Thunder and lightning could well hit the Brazilian Grand Prix for Friday practice, but teams can expect much clearer skies come race day.
Weather has played a crucial role in many a Brazilian Grand Prix over the years, perhaps none more so than the 2008 edition, as rain caused strategic chaos and Lewis Hamilton was crowned world champion on the final lap of the season, at home hero Felipe Massa's expense.
Of course, Hamilton and Mercedes are already champions in 2019, so the excitement will perhaps not reach those levels at Interlagos.
But with mixed conditions across the weekend, the teams will be forced to get their thinking caps on regardless!