Rain 4 : Precipitation in the form of liquid water drops. Recommended SI unit for measurement is millimetres (mm) (10 mm is equivalent to 1 cm). Note: Precipitation
The Canadian Interagency Forest Fire Centre (CIFFC), Glossary of Forest Fire Management Terms, Manitoba, Canada 2003. http://bcwildfire.ca/mediaroom/Backgrounders/2003_ Fire_Glossary.pdf, (For Fr - Canad) {474}