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On 28 June and 8 July 2021, all the ingredients for severe convection were present and resulted in severe hailstorms over Switzerland, causing historic damage, as recorded by several insurance companies. The return periods of those events locally exceeded 70–100 years according to the new Swiss hail climatology. A coherent and comprehensive picture of those hailstorms is given by a unique combination...
On 25 July 2021, a violent storm took place over parts of East Anglia, UK. The highest measured rainfall was 181mm in about 1.75h. Rapid rises in river flow took place and homes were flooded. This storm exceeded the generally accepted probable maximum precipitation (PMP) for this area of 164mm. The highest official rainfall was 80mm showing the value of unofficial rain gauges. These results have significant...
A quasi‐stationary multicell thunderstorm affected parts of mid‐Suffolk on Sunday 25 July 2021. The epicentre was the village of Brettenham, where extreme rainfall resulted in over 180mm falling in under 2 h. Local flooding occurred, including significant crop damage. The amount of rain observed in such a short duration challenges UK rainfall records. A detailed mesoanalysis is constructed to analyse...
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