Heat wave focus shifts from the Mid-Atlantic to portions of theSoutheast/Southern Plains by Monday......There's a Slight Risk of Severe Thunderstorms over portions of theNorthern High Plains......Severe storms for portions of the Upper Midwest on Monday......Monsoon-like conditions persist for the Southwest...A broad and well entrenched upper ridge centered over the Southern HighPlains/Southwest will eject shortwave energy across the northern tierstates through the early work week. A low pres...