As anticipated, yesterday was a gorgeous day in the Uinta mountains with only a few shallow cumulus clouds evident along the Uinta crest as one looked east from the summit of Mount Watson.
As is often the case, the High Uintas served yesterday as the locus for cumulus cloud initiation. The broad, gradual slopes of the Uinta Mountain "massif" is ideal for the generation of upslope flows during the day. These upslope flows converge and cause rising motion near the Uinta crest, which contributes to the initiation of cumulus clouds, as shown schematically on yesterday's MODIS image below.
Of course, cumulus clouds and thunderstorms do occur off the Uinta crest. Yesterday simply provided a very clean example in which slope flows dominate the processes leading to cloud initiation.