Storm Éowyn, described as a weather bomb by Météo France, will bring very unsettled weather to the north-west of France between late night and early afternoon on Friday with violent winds and heavy rain.
After Ireland, the north of England and Scotland, France will be affected by storm Éowyn between late night and early afternoon on Friday. The winds may sometimes exceed 80 to 90 km/h on the Breton and Normandy coasts, and as far as Pas-de-Calais and the rains will be significant in the north-west of the country.
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Rainfall accumulations will need to be monitored, particularly between Brittany, Pays de la Loire and Normandy where we can have up to 40 to 50 mm locally, warns Météo France. A special storm since it has been described as a meteorological bomb.
-An explosive cyclogenesis
A weather bomb, also known as explosive cyclogenesis, is a meteorological phenomenon characterized by a rapid and significant drop in atmospheric pressure within a depression. For a depression to qualify as a weather bomb, the central pressure must drop by at least 24 hectopascals (hPa) in less than 24 hours. “This is the case for Éowyn, with the pressure expected to increase from 970 hPa on Thursday at 12:00 UT to 940 hPa on Friday at 6:00 UT when it passes just to the north of Ireland. It is usual in this kind of configuration to speak of a “meteorological bomb”, specifies the meteorological institute.
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This drop in pressure often leads to extreme weather conditions, such as high winds, heavy precipitation, and storms. This term weather bomb is often used to describe storms that are particularly powerful but are not necessarily linked to tropical events like hurricanes.
