A very slow moving and strong cold front will march towards New Jersey by this evening with the threat for showers and thunderstorms. Once the cold front passage exits tomorrow, a very comfortable air mass will return just in time for the weekend.
A cold front will slowly approach the coast with broken to overcast clouds with isolated to widely scattered showers through this afternoon. Winds will be from the southwest at 5 to 15 mph. Temperatures will rise into the lower to mid 80's along the coast and mid to upper 80's along the Delaware River.
The cold front will slowly move through New Jersey tonight on through tomorrow morning with showers and strong to isolated severe thunderstorms. The strongest thunderstorms are expected tonight between 9 PM through 1 AM. These thunderstorms will be capable of very heavy downpours, frequent lightning, small hail, and wind gusts over 40 mph. The thunderstorms will be capable of high rainfall rates leading to localized flash flooding and urban flooding. Showers will linger into the morning hours. Winds will veer to the west at 5 to 10 mph. Temperatures will fall into the upper 60's to lower 70's. Humid conditions will linger into the morning hours.
High pressure will build into the Garden State from the St. Lawrence River Valley tomorrow afternoon and will remain in place through Friday with clear skies to scattered clouds. Winds will veer to the north at 5 to 15 mph. High temperatures on Thursday will range from the lower to mid 80's along the coast and mid to upper 80's over the Delaware River Valley. Temperatures on Friday morning will range from the mid to upper 60's for lows. High temperatures on Friday will rise into the upper 70's to lower 80's along the coast and lower to mid 80's over the Delaware River Valley.
A series of weak disturbances will keep the threat for isolated showers in the forecast Saturday through Tuesday. However, most locations can expected clear skies to scattered cloud cover with high pressure anchored over the coastal waters of New England. Low temperatures will range from the mid to upper 60's. High temperatures will range from the upper 70's to lower 80's along the coast and mid to upper 80's over the Delaware River Valley.
The preliminary July 4th weekend forecast looks to be unsettled with a threat for showers and cooler with high temperatures falling back into the mid to upper 70's for highs and upper 50's to lower 60's for lows.