Another Cold Night

Cold Canadian high pressure dominates the weather across about on third of the nation this evening. The core of the high will move out of Minnesota this evening, across Wisconsin tonight, and be located over Lower Michigan by early Friday morning. This area of high pressure was responsible for some patchy frost early on Thursday morning. There would be more frost tonight were it not for some cloud cover moving in from the west, and sliding up over the high pressure. These clouds should prevent enough heat from escaping out to space tonight to prevent any frost from forming.  It will still be quite cold, however, with the temperature dropping to the upper 30's or around 40 degrees by 6 am on Friday morning. These clouds represent warmer air moving in from the west, and it appears as if it will be a mostly cloudy day on Friday. The high temperature will be in the upper 50's.  A gradual warming trend will set in over the weekend.