Moderate Ozone AQI Levels in the Eastern US; Code Red AQI in San Bernandino, CA; Smoke over Canada and Atlantic Ocean

Figure 1. Airnow AQI Loop for July 17, 2019.

The Airnow animation above shows Moderate (Code Yellow) AQI levels along the Eastern US (Figure 1) as a surface high pressure system sets up over this region, and its associated light winds and high temperatures enhance ozone production. Code Yellow Ozone AQI levels were also reported in the Southwestern US, but Unhealthy (Code Red) AQI levels were experienced in locations along San Bernandino, CA (Figure 2).

NOAA’s Hazard Mapping System Fire and Smoke Product (Figure 3) reported the presence of smoke from several wildfires in Alaska blowing east into Canada as well as smoke from Canadian fires over Maine and extending into the Atlantic Ocean.

Figure 3. NOAA Hazard Mapping System Fire and Smoke Product for July 17, 2019


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