UPDATE (5:47 a.m.):
Cal Trans District 5 is reporting the highway is free to drive upon, but caution should still be advised in case of returning dust.
UPDATE (8:38 p.m.):
Cal Trans District 5 posted on Twitter that State Route 41 will be closed from Highway 46 in San Luis Obispo County to State Route 33 in Kings County.
According to the agency, the closure is due to a dust storm with low visibility.
Drivers can detour on Interstate 5 or State Route 33.
There is no estimated time for a reopening.
This is a developing story.