Frost Advisory issued December 01 at 2:59AM PST until December 01 at 8:00AM PST by NWS

...FROST ADVISORY THROUGH EARLY THIS MORNING FOR PORTIONS OF THE INLAND VALLEYS AND LOWER DESERTS... .A COOL AIRMASS...CLEAR SKIES...AND LIGHT WINDS WILL RESULT IN TEMPERATURES FALLING INTO THE LOWER TO MID 30S EARLY THIS MORNING IN PORTIONS OF THE INLAND VALLEYS AND LOWER DESERTS WITH PATCHY FROST.

from Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service http://ift.tt/1N15hgC