The Coronation flypast is at risk of being cancelled due to bad weather and contingencies are being put in place if cannot go ahead or it needs to be scaled down, Report informs referring to Mirror.
Members of the Royal Family are set to line up on the Buckingham Palace balcony to watch aircraft, including the Red Arrows, Typhoons, Apache helicopters and a Lancaster bomber, fly by at 2:30 p.m.
But the Met Office warned that showers are on the cards and clouds will be widespread on Saturday, which could potentially impact safety, meaning that the flypast may need to be modified or cancelled altogether.
The RAF will assess the weather forecast until the last minute and only make a decision about cancelling the flypast one or two hours before it is due to take place.
According to reports, parts the flypast or all of it could be moderated or cancelled outright due to the weather.
Met Office forecaster Simon Partridge told The Telegraph that rain is likely by Saturday lunchtime, which is "not ideal" but appears to be "tradition" as previous Coronations - including that of Queen Elizabeth II - also experienced rain.
Because of the Coronation, flight restrictions will be imposed on light aircraft and drones above London on May 5 and May 6.