With La Niña helping clear the way for a busy hurricane season, this wide current of warm water could spell disaster for the northern Gulf Coast.
A satellite image of ocean heat shows the strong Loop Current and swirling eddies. Christopher Henze, NASA/Ames
When a tropical storm passes over the Loop Current or one of its giant eddies — large rotating pools of warm water that spin off from the current — the storm can explode in strength as it draws energy from the warm water. Why the Loop Current worries forecastersWarm ocean water doesn’t necessarily mean more tropical storms. But once tropical storms reach waters that are around 78 F or warmer, they can strengthen into hurricanes.
Hurricane Ida’s pressure dropped quickly as it crossed a warm, deep eddy boundary on Aug. 29, 2021. Nick Shay/University of Miami, CC BY-ND
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