Late May Soaker?

Forecasts for this weekend, especially Saturday night and Sunday, are looking good.  It appears rain is likely, and we've reached the time of year where every storm and every drop should be appreciated.  

Although we may get get some rain today or Saturday in the form of showers and thunderstorms, the best chance for a soaker is Saturday night and Sunday when the upper-level trough that is currently spinning to our west over Nevada finally decides to head across northern Utah.  The GFS forecast valid 1200 UTC (0600 MDT) Sunday shows the trough with widespread precipitation over much of northern Utah.  

The storm will be cold enough for upper-elevation snow.  GFS forecast snowfall for Saturday night and Sunday totals about 10 inches at Alta-Collins.  The downscaled NAEFS has a fairly large range for Alta-Collins, but the mean for the period from 0000 UTC 23 May (1800 MDT Saturday) to 0600 UTC 25 May (0000 MDT Monday) is about 9 inches.  

For the valley, we'll see rain.  Let's hope the storm delivers.  The flowers will appreciate it.