Much comparison has been made of Monday morning’s storm which claimed the lives of four people and 1987. The origin of both storms was down to a combination of a jet streak interacting with a pool of warm air low down. Both storms followed a similar development but clearly 1987 was more optimum. The 1987 storm was slower and further to the west when it developed. This morning’s storm was too much in the jet stream and raced on with less development.
From the forecasts made at the end of last week into the weekend it was about what I expected in terms of intensity – though I thought the peak of the max gusts (47.2mph at 0653) would have been shorter. Rainfall from the event was unremarkable – just 17.5mm which started falling around 9pm on Sunday and stopped around 5am. Totals north of Watford were far greater. This rainfall radar image at 0645 was taken within 10 minutes of the highest gust in Wanstead.
Stations similar to here in Woodford Wells and Laindon all reported maximum gusts of 47-53mph, though with these being sheltered gardens the reality was probably higher – perhaps severe gale force 9 was reached at the storm’s peak here. Andrewsfield, near Braintree, North Essex, recorded 79mph. An animation of the storm’s track clearly shows the path of the sting jet. The Met Office have also released a satellite sequence of events. Of course the storm is no comparison with the Great Storm of October 1987, where a gust of 122 mph was recorded in Gorleston, Norfolk, but this morning’s storm was probably in the top 5 of storms since – and the most potent since the Burns’ Day storm of January 1990.
The tree damage in Wanstead has been worse than I would have expected with a few down on Christchurch Green. My own back yard in Aldersbrook seems to have got off lightly though a small flowering cherry on the corner of Dover Road succumbed. On closure inspection the inside of the trunk was spongy – testament to the fungus that I’d noted had been growing on it recently. Elsewhere, in Wanstead Park, some trees were sadly lost. Friends of Wanstead Park give a brief account of the damage here.
After it left Suffolk the storm raced across the North Sea, still deepening all the while, and caused havoc in Belgium and the Netherlands. Much has been said about the UK media’s obsession with the storm which chiefly affected the south east but Belgian and Dutch news outlets also focussed on the weather. In Brussels people were virtually blown along the street. Falling trees blocked canals in Amsterdam where a cyclist narrowly escaped being hit by a falling tree. There were no reports of deaths across the Channel and some watersports fanatics took full advantage of the wild conditions. The storm, which at one point developed an ‘eye‘, continued its destruction across Germany where this home was almost totally destroyed.
It was the storm that preceded the hottest day of the year when the temperature briefly touched 34C in Wanstead – that’s higher than the official recognised figure of 33.5C at Heathrow and Northolt.
Earlier people all around town and across the country wilted in the heatwave waiting for news on the royal sprog, many of them ignorant that things were about to go bang. But no matter – it’s days like this they say is good to bury bad news – so the weather, it seems, decided to get in on the act too. The first spots of rain fell on an exhausted crack Sky News commentary team outside Buckingham Palace just before midnight. About the same time reports started coming in of thunder in Canning Town and Poplar – but all went quiet after three flashes. Then 11.58pm reports of rain in Luke Howard’s old haunt – Plaistow. My own ride back from town saw reasonably heavy, if somewhat shortlived, rain in Southwark. Yet by the time I reached Aldgate the ground was dry. Things began to liven up again at 1.30am – distant rumbles of thunder getting closer – further reports of multiple thunder, lightning and heavy rain with hail mixed in at 1.45am. Then, bang, the storm hit Wanstead. I failed to get any footage of the event because of the ambient light washing out every shot. Multiple crashes of loud thunder followed by, at one point, dazzling lightning flashes. You know how close a storm is by counting the seconds between lightning and peal of thunder. At 1.51am I barely counted to one between a dazzling flash and one of the loudest cracks of thunder I’ve heard. Only 6.5mm of rain was recorded, though this fell at a rate of 60mm/hr – the highest rate since I put the meteo live online last November. It doubled the previous highest rate! There followed frequent, distant rumblings of thunder to the east along with copious flashes and occasional bursts of rain. Epping recorded 19mm in two storms at 5am and 6.30am. The thunder and oppressive humidity made sleep difficult. And judging by the number of bleary eyes on the school run this morning I wasn’t alone. The were other storms around London and the UK – a notable one in Brixton precipitated this account on Brixton Buzz. And Steve Brice managed to capture the lightning in Gillingham, Kent. Pershore in Worcestershire recorded over 56mm of rain in 3 hours while lightning damaged rail networks. It was one of the most dazzling displays I can remember – certainly the best since probably 2000 if not before. People often ask me what first got me interested in the weather. Until last night I’d almost forgotten that thunderstorms were one of the main attractions. A night to remember – just like the overnight storms in the Eighties I remember as a lad. Scott Whitehead @wanstead_meteo http://www.wansteadweather.co.uk with thanks to @loveloughtonfor storm updates The following charts show the cell well. The 2mb pressure drop, the 60mm/hr rainfall rate, the 2C dive in temperature, and the sudden gust of wind This pressure drop is also reflected in the temperature fall at the same time: 2C in a matter of minutes.