Note: MDR refers to the Main Development Region for tropical storms.
Joe D’Aleo provides the explanation (H/T iceagenow) Then the Rains Came
It has been a changeable and at times extreme spring and summer. The cold and snow of March gave way to a cold April and some very chilly days well into the spring. Warmth with some very hot days followed in the early to mid summer. Then the rains came with strong thunderstorms. The wet August spell put an end to a borderline drought spell the last few years. It became very muggy, keeping nighttime temperatures up and air conditioners on.
The changes all have to do with the wind direction. The jet stream brought chilly air masses (and snow) into eastern Canada even into June. The winds around these cool air masses turn to the northeast here in New England coming in off cool land and water…
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