Cloudbursts
Go to Climate Change Overview Understanding Global Warming Extreme cloudbursts are rare! The Danish Meteorological Institute (DMI) has measured the rainfall in Denmark from 1874 to today - hyperlink. In the decade 1874-83, 659 mm/year fell as a national average. In 2007-16, this average had increased by 120 mm to 779 mm/year. Warmer sea and land have given cause to an increased evaporation, which mercifully returns to us as precipitation. Figure 1. Rainfall is steadily increasing with no accelerating trend. Black line is 11 year moving average. A cloudburst is an extreme amount of precipitation in a short period of time. DMI defines a cloudburst as 15 mm of rainfall within a maximum of 30 minutes. Cloudbursts are regional and are only measured when they hit a measuring station. The IDA Wastewater Committee has now a total of 171 rain gauge stations i...