The chaotic nature of those precipitation features means if you are looking for a precise forecast of when and how much it is going to rain or snow over the next couple of days, you've come to the wrong place.
Let's start with perhaps the easy part: Today. A combination of instability, strong flow, and vertical wind shear means we will see some showers and thunderstorms this afternoon. The NAM forecast sounding for 2200 UTC (4 PM MDT) shows 320 Joules/kg of surface Convective Available Potential Energy (CAPE), a measure of how much energy a surface parcel of air would gain if it were lifted vertically through the atmosphere. Locally, values may be higher. Although such CAPE values are pretty pathetic for those looking for midwest-type severe storms, but are enough to make things interesting for Utahns. Strong flow and vertical shear is also indicated in the wind profile.
After today, the pattern might best be described as unsettled, which is a nice way of saying there will be precipitation, but where, when, and how much is unclear. Snow levels will fall overnight and probably be near bench level early tomorrow morning.
The now somewhat old 0300 UTC initialized SHREF shows a mean of about 1 inch of water total at Alta-Collins by 0000 UTC (6 PM MDT) tomorrow afternoon, but the range is colossal, spanning from about 0.1 to 2 inches.
Stuff that falls today will likely be of the wet, high-density variety at high elevations, possibly including some big graupel or hail. A garbage bag might be required at times, especially at mid and lower elevations, which will probably see rain that could turn temporarily frozen precipitation of a "variety of forms" during periods with higher precipitation rates. Snow levels and densities will drop later tonight.
A reasonable guess for Alta-Collins would be 7-14 inches from today through 6 PM tomorrow, with more possible if they are lucky enough to get a pounding from one or more of these precipitation features. Note that I use the scientific term "guess." Expect the snow to come in fits and starts at times.
Welcome to spring!