1986 жылғы Тынық мұхитындағы дауыл маусымы

Hurricane season in the Pacific Ocean

The 1986 Pacific hurricane season featured several tropical cyclones that contributed to significant flooding to the Central United States. The hurricane season officially started May 15, 1986, in the eastern Pacific, and June 1, 1986 in the central Pacific, and lasted until November 30, 1986 in both regions. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean. A total of 17 named storms and 9 hurricanes developed during the season; this is slightly above the averages of 15 named storms and 8 hurricanes, respectively. In addition, 26 tropical depressions formed in the eastern Pacific during 1986, which, at the time, was the second most ever recorded; only the 1982 Pacific hurricane season saw a higher total. Several storms throughout the season affected land. Hurricane Estelle passed south of Hawaii, resulting in $2 million in damage and two deaths. Hurricanes Newton, Paine and Roslyn each struck Northwestern Mexico. While damage was minimal from these three systems near their location of landfall, Paine brought considerable flooding to the Great Plains. The overall flooding event resulted in $350 million in damage, with the worst effects being recorded in Oklahoma. Hurricane Roslyn was the strongest storm of the season, attaining peak winds of In all, 17 systems formed, which is two storms above normal. In addition, 9 hurricanes were reported during the season, one more than average. An average number (3) of major hurricanes – Category 3 or higher on the Saffir Simpson hurricane wind scale—was also reported. The season began with the formation of Hurricane Agatha on May 22 and ended with the dissipation of Tropical Depression Twenty Five on October 25, spanning 147 days. Although it was nearly two weeks shorter than the 1985 Pacific hurricane season, the season was six days longer than average. The EPHC issued 406 tropical cyclone advisories, which were issued four times a day at 0000, 0600, 1200, and 1800 UTC. In 1986, hurricane hunters flew into three storms; Newton, Roslyn, and Estelle. In addition, the Pacific Decadal Oscillation (PDO) was in a warm phase during this time period. Three tropical cyclones made landfall in 1986. The first, Hurricane Newton made landfall near Cabo San Lucas, but its remnants were described as one of the worst floods in Oklahoma history. In addition, Hurricane Estelle came close enough to Hawaii to require a hurricane watch. By 0000 UTC May 22, the circulation began to tighten and become more organized, and thus the EPHC upgraded the disturbance into Tropical Depression One E that morning. Approximately 48 hours after becoming a tropical depression, the system was upgraded into Tropical Storm Agatha, the first storm of the season. After moving southeast, the cyclone made an abrupt change in direction, turning towards the north. Agatha strengthened into a hurricane on May 25 near the coast of Mexico, reaching its peak intensity of Turning southeast, the system quickly weakened into a tropical depression, but regained tropical storm strength on May 28, only to dissipate that day.

A tropical disturbance formed on May 30 in the eastern Gulf of Tehuantepec. The disturbance was moving very slowly when it was upgraded to Tropical Depression Two E on May 31. The depression began to weaken six hours later and the final advisory by the EPHC was released on June 1.

A tropical disturbance originated from the Intertropical Convergence Zone (ITCZ) on June 16. The disturbance moved west northwest at below a weak upper level high, becoming the third tropical depression of the 1986 season on June 17. The depression intensified into Tropical Storm Blas the next day. It kept that strength for only six hours, weakening into a depression again as it moved into cooler waters. After Blas's convection dissipated, the EPHC ceased advisories on June 19 More than 200 people evacuated from their homes. Huge waves crashed on the shores of the Big Island on the afternoon of July 22. The high waves washed away five beachfront homes and severely damaged dozens of others on the beach resort of Vacation Land. The total damage was around $2 million. However, only two deaths reported from the storm, both of whom drowned offshore Oahu.

A tropical wave crossed Southwestern Mexico and Belize in mid August. A tropical disturbance developed from this wave south of Acapulco on August 15, the same day that the system moved offshore. Moving west northwest south of an upper level high, the system was classified as a tropical depression the next day about south of Manzanillo. Several hours later, the depression reached tropical storm intensity. Turning towards the northwest due to a trough,

A tropical disturbance developed south of Socorro Island at 1800 UTC August 18. Twenty four hours later the disturbance was upgraded into a tropical depression on August 19. The depression intensified into Tropical Storm Isis the next day. After peaking as a moderate tropical storm at 1200 UTC August 23, Isis weakened into a depression over waters early on August 24. While located some west of the Mexican coast, the tropical cyclone dissipated later that day. prompting meteorologists to issue a high surf advisory. Hurricane Javier brought the highest waves of the summer to southern California.

In late August, a tropical disturbance formed east southeast of Hurricane Javier and nearly south of the Baja California Peninsula. Moving slowly west, the disturbance began to develop a well defined circulation, and was respectively upgraded into a tropical depression on August 28. Passing south of Clarion Island, the depression strengthened into Tropical Storm Kay. The cyclone's forward speed increased; subsequently, Kay reached its peak intensity. After maintaining its intensity for 18 hours, Kay rapidly weakened over cold water, and was downgraded into a depression at 0000 UTC September 2. Kay dissipated the next day several hundred miles west of the Baja California Peninsula. After the hurricane's second landfall, damage was also minor, though 40 roofs were ripped off of homes; trees and utility poles were also downed due to high winds. However, no injuries or fatalities were reported in association with Newton. Newton's remnants later combined with a cold front to produce heavy rainfall that downed power lines in Kansas City, Missouri, leaving 20,000 customers without power. Up to of snow fell in parts of Colorado. Flagstaff, Arizona recorded their earliest day of of snow on record. Winds from the storm peaked at in the state of Colorado and in the state of Kansas.

Hurricane Orlene originated from a stationary tropical disturbance that was upgraded into a tropical depression on September 21. Paine moved ashore near San José, Sonora with winds of The storm weakened as it moved over land going through Mexico and then entering the United States. Paine dissipated on October 4 over Lake Michigan. The Barnsdall, Oklahoma weather station recorded 10.42 inches (26.5 cm) on September 29, which set a record for the highest daily precipitation for any station statewide. The flooding affected 52 counties in Oklahoma, which resulted in a total of $350 million in damage. In all, Paine was described as one of the worst floods in Oklahoma history. Flooding from Paine resulted in about 1,200 people homeless in East Saint Louis, Illinois and resulted in record discharge rates along many streams and creeks. Subsequently, many reservoirs were nearly filled to its capacity. For example, the Mississippi River in St. Louis reached the fifth highest flood stage on record.

A tropical disturbance moved westward offshore Nicaragua and was declared Tropical Depression Twenty Four on October 15 During the early afternoon of the next day, ship reports indicated the formation of a tropical depression close to land. The cyclone moved at a quick pace towards the west northwest south of a warm core ridge. Early on the morning on October 16, Roslyn became a tropical storm. By the morning of the October 17, Roslyn had developed into a hurricane south of Acapulco. and only one yacht sunk.

In addition to the 17 named storms, there were eight tropical depressions during the season that failed to reach tropical storm strength. The second, Tropical Depression Seven, began as a large area of thunderstorms near Hurricane Estelle on July 17. Moving at a steady pace, the cyclone failed to intensify and attained peak intensity of Cool sea surface temperatures and its proximity to Hurricane Estelle eventually caused the depression to dissipate late on July 18. Another tropical disturbance formed on July 24. A circulation developed two days later, and thus it was classified as Tropical Depression Ten. The cyclone remained a tropical depression for about three days before moving into the CPHC's area of responsibility on 1000 UTC July 27. A slow weakening trend began as the depression continued to move west at speeds of By 1800 UTC on July 29, it had become poorly organized around west southwest of the Hawaiian Islands, and the final advisory was issued.