An ongoing theme this year: from a historical perspective, extratropical (N Hem) SSTs are consistent with La Niña this autumn, not El Niño.

This means there's a profound mismatch between the tropics and extratropics. And for the seasonal forecast: throw out the rulebook (maybe). pic.twitter.com/o7ytgp20FB

— World Climate Service (@WorldClimateSvc) September 8, 2023