Prepared by Chuck Sams, Dan Chan and Mike Broughton
Forecast conditions represent impacts from smoke. Contributions from ozone and other pollutants
are not reflected.
Smoke Synopsis:
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On Sunday, based on 24-hour averages, Hyampom
reported “Hazardous” conditions. Hayfork
reported “Very Unhealthy” conditions.
Burnt Ranch, Mad River/Dinsmore and Weaverville reported “Unhealthy”
conditions. Willow Creek, Hoopa,
Orleans, and Etna reported “USG” conditions.
However, for a few hours on Sunday, stations in Trinity County
measured very high level (i.e.. over 250 µg/m3) of PM2.5 concentration and
this usually happens in early afternoon before daytime mixing occurs. Air quality is not likely to improve before
Wednesday when an upper level trough moves through the area.
Today/Tomorrow:
Smoke dispersion will be limited due to weak transport wind over the
area. Smoke will be the worst in early afternoon. PM2.5 stations in Trinity County may
measure very high level of PM2.5 concentration during this time period. Air quality should improve somewhat after
daytime mixing begins. But, after
sunset, air quality will deteriorate until day time mixing begins the
following day.
Wednesday:
Transport wind speed will increase slightly on Wednesday, which may
help with smoke dispersion.
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Air Quality Outlook: Shasta-Trinity & Six Rivers Complexes
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Site
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Monday
August 17, 2015
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Tuesday
August 18, 2015
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Wednesday
August 19, 2015
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Comments
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Crescent City
|
Moderate
|
USG
|
Moderate
|
|
Gasquet
|
Moderate
|
USG
|
USG
|
|
Happy Camp
|
Moderate
|
Moderate
|
Moderate
|
|
Etna
|
Moderate
|
Moderate
|
Moderate
|
|
Mt. Shasta
|
Moderate
|
Good
|
Moderate
|
|
Tulelake
|
Good
|
Good
|
Good
|
|
Yreka
|
Moderate
|
Moderate
|
Moderate
|
|
Eureka
|
Moderate
|
Unhealthy
|
Moderate
|
8/17:
Heaviest before midnight
8/18:
Heaviest late afternoon
|
Hoopa
|
USG
|
Unhealthy
|
USG
|
Worst
conditions usually occur early afternoon
|
Mad River/Dinsmore
|
Unhealthy
|
Unhealthy
|
USG
|
Worst
conditions usually occur early afternoon
|
Orleans
|
USG
|
Unhealthy
|
USG
|
Worst
conditions usually occur early afternoon
|
Weitchpec
|
USG
|
Unhealthy
|
USG
|
Worst
conditions usually occur early afternoon
|
Willow Creek
|
USG
|
Unhealthy
|
USG
|
Worst
conditions usually occur early afternoon
|
Burnt Ranch
|
USG
|
Unhealthy
|
USG
|
Worst
conditions usually occur early afternoon
|
Hayfork
|
Very Unhealthy
|
Hazardous
|
Hazardous
|
Worst
conditions usually occur early afternoon
|
Hyampom
|
Hazardous
|
Hazardous
|
Hazardous
|
Worst
conditions usually occur early afternoon
|
Weaverville
|
Unhealthy
|
Unhealthy
|
Hazardous
|
|
Anderson/Redding
|
Moderate
|
Moderate
|
Moderate
|
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Disclaimer:
Forecast conditions represent air quality levels affected by fine
particulates; contribution from ozone and other pollutants is not reflected. Conditions may change quickly, these
projections are based on anticipated weather and fire activity. Sensitive groups including individuals with
asthma, lung or heart disease, children, older adults, and pregnant women
should take precautions to avoid exposure to smoke. If you feel as though you are having health
effects from smoke, see your doctor or health professional as needed. In some cases your eyes are your best
tools. If it is smoky outside, you are being impacted. Use caution when driving in or around smoky
areas.
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AQI Index
|
Actions to Protect Yourself
|
Good
|
None
|
Moderate
|
Unusually sensitive people
should consider reducing prolonged or heavy outdoor exertion.
|
Unhealthy for Sensitive
Groups - USG
|
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.
|
Unhealthy
|
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
|
Everyone should avoid any outdoor exertion; people with
respiratory or heart disease, the elderly and children should remain indoors.
|
Hazardous
|
The following groups should
remain indoors and keep activity levels low: People with heart or lung
disease; children and older adults. Everyone else should avoid prolonged or
heavy exertion
|
Links:
Shasta County Air Pollution Control
District - http://www.co.shasta.ca.us/index/drm_index/aq_index.aspx
Siskiyou County Air Pollution Control
District http://www.co.siskiyou.ca.us/content/agriculture-air-pollution-control-district
Wildfire Smoke – A Guide for Public Health Official from California Air Resource Board
Wildland Fire Personnel Smoke Exposure Guidebook from National Interagency Fire Center
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