The precipitation-radar images show only qualitative information on precipitation.
Their quality is limited to non-quantitative information, since radar is only an indirect method of measuring precipitation, based on reflectivity. Precipitation data in mm and rate data in mm/h are approximations formed via a standard relationship between dBZ levels and instantaneous precipitation values.
For different technical reasons radar information is still incomplete and patchy (
11 Jul
12 Jul
13 Jul