SPOT WEATHER FORECAST

12/16/2008 Weather Discussion: One more clear cold day before a low pressure system slides down from the interior north. This will bring snow to the PNW on Wednesday and Thursday. Long-term models show a return of cold dry arctic air for the weekend. There are early signs of some potential snow late in the weekend or early next week. Forecast from Tuesday 4pm to Wednesday 4am Precipitation .10 in. Water 0-2 in. Snow Temperatures Low 8 High 15 Winds 5-10 W Forecast for Wednesday 4am to 4pm Precipitation .75 in. Water 8-10 in. Snow Temperatures Low 15 High 20 Winds 10-20 W Gusty 40 TRENDS AND TIMING Precipitation: Snow should develop during the early morning hours and increase through the day. Snow should turn to showers Wednesday night and then slowly taper off through Thursday. Storm totals are currently calculating out to be around 8-12” by the end of Thursday. Freezing levels: Freezing levels will trend up tonight from Sea Level to a whopping 1500’. Freezing temps will then drop back to sea level by Thursday morning. Cold temps expected to remain entrenched through the weekend. Winds: Westerly winds will override the east flow later today. Strong westerly winds are expected to pick up and become gusty with the approaching system – could get ridge top wind gust to 40mph tonight and tomorrow. Wind should begin to taper off later in the day.