The government predicted rainfall more than 150 mm on the 25th of May. Over 500 mm of rain fell. Technically, they were not wrong (550 mm is within the range of “more than 150 mm”), but obviously, forecasts like this might as well not be made. [an error was corrected in the above para] But it is wrong to condemn the Met Department which operates even without Doppler radar, though they have been talking about it since 2012. But as discussed below, Doppler radar is old and can only tell about large rain drops.