University of Reading Meteorologist Roger Brugge says there is a risk of heavy rain on Sunday.
The remains of former Hurricane Bertha are due to hit the shores of Southern England at the weekend.
Roger said today: “This brings a risk of severe weather during the day, particularly during the second half of Sunday. The exact track of the low pressure area is still quite uncertain, but Maidonians should be aware of the risk of heavy rain and strong winds."
However he added there is still a possibility that the rainfall will be less severe if the centre of the storm system travels south of Maidenhead.
He added: “Such summer storms are not unprecedented - on the bank holiday of 25th August 1986 35.4 mm of rain fell in Hurley as the remains of Hurricane Charlie passed by, but there have also been many wetter August days in past years - often from heavy thunderstorms.”
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The Met Office has issued a yellow alert for Windsor and Maidenhead, Slough and Wokingham, warning that rain moving eastwards across the south of the country may turn to snow in some places.