Arcus cloud Arcus cloud An arcus cloud is a low, horizontal cloud formation, usually appearing as an accessory cloud to a cumulonimbus. Roll clouds and shelf clouds are the two main types of arcus. Arcus clouds most frequently form along the leading edge or "gust fronts" of thunderstorm outflow; some of the most dramatic arcus formations mark the gust fronts of derecho-producing convective systems. Roll clouds also may arise in the absence of thunderstorms, forming along the shallow cold air currents of some sea breeze boundaries and cold fronts. A shelf cloud is a low, horizontal, wedge-shaped arcus cloud. A shelf cloud
Ordinary Thunderstorms failed to find Kindred, is sacked from his position as a 'security consultant' and is forced to leave the country after realizing that he will be made the fall guy for Philip Wang's murder and that killers are now after him. And Adam Kindred, happily involved with Rita and Ly-on, wonders whether he should retain his identity of Primo Belem or tell Rita the truth and assume his former life as Adam Kindred. Ordinary Thunderstorms Ordinary Thunderstorms is a novel by William Boyd. It explores the dark side of London's underworld and the international pharmaceutical industry. Adam Kindred is a