 = 1939 Pacific hurricane season = 
 
 The 1939 Pacific hurricane season ran through the summer and fall of 1939 . Before the satellite age started in the 1960s , data on east Pacific hurricanes are extremely unreliable . Most east Pacific storms are of no threat to land . However , 1939 saw a large number of storms threaten California . 
 
 = = Storms = = 
 
 
 = = = Hurricane One = = = 
 
 On June 12 , a hurricane was detected . The lowest pressure reported by a ship was 985 mbar ( 29 @.@ 1 inHg ) . The hurricane was last seen June 13 . 
 
 = = = Possible Tropical Cyclone Two = = = 
 
 A possible tropical cyclone was located off the coast of Mexico on June 27 . A ship reported a gale and a pressure of 1 @,@ 006 mbar ( 29 @.@ 7 inHg ) . The system was last seen on June 28 . 
 
 = = = Tropical Cyclone Three = = = 
 
 On July 19 , a tropical cyclone was detected . A ship reported a pressure of 1 @,@ 000 @.@ 7 millibars ( 29 @.@ 55 inHg ) . 
 
 = = = Tropical Cyclone Four = = = 
 
 On July 29 , a tropical cyclone was located midway between Manzanillo and Acapulco . It moved up the coast , and a ship reported a pressure of 1 @,@ 000 mbar ( 30 inHg ) on July 29 as the cyclone made landfall in the vicinity of Manzanillo . 
 
 = = = Tropical Cyclone Five = = = 
 
 A small tropical cyclone was detected on August 31 . A ship reported <unk> and a pressure of 1 @,@ <unk> @.@ 3 millibars ( 29 @.@ 63 inHg ) . 
 
 = = = Hurricane Six = = = 
 
 From September 4 to 7 , the remnants of a hurricane brought heavy rain to Southern California . The storm delivered over a year 's worth of rainfall to Blythe , while Imperial received more than two year 's worth . The flooding caused major damage in Mecca , California , and 3 feet ( 0 @.@ 91 m ) of water swamped <unk> . 
 
 = = = Hurricane Seven = = = 
 
 A tropical cyclone was first detected south of Acapulco on September 5 . It intensified into a hurricane and moved northwestward . A ship sailing through the eye reported a pressure reading of <unk> mbar ( 28 @.@ 0 inHg ) . The tropical cyclone made landfall somewhere along the Baja California Peninsula . It dissipated inland over the northern part of the peninsula on September 12 . Remnants of this tropical storm , in association with a trough , caused rain of up to 4 inches ( 100 mm ) in southern California on September 11 and 12 . 
 
 = = = Tropical Cyclone Eight = = = 
 
 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 . 
 
 = = = Hurricane Nine = = = 
 
 On September 14 , a tropical cyclone formed off the coast of Central America . This tropical storm tracked northwestward and intensified into a hurricane . The sea @-@ level pressure dropped to <unk> mbar ( 28 @.@ 8 inHg ) or lower . The hurricane recurved gradually to the northeast and weakened over cool seas . On September 25 , this tropical storm made landfall near Long Beach , California , and dissipated inland . 
 The tropical storm caught Southern <unk> unprepared . It brought heavy rain and flooding to the area , which killed 45 people . At sea , 48 were killed . The storm caused heavy property damage amounting to $ 2 million ( 1939 USD ) in total , mostly to crops and coastal infrastructure . 
 
 = = = Hurricane Ten = = = 
 
 On October 23 , a tropical cyclone formed south of Cabo Corrientes . It intensified and headed roughly due north . A steamer , the <unk> , caught in the eye of this extremely intense hurricane , recording a corrected central pressure of 930 mbar ( hPa ; 27 @.@ 46 inHg ) . Even with modern tropical cyclone observation techniques available , this reading still qualifies this cyclone as one of the most intense on record . The steep pressure gradient between the <unk> and the external hurricane conditions off of Manzanillo , Colima caused several <unk> to burst . Other shipping was disrupted off the Mexican coast by the intense tropical cyclone . 
 The hurricane made landfall near Cabo Corrientes on October 25 and dissipated shortly thereafter . <unk> , the storm caused an extensive <unk> of damage . <unk> were destroyed in the towns of Santiago <unk> and <unk> in the Mexican state of <unk> , <unk> hundreds of people . In Puerto Vallarta , a strong storm surge flooded a section of the town , destroying several homes . Tobacco , corn , and rice crops in the region suffered considerable damage . The strong winds downed power lines , resulting in the delayed <unk> of damage reports . Although no exact casualty total was documented , reports indicated that the tropical cyclone caused a " few casualties " . After the storm , US $ 6 @,@ 000 was donated to help aid the displaced in the states of <unk> and <unk> , while doctors and nurses were sent to those areas . 
 
 