The National Weather Service in Miami has warned of heavy rain and thunderstorms for Miami Grand Prix race day throughout the week.
Miami is expected to receive significant rainfall throughout the day, with a good chance of thunder, lightning and hail.
In an attempt to avoid the worst of the weather, the Miami GP has been brought forward by three hours, with it now starting at 13:00 local time (18:00 BST).
The big questions hanging over the Miami GP are: will the new start time allow a full race, and just how much will the weather impact proceedings?
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