NASCAR knew that rain was in the forecast for the entire weekend before cars got on track for opening Sprint Cup Series practice on Friday. The session started 19 minutes behind the scheduled time due to fog.
Fog remained a factor for what turned into be just a 20 minute practice when rain came and halted cars from working on qualifying setup. 28 cars participated in practice, so if qualifying is rained out in the afternoon the starting lineup will be set by owner standings.
Carl Edwards posted the fastest single lap speed at 179.802 mph, which was over one mph faster than Kevin Harvick, who recorded the second fastest lap. If rain cancels qualifying, the No. 4 Chevrolet would start from the pole on Sunday.
Last year's pole-sitter for this event, Kurt Busch was third on the leader board at 178.649 mph. Paul Menard was fourth at 178.250 mph and defending Cup Series champion Kyle Busch rounded out the top five.
Jimmie Johnson, Casey Mears, Joey Logano, Greg Bffle and Tony Stewart rounded out the top 10.
Three drivers were tied for most laps ran in the practice session at seven. Cup Series rookie Chris Buescher led the way in that category at 23rd. Michael Annett and Brian Scott also completed seven laps and were the two slowest cars on one lap speed.
Notable drivers who didn't complete a lap were August winner, Matt Kenseth, Ryan Newman and Austin Dillon.
Qualifying is set to role at 4:15 p.m. ET if rain moves out of the Pocono Mountains.