The North Atlantic basin SSTA is +0.23C and slightly cooler (-0.07C) during the past week. The complexion of the North Atlantic SSTA is nearly opposite of this time last year. The North Atlantic tropics/subtropics are very close to normal in June 2021 while last year SSTA was somewhat warmer than normal.

Suddenly, both the Nino34 and Nino3 (east-central/east equatorial Pacific Ocean) regions cool to the La Nina threshold of -0.5C last week. The cooler SSTA are linked to cooler upper ocean heat in the east-central Pacific last week.

Historic heat continues to worsen the extreme California/Great Basin/Southwest drought region. Longer-term, the anomalous heat and dryness is likely to focus on the Northwest States.

Rainfall required to neutralize dry Palmer Drought Severity Index (PDSI) has increased in the Midwest States, Northeast region and the Southeast particularly Florida. Western deficits maintain their severe dry signatures. The North Dakota deficits eased last week.