Check out the Meteogram from the Dugway I-80 site (DPG 17). The temperature fell like a stone with frontal passage from 53F to 42F in 5 minutes (that's the resolution of the data) and to 38F in 10 min.
Wind? Ya Betcha. Gust to 63 mph immediately after frontal passage.
Some lowland gusts over 70 mph reported so far today to MesoWest (Note: Subject to quality control verification):
West Salt Flat: 70 mph
Sherwood Hills: 71 mph
US-6 Eureka: 80 mph
Orem: 71 mph
The peak gust thus far at KSLC is 56 mph and at the University of Utah is 49 mph.