Coastal Southern California clouds could obscure eclipse
Aug. 18, 2017
LOS ANGELES (AP) — Southern California coastal residents may want to head inland to ensure a chance of seeing Monday's eclipse.
The National Weather Service says a persistent marine layer will continue to bring night-through-morning low clouds and fog along the coast and extending into valleys.
The cause is the trough of low pressure that has been keeping the area's air mass cooler than normal.
Forecasters say the trough will wobble around the Southern California Bight, weakening the marine layer on Saturday, then strengthening the onshore flow of moist ocean air by Monday.
The U.S. Naval Observatory says that in Los Angeles the eclipse will block just over 60 percent of the sun while about 75 percent will be obscured in the San Francisco Bay region.
Eclipse percentage http://aa.usno.navy.mil/data/docs/Eclipse2017.php#forma