After an unseasonably cool summer, the pattern flipped to a warmer regime during the month of September. That same warm pattern continues presently, but are changes brewing?
We note the PNA (Pacific North American pattern) is trending positive and this could help promote more of a sustained trough and associated cooler than normal pattern to wrap up October. Would it be enough to offset the very warm first half of October? Too early to tell. However, I will say that with the PNA trending positive, it does suggest we’ll be looking at more sustained chilly conditions, as opposed to the “in and out” flirtations of cool air as of late.
The GEFS suggests a trough sets up shop across the eastern part of the country for the back half of October.
