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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Warm sunny spells today remaining dry
Remaining dry with warm sunny spells on Monday.
ITV Anglia weather presenter Aisling Creevey has been out on the streets of Norwich on St Patrick's Day getting people to try Irish dancing.