A flash flood warning is in effect for Allegheny County until 10 a.m. Locations include: Pittsburgh, Penn Hills, Monroeville, Shaler Township, Plum, West Mifflin, Baldwin, Wilkinsburg, Munhall, North Versailles, Swissvale, O`hara Township, Forest Hills, Wilkins Township, Oakmont, Fox Chapel, Turtle Creek, North Braddock, Etna and Sharpsburg.

Any slow-moving storms will be capable of producing heavy rain in a short period, so be alert for quickly changing conditions.