Rain which, at the time of observation, is falling with an intensity in excess of 0.30 inches (0.76 cm) per hour (over 0.03 inches (0.08 cm) in 6 minutes). Also see Precipitation.
RAIN, HEAVY
Meaning of RAIN, HEAVY in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012