Interlagos is under a yellow weather warning for Saturday. The National Institute of Meteorology has put out an alert for Sao Paulo for November 7, qualifying day, with forecasters talking of heavy rain, gusts of 40 to 60 kilometers per hour (25 to 37 mph) and maybe some hail.
Without a sprint on the programme, Friday practice is the only dry hour teams can expect to have, and both Ferrari and Cadillac are leaving it to their reserves.
Should it be wet on Saturday the outlook for Sunday is altered. Rain here has been the cause of some very disrupted racing in recent years, and the weekend is already replete with special liveries and helmets.
More Stories
Lawson and Lindblad Get Another Year at Racing Bulls
The Formula 2 Title Will Now Be Settled on Track
Vowles Says Williams Got Carried Away and Calls the Season a Blip
Hirakawa Waits Alongside Camara as Haas Leaves the Vegas Seat Open
Red Bull Holds Third by 17 Points and Haas Leads Audi by Three