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Montana, Butte/Blackfoot Region

Air Quality Alert

Statement as of 9:00 AM MDT on August 18, 2017

Expires 11:00 AM EDT on August 19, 2017


... Air quality alert in effect until 900am MDT Saturday...

The Montana department of environmental quality has issued an air
quality alert for Broadwater, Deer Lodge, Gallatin, Granite,
Jefferson, Lewis And Clark, Mineral, Missoula, Powell, Ravalli, and
Silver Bow counties in effect until further notice due to increased
fire activity in west-central Montana. Fire activity is expected to
remain high under a red flag warning this afternoon. Air quality
impacts are expected to improve briefly this afternoon before
conditions deteriorate this evening. Impacts are most significant in
the Seeley Lake area. Smoke from the Rice Ridge fire is causing
hazardous air quality impacts between midnight and noon. The Missoula
city-County health department recommends residents spend as little
night time as possible in Seeley Lake due to the dangerous overnight
pollution levels. This alert will be updated again at 900am
8/19/2017.

An air quality alert means that particulates have been trending
upwards and that an exceedence of the 24 hour National ambient air
quality Standard (naaqs) has occurred or may occur in the near
future.

As of 900am, particulate levels in Seeley Lake are hazardous

As of 900am, particulate levels in Arlee, Butte, Lolo, and
Philipsburg are unhealthy

As of 900am, particulate levels in Bozeman, Butte, Clearwater,
Drummond, Florence, Rock creek, Hamilton, Helena, and Lincoln are
unhealthy for sensitive groups

As of 900am, particulate levels in Frenchtown, Missoula, and Superior
are moderate

When air quality is hazardous... state and local health officials
recommend that everyone should avoid any outdoor exertion; people
with respiratory or heart disease, the elderly, and children should
remain indoors.

When air quality is unhealthy... state and local health officials
recommend that people with respiratory or heart disease, the elderly,
and children should avoid prolonged exertion; everyone else should
limit prolonged exertion.

When air quality is unhealthy for sensitive groups... state and local
health officials recommend that people with respiratory or heart
disease, the elderly and children should limit prolonged exertion.

When air quality is moderate... state and local health officials
recommend that unusually sensitive people should consider reducing
prolonged or heavy exertion.

For more information visit the Montana department of environmental
quality at www.Todaysair.Mt.Gov




Fire Weather Warning

Statement as of 8:45 PM MDT on August 18, 2017

Expires 11:00 PM EDT on August 19, 2017


... Red flag warning remains in effect from noon to 9 PM MDT
Saturday...

* affected area: fire zone 111 (east beaverhead).

* Impacts: a dry cold front will stall over the area Saturday,
bringing breezy and dry conditions, starting late morning on
the ridges and transitioning into the lower elevations by
early afternoon.

* Winds: west 15 to 20 mph with gusts to 30 mph through exposed
areas.

* Minimum humidities: 12 to 20 percent.




845 PM MDT Fri Aug 18 2017

... Red flag warning remains in effect until 9 PM MDT Saturday...

* affected area: fire zone 110 (deerlodge/west beaverhead).

* Impacts/timing: a dry cold front will create dry and breezy
conditions beginning this afternoon and lasting well into
Friday night as the cold front passes. The front will stall
across the area Saturday, continuing the windy conditions.

* Winds: west winds 15 to 20 mph with gusts to 30 mph through
exposed areas. Peak winds are expected between 6 to 9 PM.

* Minimum humidities: 8 to 18 percent.





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