After temperatures in the 60s and 70s up and down the Eastern Seaboard on Thursday, many areas will be 20 to 30 degrees colder as we wrap up the workweek on Friday.
The reason for the cooler temperatures is a sharp dip in the jet stream that is allowing plenty of cold Canadian air to push across the central and eastern U.S. in the wake of a cold front.
Much of the Midwest and Northeast woke up to freezing temperatures Friday and will see the same Saturday morning. Freeze Warnings were posted early Friday morning across North Texas over to southwestern Arkansas and northwestern Louisiana. A majority of the locations within the warning have yet to drop below freezing this fall.
A brief warmup is expected Saturday and Sunday before another strong cold front drops temperatures back to 10 to 25 degrees below average. Freezing temperatures will be possible as far south as northern Florida by early next week.
Meanwhile, in the Rockies and High Plains, temperatures were well above average Friday morning. Cheyenne, Wyoming, was 33 degrees warmer than it was 24 hours prior. Compare that to Tupelo, Mississippi, which was 31 degrees colder than Thursday morning.