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Memorial Day Weekend to Split U.S. Weather: Cool, Foggy Bay Area and Widespread Rain East

The pattern will disrupt outdoor plans from San Francisco beaches to race weekend in Indianapolis.

Overview

  • Forecasters on Friday say the Bay Area will cool as onshore flow rebuilds and a coastal eddy could form Saturday morning to enhance morning fog in some bays with a possible repeat Sunday.
  • Central Indiana faces growing rain chances for Carb Day with forecasters citing about a 60% chance by early afternoon Friday and additional shower risk Sunday for the Indianapolis 500.
  • New England and the Mid‑Atlantic are forecast an impact day Sunday with widespread soaking rain generally around a half‑inch to an inch and raw, breezy conditions that could be locally heavier.
  • Local watches issued late Thursday and Friday include a flood watch for parts of Kentucky and Jefferson County, Indiana through 8 a.m. Saturday and a marginal severe‑storm risk for parts of east Mississippi.
  • The weekend highlights a sharp coast‑to‑interior contrast driven by an upper‑level trough and Gulf moisture, with many inland areas expected to rebound to warmer, drier conditions after the holiday.