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Category: Air quality

Tehuano gap wind event

As a strong arctic cold front moved southward across the Gulf of Mexico toward southern Mexico on 29-30 December 2025 (surface analyses), the cold front fractured as it moved inland across the Isthmus of Tehuantepec — the cold air was then channeled southward through Chivela Pass and emerged as a Tehuano... Read More

Wildfires rage in Pacific Northwest

Driven by a dry summer, numerous fires have been ignited in the Pacific northwest of the United States and far southwestern Canada. These fires were largely ignited by lightning from late summer storms, but continued drying in the area has both increased susceptibility to fire while also preventing rain from... Read More

Midwest Air Clearing Out, but Smoke Headed Northeast

Elevated smoke levels have been present in the upper Midwestern United States for well over a week, but recent synoptic-scale pattern shifts have started to bring in clearer (albeit warmer and more humid) air from the south. The following animation shows GOES-19-observed aerosol optical depth (AOD) for 1400 UTC (9:00... Read More