Forecast conditions represent impacts from smoke. Contributions from ozone and other pollutants
are not reflected.
Smoke Synopsis: (revised 1040 am)
|
Yesterday smoke remained entrenched in most of
the deep Humboldt and Trinity County river valleys, conditions which are
expected to persist through Wednesday afternoon. The ridge of high pressure continues to sit
over northern California, again limiting smoke dispersion from area fires
until late afternoon. A weak upper-air
low pressure trough will begin to affect the area late Wednesday, with a bit more
clearing and smoke dispersion through Friday before the high pressure ridge
returns for the weekend.
Coastal sections may see a return of a marine
layer today and tomorrow, enhanced with the fine smoke particles, but inland
valleys are expected to remain choked by residual and newly produced smoke. The
northern Sacramento Valley and western Siskiyou County should also begin to
see some increased smoke impacts, while smoke aloft will be evident over much
of the rest of northern California.
Fire behavior increased a little Monday afternoon
in extremely hot and dry conditions, which is also expected to persist the
next couple days.
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Air Quality Outlook: Shasta-Trinity & Six Rivers Complexes
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Site
|
Tuesday
August 18, 2015
|
Wednesday
August 19, 2015
|
Thursday
August 20, 2015
|
Comments
|
Crescent City
|
Moderate
|
Moderate
|
Good
|
|
Gasquet
|
Moderate
|
Moderate
|
Moderate
|
|
Happy Camp
|
Unhealthy
|
Unhealthy
|
Moderate
|
|
Etna
|
Unhealthy
|
Unhealthy
|
Moderate
|
|
Mt. Shasta
|
Moderate
|
Moderate
|
Moderate
|
|
Tulelake
|
Moderate
|
Moderate
|
Good
|
|
Yreka
|
Moderate
|
Moderate
|
Moderate
|
|
Eureka
|
Moderate
|
Moderate
|
Moderate
|
Some
inland canyons may see higher concentrations of smoke.
|
Hoopa
|
Very Unhealthy
|
Very Unhealthy
|
Very Unhealthy
|
|
Mad River/Dinsmore
|
Very
Unhealthy
|
Very
Unhealthy
|
Very Unhealthy
|
|
Orleans
|
Unhealthy
|
Unhealthy
|
Unhealthy
|
|
Weitchpec
|
Unhealthy
|
Unhealthy
|
Unhealthy
|
|
Willow Creek
|
Hazardous
|
Hazardous
|
Very Unhealthy
|
Worst
conditions in the early afternoon, improving towards evening.
|
Burnt Ranch
|
Hazardous
|
Hazardous
|
Very Unhealthy
|
Conditions
improve mid-afternoon into the evening hours.
|
Hayfork
|
Hazardous
|
Hazardous
|
Hazardous
|
Conditions tend to worsen as
the morning progresses, then improve throughout the afternoon into early
evening.
|
Hyampom
|
Hazardous
|
Hazardous
|
Hazardous
|
Worst conditions in the
morning, improving by mid-afternoon into the early evening.
|
Weaverville
|
Unhealthy
|
USG
|
USG
|
Best in the afternoon.
|
Anderson/Redding
|
Moderate
|
Moderate
|
Moderate
|
|
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.
|
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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