Mid 80s might not be considered cool most times of the year, but Richmonders expect more during the summer. Walking outside the other day, it really hit me how unusual this summer weather has been. Sure, we’ve had some hot days, but even on those few occasions we haven’t eclipsed the mid-90s… a threshold that’s usually surpassed this time of year.
It’s not just the temperatures, but also the lack of appreciable humidity that would kick up the heat index. Dew points have frequently hovered around spring-like 50s levels.
Attribute it to an unusual southward dip in the jet stream over Southeastern Canada, anchored by a just as unusual upper-level low pressure system. This pattern has kept frontal boundaries chugging east in a pattern more reminiscent of spring or fall.
Noteworthy within this pattern was the large-scale storm system of this past Sunday, again pretty rare for the summer. Our neighbors in the Northeast have been even cooler, plus cloudier and much wetter.
Posted by Jim Duncan