According to Horst...notsofast.
Last Thursday I speculated that a pattern change might bring the arrival of a persistently cooler weather beginning around October 1st. Today, I'm putting that pattern change on hold for at least another week or so. Why? A massive blocking pattern has since developed in the eastern Pacific and ridging in the western Atlantic now looks to hold on into the opening days of October. The bottom line: It may take until October 7 - 14th for the pattern change to fully reach the Eastern US.