Waterspout filmed by RAF crew off Anglesey
A waterspout was filmed by an RAF crew as they were carrying out training exercises off South Stack lighthouse, Anglesey.
Forty minutes earlier they spotted a first waterspout off the Skerries, just north of Anglesey, but say they were amazed to see the second forming right before their eyes.
Flt Lt Mike Castle was taking part in the training exercise with 203 Squadron Sea King, based at RAF Valley when he turned on the onboard camera to record these pictures.
The drama unfolded about four miles (6.4km) directly in front of the aircraft at 1140 GMT on Monday.
"In 12 years of being at RAF Valley I've only ever seen four of these and two of those were yesterday," he said.
BBC Wales weatherman Derek Brockway said: "Waterspouts are fairly common and occur when a tornado forms over oceans, lakes, or rivers."
He said waterspouts can vary in size from a few feet to more than a mile in height, and from a few feet to hundreds of feet wide.
"Witnesses say they make hissing and sucking noises as they move," he said. "These water twisters can move anywhere from two to 80 miles an hour.
"Winds within the waterspout can spiral around at 60-120 miles an hour. They usually last up to 15 minutes, and few last more than half an hour."
The Met Office said there had also been other reports of cloud funnels - the start of a waterspout - off the Isle of Man on Monday.