The jet stream responsible for Iowa’s unseasonably warm November weather isn’t going to last long enough for weekend picnics. A cold front will come through the state Thursday night.
"Right now what we've seen in early November is the jet stream had been north of the state of Iowa, so that's allowed the warm air mass across the southern united States to move up," says Craig Cogil, a meteorologist at the National Weather Service in Des Moines. "What we're going to see when the front moves through is the jet stream is going to be moving further south. So it's going to allow colder air, that usually resides up in Canada, down into the state of Iowa."
Cogil predicts temperatures in the 50s for most of Iowa this weekend.