What Happened?

After a week of single digit and below zero temps today showed us temps in the high 30's. Whatb happened and will it happen again tomorrow? I hat the subzero temps because of lung problems but today was a good day to be out and about. My friend and I drove 100 miles to Ankeny,Iowa and visited until about 9:00 tonight bafore we drove home again. It was a real nice ride except for one 7mile stretch with bumper to bumper traffic. It seems a semi went in the ditch and a dozen men were transferring the load to another truck. Traffic was down to one lane and backed up for 6 miles. That was a lot more than I needed to make my day complete.