Could California's radar warn of a rear attack?

Would California's radar help the fleet detect an attack from behind?

It might give some warning, but December 1941 radar and operator experience were unlikely to provide enough notice to neutralize the attack.

California's radar provides a chance to detect approaching aircraft, but it was not equivalent to the mature radar-directed fighter control of later years. The set itself was limited, and the operators had not yet accumulated the wartime experience that made later warning networks effective. Any alert might give crews time to man defenses or begin maneuvering, but it would not erase the attacker's positional advantage. The likely result was useful but limited warning, with too little notice to neutralize a surprise approach from behind.