Croydon, England, United Kingdom Severe Weather Alertstar_ratehome

Information on update: Southwest England and south Wales have been removed from the warning (rain now cleared), whilst the warning has been extended slightly further north to include other areas of southern and eastern England. Heavy showers, perhaps merging into longer spells of heavy rain at times, will continue to push from west to east through Friday morning. 

Whilst not everywhere will see the heavy showers or rain, where they do occur 10-20 mm of rain in less than an hour is possible. 50-70 mm of rain is possible in a few hours where heavy showers become more prolonged, this most likely near coasts. Some flooding in these wetter areas is possible. A few showers could be accompanied by the odd rumble of thunder, again this more likely near to coasts.

Heavy showers and rain should clear into the North Sea by early afternoon.

For further details see https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings