Time and Day:  0700 Sunday

The Snapshot:   Cold with light snow developing this afternoon. Continued light snow Monday.

Current Observations:  No new snow overnight, single digits and mostly clear this morning with light east winds. RH is 82% and barometer is slowly dropping.

The Science:   The surface high pressure that brought us such a beautiful day yesterday will flatten out Sunday, allowing a weak frontal system to impact the area beginning Sunday afternoon. NNW upper level flow will maintain light orographic snow showers on Monday. A large Arctic air mass has sagged into the intermountain states to our east, the edge of which is being drawn into our area and providing for our relatively cold temperatures.

The current setup looks good for a minor lowland snow event; models have a couple of inches falling Sunday evening into the Seattle metro area. 

  

The Long Range: After light convergence showers end on Monday, Tuesday will bring a dry and cool day. Light snow showers start up again Wednesday, with a warm front potentially bringing rising freezing levels and moderate to heavy snow and rain Thursday and Friday. This will be one to watch as the week progresses.

24hr Precipitation ending at 4am: Today 24hr water:  .25-.5    Snow: 4-6” Tomorrow’s 24hr water:  .25    Snow: 2-4” Trend and Timing: Light snow beginning Sunday afternoon and continuing thru Monday.

24hr temperature ending at 4am:  Low: 6 High: 16 Snow level: 500 Trend and Timing:    Cold temps will continue Sunday and Monday.

24hr Winds (mph) ending at 4am: Base: Variable, then W 5-10 Ridge Top: NE, then W 10-20 Trend and Timing: Sunday morning will be calm with winds shifting to westerly in the afternoon and early Monday morning.     DV