Around 20 homes have been flooded after torrential rain brought flash floods to Sudbury in Suffolk.
The area affected was East Street in the town at about 2.30pm on Saturday afternoon.
Suffolk Police said they were aware of flooding incidents across the county.
Eyewitness Vikki Woodford said she saw the tornado touch the ground at Wortwell on the Norfolk-Suffolk border.
Vikki wrote on the ITV News Anglia Facebook page: "I have pictures of it from Wortwell - very clear! We watched it touch down, videoed it then left before the storm was overhead."
She added that it then fizzled out.
There are no reports of any damage.
Thundery downpours have been sweeping across the East Anglia region on Saturday and a possible tornado has been spotted in Stradbroke near Eye in Suffolk.
The picture was taken by ITV Anglia viewer Andy Bevan from his back garden at 2.30pm.
Tornadoes can be spawned from the base of thunderstorm clouds. They start as funnel clouds which can twist all the way down to the ground. They only become tornadoes if they touch the ground.
There is no confirmation that the twister in the picture hit the ground so it may have just been a funnel cloud.
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More localised torrential downpours are forecast for Saturday after the Anglia region was hit by thunderstorms on Friday.
Below is a video sent in by ITV News Anglia viewer Lesley Chambers of the conditions between Acle and Filby near Great Yarmouth on Friday afternoon with hail and flash floods.
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Norfolk Fire and Rescue Service has been dealing with a number of flooding incidents in the county as a result of heavy rainfall.
Since just after 3pm today it has received 50 plus calls with the majority from the Ormesby St Margaret and Hemsby areas.
Norfolk Fire and Rescue Service has the following advice in flooding situations:
- Do not compromise your own personal safety or the safety of others
- Don’t drive or wade into flood water if at all possible, especially if it is fast flowing
- If you really can’t find a different route to drive round the flood, walk across first to check for depth
- If you absolutely have to enter flood water, don’t go deeper than the tops of your wellies, and use a pole to probe for holes in front of you
- Have a mobile phone with you, check the signal, and know exactly where you are – when you get stuck, we will need to be able to find you
- Be patient – these are flash floods, which will subside quickly; you could just wait a bit and see if the water level is dropping
Torrential downpours and thunderstorms are currently tracking across Northamptonshire and into Cambridgeshire and Norfolk, heading north east towards The Wash.
Areas on the rainfall radar map coloured white indicate rainfall rates of more than 32 mm per hour.
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