One of the strongest storms in modern history is to pump the North Atlantic and Western Europe with massive waves and hurricane winds. The system’s name is Dennis and it comes less than a week after the Ciara storma British Airways flight to a new transatlantic speed record above 800 mph.
Dennis is massive and extends over 3,000 miles in width from eastern Canada to Scandinavia. Betemot’s pressure dropped to 920 millibars near Iceland this weekend, in line with the most intense hurricanes, including Hurricane Maria 2017 and Hurricane Katrina in 2005.
The lower the millibars – a measure of atmospheric pressure – the stronger the storm, and Dennis’s barometric pressure is only 7 millibars less than the record-breaking non-tropical Atlantic storm of 1993.
On Friday and Saturday, the wind gusts in Iceland reached well above hurricane power, clocking in at an astonishing 256 km / h or 159 mph.
The storm has since weakened, but still shakes Scotland and Ireland with winds of up to 75 km / h along with heavy rain and intense street flooding.
All weekend, the average wave heights in the North Atlantic ranged from 40 to 60 feet, with rogue waves peaking easily 100 feet.
A relentless attack by foamy surf made the streets of northern France a whirlpool.
The storm system has stalled over the North Atlantic in recent weeks. It is part of a massive parent vortex that travels along the jet stream and feeds itself by swallowing smaller systems. This constant supply of energy, and the proliferating circulation, have driven some almost record-setting jet streams.
The upper level of the jet stream winds has reached 270 mph, providing a supercharged tailwind for flights traveling east. For the second weekend in a row, flights from the United States to Europe have clocked speeds over 800 km / h and reach their destinations more than an hour early.
Stormy weather will continue through Tuesday with Dennis gradually phasing out at midweek.
Source -> https://www.cbsnews.com/news/storm-dennis-second-massive-storm-in-two-weeks-hits-north-atlantic-and-western-europe-2020-02-16/