Cooler, Wetter, Stormier ...Its coming

The jetstream flow is about to shake up. Strong upper disturbances will roll across the upper Midwest to Carolinas beginning midweek, being forced south from their normal location. A very active Pacific flow will send strong waves of low pressure almost on a daily basis beginning midweek, and this pattern looks to lock in for a while. For areas of the South and East that need rain (and have been missed), I foresee huge masses of thunderstorms, large enough to encompass entire states as they roll east and southeast. As time wears on toward next weekend, the central Plains should be the immenating point, and again daily masses of storms will roll due east toward the Southeast and MidAtlantic.  These won't be your typical afternoon "pop up" kind of storms, instead they will be synoptically driven and can occur morning, noon and midnight. Unfortunately as with any storms in the Summer, some will become severe and produce hail, vivid and dangerous lightning and high winds. So be on guard for a period of very active weather coming up for a large region of the country, especially around the Midwest to lower Ohio and Tennessee Valleys to the Carolinas.