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36 Pit Fire - Air Quality Report and Outlook for 9/18/14

36 Pit Fire
Air Quality Report and Outlook for 9/18/14
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. 
36 Pit Fire Report (prepared by Mike Broughton, Air Resource Advisor)­­­­­

Air Quality Outlook (Particulate Matter less than 2.5 µm in diameter)
Thursday Afternoon
Sept 18, 2014
Thursday Evening
Sept 18, 2014
Sept 19, 2014
Saturday Outlook
Sept 19, 2014
Moderate to USG AM
Good PM
Hwy 26 Corridor
(Sandy to Rhododendron)
Moderate AM
Good PM
Moderate to USG
Willamette Valley
Moderate (some smoke in the air aloft)

AQI Index (µg/m3)
Potential Health Impacts
Actions to Protect Yourself
Good (0-12)
Air quality is satisfactory and poses little or no health risk.

Moderate (13-35)
Air quality is acceptable for most. There may be moderate health concern for a small number of sensitive people.
Unusually sensitive people should consider reducing prolonged or heavy outdoor exertion.
Unhealthy for Sensitive Groups (36-55)
Members of sensitive groups may experience health effects. The general public is not likely to be affected.
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.
Everyone may begin to experience more serious health effects.
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.
Very Unhealthy
Triggers a health alert, meaning everyone may experience more serious health effects
Everyone should avoid any outdoor exertion; people with respiratory or heart disease, the elderly and children should remain indoors.
For more information see the Oregon Smoke blog:
Air Quality data can be viewed at: