The photo below was taken from the Gobblers Knob summit at about 10 AM this morning looking east toward the Uintas. As is often the case, one can see the first cumulus clouds of the day forming over the Uintas. Often, these clouds grow in depth, producing showers or thunderstorms later in the day.
I don't know of a study that has specifically examined the influence of the Uintas on convective cloud initiation and evolution, as well as growth into thunderstorms, but I'll speculate here on one of the reasons why the Uintas are so active: their scale. They are quite high and broad with large expanses of lower elevation terrain to the north and south of their west-to-east oriented spine. This favors the development of a robust "mountain-plain circulation" which during the day features upslope flow with convergence over the Uintas, as depicted schematically above. This convergence leads to ascent, which not only helps to trigger cumulus clouds, but also creates a moist environment in which those clouds are not as easily destroyed as they mix with the ambient air through a process known as entrainment.
The "smoothness" of the Uintas might also help since the large-scale mountain-plain circulation is not strongly disrupted by deep, incised topography, although even in the Alps, the influence of the mountain-plain circulation is often apparent.
Constrasts between the evolution of convection today over the Wasatch and Uintas are apparent in MODIS imagery from NASA's Terra and Aqua satellites. The Terra overpass at approximately 11:30 MDT shows extensive cumulus clouds over the Uintas. In contrast, cumulus over the Wasatch was confined primarily to the central Wasatch, especially the high terrain between Snyderville Basin and Alta.
Data from lightningmaps.org shows numerous lightning strikes today in the Uintas.