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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There will be some bright and sunny spells today with the chance of the odd shower, mainly in the north and east.
ITV Anglia weather forecaster Aisling Creevey takes us through the statistics behind the region's dry spell.