With flow out of the NW, most of us think about Salt Lake County being in the DLE cross hairs, but in this instance, the band initiated so far west that it impacted Tooele County. Why there instead of near the mid-lake axis remains to be seen, but we can add the location of band initiation to the list of issues limiting our ability to forecast lake-effect location.
Further, NW flow is supposed to be good for the Cottonwood Canyons, but CLN has only received about 0.23" of SWE since midnight, which is barely a dusting by their standards. I suspect that the SWE near campus was equal or greater than that (note that I don't trust the 0.06" reported by WBB).
Conventional wisdom can only get you so far with non-linear lake-land-atmosphere interactions.