The Rim Fire burning in the Stanislaus National Forest estimate has been updated to include 800 acres as of this morning, August 19, 2013 by the Stanislaus National Forest administrative incident control unit.
The fire is burning in extremely rugged terrain, which makes access by hand crews and fire suppression vehicles very difficult and often not possible in some of the area involved.
The Rim Fire is in the Clavey River drainage burning up canyon on the Clavey River, approximately 1.5 miles east of the Tuolumne River confluence. No structures are in the area of this National Forest, however, the growth potential of this fire is listed a "extreme" by InciWeb, an Incident Information System used by the national forest system.
The spread of the fire includes 'roll-out' of fuel material from the Jawbone Ridge section of the fire.The current Helispot is set up at the top of Jawbone Ridge at an elevation of 3,300 ft. Along with the four helicopter units assigned to the incident, there are: Fixed wing aircraft 5 type1 crews, 1 type2 crew, 2 engines, and 1 dozer.
The fixed wing aircraft are available, although are possibly on call for two other fires burning in the area nearby. The Bridges Fire is now 100% contained and has only 65 personnel left on scene for mop up operations. The Bridges Fire was burning near the town of Columbia, California in an area known as "Natural Bridges" along Parrotts Ferry Rd in Calaveras County, immediately adjacent to Tuolumne County. The Cottonwood Fire along Cottonwood Road in Tuolumne County is also 100% contained as of the time of this report.
In conjunction with the Rim Fire, the 'Rim of the World' along Highway 120 overlook has been closed due to public safety concerns.
Due to the smoke from the Bridges Fire and Rim Fire, visibility in sections of Tuolumne and Calaveras Counties is very limited.
The National Weather Service has issued a Red Flag Warning for much of Northern/Central California in relation to High Fire Hazard conditions along with thunderstorm and lightning activity being possible from today August 19 at 2:00 p.m. through Wednesday at 11:00 p.m. A map of the area is here.
UPDATE: 8/19/13 1635 hrs PST
The Rim Fire has now jumped across the Tuolumne River as reported at MML, and Hwy 120 has been closed as reported at InciWeb from 4 miles east of Buck Meadows to 4 miles west of the ranger station. For locals that means Hwy 120 is closed from Ferretti Road to Cherry Lake Road.
An evacuation center has been set up at Tioga High School in Groveland, Ca.
Tuolumne County Sheriff's Department is calling for advisory evacuations at: Rainbow Pool, Yosemite Inn, San Jose Family Camp, and the Spinning Wheel Forest Service Facility.
Mariposa Sheriff's department is issuing voluntary evacuation orders for the Buck Meadows area.
Fixed wing fire fighting activity has picked up significantly at the Columbia Air Attack Base in Columbia, Ca.
Update: 8/19/13 2030 hrs PST
MML reports the Rim Fire has now grown to 2,500 acres in size and burned some structures.