A UFO sighting reported to the Mutual UFO Network (MUFON) and filed by the group as Case Number 66326, includes photos of what appear to be a lenticular cloud, but which online UFO enthusiasts are pushing as evidence of existence of “cloaked” UFOs. 
 
 The anonymous witness claims that he photographed the strange looking cloud over Channelview, Texas, on May 10, 2015. 
 
 According to the witness, “It looked like a cloud at first, but its appearance was circular and disappeared before my eyes.” 
 
 Convinced that he had witnessed an unusual phenomenon in nature, the witness uploaded the image and a report to the MUFON website. The photos, which may be viewed in the MUFON archives here and here, are shown below. 
 
 The witness believes that what he saw was not an ordinary cloud but a “cloaked UFO,” that is, a UFO using the form of a cloud to hide itself so that it can travel across the skies unseen by humans. 
 
 The witnesses’ conviction that the cloud was a UFO stems from the manner in which it appeared and disappeared in a matter of seconds. 
 
 “It seems unlikely that such a massive cloud appears and disappears within a few seconds, except if it is true that UFOs use clouds to hide themselves in order to travel unseen above Earth’s surface.” 
 
 UFO enthusiasts have often alleged that alien flying saucer UFOs disguise as lenticular clouds. But meteorologists insist that lenticular clouds are natural weather phenomena that do not need to be linked with UFOs. 
 
 According to meteorologists, lenticular clouds are formed when moisture driven by strong winds encounters a topographic barrier, such as a mountain, that forces it to condense into clouds. More rarely, they could be formed in plains when strong winds set up a cold front that acts as a form of barrier against moisture-laden air. 
 
 Although scientists and skeptics have often tried to debunk claimed sightings of “cloaked” lenticular cloud UFOs by arguing that most alleged sightings are mistaken, the belief that some UFOs “cloak” as lenticular clouds continues to the held widely in the UFO community. 
 
 “If an ET craft wanted to hide from people, why would it take a shape that looks like what most people would regard as a ‘UFO shape?’ Why not ‘cloak’ as more common objects that would be less likely to draw attention to themselves?” 
 
 UFOs, according to believers, disguise in other ways besides lenticular clouds. Some reportedly appear in the night sky disguised as stars or planets. Such UFOs are detected when they “de-cloak” accidentally, or do something unusual, such as move in a manner that reveals they are not normal stars or planets. 
 
 The Inquisitr recently reported sightings of “UFO-shaped” lenticular clouds over Texas. 
 
 Photos of the strange clouds over Robertson and Leon Counties in eastern Texas were posted online on May 25 following severe weather in Texas and neighboring Oklahoma. 
 
 The sightings sparked UFO and HAARP weather manipulation conspiracy theories. 
 
 However, some conspiracy theorists believe that lenticular clouds, such as what appeared over Texas, are caused by weather manipulation experiments being conducted secretly by government agencies, such as under the High Frequency Active Auroral Research Program (HAARP) and NORAD. 
 
 [Images: MUFON via UFO Sightings Hotspot] ||||| Texans keep reporting clouds as UFOs; more than 56 reports in past month 
 
 Circular clouds that pop up out of nowhere and disappear just as fast apparently have a lot of people believing in UFOs. 
 
 A spate of sightings late last month stirred some alarm -- "Woah! (sic) The sky over Texas appears to be FILLED with UFOs!" someone exclaimed on Twitter -- but reason prevailed as meteorologists and other scientific types debunked the flying saucer theory. 
 
 The odd formations are really "lenticular clouds," created when warm humid air is thrust rapidly upward into cooler regions, the meteorologists said. It usually happens when warm air is forced up and over mountains but can also occur in the absence of mountains, commenters said on social media. 
 
 Refusing to die, however, the topic returned Thursday with a story on inquisitr.com, about a report filed to MUFON, the Mutual UFO Network. 
 
 Filed Wednesday, the report described an incident on May 16 over Channelview in East Harris County. 
 
 The person who filed the report did not see the incident himself but submitted it on behalf of friends who wanted to remain anonymous. The report is listed on the MUFON website as No. 66323. 
 
 "It looked like a cloud at first, but its appearance was circular and disappeared before there (sic) eyes," the report writer said. 
 
 From the report, it's unclear if the attached photos captured the actual sighting or something silimar. 
 
 UFO-Shaped Lenticular Clouds Over Texas Spark HAARP Weather Manipulation Conspiracy Theories http://t.co/WqmdinABxA pic.twitter.com/VPNzq4qp5E — #StormHour (@StormHour) May 29, 2015 
 
 "I do have a picture that closely resembles what they claim to have seen," the submitter wrote in his report. 
 
 Fletcher Gray, MUFON's volunteer chief investigator for Texas, said he was sure the Channelview sighting was a cloud and not a UFO. 
 
 "It will be cleared out as a lenticular cloud," Gray said Friday of the Channelview report. 
 
 "When we have a low (pressure system) like that, with the upper atmosphere as cold as it was, and with all that hail and rain in the last four to five weeks, you get those strange cloud formations," he said. "Those are common." 
 
 In the past month, Gray said he had received 56 reports of possible UFO sightings in Texas. "People think they've got something, and they don't have anything." 
 
 Some of the reports are obvious fakes, he said, such as the man who sent a photo of a garbage can lid with green paint on it, trying to pass it off as a UFO. 
 
 "You could see the handles on the lid," Gray said.
– A rash of UFO sightings in Texas is likely caused by certain cloud formations, unless you believe that UFOs disguise themselves as clouds. Several sightings last month garnered media attention, but scientists and meteorologists identified the airborne objects as disc-shaped "lenticular clouds" caused by warm air rising in cooler areas, the Houston Chronicle reports. Then a fresh sighting appeared on the Mutual UFO Network website this week: "It looked like a cloud at first, but its appearance was circular and disappeared before there [sic] eyes," writes someone who claimed to be making the report for friends, who allegedly saw the "UFO" on May 16. Pictures were attached, but it's unclear if they're of the "UFO" in question or other similar clouds. But MUFON's volunteer chief investigator in Texas, Fletcher Gray, tells the Chronicle it's really just a cloud caused by a low pressure system, colder upper atmosphere, and recent bursts of hail and rain: "It will be cleared out as a lenticular cloud," he says. Some UFO enthusiasts, however, claim that spaceships travel disguised as lenticular clouds and are spotted when they accidentally "de-cloak," Inquisitr reports. Meanwhile, Gray is handling 56 UFO sightings submitted over the past month—including one by a guy who photographed a green garbage can lid and said it was a UFO. "You could see the handles on the lid," says Gray. (Read about UFO enthusiasts who unveiled a "Roswell alien photo.")