Severe Isle of Wight thunderstorm weather warning extended to four days

Rainfall totals of 30-40 mm could fall in an hour, say the Met Office, as they extend the severe thunderstorm weather warning for next week

Light show at Flowersbrook by Mike Wilson

Make the most of today’s dry weather as the Met Office weather warning for severe thunderstorms this coming week has now been extended.

It was initially forecasted for Monday and Tuesday, but now has been extended to Thursday.

The warning reads:

Some places are likely to see severe thunderstorms – but there is significant uncertainty in location and timing.

What to expect

  • There is a small chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater, lightning strikes and large hail.
  • Where flooding or lightning strikes occur, there is a chance of delays and some cancellations to public transport.
  • Spray and sudden flooding could lead to difficult driving conditions and increased chance of accidents.
  • There is a slight chance that power cuts could occur and other services to some homes and businesses could be lost
  • There is a small chance of fast flowing or deep floodwater causing danger to life

Areas of thunderstorms are increasingly likely to develop over the south of the UK or nearby continent late on Sunday and will generally track north or north-westwards, potentially affecting all parts of the UK at some points during this period.

Whilst the most intense thunderstorms, in some instances associated with large hail, will most probably be those triggered by the high temperatures of the day over England and Wales, other areas of storms producing heavy rainfall, frequent lightning and strong gusty winds could reach further north at times over Scotland and Northern Ireland.

These could occur at any time of the day. Where the storms occur, rainfall totals of 30-40 mm could fall in an hour, with some locations potentially receiving 60-80 mm in 3 hours, although these will be fairly isolated.

You can check the warning on the Met Office Website each day for updates.

Met office map of thunderstorm warning

Image: © Mike Wilson

Sunday, 9th August, 2020 1:07pm



Filed under: Island-wide, Isle of Wight News, Rain, Top story, Weather

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4 Comments on "Severe Isle of Wight thunderstorm weather warning extended to four days"

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They can’t come too soon !

Rhos yr Alarch

It’s a little confusing; the warning applies Monday to Thursday, but no storms predicted until late on Wednesday….?

Benny C
Lots of uncertainty means just that. It reads fine. What they’re saying is Wednesday is very likely and this is driven by macro data – prevailing bigger weather systems. These are more predictable, but other Highly localised incidents could easily spike almost anywhere beforehand. These conditions are impossible to model at micro level. They can’t possibly know temperatures and pressures at every location. Thunderstorms can take only… Read more »
The problem is that there’s almost always “lots of uncertainty”. Terms like “scattered thunderstorms, or worse “scattered showers” appear far more often in forecasts than definite predictions like light, moderate or heavy rain. Given that “showers” range from no rain to several hours of torrential downpour and “scattered” means they may not occur at all it renders the forecast virtually useless. Whilst I accept the complexity of… Read more »