Heavy rain hit Sochi on Friday night and has not stopped since, which could lead to a disrupted day at the Russian Grand Prix.
Rain is set to stay for most of the day, with one more hour of Formula 1 practice currently scheduled for 10:00 UK time.
Qualifying is set to take place at 13:00 UK time, when the grid will be decided and pole position will be won. The hope is that there is enough visibility and not too much standing water in order to get the F1 sessions and the Formula 2 and Formula 3 races underway.
There is a chance F1 qualifying will be moved to Sunday morning if the conditions are deemed unsafe. For all of the latest news and updates, stay tuned to RacingNews365.com.
Video: Why grid penalties could decide the F1 title fight
RacingNews365.com takes a look at how grid penalties could be a crucial factor in the intense title fight between Lewis Hamilton and Max Verstappen.