An Excessive Heat Warning continues in the Northwest U.S. stretching into parts of California and north to Calgary by tomorrow. Seattle, Portland and Spokane will break all-time records for the June 27-July 6 stretch.

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.