Formula One could be in for a wet weekend at the Sepang circuit with thunder storms forecast.
Although there could be a dry start to Friday's first practice, midway through the heavens are expected to open with the conditions worsening as the day progresses.
Heavy showers are forecast for second place with a high of 32'C for the opening day's action.
There is more of the same on Saturday afternoon with heavy rain throughout final practice and qualifying with a high temperature of 31'C.
As for Sunday, while thunderstorms are expected in the morning it will dissipate to a light shower by the time the 56-lap Malaysian Grand Prix gets underway at 4pm.
A high of 32'C is forecast for Sunday with the humidity at 65 per cent.