These spectacular mammatus clouds swept across the sky over York on March 27, 2016 transforming the city into a post-apocalyptical scenery.
The distinctive Mammatus clouds are believed to have been caused by turbulence in the cloud base due to a change of weather.
The Met Office says Mammatus clouds are among the more unusual and distinctive formations.
They usually form with large cumulonimbus clouds, particular when they are forming large thunderstorms.
Storm Katie has seen gusts of up to 105mph battering England and Wales, with several flights diverted from airports and major bridges shut.
In York, the rain is expected to have petered out by this afternoon with wind speeds dropping as the day goes on.
Please do not drive into flood water.
#eustorm WA1,UK 3/30 – Image of the Day! – Simon Taylor – HUGE Mammatus + Rainbow today in Warrington, UK – FAB! pic.twitter.com/wDe4Lsx2gZ
— #eustorm (@EUStormMap) March 27, 2016
Here a Flickr video by Mat Robinson of these insane stromy clouds.