There is concern that passing rainstorms could affect the leaderboard of Rally Mexico on Saturday.
The Leon-based event has not seen rain in seven years, but all that could change on day two courtesy of a cold front moving through the country.
Ford World Rally Team weather expert Mike Croft-White said: "There is big cold front coming and there is a chance it could bring some significant storms. If the rain does come then it is likely to mean some heavy and localized showers."
Run in a mountainous area, the rally is unlikely to be hit by prolonged and wide-ranging rain, but Croft-White said if a driver was unlucky it could have a big effect on the conditions of the stage.
"It's the sort of thing where the storm could come while a driver's sitting on the startline and have a significant impact on them," he said, "but then the rain would be likely to stop quickly and the roads dry very quickly. It could have an impact on the event, but it's not the sort of odds which will have the team considering a setup change."