Thunderstorms have started to break out over eastern parts of Norfolk, Suffolk and Essex.
The Met Office has a yellow weather alert in force warning of torrential thundery downpours in places with the risk of surface water flooding. There's also the possibility of hail and strong gusts of wind.
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A cold day with some icy stretches, especially in the morning. It should stay dry with some good sunny spells.
Although it is forecast to turn colder over the Christmas period in the Anglia region, it has been a mild December so far.
Average December temperatures so far are keeping 2014 on course to be the hottest year on record in the Anglia region.