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Daytona Beach, FL (Sports Network) - Inclement weather has again delayed the start of the Daytona 500.

Persistent rain on Sunday at Daytona International Speedway forced the first postponement in the 54-year history of NASCAR's biggest race. The start was rescheduled for noon (et) on Monday, but poor conditions remain in the area and officials will try again at 7 p.m. (et).

"While we're suspending the start from noon to 7 ET, we're not suspending our efforts," said NASCAR president Mike Helton via Twitter. "We'll be working all day."

When the Daytona 500 does start, Carl Edwards will lead the field of 43 cars to the green flag. Edwards won the pole position for the race with a lap at 194.738 m.p.h. one week ago.