Climate Impact Report: U.S. medium-range forecast trends cooler, but heat returns Great plains days 16-20.

Highlight: ERCOT/Mid-south and West Coast heat. Cooler elsewhere. Great Plains rewarms days 16-20. Charts of the day: The upper air pattern. Discussion: ECM ENS days 1-5/6-10 upper air forecast identifies the potent subtropical ridge over Texas/Louisiana this week expanding westward in the 6-10-day period. In the short-term, the ridge inspires the East-central U.S. heat. In…