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Pre‑Monsoon Storms Break Heatwave in Northwest India as East U.S. Moves Into Multi‑Day Wet, Cool Pattern

A western disturbance is bringing thunderstorms, hail and strong gusts to Delhi‑NCR while tropical moisture and a blocking jet are producing several days of heavy rain and gusty winds across parts of the eastern United States.

Overview

  • Delhi‑NCR experienced IMD‑warned thunderstorms on Thursday with orange and red nowcasts in place for districts that face lightning, isolated hail and gusts commonly of 60–80 km/h and pockets reaching about 100 km/h.
  • The IMD forecasts a sharp fall in daytime highs of about 5–8°C, with isolated 10°C drops across northwest India through May 30 and continued short‑term warnings for squalls and hail in Punjab, Haryana, Uttar Pradesh and adjacent areas.
  • Central and South Florida forecasters say tropical moisture will produce a multi‑day wet regime with model guidance showing broadly 3–5 inches for many east‑metro areas, daily afternoon/evening storms and a localized flood risk where storms train over the same spot.
  • South Florida coastal counties are expected to see typical sea‑breeze driven storms with most areas seeing 1.0–2.5 inches and isolated 3+ inch totals while thunderstorms could bring frequent lightning and gusts of 40–50 mph.
  • The Northeast is entering a cooler, unsettled stretch caused by an omega‑style jet pattern that will bring steady rain and coastal gusts that could top 40–50 mph on Saturday while Oklahoma faces only hit‑and‑miss showers with lightning and brief heavy downpours over the next 24–36 hours.