Large diurnal temperature ranges and the absence of precipita-tion are additional properties of cT air. Flying conditions are excellent. However, during the daytime turbulence sometimes extends from the surface throughout the average flying levels. Relative humidities are usually less than 30 percent. Quite often they are too low to measure accurately.
Superior air is observed in both summer and winter.
Flying conditions are excellent in this air mass, since no cloud forms are present and risibilities are usually very good because of the dryness. This type of air mass is very important because superior air frequently stops all convective activity caused by intruding maritime tropical air. This generally prevents the formation of showers and thunderstorms unless the mT air mass is deep. Integrated Publishing's Official Web Page Click here for a current index of everything on this web site. All Rights Reserved.