Storm Barra was a December 2021 hurricane-force extratropical bomb cyclone in the northern Atlantic Ocean that impacted Ireland and the United Kingdom with damaging gusts and heavy rainfall. Barra was also the reason for one of Navarre in Spain's worst floods in two decades. A surface low first developed over the Atlantic Ocean, which would eventually become Barra. This system rapidly intensified owing to approaching Ireland, bottoming from 1,010 to 956 hectopascals (29.8–28.2 inHg) in just 24 hours. It then impacted the country, before weakening and moving through the United Kingdom. As it entered the North Sea, it further degraded and was absorbed by the frontal system of "Justus", an extratropical cyclone named by the Free University of Berlin (FUB).