 On September 5 , a tropical cyclone formed off the coast of Costa Rica . It also headed northwest and dissipated over the southern part of Baja California on September 15 . The lowest reported pressure was 1 @,@ <unk> mbar ( 29 @.@ 6 inHg ) . From September 19 to 21 , remnants of this tropical cyclone caused rain measuring up to 3 inches ( 76 mm ) in Southern California . 
