UK Weather Forecasts A Rainy September Thanks To Tropical Storm Henri

You Can Thank Tropical Storm Henri For This Very Soggy September
|

In case you hadn’t already noticed, September has been something of a soggy affair and that's set to continue, thanks to the remnants of a tropical storm hitting the south-east coast of Britain.

Parts of the UK will experience heavy rain, thunder and lightning as a result of ex-tropical storm Henri moving across from the Atlantic.

A yellow weather warning for rain has been issued by the Met Office, with southern and central parts of England expected to be worst affected, the Press Association reports.

Open Image Modal

Rain, rain go away

There is a possibility of localised flooding, the forecaster said, with more than an inch of rain falling in some areas.

While London and the south-east are set to brighten up as the day goes on, that will make way for thunder and lightning, forecaster Dean Hall said.

"There is scope for spot locations to get greater than 30mm of rainfall during the course of the day," he said.

Weird weather phenomena
Super cells(01 of18)
Open Image Modal
This ominous cloud is a super cell: a thunderstorm with a a deep, rotating updraft, called a mesocyclone. They are rare, severe storms and can change the weather up to 30 kilometres away. (credit:Barcroft Media via Getty Images)
Brinicles or "the icy finger of death"(02 of18)
Open Image Modal
Eerily referred to as the "icy finger of death, brinicles are like underwater icicles. They appear beneath sea ice when a flow of very cold water mixes with other ocean water. Sea ice is very different from ice on land: it's spongelike in texture. When it touches the sea bed, a web of ice can form that freezes everything it touches, including creatures like starfish. (credit:Alamy)
Volcanic lightning or 'dirty thunderstorms'(03 of18)
Open Image Modal
It's an awesome display when lightning and volcanic eruptions collide. Scientists believe that a volcano emits a large electrical charge, so an opposite charge is created to balance this out - in the form of a lightning bolt. (credit:SUTANTA ADITYA via Getty Images)
Hoar frost(04 of18)
Open Image Modal
These frost crystals are so thick that they look like snow. The interlocking shards appear when objects that are below freezing are exposed to "supersaturated air" (air with a high water content). On a warmer object, dew would form, but the humidity in the air produces the spikey hoar frost. (credit:ASSOCIATED PRESS)
Weatherbomb(05 of18)
Open Image Modal
The weatherbomb was the original strangely-named weather phenomena to blast Britain recently. The catacylsmic weather event - bringing strong winds and heavy rain - is officially known as an extratropical cyclone, a strong cyclone that forms after a rapid fall in pressure within a storm. The process that creates it is known as bombogenesis. (credit:Photography by Tim Bow via Getty Images)
Sundogs(06 of18)
Open Image Modal
This slightly mystical effect is a sundog, also known as a parhelia or mock sun. It happens when light interacts with ice crystals in the atmosphere. Two bright spots appear either side of the sun, at the same height. Sun dogs are often seen with what's called a 22º halo - a ring around the sun formed from light refracting off ice crystals at a 22º angle. (credit:August Allen/Flickr)
Ice volcanoes(07 of18)
Open Image Modal
Ice volcanoes erupt with icy water rather than lava, and occur when water and and ice are close together. When waves hit a shell of ice in a weak spot, a hole forms, spewing water and sleet high into the air. They regularly form around the Great Lakes in the Northern USA. (credit:Michigan Tech University Geological and Mining Engineering and Sciences Department)
Blue jets, sprites and elves(08 of18)
Open Image Modal
Their names sound magical, and these optical phenomena are something special. They were only recently recorded using low-light television technology. They are the result of the fallout from thunderstorms: the sprite is a red flash that appears above the storm when lightning hit, while the elf is a halo which can appear even higher up when the storm generates an electromagnetic pulse - lasting for less than a thousandth of a second. The blue jet is a streak that looks like a falling star, and is in fact an electrical ejection from the core of a thunderstorm. (credit:Wikipedia)
Vortex shedding(09 of18)
Open Image Modal
Vortex shedding occurs when the wind hits a mechanical system - such as the lamp posts on this motorway - at a specific frequency, causing the system to “excite” . They vibrate and move, which is pretty frightening for the drivers in this case.
Snow doughnuts(10 of18)
Open Image Modal
These amusingly-named lumps form when there is a hard layer of snow covered by several more inches of dense snow. On a hill, gravity pulls the hard lump, downwards, gathering more bulk as it rolls. With the perfect density and temperature, it rolls leaving a hole in the centre. (credit:ASSOCIATED PRESS)
Snow rollers(11 of18)
Open Image Modal
A cousin of the now doughnut, these odd-shaped natural snowballs form when high winds roll snow over open areas. (credit:ASSOCIATED PRESS)
Waterspouts or "sea monsters"(12 of18)
Open Image Modal
When a tornado is generated over water, this is what happens. The funnel-shaped cloud is connected to a larger cloud above. Although it looks like they suck up water, they don't exactly: although a "spray ring" forms and some spray rises up the air tunnel. (credit:ASSOCIATED PRESS)
Mammatus clouds(13 of18)
Open Image Modal
These bizarre pouches of cloud, which can look like hundreds of white balloons have been released into the sky, are a true mystery. Scientists don't know how they form, but have several theories. It could be due to a cooling of part of the cloud which causes it to drop down, an unstable cloud where "cloudy" air doesn't mix fully with dry air, or possibly gravity waves which move part of the cloud away. (credit:Dennis Stacey via Getty Images)
Dust devils(14 of18)
Open Image Modal
The dust devil is a strong whirlwind, which sucks up dust and debris, making it visible. The devils are smaller than tornadoes - less than 100 feet tall - and form differently. They come into being when light winds move over a hot surface and convective rolls of air are formed, meaning a desert is a common location for dust devils. (credit:NBC via Getty Images)
Giant hailstones(15 of18)
Open Image Modal
As the name suggest, these are really, really big hailstones. They are sometimes called "ice bombs" and tend to shatter when they hit the ground. One of the largest ever recorded was seen in Vivian, South Dakota, in the US in 2010. It was 8 inches in diameter and weighed nearly 2 pounds. (credit:SEBASTIAN WILLNOW via Getty Images)
Lenticular clouds (16 of18)
Open Image Modal
Lenticular clouds are stationary, lens-shaped cloud - but people often mistake them for UFOs as they also look rather like saucers. High altitudes are needed for them to appear, and they usually form at right-angles to the wind direction, when stable moist steams of air move over a formation like a mountain. (credit:Hans Neleman via Getty Images)
Roll clouds(17 of18)
Open Image Modal
These solitary clouds seem to rotate around a horizontal axis, and aren't linked to any other formations. They are are usually formed by cold, wet air flowing out of sea breezes or cold fronts. The most famous is Australia's 'Morning Glory' cloud, which appears regularly in October in Queensland thanks to the sea breezes that develop over the Cape York Peninsula. (credit:Daniela Mirner Eberl)
Thundersnow(18 of18)
Open Image Modal
Thundersnow burst into the consciousness of the British public when storms battered us from late 2014. As the name suggests, it's snow that falls during a thunderstorm, a rare occurrence caused when cold air passes over a warm sea. Thunderstorms are produced by moist air rising, which hardly ever happens at temperatures low enough to allow snowfall. (credit:ASSOCIATED PRESS)

"As that heavy rain eases off into the evening brighter spells will develop but there could be further heavy, thundery, if not torrential downpours."

Elsewhere northern England, Northern Ireland, Wales and Scotland will see the best of the weather, as a largely dry and sunny day is forecast.

Meanwhile reports that Britain could experience its coldest winter in 50 years due to the natural phenomenon known as El Nino might be premature, said Mr Hall.

"At the moment we could be in for a strong El Nino event but there is no evidence to back up that we might see a colder winter," he said.