A weather warning for thunderstorms has been issued for the East of England region, including parts of Norfolk.
The Met Office put the yellow warning in place between 1pm and 8pm today, covering parts of south Norfolk including Diss, Loddon and Brandon.
According to the office, the thunderstorms could lead to travel disruption and some flooding.
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Heavy rain downpours are expected, with showers and thunderstorms likely to cause some disruption to travel due to spray, standing water and hail.
A spokesman for the Met Office said: "While some areas will remain dry, thunderstorms are likely to develop this afternoon and evening from the east and move relatively slowly westwards or north-westward.
"Where thunderstorms occur, heavy rain accompanied by frequent lightning is likely with potential for 25 to 30mm of rain to fall in 1 or 2 hours in a few places and perhaps as much as 50mm could fall in one or two spots.
"In a few places there may also be some hail."
Spray and sudden flooding could lead to difficult driving conditions and some road closures and there is a small chance that communities could become cut off by flooded roads.
There is also a slight chance that power cuts and loss of other services could occur.
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