Corral Complex Air Quality Report August 18-19, 2013
Incident: Corral Complex Wildfire
Yesterday, August 17, 2013
Smoke production from the Butler Fire, and Salmon River Complex was low; production from the Corral Complex was moderate. Air quality impacts to Happy Camp, Somes Bar, Weitchpec, Hoopa, and Willow Creek were minimal. Etna, Ft. Jones, Yreka, and Orleans saw moderate impacts late in the day. Sawyers Bar and Forks of Salmon air quality remained in the very unhealthy range.
Sunday, August 18, 2013
Smoke from the Corral complex, Butler fire, and Salmon complex will cover most of Northern California. Smoke from Oregon’s fires will impact coastal regions. Fire growth has been moderate; however, smoldering fuels are still producing enough smoke to fill the drainages. For communities south of the fires—Weitchpec, Hoopa, Willow Creek, Cecilville, The Cedars, Burnt Ranch, and Trinity Center—smoke impacts will range from light haze to moderate levels. Smoke levels in Etna, Ft. Jones and Yreka will peak at moderate to unhealthily for sensitive groups in the evening hours after spending most of the day in the good to moderate range. Sawyers Bar and Forks of Salmon will again see the highest PM2.5 concentration levels, peaking in the very unhealthy to hazardous range. Smoke will drain down the South Fork of the Salmon, affecting communities in the Cecilville and Callahan areas. Somes Bar and Orleans will see moderate smoke impacts in the afternoon with some clearing late in the day. Crescent City will see smoke from the Oregon fires; however, impacts will be light, peaking in the moderate range.
Monday, August 19, 2013
Morning smoke will linger a bit longer due to lighter surface and transport winds. Air quality levels in Sawyers Bar and Forks of Salmon will peak in the very healthy levels. Late in the day smoke will lift and flow south. Air Quality in Willow Creek, Hoopa and Weitchpec hovers between moderate and unhealthily for sensitive groups due to north-northeast surface winds. Smoke from the Butler fire will drain down the New River towards the communities of Denny and Burnt Ranch, which will see moderate smoke impacts for short periods throughout the day. Orleans and Somes Bar air quality will be in the moderate range most of the day. Happy Camp’s air quality will be in the good range most of the day with an hour or two in the moderate range. Etna, Ft Jones and Yreka air quality improves slightly, but by late afternoon the AQI will get into the moderate range for a short period, clearing by morning.
Over the next couple of days wind direction will become light and variable; dominate winds will be terrain driven. This pattern will continue through the weekend, due to the close upper level low off the coast. The low will start to move on-shore Tuesday or Wednesday, possibly bringing more lightning and rain to the region. A return to south-southwest winds will occur after the low moves northeast late next week. With the weaker winds, atmospheric dispersion will decrease, reducing smoke transport, and increasing the chance for poor air quality.