WKBN Weather: Northeast Braces for Flash Flooding and Tornado Threats

The Northeast is in the crosshairs of a potent storm system Tuesday, July 21, 2026, prompting a First Alert Weather Day for tornado and flash flooding threats. A tornado watch stretches from Delaware to upstate New York, and multiple tornado warnings have already been issued in New Jersey. At least three tornadoes have been reported in Pennsylvania and New Jersey, according to ABC News.

Flash flooding is the primary concern along the Interstate 95 corridor from Philadelphia to Connecticut. Rainfall rates may briefly exceed 1 to 2 inches per hour in the heaviest storms, and damaging wind gusts up to 70 mph and large hail are possible. Flooded roadways have already been reported in Bergen County, New Jersey, and Westchester County, New York.

Air travel is severely disrupted, with over 2,000 flights canceled Tuesday. Airports in New York City, Philadelphia, and Washington, D.C., are seeing the biggest impacts, and ground stops have been issued at airports in New York City, D.C., Boston, and Baltimore. New York City Mayor Zohran Mamdani urged residents to “exercise caution,” advising them to go inside if there’s thunder, heavy rain, or strong winds, and to know their exits if living in a basement apartment.

For those tracking the storms in real time, WKBN weather radar and local alerts are essential tools. The weather radar shows the line of storms pushing east, and checking weather near me can help you stay ahead of the worst conditions.

First Alert Weather Day Details

In Connecticut, a Tornado Watch is in effect for Litchfield, Fairfield, and New Haven Counties until 9 p.m. A Flood Watch remains in effect until 2 a.m. for southwestern Connecticut. The storms are expected to diminish by midnight, but the threat of damaging winds and frequent lightning persists through the evening.

Wednesday will bring another First Alert Weather Day as a cold front moves through, triggering isolated afternoon storms that could be strong to severe. Morning showers will give way to cooler temperatures, lower humidity, and increasing sunshine during the afternoon.

Beautiful Weather Ahead

After the storms pass, the back half of the week looks much more pleasant. Thursday through Saturday are expected to feature mostly sunny skies, comfortable humidity levels, and temperatures ranging from the upper 70s to the mid-80s. Friday will be similar with a bright sky and highs in the 80s. The final weekend of July looks dry with pleasant humidity, though Saturday will be a little brighter than Sunday.

Looking ahead, the next chance for unsettled weather arrives later in the weekend and early next week. Spotty showers and thunderstorms are possible Sunday, with a better chance for more widespread storm activity on Monday as warmth and humidity begin to increase again. Monday starts dry with highs in the 80s, but clouds will increase in advance of rain and potentially storms on Tuesday.

Technical Discussion: What’s Driving the Storms

The severe weather is being fueled by a potent upper-level disturbance interacting with a warm, moist air mass. The combination of strong wind shear and instability is creating an environment favorable for rotating storms and tornadoes. The most active period is expected during the evening commute, when heavy rain and strong thunderstorms could cause ponding on roads, reduced visibility, and hazardous travel conditions.

For those in the affected areas, staying informed is key. The WFSB Weather App is available for iOS and Android, and the First Alert Weather Team is monitoring the situation closely. As the storms move out, the focus will shift to the beautiful stretch of weather that follows—a welcome relief after a day of severe threats.