Updated 1100am MDT Thursday,
July 9, 2015
Valid through Noon MDT
Friday, July 10, 2015
Smoke Outlook
Air quality is
forecast to remain in the Good to Moderate air quality category across the
state, although short term readings will be higher in the Clearwater drainages
and across the Idaho Panhandle from Benewah County north. Conditions have improved across the state in
comparison to yesterday’s data. Currently
there are no Air Quality Alerts issued by DEQ.
Northern Idaho is
under an upper level ridge pattern today with stagnant atmospheric
conditions. This will limit regional
impacts but also serve to heighten the impacts of local, low-level smoke
already entrained within the area. It is
unlikely to lift much today as the ridge persists through this afternoon. The convective systems have weakened through
the evening and are thus unlikely to fire off any storms today over the
Panhandle or Clearwater drainages, so similar conditions to yesterday will
likely occur. Tomorrow looks to be a
favorable day to mix smoke out of the region via rain scouring and convective
lift associated with afternoon thunderstorms.
Southern Idaho will be influenced with scattered, wet thunderstorms that
will develop across much of the Snake River Plain this afternoon, particularly
across the Southern and Southeast Highlands.
Surface winds will be from the east-southeast in the southwest and
southwest across the Upper Snake River Plain at 5-10 mph today. Near thunderstorms, expect wind gusts up to 50
mph with erratic wind directions.
Similar conditions are expected through Friday.
The strongest smoke
impacts are occurring across the Idaho Panhandle and through the Hells Canyon
and Clearwater drainages. This will
continue in the afternoon and evening today the upper level ridge limits
dispersion and movement in central and northern Idaho. Light impacts will also occur in the Lower
Snake and Southern Highlands as smoke from fires burning in the Salmon River
Mountains and Oregon drift into the region.
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
|