Updated
10am MDT Wednesday, August 17, 2016
Valid
through Noon MDT Thursday, August 18, 2016
Smoke
Outlook
Air
quality is forecast to continue to remain in the Good to Moderate air quality
category across the state today with higher readings across Boise County,
Blaine County, and Camas County due to the proximity and drainage of the
Pioneer Fire. Current elevated DEQ
monitors include Boise, Idaho City, Garden Valley, and Franklin which are all
in the MODERATE category. Ketchum is
currently reading in the UNHEALTHY category.
A
minor disturbance will pass through the upper level ridge today, providing a
chance for showers along the extreme ID/NV border and across parts of the
Central Idaho Mountains this afternoon. A cold front passing through northern Idaho
will allow for a slight chance of isolated thunderstorms this afternoon across
the northern Panhandle. Due to the ridge
pattern, inversions will be quite slow to mix out due to the warm
mid-layers. Wind speeds will be in the 5-10
mph range from west-northwest with southwest winds over the Upper Snake Plain
and within the Purcell Trench. Mixing
heights will range from 2,000 feet AGL to 9,000 feet AGL. Winds will increase dramatically tomorrow
across the northern Panhandle as a second front moves through in the
afternoon. Generally, wind speeds will
be higher across all of Idaho with a strong northerly component across central
and north Idaho while northwest to southwest winds at 8-12 mph will be present
across southern Idaho.
Because the overall weather pattern has not
varied greatly, smoke impacts today are expected to continue to be local in
nature and similar to the pat few days. Smoke
from the Pioneer Fire will drain into the Upper Treasure Valley this morning
with locally heavy impacts within the drainage corridors including Garden
Valley and Idaho City before lifting and dispersing to the southeast where it
will continue to affect the Ketchum area within the Big and Little Wood
drainages. Tonight, drainage smoke will again enter the entire Treasure Valley,
reaching farther west than previously experienced, as well as the Northern
Magic Valley and Ketchum/Sun Valley area.
On Thursday, the Lower Treasure Valley will see transport of lift,
lofted smoke from fires burning in eastern Oregon as well as continued impacts
from the Pioneer Fire in the morning.
Once the inversion lifts, stronger surface and transport winds will move
the smoke farther east towards the Middle Snake River Plain and Arco Desert.
DEQ Air Quality Forecast and Cautions:
- The Boise Regional Office has extended a Stage 1 Air Quality
Forecast and Caution for Boise County. Valid through Wednesday,
August 17th at 3:00 p.m.
- The Twin Falls Regional Office has issued a Stage 1 Air Quality
Forecast and Caution for Blaine and Camas Counties. Valid through
Wednesday, August 17th at 1:00 p.m.
The USFS installed monitors near Stanley, Idaho and
Lowman, Idaho. Idaho DEQ has installed temporary monitors in Fairfield
and Boise (Garden City), Idaho. The information can be found at http://smoke.airfire.org/monitoringReport/#/?date=LATEST&productType=plotTable.
·
Stanley, ID monitor is Stanley-Idaho
75
·
Lowman, ID monitor is
Lowman-Jolene Drive
·
Fairfield, ID monitor is
Fairfield-Soldier Road
·
Boise, ID monitor is
Garden City-Alworth Street
Smoke forecasts are dependent on predicted fire growth and weather. If conditions change unexpectedly, impacts could occur. When visibility starts to go below 5 miles, sensitive groups should minimize outdoor activities. Everyone else should minimize prolonged or physical activity outdoors. Visit the Idaho Smoke Blog for more information at http://idsmoke.blogspot.com/
Your eyes are your best tools to determine if it’s safe to be outside. Even if you smell smoke, the air quality may still be good.
AQI Category
Visibility (miles)
Good
11+
Moderate
6-10
Unhealthy for Sensitive Groups
3-5
Unhealthy
1½ -2¾
Very Unhealthy
1-1¼
Hazardous
Less than 1
How to estimate air quality based on visibility for areas without an air quality monitor or airport visibility estimate:
a. Face away from the sun.
b. Determine the limit of your visible range by looking for targets at known distances (miles).
c. Visible range is when an object you can easily see in the distance disappears.
d. Use the visibility values above to determine the local wildfire smoke category.
Updated
10am MDT Wednesday, August 17, 2016
Valid
through Noon MDT Thursday, August 18, 2016
Smoke
Outlook
Air
quality is forecast to continue to remain in the Good to Moderate air quality
category across the state today with higher readings across Boise County,
Blaine County, and Camas County due to the proximity and drainage of the
Pioneer Fire. Current elevated DEQ
monitors include Boise, Idaho City, Garden Valley, and Franklin which are all
in the MODERATE category. Ketchum is
currently reading in the UNHEALTHY category.
A
minor disturbance will pass through the upper level ridge today, providing a
chance for showers along the extreme ID/NV border and across parts of the
Central Idaho Mountains this afternoon. A cold front passing through northern Idaho
will allow for a slight chance of isolated thunderstorms this afternoon across
the northern Panhandle. Due to the ridge
pattern, inversions will be quite slow to mix out due to the warm
mid-layers. Wind speeds will be in the 5-10
mph range from west-northwest with southwest winds over the Upper Snake Plain
and within the Purcell Trench. Mixing
heights will range from 2,000 feet AGL to 9,000 feet AGL. Winds will increase dramatically tomorrow
across the northern Panhandle as a second front moves through in the
afternoon. Generally, wind speeds will
be higher across all of Idaho with a strong northerly component across central
and north Idaho while northwest to southwest winds at 8-12 mph will be present
across southern Idaho.
DEQ Air Quality Forecast and Cautions:
- The Boise Regional Office has extended a Stage 1 Air Quality
Forecast and Caution for Boise County. Valid through Wednesday,
August 17th at 3:00 p.m.
- The Twin Falls Regional Office has issued a Stage 1 Air Quality
Forecast and Caution for Blaine and Camas Counties. Valid through
Wednesday, August 17th at 1:00 p.m.
The USFS installed monitors near Stanley, Idaho and
Lowman, Idaho. Idaho DEQ has installed temporary monitors in Fairfield
and Boise (Garden City), Idaho. The information can be found at http://smoke.airfire.org/monitoringReport/#/?date=LATEST&productType=plotTable.
·
Stanley, ID monitor is Stanley-Idaho
75
·
Lowman, ID monitor is
Lowman-Jolene Drive
·
Fairfield, ID monitor is
Fairfield-Soldier Road
·
Boise, ID monitor is
Garden City-Alworth Street
AQI Category
|
Visibility (miles)
|
Good
|
11+
|
Moderate
|
6-10
|
Unhealthy for Sensitive Groups
|
3-5
|
Unhealthy
|
1½ -2¾
|
Very Unhealthy
|
1-1¼
|
Hazardous
|
Less than 1
|
How to estimate air quality based on visibility for areas without an air quality monitor or airport visibility estimate:
a. Face away from the sun.
b. Determine the limit of your visible range by looking for targets at known distances (miles).
c. Visible range is when an object you can easily see in the distance disappears.
d. Use the visibility values above to determine the local wildfire smoke category.
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