NOAA Models Show Weaker AMOC Cuts North Atlantic Hurricanes as UK Could Cool by 5C
Updated
Updated · Worldatlas.com · Sep 7
NOAA Models Show Weaker AMOC Cuts North Atlantic Hurricanes as UK Could Cool by 5C
2 articles · Updated · Worldatlas.com · Sep 7
Summary
August 2026 NOAA simulations found North Atlantic tropical cyclone activity drops when freshwater forcing weakens the Atlantic overturning circulation, with the sharpest declines in parts of the eastern basin.
The modeled hurricane slowdown came with a horseshoe-shaped Atlantic cooling pattern, drier air and stronger vertical wind shear over the tropical North Atlantic — all conditions that suppress storm formation.
The result strengthens earlier IPCC guidance that substantial AMOC weakening would likely reduce Atlantic cyclone numbers, because NOAA tracked individual simulated storms rather than inferring risk from background conditions alone.
The same circulation decline is linked in other recent models to wider disruptions, including about 5C less warming in the UK than otherwise expected, drier European summers, weaker monsoon and Sahel rains, and higher sea levels along the U.S. Northeast coast.