A "special" type of storm swept across the country on Monday.
The storm, thought to be an unusual "supercell" storm, travelled through the south Midlands, bringing rain, large hailstones, and a tornado in Oxfordshire.
Richard Glazer drove through the tornado with his wife and son on the A34 near Kidlington, Oxfordshire:
It was very wet, we were just driving on the A34 and looked up and realised one part of the sky was moving in one direction and another in the opposite direction," he said.I thought, 'that looks like a tornado!' We pretty much drove through it, we were right underneath it.
As we drove into it the trees were blowing left to right and as we got through it they were blowing the other way.
It wasn't particularly big but it was amazing to see the change in the environment. It was grey and a bit blurry and then to be hit by something like that. You suddenly realise the force of nature, it's incredible.
Footage of the tornado is on ITV Meridian.
Forecasters said it was almost certainly a tornado, and the storm that caused it was thought to be a supercell storm - more commonly seen in the US than the UK.
Brendan Jones, forecaster at Meteogroup, the weather division of the Press Association, said:
This particular thunderstorm developed around 3pm over the northern part of Wiltshire, and then gradually over the next three hours that storm tracked through Oxfordshire and into part of Buckinghamshire before eventually dying out before it got to Cambridgeshire.
That's quite far for one thunderstorm to track.
At the moment it's difficult to say exactly where the tornado was because while the parent thunderstorm travelled all the way across the south Midlands, it wasn't necessarily producing a tornado all the time.
There has been more than one report of a tornado beneath this storm. There has also been some quite big hailstones.
There are suggestions that this thunderstorm was a special type of storm that we don't get too often in this country. That's a reason why it was able to last for such a long time.
Mr Jones said it was unlikely there would be another supercell storm in the coming week, as they require very specific atmospheric conditions, but forecasters have said there was a "definite chance" of further thunderstorm activity.