The S-503 Fire on the Confederated Tribe of the Warm Springs Reservation remains listed at 6,201 acres in size and at 10% containment.  An update from Northwest Incident Management Team 8 this morning indicated firefighters will continue to strengthen lines on the fire’s northern flank one mile south of Highway 216 and the eastern side four miles west of Highway 3.  On the southern and western flanks of the fire approximately two miles east of Highway 26, resources are constructing direct fire line where feasible while securing and holding existing containment line.  Predicted afternoon winds and potential thunderstorms may test the eastern side of the fire.  Initial attack activity is expected to increase as lightning activity moves through the area.  Northwest Incident Management Team 8 will assist the Confederated Tribe of the Warm Springs Reservation with any new fire starts.