John Meriwether

12/13/2007 Weather Discussion: Some low level warm air advection associated with the shifting jet stream is the culprit of our freezing drizzle. Mountain snow developing today as frontal bands of moisture precede the larger front tomorrow night. Long-term models show Saturday’s storm setting up nicely. We should begin to feel the effects late Friday night or early Saturday morning. Another storm is tracking in for Sunday/Monday and then another has potential for Tuesday. All in all should be a busy week of weather. Forecast from Thursday 4pm to Friday 4am Precipitation .25 in. Water 2-4 in. Snow Temperatures Low 25 High 32 Winds 5-10 W gusty Forecast for Friday 4am to 4pm Precipitation .25 in. Water 1-3 in. Snow Temperatures Low 28 High 34 Winds 0-5 SW TRENDS AND TIMING Precipitation: Some mountain snow possible through the next 24hours. There will be a brief drier period tomorrow morning as the stronger front sets up its arrival. The timing is still under debate for Friday night or Saturday morning. Could see some mixed rain and snow tomorrow afternoon but it should be brief, if at all. Freezing levels: Freezing levels will rise to near or just above pass level by midday tomorrow but should drop back down below the pass level by 7pm. Freezing levels look to be in our favor for the weekend. Winds: Westerly flow will remain in place today with some gusty periods possible. There will be a brief east flow event tomorrow afternoon as the bigger system approaches the coast. Possible strong convergence winds on Saturday - will get a better feel for that in tomorrows model runs.