SPOT WEATHER FORECAST

11/20/2009 Weather Short term: This very complex weather pattern snuck in some upper level ridging last night and pushed the moisture north; thus, we got the warm air with little precipitation. This also allowed the approaching cold front to move in quicker, bringing lowering temperature and more snow through the weekend. Long-term: The overall pattern is still in place but has the look of change. The weekend will bring a mixed bag of weather as several unorganized fronts move through. Long-range models differ greatly on what is to come next week, so it’s not even worth a guess at this point. 24 hour forecast starting at noon on Friday Precipitation “ Water: .5+ “ of Snow: 6-8 temperatures (F): 4000’ Low: 26 High: 30 5000’ Low: 22 High: 28 Winds speed/Direction Pass level: 5-15 W Ridge top: 10-20 W TRENDS AND TIMING Precipitation: Moderate snow showers will persist through the next 24 hours. Convergence flow will help increase the orographics and bring periods of heavy snow tonight. Should have most of the forecasted snow on the ground by 7 am tomorrow. Snow will intensify tomorrow night and continue through Sunday. Freezing levels: Freezing levels will continue to fall through the day reaching 2500’ by midnight or so. Freezing levels will then bounce between 2000' and 4000’ as these weak fronts move through. Should stay below pass level through the weekend. Winds: SW flow will shift to westerly today. A weak convergence period will bring the potential for some steady 10-12 mph winds through the pass this evening. Wind will taper as it shift SW tomorrow. jdm