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36 Pit Fire
Sunday PM Update - Air Quality Report for 9/21/14
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Light and variable winds have
characterized this afternoon, as the projected southwest winds have yet to
develop. Consequently, much of today’s
smoke and associated air quality impacts are affecting only the central, eastern
and southeastern portions of Clackamas County. Continued light winds Sunday night should result
in the highest impacts staying within 10-15 miles of the 36 Pit Fire, as well as down the Clackamas River valley. We see no reason to modify the forecast table below. Monday humidities should
increase, with less smoke produced but remaining closer to the ground. Still expecting wetter conditions for later
in the week.
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36 Pit Fire Report
(prepared by Mike Broughton/Janice Peterson, Air Resource Advisors)
Air Quality Outlook (Particulate
Matter less than 2.5 µm in diameter)
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Site
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Sunday
Afternoon
Sept 21, 2014
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Sunday night
Sept 21, 2014
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Monday
Sept 22, 2014
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Tuesday Outlook
Sept 23, 2014
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Estacada
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Moderate
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Moderate early USG late
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USG AM
Moderate PM
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USG AM
Good PM
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Hwy 26 Corridor
(Sandy to Rhododendron)
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Moderate
becoming USG
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Moderate
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Moderate
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Moderate
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Molalla
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Good
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Good
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Good
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Good
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Willamette Valley
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Good (some smoke aloft)
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Good
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Good
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Good
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AQI Index (µg/m3)
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Potential Health Impacts
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Actions to Protect Yourself
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Good (0-12)
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Air quality is satisfactory and poses little or no health
risk.
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None
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Moderate (13-35)
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Air quality is acceptable for most. There may be moderate
health concern for a small number of sensitive people.
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Unusually sensitive people should consider reducing prolonged
or heavy outdoor exertion.
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Unhealthy for Sensitive Groups (36-55)
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Members of sensitive groups may experience health
effects. The general public is not likely to be affected.
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People with heart or lung disease, children and older adults
should reduce prolonged or heavy outdoor exertion. Everyone else
should limit prolonged or heavy exertion.
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Unhealthy
(56-150)
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Everyone may begin to experience more serious health effects.
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The following groups should avoid all physical outdoor
activity: People with heart or lung disease, children and older
adults. Everyone else should avoid prolonged or heavy exertion.
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Very Unhealthy
(151-250)
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Triggers a health alert, meaning everyone may experience more
serious health effects
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Everyone should avoid any outdoor exertion; people with
respiratory or heart disease, the elderly and children should remain indoors.
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