Air
Quality Summary Report - Pioneer Fire For: Sunday, September 4, 2016
ARA: Mark Fitch (mark_fitch@nps.gov) ARA
(T): Eric Dobbs (eric.dobbs@freshfromflorida.com)
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FIRE,
WEATHER AND SMOKE SYNOPSIS
Weather: Deep-layer moisture will move into the area
today, prompting a good chance for scattered showers this afternoon. The
deepening trough over the Pacific northwest combined with less solar heating
will continue to keep winds relatively weak today. A trough axis will pass through the area,
promoting a dominant northerly component in the winds today with
northeasterly winds in the morning shifting to northerly in the afternoon. Up-canyon
winds will be around 4 – 7 mph after 1:00pm while ridge winds will be a 8 -12
mph with gusts to 15 mph over exposed ridges; these winds will shift between northeasterly
and northwesterly throughout the day.
Strongest winds in north-to-south oriented valleys. Inversion will break between noon and 1pm. Increased cloud cover will be seen for much
of the day in the area.
Fire Activity: Yesterday, the fire grew 765 acres putting the current
interpreted size to 181,065 acres. Higher
RH values and increased cloud cover will help lower fire activity today. Rising dew point temperatures this
afternoon will increase surface RH values.
The most active fire activity will be seen north of HWY 17 and HWY 21
in the Clear Creek, Deadwood, and Bear Valley drainages. Grass and shrub
fuels will be active for uphill runs in valley locations. Wind/slope alignment will result in moderate
spread rates; however significant spread rates are not expected. Tomorrow,
slightly drier conditions are expected which will likely marginally increase
the fire activity for tomorrow.
Smoke Summary: Smoke will
concentrate in the low valleys this morning and mix down to the surface for
much of the day. Increased cloud cover
will decrease the chances of clearing out this afternoon due to less mixing
in the lower levels. Smoke will begin
to settle into the valleys with the biggest impacts for areas northeast, east,
and directly south of the fire. Today, the most significant smoke impacts
will be to Lowman, Stanley, and Garden Valley.
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Air Quality Outlook (smoke related)
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Sites with air quality monitors (based
on concentration PM 2.5 µg/m^3 24-hr avg.)
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Site
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Yesterday
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Today
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Tomorrow
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Comments
for Today (9/4/16)
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Fairfield
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Good
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Good
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Good
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Possible haze in the mid to late morning. Clearing after inversion lift.
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Garden
City
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Good
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Good
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Good
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Possible haze in the mid to late morning. Clearing after inversion lift.
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Garden
Valley School & ICP/Helibase
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USG
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USG
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Moderate
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Highest concentrations in early to mid afternoon.
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Idaho
City
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Good
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Moderate
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Moderate
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Elevated surface concentrations in the morning and
mid afternoon, clearing by early evening.
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Ketchum
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Good
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Good
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Moderate
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Mostly clean air throughout the day with possible
high-level haze.
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Meridian
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Good
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Good
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Good
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Possible haze in the mid to late morning. Clearing after inversion lift.
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Nampa
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Good
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Good
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Good
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Possible haze in the mid to late morning. Clearing after inversion lift.
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Lowman
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Unhealthy
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Unhealthy
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USG
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Elevated concentrations throughout gradually
decreasing by late afternoon.
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Stanley
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Moderate
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Moderate
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Moderate
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Increasing smoke over the next couple of days in
morning and early afternoon hours
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Salmon
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Good
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Good
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Moderate
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Mostly clear conditions today.
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Sites without a monitor
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Site
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Today
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Tomorrow
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Comments
for Today
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Lucky
Peak Rec. Area
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Moderate
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Moderate
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Possible hazy conditions in the mornings today and
tomorrow due to the push from northerly flow.
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Centerville
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Moderate
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Moderate
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Morning and early afternoon smoke impacts.
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USG – Unhealthy for Sensitive Groups
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