Websites for snow & flow data
The San Rafael is pretty much a snowmelt run. Nearby gaged streams are Ferron Ck. Muddy Ck. and the Price River which all show increasing flows. The USGS gage on the San Rafael near Castledale isn't reporting, but the downstream gage near Green River #09328500 shows declining flows, so the irrigators & powerplant are taking nearly all the water.
For realtime flow data, go to <http://waterdata.usgs.gov/nwis> and select Utah, then click on the appropriate dot on the map. Draw your own conclusions.
Pretty much the same drill for snowmelt info. Go to <www.wrc.nrcs.usda.gov/snotel> then click on Utah. There are 3-4 sites on the Wasatch Plateau. Click on a dot, then look at the Current Water Year column and select Snow-Water Equivalent Daily Graph. That will show you how much water's in the snowpack and how fast it's coming down.
I looked at a couple graphs and the melt is well underway.