Having watched YouTube videos on Salton Sea it made me wonder what sort of storms would make the Colorado river flood, it turns out that ARk storms, that is Atm

Having watched YouTube videos on Salton Sea it made me wonder what sort of storms would make the Colorado river flood, it turns out that ARk storms, that is Atmospheric Rivers predicted to occur once every 1000 years (that's the 'k') have dropped huge amounts of water. Although the 'k' is supposed to denote once in a thousand years, they seem to occur every 100 years or so.