*Convective rain more than 60 mm in 2 to 4 hours duration (typical) may cause flash floods. However, monsoon rains are typically of long duration with intermittent heavy bursts and the intensity can occasionally exceed several hundred mm in 24 hours.

CATEGORIZATION OF RAINFALL INTENSITY (IN ONE HOUR)

Category Range (mm) Legend
Light 1-10
Moderate 11-30
Heavy 30-60
Very Heavy > 60