There's a 50 percent chance of storms from 3 p.m. to 6 p.m. ET on Sunday, according to WTAE in Pittsburgh, and radar predictions indicate that the heaviest rain will fall around 4 p.m. The showers will likely be spotty, though, with intermittent sunshine between.

Play resumed around 5:40 p.m. after it was suspended just after 4 p.m. Sunday as torrential downpours made the course unplayable.

According to Weather.com, there's a better than 50 percent chance of rain through 5:15 p.m. in Oakmont before the percentages begin to drop precipitously to less than 15 percent by 7 p.m. Play should resume on time as long as there are no other delays.