Overview
- High pressure is delivering cold mornings, with frost advisories and a freeze watch in parts of Pennsylvania before a brief warmup Friday into Saturday.
- Rain and thunderstorms are expected to develop late Saturday into Sunday across multiple regions, after a mainly warm, breezy, and dry Saturday daytime period.
- Localized heavy rainfall is possible, with forecasters in Metro Detroit signaling at least an inch or more by Sunday as steadier bands move through.
- Winds will strengthen with the front, with widespread gusts of 30–40 mph and localized 40–50 mph gusts reported as possible during Sunday’s passage.
- The Storm Prediction Center lists a Marginal Risk for strong storms in parts of the region, and forecasters expect cooler, drier air after the front, with the Caribbean under medium‑range monitoring for possible late‑October tropical development as Lorenzo weakens offshore.