Fire Update September 12th, 2017

September 12, 2017 Posted by: Yosemite Fire Information
There are multiple fires burning in Yosemite National Park's wilderness. Showers and thunderstorms are possible each afternoon and evening through Thursday with increased relative humidities and cooler temperatures. Gusty and erratic winds are possible with any thunderstorm that develops.

Yesterday smoke was good to moderate throughout the Yosemite area for most of the day. Dispersion remains poor today and tomorrow, however most areas are likely to stay in the good to moderate range unless there is new fire activity. The fire area received substantial wetting rain yesterday and activity should be minimal under continued high humidity and light winds. Fire Managers are working with the local Air Quality Districts and will be monitoring smoke impacts to the park and local communities. Community members who are sensitive to smoke may want to close their windows and doors, limit outdoor activity, and monitor the air quality forecast linked below for changes to the forecasted patterns. 

https://www.wildlandfiresmoke.net/outlooks/2017/CentralSierraFires#Area2
https://www.nps.gov/yose/learn/nature/aqmonitoring.htm
https://app.airsis.com/USFS/UnitMap?custId=11&unitId=1011&isHistoric=False

Railroad Fire is 12,407 acres and 80% contained. Thunderstorms brought about a quarter of an inch of rain last night, today crews will continue mop up operations to extinguish hot spots near the perimeter. Inciweb: https://inciweb.nwcg.gov/incident/5553/

South Fork

Discovered: 8/13/17                           
Location: .75 miles east of the community of Wawona
Size: 6,840 acres        Cause: Unknown        Containment: 47%      Fuels: Mixed conifer and red fir

Fire remains quiet near the community of Wawona on the west and south flank of the fire. Sections of the north flank and the entire east flank are continuing to burn in the wilderness.

Inciweb: https://inciweb.nwcg.gov/incident/5502/

Empire

Discovered: 8/1/17     Location1 mile east of Yosemite Ski and Snowboard Area and 3/4 mile south of Glacier Point Road
Size: 6,000 acres        Cause: Lightning         Containment: 55%      Fuels: Red fir 
 
Fire activity was minimal yesterday due to increased cloud cover and precipitation. Fire crews implemented a strategic burning operation along Glacier Point road from Mono Meadow Trailhead towards Horizon Ski trail. Glacier Point Road remains closed until further notice due to fire operations.

Inciweb: https://inciweb.nwcg.gov/incident/5475/           
 
Starr King

Discovered: 8/2/17     
Location: N 37° 42.965' x W 119° 29.588' at approximately 7800 feet elevation
Size: 60 acres             Cause: Lightning         Spread Potential: Low/ Moderate
Fuels: Red fir/ Lodgepole        Strategy: Monitor                   
 
Fire personnel have secured the northern edge of the fire which will prevent fire from entering steep slopes down into Little Yosemite Valley. Fire continues to back towards the Cascade Cliff area. Smoke will be visible from the high country.

Rattlesnake

Discovered: 9/7/17
Location: Hwy 120/Big Oak Flat Rd. at Foresta Rd.
Size: 15 ac.                 Cause: RV/ Vehicle fire   Containment: 100%       Fuels: Grass mixed shrubs

The fire started due to an RV catching fire and spreading north into the old Big Meadow burn scar which helped limit its spread.  Yosemite fire crews will be checking this fire.

Yosemite Creek

Discovered: 8/3/17     
Location: N 37° 50.414' x W 119° 38.088' at approximately 7,970 feet elevation
Size: 3.4 acres            Cause: Lightning                     Spread Potential: Low
Fuels: Red fir              Strategy: Monitor         
          
Fire is creeping and smoldering and will continue to be checked by fire crews.
 
Porcupine

Discovered: 8/2/17     Location: N 37° 49.336' x W 119° 34.720' at approximately 8154 feet elevation off Tioga road.  
Size: 4.8 acres                        Cause: Lightning         Spread Potential: Low
Fuels: Lodgepole/Red fir         Strategy: Monitor                   

Fires edge is 30 feet from the Tioga road and is creeping and smoldering and to be checked by fire crews. 
 

Last updated: September 12, 2017

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Yosemite National Park, CA 95389

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