Thunderstorms and rain warning for Devon

Mary Youlden
Authored by Mary Youlden
Posted Thursday, July 2, 2015 - 12:01pm

A weather warning of heavy rain and thunderstorms has been issued for Devon.

Met Office forecasters say isolated heavy, and possibly severe, thunderstorms are expected to develop on Friday evening across parts of England and Wales. 

These are likely to become more frequent later and spread northwards towards southern Scotland.

Some torrential downpours are possible leading to localised surface water flooding, with large hail and frequent lightning also possible hazards.

The public should be aware that there is a chance of some very localised significant disruption

This warning is valid from  7pm on Friday until noon on Saturday.

The Exeter-based agency’s chief forecaster said: “On Friday evening another hot and increasingly humid airmass is expected to spread into the south from the Continent.

“This air mass looks conducive to the development of isolated thunderstorms during the evening across England and Wales which could become more frequent later in the night as they spread northwards towards Scotland.

“With large amounts of energy again available in this atmosphere storms could be severe, with torrential downpours and large hail. 30 mm of rain is possible in less than an hour, with as much as 50 mm possible in 3 hours very locally.

“Large uncertainty remains regarding areas most at risk from storms, and many areas will miss these altogether, staying largely dry. However, where they do develop, disruption is possible.”

The five day regional forecast is as follows:

Today:
Largely cloudy, with thundery rain or showers moving northwards during the morning. Becoming drier later in the day and turning increasingly sunny from the west. Maximum Temperature 22°C.

Tonight:
A fine evening, then largely clear to start the night. Some patchy low cloud is likely to develop later, and it'll be cooler than on recent nights. Minimum Temperature 11°C.

Friday:
A sunny but fresher start than recently, though gradually clouding over. Becoming increasingly warm and humid, with thundery rain, perhaps locally heavy, moving northeast later. Breezy, especially in the west. Maximum Temperature27°C.

Outlook for Saturday to Monday:
Fresher and breezy on Saturday, with sunny spells and the risk of showers. Similar on Sunday, though with winds easing. Cloudier on Monday with rain at first.

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