Tornado Delaware: Watch covers Philly, New Castle County
A Tornado Watch covered much of the Philadelphia region Tuesday, including tornado Delaware risks for New Castle County, as severe storms brought heavy rain, damaging winds, and multiple tornado warnings. At least three warnings were issued before the watch ended at 9 p.m., with a First Alert lasting until midnight.
Key Takeaways
- A Tornado Watch blanketed much of the Philly region across Pennsylvania, New Jersey, and Delaware on Tuesday, July 28, 2026.
- Tornado warnings included New Castle County, Delaware, plus Salem and Gloucester counties in New Jersey and Delaware and Chester counties in Pennsylvania.
- The National Weather Service Tornado Watch was cancelled at 9 p.m.; a First Alert remained in effect until midnight.
- Flash flooding, damaging winds, downed trees and power lines, and multi-hour flight delays at Philadelphia International Airport were reported.
What happened with the tornado Delaware alerts?
Local weather desks reported a Tornado Watch for much of the Philadelphia region Tuesday evening as a line of powerful storms moved through Pennsylvania, New Jersey, and Delaware. According to NBC10 Philadelphia, the National Weather Service issued a regional Tornado Watch that was later cancelled at 9 p.m., after at least three tornado warnings during the afternoon and evening.
A Tornado Warning covered New Castle County in Delaware along with Salem and Gloucester counties in New Jersey and Delaware County in Pennsylvania before that warning expired. Separate warnings also targeted Chester County, Pennsylvania, and portions of New Castle and Chester counties with an expiration near 6:45 p.m., FOX 29 reported.
A warning means a tornado has been spotted or indicated on radar. A watch means conditions are favorable for tornadoes to develop.
Why did this storm threat matter for the Philly region?
Forecasters flagged Tuesday as the most active day of the week. Tropical humidity raised the risk of flooding downpours, while a slightly elevated severe-weather threat south of the city included damaging wind gusts and a brief tornado, 6abc AccuWeather coverage noted. The Interstate 95 corridor and points south had the best chance of the most severe storms.
A flood watch already covered most of the Philadelphia area, including parts of South Jersey and Delaware. Flash Flood Warnings and Severe Thunderstorm Warnings followed Tuesday night. Streets flooded in Reading, Pennsylvania, after afternoon storms. Damaging winds downed trees and power lines, and ponding water slowed traffic. Philadelphia International Airport flights were delayed more than two hours because of thunderstorms.
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What should residents do during a tornado warning?
6abc advised people under a tornado warning to act immediately: move to a storm shelter if available, or go to a basement or an interior room away from windows, ideally with reinforced walls. Stay alert for updated watches and warnings until storms clear and overnight First Alert coverage ends.
Severe weather alerts remained active across the region Tuesday as successive rounds of rain and thunderstorms moved through. Check official National Weather Service products and local live radar before travel.