LOS ANGELES (AP) — A cold air mass over California prompted widespread freeze warnings and watches Friday, raising concerns for crops in the agricultural San Joaquin Valley and for homeless people in urban centers, even as skiers and snowboarders took advantage of snowy slopes. Overnight temperatures did not dip quite as low as forecast, said National Weather Service meteorologist David Spector, though much of the southern San Joaquin Valley was just below freezing during Friday's early hours. At the Oakland's Covenant House California, Bay Area Development Officer Colleen Miller said the service agency for at-risk youth living on the streets just received 50 sleeping bag coats and demand for them would likely be high. In the San Bernardino Mountains east of Los Angeles, 3 inches of snow fell overnight at the Bear Mountain resort and the slopes were filled with skiers and ski school students. For those relying on space heaters, he said people should replace hand-me-down devices that have been in families for generations.