Moisture is already streaming into the area today and priming the atmosphere for the deluge.  Today we will see occasional showers, particularly in the mountains.  Snow levels today should be around 7000 feet so not as much of an issue.  However, tomorrow, the main river of moisture arrives and this will provide an increase in the coverage and intensity of precipitation.  It will also moisten the airmass further and raise snow levels up to 9000 feet during the day tomorrow.  It's going to be sloppy with rain likely at the base elevations of most resorts on Thursday.  Maybe not the best day for skiing.  However, if you do have the proper water-shedding gear, you might fight empty mountains with dense cream at the top....  

Precip continues Thursday night into early Friday.  We will see gradual cooling during this period and snow levels should drop down below 8000 feet.  Most resort elevations should switch over to dense snow.  Friday could actually be a decent day to be on the mountain, although the new snow will be of the extremely wet and heavy variety.  

As for totals between now and Friday...

You can see QPF on the left has come down a bit from the extreme amounts shown in previous days. Still, nearly two inches of liquid which could equate to 10-18" of dense snow above 9000 feet.  Base elevations will see significantly less with only 3-8" of slop.  

In map form, you can see the widespread areas of heavy precip likely between now and Saturday: 

When you look at snow only, you can see that it is confined to just the highest elevations: 

Models now indicate a break in the action from midday Friday thru at least Saturday night.  Then sometime on Sunday, the core of the system pushes into the region.  This should slowly work its way thru the area late Sunday and Monday.  Still questions about this piece of energy's strength, but we could see some fluffier powder to start the work week.  

Still not much agreement beyond next Tuesday.  The GFS builds a ridge off the west coast far enough that energy can drop down the east side of the ridge and bring us chances for storms.  The EC is more inland with the ridge and keeps us dry for the most part.  Overall, I think a break in the action to end March and begin April is the most likely scenario.  

Evan | OpenSnow