Another Week Begins with Severe Weather

A brand new week at Greg’s Weather Center in South Plainfield, NJ is about to begin with another round of severe weather.

Flood Watch in Effect from Sunday Night through Monday Night in 13 NJ Counties

Watch time-lapse footage of the clouds gathering ahead of the approaching storm on Sunday afternoon at Greg’s Weather Center in South Plainfield, NJ.

SOUTH PLAINFIELD, NJ – After a few days of mostly tranquil weather, another week begins with severe weather around the Garden State. The National Weather Service office in Mount Holly, New Jersey has issued a Flood Watch for thirteen counties in New Jersey as well as portions of Delaware and Eastern Pennsylvania starting at 8:00 PM on Sunday. The watch will remain in effect through Monday night.

An approaching storm system will produce several waves of thunderstorms over the next 24 to 30 hours. These storms could unleash rainfall rates between one and three inches per hour. Rainfall totals will likely fall within the one to two inch range. However, local amounts could run as high as three to five inches.

Watch time-lapse footage of the skies over Greg’s Weather Center in South Plainfield, NJ as a severe thunderstorm that produced a microburst in another part of town developed on July 27th.

The month of July 2026 was the wettest to date this year at Greg’s Weather Center in South Plainfield, NJ. A total of 6.46 inches fell at GWC in July, which places the month among the top fifteen wettest months of all time in Northwestern Middlesex County. Last week’s storm catapulted the month’s rainfall from 22nd on the list to 13th on the wettest of all time. The turbulent weather on Monday and Tuesday spared GWC for the most part, but still produced 1.22 inches.

July is usually one of the wettest months of the year at GWC and the rest of the Garden State. Last July ranks seventh on the all time list of wettest months in South Plainfield with 8.27 inches. July 2023 ranks 18th all-time. August is another wet month for Northwestern Middlesex County. The wettest month of all time at GWC was August 2011 with 15.34 inches of rain. About a third of that month’s rainfall resulted from Hurricane Irene. August 2024 and August 2023 rank 15th and 20th all-time at GWC.

Watch GoPro footage of one of the severe thunderstorms during its peak intensity at Greg’s Weather Center in South Plainfield, NJ on July 18th.

Looking at the latest radar (6:33 PM EDT on August 2, 2026) from Fort Dix in Ocean County, NJ, you will see showers that passed through the region earlier and headed to Northern New Jersey and Southeastern New York. The more substantial rainfall is slowly creeping up from the south in Virginia, Maryland, and Delaware and west from Central Pennsylvania. The barometer has been gradually falling at 29.79 inches. Over the past 10 hours or so, the pressure has only dropped 0.13 of an inch or 4.3 millibars at GWC.

According to the NWS office in Mounty Holly, the rain will likely begin tonight with a chance of showers and thunderstorms increasing throughout the evening from 40 to 80 percent. The rain could be heavy at times. Anywhere from a quarter to a half of an inch is possible by Monday morning. The rain will continue throughout Monday with more showers and thunderstorms during the day. The chance of rain is 90 percent with rainfall amounts ranging from three quarters of an inch to an inch. The rainfall should begin to taper off by Monday evening.

The forecast for the rest of the week indicates a chance for more rain on Wednesday and Thursday. Chance of rain on Wednesday is currently 50 percent while Thursday afternoon shows a 50 percent probability for storms. Thursday night’s chance for storms is running a little lower at 40 percent. Rainfall for the year at Greg’s Weather Center is still running behind the average at 19.49 inches. A little more than a third (33.5%) of that year to date rainfall occurred during the month of July.

Watch footage of a third round of thunderstorms that produced heavy rain, frequent and vivid lightning, and loud thunder at Greg’s Weather Center in South Plainfield, NJ on July 18th.