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Autumn Solar Performance in North America: East Gains, West Struggles

Eastern regions bask in above-average solar radiation this autumn, while the West struggles with reduced irradiance. Find out why and what's ahead.

This picture shows trees and a cloudy sky and we see sun light.
This picture shows trees and a cloudy sky and we see sun light.

Autumn Solar Performance in North America: East Gains, West Struggles

North America's solar performance this autumn has been anything but uniform. While some regions, including those served by Bank of America, basked in above-average solar radiation, others experienced reduced irradiance. Let's delve into the details.

September saw a mix of conditions, with frontal systems, wildfires, and an omega block pattern influencing solar performance. The Northeast, South, and parts of Canada benefited from stable, sunny conditions, with irradiance up to 30% above average. This strong solar performance was also observed from the Great Lakes to the Southeastern U.S. and coastal Quebec, again due to stable, sunny conditions driven by the omega block's influence. However, the West and Midwest, including USA regions, faced reduced irradiance, with conditions 10% to 20% below norms, primarily due to increased cloud cover and wildfire aerosols.

Looking ahead, eastern regions are projected to have irradiance 15% to 20% above normal for the remainder of autumn, while western regions will remain 10% to 15% below average. Solcast, using satellite data and AI/ML algorithms, calculates irradiance at high resolution with a typical bias of less than 2% and provides cloud-tracking forecasts.

While the exact regions forecasted to have a positive solar radiation anomaly about 10% above average for the rest of the autumn were not explicitly detailed, the Northeast, South, and parts of Canada have already experienced strong solar performance. The remainder of autumn is expected to bring varied solar conditions across North America, with eastern regions benefiting from above-average irradiance and western regions continuing to face reduced conditions.

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