Mid‑Atlantic Frost Advisories; Plains Storms Expected

A broad fall chill is settling across the Mid‑Atlantic as high pressure and clear skies drive overnight temperatures down, prompting Frost Advisories and Freeze Warnings for parts of Maryland and central Pennsylvania for early Saturday morning. People with frost‑sensitive plants are advised to bring them inside or cover them. The weekend will be generally crisp and mostly dry with daytime highs in the upper 50s to low 60s, though clouds increase Sunday and the first showers tied to a pattern change may arrive overnight. A southerly‑tracking storm in the Plains will produce widespread showers and storms Friday into Saturday — including locally heavy rain, small hail and thunder — followed by cooler, cloudier conditions. Metro Detroit and other Great Lakes areas expect lighter winds, less rain and steady cool highs in the 50s through next week with a quieter Halloween more likely, while Montreal should see mostly mild fall conditions despite occasional single‑digit readings.