Moisture from both Tropical Storm Ivo and Hurricane Lorena reached the Southwest in 2019. Miriam became a hurricane at 18:00 UTC on August 29, while around 1,035 mi (1,665 km) east-southeast of Hilo, Hawaii; the system entered the Central Pacific about six hours later. The storm was located over warm sea surface temperatures, fueling a 30-hour period of rapid intensification. A tropical depression developed at 18:00 UTC on June 30, while approximately 575 mi (925 km) south of Manzanillo, Mexico. Help Olivia prompted flooding on Maui and downed trees on Maui and Oahu a few weeks after Lane. Despite its close proximity to the larger disturbance which later became Hurricane John, the system rapidly organized into a tropical depression by 18:00 UTC, 230 mi (370 km) south-southeast of Puerto Ángel, Mexico. A combination of land interaction and increasing southeasterly wind shear caused weakening to commence. Hawaii. The depression strengthened into Tropical Storm Fabio around 06:00 UTC on July 1. A tropical depression spawned at 06:00 UTC on September 25, around 405 mi (650 km) south-southwest of Manzanillo, Mexico. In September 1939, a tropical storm with winds of 50 mph hit Long Beach. Heavy rainfall caused a sewage pipe to overflow, sending raw sewage into the Honolulu Harbor. Depending on the weather pattern across North America, moisture from the storm can get pulled north into the southwestern United States. [87], A disturbance spawned over the southwestern Caribbean Sea on August 26 and tracked westward, crossing over Central America and entering the Pacific Ocean a couple of days later. Outflow from Hurricane Willa, which was located to the northwest, produced northerly wind shear, which caused Vicente to weaken to a tropical depression by 06:00 UTC on October 23. In late September, Hurricanes Rosa and Sergio formed, both of which eventually brought thunderstorms and flash flooding to the Baja California Peninsula and the Southwestern United States. 9 Ways to Tell the Difference. This caused the depression to decay into a trough of low-pressure by 00:00 UTC on July 28, located about 1,210 mi (1,945 km) southeast of Hilo, Hawaii. [83] The highest rainfall in the United States, 15.81 in (401.6 mm), occurred in Johnston County, Oklahoma. It maintained this intensity for twelve hours before succumbing to decreasing sea temperatures as it traveled northwestward. [3] The reason for their outlook was the possible development of an El Niño, which reduces vertical wind shear across the basin and increases sea surface temperatures. Paul intensified slightly, peaking at 18:00 UTC with winds of 45 mph (75 km/h) and a pressure of 1,002 mbar (29.59 inHg). [137] The overflow of the Coatzacoalcos river flooded several hundred houses. A low-level ridge located north of the remnants caused them to return to a westward motion for a couple of days, before a high-pressure system located over the Central Pacific caused them to quickly turn southwestward. [151][152] Multiple cities in the states of Sinaloa and Nayarit were left without any potable water,[153][152] and in some cases, this remained the case for several months after the storm. Southerly shear imparted by an upper-level low caused gradual weakening over the next few days. Tropical Depression Nineteen-E moved mainly northward and reached its peak intensity by 18:00 UTC with winds of 35 mph (55 km/h) and a pressure of 1,002 mbar (29.59 inHg). Around the same time, a mid-level trough, which was moving southward, sent moisture into the region. Convection increased and gradually organized over the next few days. The depression strengthened into Tropical Storm Miriam six hours later. Hurricane Iniki in 1992 might be the most serious example of the impacts Eastern Pacific tropical systems can generate in Hawaii. [25] Additionally, one named storm formed in the Central Pacific in September – Walaka. [115] Rainfall from the storm peaked at 5.05 in (128 mm) in Punta de Aqua II. Atlantic - Caribbean Sea - Gulf of Mexico, National Oceanic and Atmospheric Administration, NHC Director Ken Graham discusses the heart of the 2020 hurricane season. [16] Lane brought record rainfall to Hawaii's Big Island, becoming the wettest tropical cyclone for that state and the second wettest in the United States. This allowed a surface trough to develop in a north to south orientation over Baja California Sur and the Gulf of California. June 1 marks the beginning of the 2020 Central Pacific hurricane season, which runs until November 30. Sergio traveled towards the west and west-southwest throughout this period. [104], A robust tropical wave departed from the western coast of Africa on September 6 and was located south of the Gulf of Tehuantepec by September 22. During this time, lower sea surface temperatures and ocean heat content as well as mid-level dry air caused Hector to gradually weaken into a low-end Category 3 storm. The season had the fourth-highest number of named storms – 23, tied with 1982. [88] The cyclone brought gale-force winds to Maui County and Oahu, with peak winds of 55 mph (89 km/h) occurring at the Lanai Airport. Olivia made landfall as a 45 mph (75 km/h) tropical storm at 19:10 UTC on September 12, about 10 mi (20 km) northwest of Kahului, Maui. Over the next couple of days, the wave continued westward with its convection pulsing intermittently. ", "Pacific Tropical Cyclone Names 2016-2021", National Hurricane Center's Eastern Pacific Tropical Weather Outlook, NHC 2018 Pacific hurricane season archive, https://en.wikipedia.org/w/index.php?title=2018_Pacific_hurricane_season&oldid=984219797, Short description is different from Wikidata, Articles with Spanish-language sources (es), Creative Commons Attribution-ShareAlike License. The circulation opened up into a trough about 12 hours later, located around 35 mi (55 km) southwest of Huatabampito, Mexico.