An energetic upper-level pattern will bring a couple rounds of storms tothe central U.S. over the next few days. Tonight, moist return flowfollowing a warm front moving northward through the Plains and ahead of adryline over the High Plains will provide more than enough instability totrigger robust thunderstorm development over the Central Plains.Increasing upper-level winds will promote supercells with the threat oflarge hail and a few tornadoes. Storms are also expected to grow upscaleinto ...