Park Spokesperson, Scott Gediman, says a boulder “the size of a house” fell into the road approximately 1000 feet above the 120/140 junction. At the this point situation is still being assessed to determine when the road might open again, so there is no information on the estimated reopening.
Yosemite National Park remains open and Yosemite Valley is accessible via Highway 140 (El Portal Road) coming from Merced/ Mariposa and via Highway 41(Wawona Road) coming from Fresno/
With winter conditions present, chain restrictions are in place on select park roads. For 24-hour road and weather information, please call (209)372-0200 and dial 1 then 1 again. For ongoing park information, please join us on Facebook or visit the National Park Service Facebook page.
You can read the official NPS press release here.