SPOT WEATHER FORECAST

12/9/2009 Weather Short term: The high pressure that has gripped us the last week will begin to degrade and slowly move east. This will allow warm air from the southwest to invade. In fact, it is currently a few degrees warmer on the upper mountain than in the base area. This transition will be very slow so expect the sun with some high clouds to stick around for the remainder of the week. Watch for an inversion layer to develop as dew points and humidity’s rise. Long-term: This slow pattern change will continue into the weekend. A system tracking up from Oregon could bring the potential for some precipitation on Saturday. Details on this system are still sketchy- these “wrap around” (tracking in from the south east) events are not usually big snow producers. But, it’s a start. 24 hour forecast starting at noon on Wednesday Precipitation “ Water: 0 “ of Snow: 0 temperatures (F): 4000’ Low: 14 High: 20 5000’ Low: 16 High: 24 Winds speed/Direction Pass level: 0-5 NNW Ridge top: 0-5 NNW – shifting W TRENDS AND TIMING Precipitation: 0 Freezing levels: Freezing levels should lift from sea level today and reach 2000’ by Friday morning. We will continue to have cool nights with day time temperature reaching the 20’s. This diurnal temperature pattern could produce a melt freeze cycle above 4000’ during the next 2-4 days. Winds: Very light winds out of the north will slowly swing westerly in the next 24 hours. Light westerly flow will continue into the weekend. Could see some light east flow at the surface as gradients fight for position, but for the most part, the winds will be very light regardless of direction. JDM