Thermals are often indicated with the existence of seen isolated cumulus clouds at the top on the thermal. Cumulus clouds are fashioned via the increasing air in the thermal since it ascends and cools, right until the water vapor inside the air starts to condense into obvious droplets. " https://thermal-shock-testing12334.theideasblog.com/36703295/indicators-on-thermal-cycling-chambers-manufacturer-you-should-know