4am and then the rest by noon or so. Snow will quickly taper off tomorrow afternoon as the pressure begins to rise. Freezing levels: Freezing levels will rise today to reach 4000’ after 4pm today. Cold air will fill in behind the front tomorrow bringing freezing levels back down to 2500’ by noon tomorrow. Snow levels should remain below pass level through Monday. Winds: The current westerly’s will shift SW as the front moves through tonight. The winds will continue its counterclockwise rotation and become easterly in the morning and then westerly by tomorrow afternoon. The wind will be blustery at times but shouldn’t pose much of a problem. jdm