A National Severe Weather Warning for thunderstorms has been issued for parts of southern and eastern England and will come into force at 1pm (Sunday) and expire at 6am tomorrow morning (Monday). This warning complements an existing warning for parts of South West England, which will expire at 6pm today.      

Thunderstorm warnings across southern Britain for 17 and 18 September 2023

Across the warning areas heavy showers and thunderstorms are expected to bring some disruption, including the potential of some surface-water flooding which may extend to some properties. Spray and sudden flooding could lead to difficult driving conditions and potential road closures.

Steve Willington is a Chief Forecaster with the Met Office. He said: “Some within the warning area could see torrential rain, perhaps even reaching 40mm of rainfall within the hour. Later in the warning period there is a risk of large hail, frequent lightning and gusty winds.”

The Met Office’s David Oliver comments on the longer-term outlook. He said: “During the rest of today (Sunday) and tomorrow we will see a transition to fresher conditions, with the warmth and humidity of recent days being pushed eastwards away from the UK. This will allow fresher and, at times, unsettled conditions driven by what is happening in the Atlantic.”

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