From Monday through Thursday, the annual meeting of the American Meteorological Society will take place in Seattle and they will enjoy nearly perfect weather. Dry and temperatures reaching the upper 40s F each day.
It is fortunate that the meeting wasn't in San Francisco, Los Angeles, or California...locations that will continue to experience rain, wind, and mountain snows.
The infrared satellite image on Sunday night tells the story (below), with a deep low pressure area (swirling clouds) off of Oregon. Cold instability showers are circling around into California. During the next few days the low center will move southward, leaving a ridge of high pressure over our region. Dry and relatively warm conditions will dominate.
Here is the upper level weather map for Thursday morning. The ridge is evident, as is the trough of lower pressure over the hapless folks in California.
The precipitation forecast for the next 72hr indicates nothing over most of WA state, but substantial precipitation over northern CA.
And the forecasts provided by weather.com for Seattle indicate only a slight change of precipitation and temperatures reaching near 50F by the end of the week. Add this weather to the later sunsets (after 5 PM!), will make it seem springlike in the city.
With warmer temperatures and dry conditions, little new snow is expected in the mountains. There were a few inches of snow during the past 24h, which helps covers the ice layer produced by freezing rain this week in the lower passes.