ST. LOUIS —
The National Weather Service issued a flash flood watch from Arkansas northeastward through parts of Missouri, Illinois, Indiana and Ohio, with up to 4 inches of rain projected. With falling temperatures, some of that could be freezing rain by Saturday night in the St. Louis area, weather service meteorologist Jon Carney said.
Forecasters said thunderstorms would likely develop in the South. The area that was most in peril stretched from central and northeastern Texas through Louisiana, Mississippi, Arkansas and southeast Missouri, where 80 mph wind gusts and flash flooding were possible.
By Sunday night, the storm systems will be hammering the East Coast. Some New England and mid-Atlantic states could see rare winter thunderstorms.
Tom Kines, an AccuWeather meteorologist, said the unsettled weather comes as a cold front in the northern U.S. clashes with unusually warm and humid air coming up from the South. He said that warm air will lead to record or near-record highs in many places over the next day or two. Nashville could reach into the 70s on Saturday. New York City could approach 70 degrees on Sunday.
The warm air, though, will bring plenty of trouble to some areas.
“I think there’s a high likelihood there will be severe storms with hail and damaging wind” in parts of the South, Kines said. “Whether or not there’s tornadoes, that’s tough to say, but I will say the conditions are right.”
Tornadoes are far more common in the spring and summer, but not unheard of in the winter. A tornado outbreak on Christmas Day 2012 reached from northeastern Texas through central Alabama — one twister hit Mobile, Ala. A tornado on Dec. 16, 2000, killed 11 people in Tuscaloosa, Ala.
In Vinita, Okla., on Friday, customers lined for gas at Diamond Rio convenience store in preparation for the snow and ice the region was expected to get.