A tropical wave became increasingly organized on October 2 to the south-southeast of Acapulco and developed into Tropical Depression Fifteen-E the next day. The depression strengthened into Tropical Storm Olaf six hours after forming as it moved to the northwest in a low shear environment. Olaf reached its peak strength as a minimal hurricane with 75 mph (120 km/h) winds on October 5 and developed a partial eyewall. The storm soon became disorganized and was only a hurricane for a few hours, before turning towards the Mexican coast. Olaf made landfall near Manzanillo, Colima, on October 7 and soon dissipated overland.
The storm caused severe flooding in the states of Jalisco and Guanajuato which damaged crops, roads and over 12,000 houses. However, there were no deaths as a result of Hurricane Olaf.
The NHC's archive on Hurricane Olaf
The HPC's rainfall page for Nora and Olaf
 Hurricane Patricia
Category 1 hurricane (SSHS)
Duration October 20 – October 26
Intensity 80 mph (130 km/h) (1-min) 984 mbar (hPa; 29.06 inHg)
On October 20 the convection associated with a tropical wave became more organized and Tropical Depression Sixteen-E formed to the south of Acapulco. It soon became Tropical Storm Patricia and reached hurricane strength on October 21, as it moved further west. 12 hours later, its winds had increased to 80 mph (130 km/h) and the NHC forecast further strengthening. However on October 22, increasing westerly shear caused Patricia to weaken to below hurricane strength. The storm weakened further to a depression on October 25 and it dissipated the next day, ending the season. Hurricane Patricia had no effects on land.