In weather forecasts, precipitation is divided into what levels

Precipitation grade terms 12-hour total precipitation (mm) 24-hour total precipitation (mm)

Drizzle, light rain, shower 0.1 - 4.9 0.1 - 9.9

Light rain - Moderate rain 3.0 - 9.9 5.0 - 16.9

Moderate rain 5.0 - 14.9 10.0 - 24.9

Moderate rain - Heavy rain 10.0 - 22.9 17.0 - 37.9

Heavy rain 15.0 - 29.9 25.0 - 49.9

Heavy rain - Heavy rain 23.0 - 49.9 38.0 - 74.9

Heavy rain 30.0 - 69.9 50.0 - 99.9

Heavy rain - Heavy rain 50.0 - 104.9 75.0 - 174.9

Heavy rainstorm 70.0 - 139.9 100.0 - 249.9

Heavy rainstorm - extremely heavy rain 105.0 - 169.9 175.0 - 299.9

Extremely heavy rain>= 140.0 >= 250.0< /p>