Well I hate to be a party pooper, but the warming is occurring aloft and the snow is fated to turn to rain. Here is the latest vertical sounding (10 PM) of temperature at Seattle. The temperature structure aloft is shown every hour (1206 is ten pm, time is in GMT)
The temperature has warmed up considerably above 800 meters (around 2500 ft). You notice that the temperature is nearly constant in the lowest portion of the atmosphere..that is not a coincidence...it is very close to 32F all the way down since the precipitation is melting as it falls.
Here are the winds in the lowest 400o meters of the atmosphere from ten pm yesterday to 10 PM today. Strong southwesterly flow is found aloft (50 kts!) and the SW flow is moving down. SW flow is warm and moist.
You get the picture...this pretty snow is not going to last...it will turn to wet snow and then rain over the next 2-6 hours over most of the lowlands, depending where you are.
The other interesting story are the winds. There is a huge pressure difference the Cascades and some locations on the east side of the Sound and in the foothills are getting 40-50 mph gusts--like North Bend, Snoqualmie Ridge, and some locations near Enumclaw.
