Alma became the earliest named storm and hurricane in the satellite era in the eastern Pacific Ocean east of the 140th meridian west at the time; a record subsequently eclipsed by Adrian in 2017.
[5] With the exception of Marie and Polo, these systems developed between 5° and 15°N, east of the longitude of Baja California Peninsula in the climatologically favored area for tropical cyclogenesis in the basin.
Strengthening continued, and the storm reached its peak strength with winds of 90 mph (140 km/h) and a minimum central pressure of 977 mb (28.9 inHg).
The remnants of Boris also brought sporadic rainfall over the western United States, with precipitation being reported in Arizona, California, Colorado, Nevada and Wyoming.
The remnants of Boris were responsible for causing the wettest June in San Diego since records began in 1850; however, not even 1 in (25 mm) of rain fell at that location.
The system became well-enough organized to be upgraded to Tropical Depression Three-E on June 8, while 920 mi (1,480 km) south of the southern tip of Baja California.
Tropical Depression Four-E formed on June 19, when it was 230 mi (370 km) south of Acapulco after evidence of low-level circulation for the past 24 hours.
[21][23] An area of disturbed weather south of Acapulco organized into Tropical Depression Six-E on June 29 and the system began to move northwest.
Although the low-level circulation was near the edge of the deep convection, the National Hurricane Center resumed advisories on Tropical Depression Six-E by July 1.
The depression moved northwest, and because of increased organization of deep convection, was designated Tropical Storm Fausto on July 7, 265 mi (426 km) south of Manzanillo, Mexico.
A weakly defined eye formed on July 8, and the storm was upgraded to Hurricane Fausto, 310 mi (500 km) south of Cabo San Lucas.
Fausto passed 40 mi (64 km) north of Socorro Island causing a northwest wind of 40 mph (64 km/h), and 4.3 in (110 mm) of rain at that location.
The hurricane fluctuated in intensity on July 10,[29][30] before weakening into a tropical storm later that day, 403 mi (649 km) west of Cabo San Lucas.
The weakening Fausto moved over continuing cooler waters, and was downgraded to a tropical depression on July 11, 690 mi (1,110 km) west of Cabo San Lucas.
Increasing outflow aloft began to form, and the hurricane reached its peak strength of 105 mph (169 km/h) with a well-defined eye at its center of circulation.
[31] A tropical wave that moved off the northwest coast of Africa on July 4 passed through the Atlantic Ocean and Caribbean Sea without significant development.
On July 23, Hernan reached its peak strength of 155 mph (249 km/h) and minimum pressure of 928 mb (27.4 inHg) as the center of circulation was 207 mi (333 km) south-southwest of Clarion Island.
Hernan turned more to the west as its low level center became separated from its thunderstorm activity and was steering by a surface high-pressure system to its north.
[5] Atlantic basin Hurricane Diana made landfall on August 7 at Category 2 strength in Tamiahua, Tamaulipas, along the Gulf of Mexico coast.
The system entered the northeastern Pacific Ocean, and became well-enough organized to be upgraded to Tropical Depression Thirteen-E on August 17 while centered 404 mi (650 km) south of Acapulco, Mexico.
The thunderstorm activity organized sufficiently for the system to be upgraded to Tropical Depression Fifteen-E on August 23 while 298 mi (480 km) southeast of Acapulco, Mexico.
The storm began to turn more westward due to a strengthening high pressure system to its north and was upgraded to a hurricane on August 27 while 286 mi (460 km) southwest of Cabo San Lucas.
Once convective activity increased, the system was upgraded to Tropical Depression Sixteen-E on September 7 while centered 659 mi (1,061 km) southwest of Clarion Island.
Located in close proximity to Tropical Storm Norbert, the depression would soon enter a region of colder sea surface temperatures, and the National Hurricane Center noted that only very little intensification was possible.
[58] A tropical wave move off the coast of Africa on September 5, and crossed the Atlantic waters, the Caribbean Sea and eventually into the Pacific Ocean as a weak system.
[68] The depression continued to develop and was upgraded to Tropical Storm Simon on October 10 while 604 mi (972 km) south-southwest of Cabo San Lucas.
[68] The tropical wave that would become future Hurricane Trudy became identifiable on satellite imagery as early as September 30, emerging near the African coast off Cape Verde.
In less than 36 hours, at 1200 UTC on October 20, Trudy became a powerful hurricane with Category 4 equivalent maximum winds of 155 mph (250 km/h) and a minimum pressure of 925 mbar (27.3 inHg) according to satellite estimates.
[1] An upper-level trough forced Trudy to move northwards, increasing the risk of hurricane conditions to Baja California Sur residents.
Before it could strike land, a high-pressure area blocked Vance's path and forced the storm to transcribe a small clockwise loop over a two-day period.