Air Quality Report
Incident: Forks Complex (includes Butler Fire ) Wildfire
Yesterday, August 14, 2013
Air quality impacts continue to occur at about the same time within communities each day. Stronger southwest winds have caused those impacts to increase in most areas. Somes Bar, Hoopa, and Happy Camp were impacted in the early afternoon. Smoke in Somes Bar and Happy Camp was heavier than past days, increasing to the unhealthy ranges; Hoopa saw lighter smoke than past days. Etna, Fort Jones, and Yreka were impacted in the early evening, bringing air quality down to the moderate to unhealthy for sensitive groups range. Smoke from the Corral Complex, Butler Fire, and Salmon River Complex combined to continue serious smoke impacts in Sawyers Bar, and Forks of Salmon throughout the day.
Thursday, August 15, 2013
The smoke will clear in Yreka by 8:00 am; however by early afternoon smoke will start to roll in once again. Etna and Ft. Jones will remain in the moderate range through the morning hours, PM2.5 concentrations will start to increase around 1:00 pm with AQI levels reaching unhealthy for sensitive groups. Happy Camp will see air quality levels in the moderate AQI most of the day, peaking in unhealthy for sensitive groups for an hour or two in the afternoon. Somes Bar and Orleans’ morning air quality will be moderate, clearing by 1:00 pm, and hovering in the good to moderate levels all day. Hoopa and Willow Creek will only see light haze; the southwest winds are helping to keep the air quality in the good range. Sawyers Bar and Forks of Salmon saw very unhealthy to hazardous AQI levels yesterday; this will not change over the next 24 hours; as the smoke lifts during the day the air quality will be in the unhealthy for sensitive groups range. Of note is smoke starting to drift south of Forks of Salmon with impacts to the Cecilville area. If the north winds materialize this weekend or next week, this area is likely to see greater impacts.
Friday, August 16, 2013
With strong to moderate southwest transport winds Hoopa and Willow Creek will have good air quality. Happy Camp, Etna, Ft. Jones and Yreka will be in the moderate AQI range most of the day with a few hours reaching unhealthy for sensitive groups. Of concern are Sawyers Bar and Forks of Salmon as they will see unhealthy for sensitive groups for most of the day, reaching the very unhealthy AQI levels during the night.
Over the next couple of the days south to south-west transport winds will help to keep the air quality in the moderate range. Towards the end of the week the winds will weaken and switch to the east to north northeast. With the weaker winds, atmospheric dispersion will decrease, reducing smoke transport, and increasing the chance for poor air quality.
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