High pressure over southeastern Canada this morning will be a key factor in influencing New Jersey's weather through next week. As the high pressure shifts from southeastern Canada to the New England coastal waters this weekend and then to the western Atlantic, winds at the surface and aloft will veering to the southwest, sending a hot and humid air mass into New Jersey by the start of next week.
Today through Sunday, high pressure will shift towards the coastal waters of New England leading to clear skies to scattered cloud cover. An extremely isolated shower is possible in the afternoon hours, especially over northwestern New Jersey, however most locations will remain dry. Winds will veer from the north to northeast at 5 to 10 mph by tomorrow morning and to the southeast at 5 to 10 mph by Sunday afternoon. A Polar/Maritime air mass will be in place this weekend leading to very low humidity with dew points only in the 50's. Temperatures will range from the upper 50's to lower 60's for lows and lower to mid 80's for highs. Overall, another pleasant weekend is on the way!
By Monday, the high pressure system will shift to a position due east of New Jersey which will lead to winds veering from the southeast on Sunday night to the southwest at the surface and aloft. The high pressure system will remain in this position through Wednesday, transporting a hot and humid air mass into New Jersey. With a more tropical air mass in place, isolated to widely scattered showers and thunderstorms will be a threat in the afternoon and evening hours. Morning fog and haze will also be a concern, reducing visibility. Low temperatures will range from the upper 60's to lower 70's throughout the state. High temperatures mid 80's along the coast and upper 80's to lower 90's throughout the rest of New Jersey. The higher levels of humidity will make temperatures fell like the mid to upper 90's.
The hazy, hot, and humid conditions will come to an end on Wednesday night into Thursday morning with a passage of a cold front which will produce widespread showers and thunderstorms. Once the cold front clears the coast on Thursday morning, Canadian high pressure will take hold and remain in control through the Fourth of July weekend! Under the influence of this high pressure system, humidity will crash with dew points back in the 50's. Skies will be clear for the most part with only a few scattered clouds. Temperatures will range from the upper 50's to lower 60's for lows and lower to mid 80's for highs. Overall, a very comfortable and pleasant Fourth of July weekend looks to be setting up!