NOAA officially said we are in a La Niña earlier today. This map shows winter (Dec-Feb) temperature departures during 15 moderate La Niña events (Nino 3.4 region -0.75°C to -1.25°C below normal). Note: 30-year trailing climatology used (not static period). pic.twitter.com/tYNhs3KFmB

— Brian Brettschneider (@Climatologist49) September 11, 2020