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36 Pit Fire
Air Quality Report and Outlook for 9/18/14
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A weakening low pressure trough will
slowly move through the area today, keeping humidities high and winds mostly
from the west wind. Firefighters are
continuing the aggressive attack today and smoke impacts are expected to be
limited to the eastern and northeastern sections of Clackamas County. Light winds overnight may result in
localized smoke impacts down the Clackamas River Valley into Estacada Friday
morning. Winds on Friday should be
light, with smoke impacts primarily noticed within 10-15 miles of the 36 Pit
Fire. Friday night, winds will swing
from west through north and then become easterly, pushing smoke towards Molalla
and into the Willamette Valley on Saturday as temperatures rise and the air
and fuels dry out. The smoke this weekend is NOT expected to be
as noticeable as last weekend’s impacts.
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36 Pit Fire Report
(prepared by Mike Broughton, Air Resource Advisor)
Air Quality Outlook (Particulate
Matter less than 2.5 µm in diameter)
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Site
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Thursday Afternoon
Sept 18, 2014
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Thursday Evening
Sept 18, 2014
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Friday
Sept 19, 2014
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Saturday Outlook
Sept 19, 2014
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Estacada
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Moderate
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Moderate
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Moderate
to USG AM
Good PM
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Good
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Hwy 26 Corridor
(Sandy to Rhododendron)
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Moderate
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Moderate
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Moderate
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Good
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Molalla
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Good
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Good
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Moderate
AM
Good PM
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Moderate to USG
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Willamette Valley
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Good
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Good
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Good
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Moderate (some smoke in
the air aloft)
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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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