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2w ago

Severe Storms Threaten Ohio Valley Through Northeast With Widespread Wind and Flood Risk

A strong cold front moving into very moist, unstable air with strong wind shear is driving storms that will rapidly organize into wind‑driven clusters producing heavy rain.

Advisories have been issued for southern Connecticut and southeastern New York as multiple rounds of showers and storms are expected through Tuesday evening, according to the National Weather Service.
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Overview

  • Multiple SPC severe and tornado watches are active across the Ohio Valley, Mid‑Atlantic and Northeast, placing tens of millions of people under alerts on Tuesday, July 21.
  • Forecasters say damaging straight‑line wind gusts are the primary short‑term hazard, with gusts commonly 55–70+ mph and locally stronger winds possible where storms form bowing lines.
  • The Weather Prediction Center warns of repeated heavy‑rain bands that could produce training storms and flash flooding, with localized totals of 2–4 inches likely and isolated 6‑inch amounts possible in parts of the Mid‑Atlantic.
  • Meteorologists expect an initial mix of supercells capable of hail and brief tornadoes to rapidly upscale into linear or mesoscale convective systems, and a supercell in northern New Jersey has already produced brief tornado reports.
  • Storms are expected to affect major I‑95 corridor cities during the evening commute and into the night, and local NWS offices urge people to follow watches, warnings and flood advisories and avoid flooded roads.