Severe Thunderstorm and Flood Watches Sweep Mid‑Atlantic on July 28, 2026

severe thunderstorm watch flash flood warning tornado watch Maryland Mid‑Atlantic

The National Weather Service issued a series of Severe Thunderstorm Watches for Maryland, northern Virginia, Washington, D.C., and large parts of Pennsylvania, Delaware and New Jersey on July 28, 2026. The watches highlight damaging wind gusts of 60‑70 mph, large hail up to one inch and the possibility of isolated tornadoes. A Flood Watch was also placed on portions of the region through late Tuesday night, and a specific Tornado Watch (Watch 529) covered St. Mary’s, Charles and Calvert counties in Southern Maryland until 10 p.m.

A Flash Flood Warning was issued for Essex County, New Jersey, lasting until 6:45 p.m. Temperatures were expected to range from the lower 70s in higher terrain to the upper 80s elsewhere. Authorities advised residents to stay weather‑aware, avoid flooded roadways, secure loose outdoor items, and seek interior shelter if a warning is issued.

Entities: Carolinas · Delaware · Essex County · Maryland · National Weather Service · New Jersey · Pennsylvania · Schuylkill County · Storm Prediction Center

Claims

What the coverage asserts, and how well corroborated each claim is across sources.

[○ 1 SOURCE] The Severe Thunderstorm Watch covers 15 Maryland counties and Baltimore City. (National Weather Service)
[● 3 SOURCES] The outlook warns of damaging wind gusts, large hail, heavy rainfall and an isolated tornado. (National Weather Service)
[○ 1 SOURCE] Residents were urged to stay weather‑aware, secure outdoor objects and avoid flooded roadways. (Weather alerts)
[○ 1 SOURCE] High temperatures were expected to range from the lower 70s in mountainous areas to the upper 80s elsewhere. (National Weather Service forecast)
[○ 1 SOURCE] A Flood Watch was issued for portions of the region through late Tuesday night. (National Weather Service)
[○ 1 SOURCE] A Severe Thunderstorm Watch was issued for St. Mary’s, Charles and Calvert counties until 10 p.m. on Tuesday, July 28, 2026. (National Weather Service)
[○ 1 SOURCE] High temperatures are expected to be in the lower 70s in the mountains and upper 80s across lower elevations before storms develop. (National Weather Service forecasts)
[○ 1 SOURCE] A Severe Thunderstorm Watch is in effect for St. Mary’s, Charles and Calvert counties until 10 p.m. Tuesday, July 28, 2026. (National Weather Service)
[● 3 SOURCES] Strong to severe thunderstorms are expected across Maryland, Virginia, West Virginia and the District of Columbia on Tuesday afternoon and evening. (National Weather Service forecasts)
[○ 1 SOURCE] A Flood Watch has been issued for portions of the region through late Tuesday night. (National Weather Service)
[○ 1 SOURCE] The watch covers 15 Maryland counties and Baltimore City. (National Weather Service)
[● 3 SOURCES] Potential hazards include damaging wind gusts, large hail, isolated tornado and flash flooding. (National Weather Service)