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AMA practice at Barber Motorsports Park is currently on hold due to rain and standing water at the apexes of many corners, according to an AMA Pro Racing official.

AMA Supersport riders had already completed their Sunday morning warm-up in dry conditions when rain began to fall at the start of the 250cc Grand Prix practice.

Update: At 10:20 a.m. Central Time, the 250cc GP class was sent out on track even though it was still raining steadily.