Drier conditions allowed crews to make
good progress initiating the burn out operation the fireline perimeter on the
ridge West of the town of Oakridge. About one mile of fireline was made safer
as a result of this burn out operation. Some of this smoke was captured by the
monitors in Westfir and Oakridge around 9 pm last night as cool nighttime air
flowed down slope into the lower drainage.
Today, firing crews will continue
burnout operations to strengthen lines on the perimeter west of Oakridge. The smoke from the burnout operation is
forecast to disperse to the south and southwest away from Oakridge and Westfir,
however, we anticipate some smoke to mix into the Oakridge communities this
morning following the inversion break around 10 am. We forecast the air quality to reach “Unhealthy for Sensitive Groups” this
morning with gradual improvement through daytime warming, atmospheric
instability and Northeast to East winds this afternoon and evening.
The communities of Cottage Grove and Roseburg
may begin to see some smoke this afternoon.
Air Quality Forecast for Thursday (Particulate Matter less than 2.5 µm in diameter)
|
Site
|
Thursday Morning
Sep 4, 2014
|
Thursday Afternoon
Sep 4, 2014
|
Thursday Evening
Sep 4, 2014
|
|
Oakridge
|
Unhealthy for Sensitive Groups
|
Moderate
|
Good
|
|
Westfir
|
Unhealthy for Sensitive Groups
|
Moderate
|
Good
|
|
Dexter
|
Good
|
Good
|
Good
|
24 hour average PM 2.5 emissions dispersion Thursday 9/4/14
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