Rain classification

Rainfall (mm)

Occurrence/Duration (minutes/hour)

Light

up to 0.8 in 10 minutes

from 1.1 to 5.1/hour

Moderate

up to 4.0 in 10 minutes

from 5.1 to 25.0/hour

Heavy

up to 8.0 in 10 minutes

from 25.1 to 50.0/hour

Intense

over 8.0 in 10 minutes

more than 50.0/hour