Just got an INR message from a buyer in Florida. Went to look up the tracking on USPS.com and they are showing this on the site:
Severe Weather Impacting Delivery
Weather events in the South, Southeast, and Midwest U.S. are impacting the processing, transportation, and delivery of mail and packages. Please allow additional time for final delivery of your item.
I copied the above notice in my reply to the buyer and asked them to give it another day or two. Tracking showed their package is still in transit but arriving late.