Unseasonably Cold Air Invades Midwest, Tennessee Valley

A strong area of high pressure in the northern Plains is ushering inunseasonably cool Canadian air to the upper Midwest and Ohio Valley today, andby tonight several record lows will be in jeopardy as far south as theTennessee Valley. This fall-like chill is the result the jet stream plungingunusually far south for July and this pattern will hold through theweekend.Lows tonight will bottom out in the 50s from Nashville through southernMissouri, and temperatures will drop quickly through the 50s and into the 40sacross the Upper Midwest. Even the Deep South will not be able to escape theexceptionally cool weather. Places such as Hunstville, Ala., and Little Rock,Ark., will come close to, if not actually eclipsing the old record marks forSunday morning of 58 and 62 degrees respectively.