Above is a map of accumulated rainfall on the 21 February from 0000 to 0900 UTCUTC Coordinated Universal Time or UTC is the primary time standard by which the world regulates clocks and time. It is within about 1 second of mean solar time (such as UT1) at 0° longitude (at the IERS Reference Meridian as the currently used prime meridian) and is not adjusted for daylight saving time. It is effectively a successor to Greenwich Mean Time (GMT). and estimated from weather radar. Is it evidence of rainfall bunching as mentioned in the recent Deep Dive given by Alex Deakin? Maybe. Here’s the link to the paper “Rainfall enhancement downwind of hills due to standing waves on the melting-level and the extreme rainfall of December 2015 in the Lake District of northwest England” (link).