• Steam rises off of the colorful Mammoth Hot Springs Terraces. Photo courtesy Jacob W. Frank


    National Park ID,MT,WY

Arnica Fire Update - September 27 1:30 p.m.

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Date: September 27, 2009
Contact: Brian Suderman, (307) 344-2012
Contact: Stacy Vallie, (307) 344-2012

National Park Service

U.S. Department of the Interior


Yellowstone National Park

P.O. Box 168

Yellowstone National Park, WY 82190



September 27, 2009 09-097                  

Brian Suderman or Stacy Vallie (307) 344-2012







Probable Start Date: September 13, 2009

Reported: September 23, 2009           Cause: Lightning  Estimated Size: 8300 acres                             

IMPACTS TO VISITORS AND AREA RESIDENTS: For safety reasons the road between the Junction at Fishing Bridge and West Thumb has been temporarily closed due to the fire’s proximity to the road. 

Smoky conditions will affect air quality today and are likely to continue tomorrow. Individuals with weakened immune systemsand those with heart and lung conditions could be most affected.

Smoke and flames can be seen from the Grand Loop Road.  Drivers are advised to use caution and drive slowly as smoke could reduce visibility.


The Elephant Back and Natural Bridge Trails have been closed due to fire activity in these areas. Check at park visitor centers or backcountry offices for the current status of other hiking trails and backcountry campsites in the area.


No facilities have closed at this time due to fire activity with the exception of the launching of private water craft from the Bridge Bay Marina. Water craft can still be launched from Grant Village.


LOCATION: Two miles northwest of Bridge Bay with small spot fires within one mile of Bridge Bay.


OVERVIEW: The lightning-caused fire is burning in a flat area of mature lodgepole pine forest and isestimated at 8300 acres.

RECENT ACTIVITY AND EXPECTATIONS: The fire is expected to burn actively under southwesterly winds, especially during the peak afternoon burning period when temperatures are expected to reach into the 60s.

CURRENT WEATHER CONDITIONS: 59°F; winds from the west northwest at 14 mph; 15% relative humidity.

TODAY’S FORECAST: Highs in the low 60s, southwest winds 10-12 mph by noon; 15-20 mph this afternoon with gusts to 25 mph; 14-16% relative humidity.

FIRE AND ROAD UPDATES:  Visitors can use the following sources to access up-to-date information: http://www.inciweb.org/incident/1901/; http://www.nps.gov/yell/parknews/newsreleases.htm, or by calling the 24-hour road information line at 307-344-2117, or the fire information line at 307-344-2580.

MANAGEMENT STRATEGIES: Currently, 120 personnel have been assigned to the fire.

Helicopters will be used to drop water in order to minimize further impacts to road and power line corridors. Firefighters have implemented structure protection in the Lake area utilizing irrigation systems and fire engines.

Yellowstone National Park is a fire-adapted ecosystem. Fire plays an important role in maintaining the health of the area’s wildlife and vegetation. Most fires occurring in the Greater Yellowstone Area are caused by lightning. Firefighters continue to monitor the Arnica Fire by air, from the ground, and from the Mt. Washburn Fire Lookout. The fire is being managed in order to protect people and property, allow natural processes to occur, and effectively use available firefighting resources.  

- www.nps.gov/yell -


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