A reader has sent in his video of the dramatic moment a funnel cloud formed as he walked in Shipley Park.
Keith McMahon captured the weather event, which happened on Sunday evening, on camera.
It prompted a flurry of comments on social media.
The clouds form when two different types of cloud meet, for them to be classed as a tornado it would have to make contact with the ground.
Did you see the funnel cloud? Send your photos and videos to firstname.lastname@example.org.