Downpours to bring flash flood threat to UK into midweek

By Eric Leister, AccuWeather meteorologist

June 27,2017, 10:26:01AM,EDT

 

 

Batches of rain and thunderstorms will swing through Wales and England on Wednesday, continuing the threat for flash flooding and localised travel delays.
The heaviest downpours are expected to target eastern England, including Greater London.
“More than 25 mm (1 inch) of rain is possible in an hour or two,” said AccuWeather Meteorologist Tyler Roys.

Thunderstorms will also be a threat across southern and eastern England, especially during the afternoon, and could result in significant delays during the evening commute.
The slow movement of this storm system will result in yet another day of rain with localised downpours on Thursday. Flooding will again be a concern, especially for areas that see multiple days of downpours.
The steadiest rain is expected in northern England, Scotland and eastern parts of Northern Ireland, while isolated thunderstorms will threaten southern England.
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Aside from the threat for flooding and travel delays, this storm system will also keep temperatures near to below normal throughout the United Kingdom.
Temperatures are not forecast to reach 21 C (70 F) anywhere in the U.K. on Wednesday, only one week after the hottest June day in 40 years was recorded when the temperature reached 34.5 C ( 94.1 F) in London.
Similar temperatures will be felt on Thursday with highs ranging from 14-20 C (57-68 F) across the country.
This cool weather pattern will continue from Friday into the weekend along with the threat for brief showers and gusty winds each day.
The overall weather pattern will favor near- to slightly below-normal temperatures in the north and slightly above-normal temperatures in the south next week as storms arriving from the Atlantic keep any extreme heat suppressed in the Mediterranean.