Fall Arrives With Rain and Cooler Pittsburgh Temps

Pittsburgh and Western Pennsylvania are experiencing cooler temperatures and light rain as fall officially begins. The Monongahela River at Grays Landing is forecast to reach its action stage tonight due to rising water levels, though the broader flash flood risk has subsided. A flood watch remains in effect for areas south of Allegheny County until 8 a.m. Wednesday. Residents are cautioned to avoid driving through flooded roads. Today's forecast includes overcast skies, breezy northeast winds, and highs near 60 degrees, with scattered light rain and drizzle expected to conclude by Wednesday morning. The Autumnal Equinox will occur tonight at 8:05 p.m., signifying the astronomical start of autumn, with equal day and night hours to follow later in the week. Wednesday is expected to bring partly sunny skies and highs in the low 60s, with a dry stretch anticipated through the upcoming weekend, featuring highs reaching into the 70s by Saturday and Sunday.