Did you notice the altocumulus clouds this morning? These almost look like a mackerel cloud structure.
The Salt Lake Weather Office's forecast discussion mentions the passing of a cold front today. Typically, when you hear "cold front," you would expect colder temperatures today. In the case of today, the opposite is true--we'll get a little warmer:
EXPECT THE INCREASED MIXING WITH THE FRONT COULD ACTUALLY SEND VALLEY TEMPS A LITTLE HIGHER THAN YESTERDAY.Yesterday our night-time inversion layer didn't mix out completely. If the cold front stirs the air up sufficiently the inversion will go away and the air from above will mix to the surface, compress and warm.
Below is the sounding from yesterday evening. You can tell it's not summer anymore because of the shallow mixed layer at the surface. The blue marking shows my guess at what the mixed layer will look like today. I'll have to check tonight to see if this plays out.