Overview
- Dangerous heat remains in place across much of the country with Heat Advisories and local Extreme Heat Warnings in effect and heat‑index values commonly in the 100–115°F range.
- Thunderstorms are increasing today and through the weekend as an approaching front and low pressure tap Gulf and monsoonal moisture and produce scattered to numerous downpours.
- A flood watch covers much of the Tri‑State area with forecasters warning of heavy rain, flash flooding and a small tornado risk, and hundreds of NYC flights were canceled or delayed during the system's arrival.
- The greatest concentrated severe‑storm threat is along the I‑95 corridor and the Washington, D.C. region where damaging wind gusts, hail and isolated tornadoes are possible during afternoon and evening storms.
- The larger pattern shift that moved the heat dome westward will bring pockets of cooler, drier air to some Northeast and Great Lakes areas by Sunday–Monday while desert and Southwest locations stay extremely hot with daily storm chances.