THE WEATHER

12/20/2007 Weather Discussion: A strong Puget Sounds Convergence band positioned right over the Hwy 2 corridor is the cause of our morning snow intensity. Things should begin to calm down and dry out once the cool NW flow takes shape. Looking at a 24 – 36 hour break before Saturday’s storm hits. Long-term models show Saturday’s storm total currently calculating out to be +-1.3” of water with freezing level between 4 and 5K. That could and probable will change one way or another. Another storm is on the heels of Saturday’s system for Sunday/Monday. The NW jet looks like it will keep an active weather pattern over the PNW for most of next week. Forecast from Thursday 4pm to Friday 4am Precipitation .25 in. Water 1-3 in. Snow Temperatures Low 16 High 24 Winds 5-10 NW Forecast for Friday 4am to 4pm Precipitation Lt .10 in. Water trace in. Snow Temperatures Low 16 High 22 Winds 0-5 WSW TRENDS AND TIMING Precipitation: Snow should taper to lingering mountain snow showers by 4pm today. Will keep a chance of snow in the mountains tomorrow but should be just an occasional shower or two. No accumulation expected between 4am tomorrow and 2am Saturday. Freezing levels: Freezing levels are expected to drop to near 2500’ by 10pm tonight. They should stay put tomorrow and then begin to rise early Saturday morning. Winds: The westerly Convergences winds should subside today by noon. A northwest flow will move in. A westerly then southwesterly swing will happen tomorrow as Saturday’s system starts to effect us. PS I will be gone for a week, so I will not be writing forecasts. You can refer to the Northwest Avalanche Centers forecasts at: http://www.nwac.noaa.gov/~nwac/products/SABNW