Thursday
August 20, 2015
Shasta-Trinity & Six Rivers Complexes Mike Broughton
Forecast conditions represent impacts from smoke. Contributions from ozone and other pollutants
are not reflected.
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Smoke Synopsis:
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A weak low pressure trough is moving through the
northwest, bringing with it an increase in onshore flow at and near the coast
and slightly better smoke dispersion over inland areas. While this is not expected to be
significant enough to clear out the extremely impacted valleys, most areas
should see at least some minor improvement in air quality, especially during
afternoon hours today and Friday as smoke drifts more to the east. High pressure is expected to develop on
Saturday, with a shift in smoke transport to the west early Saturday morning,
then shifting again to send smoke to the northeast late Saturday into Monday.
Again, coastal sections will experience a more
typical marine influence, again keeping smoke out of the immediate areas but
may present a visibility problem on roads where the moist marine air may mix
with inland valley smoke. The deep
inland valleys are still expected to remain impacted with dense smoke through
the next couple days, although there has been some relief in the Hoopa area,
but still Very Unhealthy in the valleys further south. Hazy, smoky skies should be expected the
next couple days, even in areas where the actual air quality is not
unhealthy.
Fire behavior remains moderately active, and may
pick up a bit today and Friday as the ventilation improves.
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Air Quality Outlook: Shasta-Trinity & Six Rivers Complexes
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Site
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Thursday
August 20, 2015
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Friday
August 21, 2015
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Saturday
August 22, 2015
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Comments
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Crescent City
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Moderate
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Good
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Good
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May
be a couple hours of poor air quality in the morning before improving before
noon.
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Gasquet
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Moderate
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Moderate
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Moderate
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Happy Camp
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Unhealthy
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USG
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USG
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Etna
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Unhealthy
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USG
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USG
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Mt. Shasta
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Moderate
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Moderate
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Moderate
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Tulelake
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Moderate
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Good
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Good
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Yreka
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USG
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Moderate
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Good
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Eureka
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Moderate
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Good
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Good
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Reduced
visibility is possible on inland valley roads where smoke and coastal
moisture mix.
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Hoopa
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Unhealthy
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USG
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USG
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Mad River/Dinsmore
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Very Unhealthy
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Very Unhealthy
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Unhealthy
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Improving conditions
possible Friday afternoon.
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Orleans
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USG
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USG
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Unhealthy
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Improving conditions
possible Friday afternoon.
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Weitchpec
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USG
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USG
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Unhealthy
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Improving conditions
possible Friday afternoon.
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Willow Creek
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Very Unhealthy
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Very Unhealthy
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Very Unhealthy
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Improving conditions
possible Friday afternoon.
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Burnt Ranch
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Very Unhealthy
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Very Unhealthy
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Very Unhealthy
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Improving conditions
possible Friday afternoon.
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Hayfork
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Hazardous
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Very Unhealthy
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Very Unhealthy
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Improving conditions
possible Friday afternoon.
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Hyampom
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Hazardous
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Very Unhealthy
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Very Unhealthy
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Improving conditions possible
Friday afternoon.
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Weaverville
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Very Unhealthy
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Very Unhealthy
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Very Unhealthy
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Improving conditions
possible Friday afternoon.
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Anderson/Redding
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Moderate
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Moderate
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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
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Actions to Protect Yourself
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Good
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None
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Moderate
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Unusually sensitive people
should consider reducing prolonged or heavy outdoor exertion.
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Unhealthy for Sensitive
Groups - USG
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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
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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
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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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Hazardous
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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
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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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