Delta moved erratically for a few days before moving towards the Canary Islands. It became extratropical just before it passed to the north of the archipelago.
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Moderate Tropical Storm Gladys developed on March 27. It struck Madagascar and later Mozambique. Gladys then moved erratically in the Mozambique Channel before dissipating on April 10.
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Jeff recurved east of mainland Asia during late November. Kit moved erratically westward towards the Philippines during mid-December. Lee moved across the central Philippines, dissipating across the South China Sea on December 28.
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The low moved erratically within low-level flow and dissipated early on June 19. Under the anticipation of waves, a "yellow" alert was issued for Colima, Guerrero, Oaxaca, and parts of Jalisco and Michoacan. Along Manzanillo, strong waves resulted in minor flooding that damaged one road.
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Caught in the weak low-level flow, the circulation moved erratically, first to the west, then drifting before turning to the southeast. It continued to produce some convection during this time, which spread rainfall over Mauritius and Réunion. A cold front swept Charly to the southeast, absorbing it on January 31.
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While northeast of the Bahamas, Betsy moved erratically and executed another cyclonic loop. The storm steadily weakened, and was briefly downgraded to a Category 2 hurricane early on September 6\. However, it promptly re-strengthened into a Category 3 hurricane. Betsy then tracked southwestward and then westward through the Bahamas.
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The broadsheet claims that witnesses observed hundreds of spheres, cylinders and other odd-shaped objects that moved erratically overhead. The broadsheet describes objects of various shapes including crosses, globes, two lunar crescents, a black spear and tubular objects from which several smaller, round objects emerged and darted around the sky at dawn.
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Orchid acted to limit its development by robbing inflow from this disturbance. On the 23rd it became a tropical depression before executing an anticyclonic loop. Upper level conditions became hostile soon afterwards, and the depression weakened. Into November 27 the system moved erratically and went through cycles of convective development and shearing.
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Donna caused at least 227 fatalities and $900 million (1960 USD) in damage. Hurricane Ethel reached Category 3 intensity, but rapidly weakened before making landfall in Mississippi, resulting in only 1 fatality and $1.5 million in losses. The final storm, Florence, developed on September 17\. It remained weakened and moved erratically over Cuba and Florida.
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Adrian confirmed that these objects were similar to those he saw four years ago. So he rushed back to his house and prompted his older brothers, who then told their father Tony. Tony rushed outside with his video camera. He was joined by his neighbors who watched while the objects moved erratically, jerking, floating and jumping in various directions.
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Betty testified that it was at least one and a half times the length of the granite cliff profile, which was long, and that it seemed to be rotating. The couple watched as the silent, illuminated craft moved erratically and bounced back and forth in the night sky.Friedman, Stanton and Kathleen Marden. Captured! The Betty and Barney Hill UFO Experience, 2007, pp.
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Later that day Danielle deteriorated to a Category 1 hurricane, hours before being downgraded to a tropical storm. On August 19, Danielle became nearly stationary and moved erratically while southwest of the Azores. Eventually, the storm curved west-southwestward and weakened to a tropical depression on August 20\. About 24 hours later, Danielle degenerated into a remnant low pressure area.
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Flora is thus listed among the deadliest Atlantic hurricanes on record. In October, Hurricane Ginny moved erratically offshore the Southeastern United States, though eventually, the extratropical remnants struck Nova Scotia. Ginny caused at least three deaths and $400,000 in damage in the United States alone. The final cyclone, Tropical Storm Helena, caused five deaths and over $500,000 in damage on Guadeloupe.
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Cyclone Sina affected Fiji, Tonga, Niue and the Southern Cook Islands and was responsible for damages totaling over . The system had initially appeared to threaten the Solomon Islands and Vanuatu as it performed a small clockwise loop and moved erratically towards the west-southwest during November 25. After this usage of the name, Sina was retired from the tropical cyclone naming lists for the region.
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The tornado formed at 7 p.m. (CST) and moved erratically eastward for 8 miles before dissipating near the small town of Michigan Valley. The tornado was too small to be detected on radar, and eyewitnesses stated that the tornado was only 150 yards wide but had a multiple vortex structure. Some reported another tornado in the area although it was not confirmed by the National Weather Service.
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Initially, the structure was akin to that of a subtropical cyclone, with light winds near the center. Juan moved erratically at first, eventually tracking more steadily to the north-northeast on October 27. After turning to the northwest late on October 27, Juan intensified into a hurricane, with maximum sustained winds of 75 mph (120 km/h), based on reports from the Hurricane Hunters.
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After once again crossing the island, the cyclone reached the Mozambique Channel and re-intensified. Elita turned to the southeast to make its final landfall on February 3 along southwestern Madagascar. Two days later, it underwent an extratropical transition; subsequently, the remnant system moved erratically before dissipating on February 13. Elita dropped heavy rainfall of more than 200 mm (8 inches), which damaged or destroyed thousands of houses in Madagascar.
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A tropical disturbance formed about 175 miles (280 km) west of the coastline of Colombia early on August 26\. The large system moved steadily west, developing into a tropical depression by 00:00 UTC on August 29\. Over the course of the next several days, the depression failed to intensify further as it moved erratically. Finally, by 12:00 UTC on September 3, the depression strengthened into Tropical Storm Joanne.
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Dan's low level circulation moved erratically to the south and passed within 140 km west of Christmas Island on December 17, where winds of 74 km/h were observed. Dan ultimately dissipated around 370 km to the south of Christmas Island on December 18. Cyclone Dan is notable in that it traveled generally towards the southeast for the duration of its existence, which is uncommon for cyclones in the area.
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About a week after Jinabo formed, another tropical disturbance formed in the basin on March 28 south of Diego Garcia. In its formative stages, it moved erratically, although generally to the southwest. On March 30, it intensified into Moderate Tropical Storm Krisy, the same day that the JTWC classified it as Tropical Cyclone 21S. Due to a ridge to the south, Krisy's track shifted to the west that day before turning southward on April 1\.
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The first tropical cyclone of the season was initially identified by the Joint Typhoon Warning Center (JTWC) on May 9 near Woleai Atoll. Tracking steadily west-northwestward, the system gradually organized. Early on May 14, the system had become sufficiently organized for the JTWC to classify it as a tropical depression. Over the following four days, the depression moved erratically, executing two loops, and fluctuated between tropical storm and tropical depression status.
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On September 4 a tropical depression formed east of Luzon from the monsoon trough. It remained embedded within the trough, and moved erratically, drifting northward to become a tropical storm late on the 4th. Gerald turned more to the northwest, reached typhoon strength on the 7th, and continued to intensify to a peak of on the 8th. It passed south of Taiwan, disrupting the circulation and weakening it as it continued to the west-northwest.
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Four minutes later, Rodneys two forward turrets, comprising six guns, opened fire, then King George Vs guns began firing. Bismarck returned fire at 08:50 with her forward guns; with her second salvo, she straddled Rodney. Thereafter, Bismarcks ability to aim her guns deteriorated as the ship, unable to steer, moved erratically in the heavy seas and deprived Schneider of a predictable course for range calculations. As the range fell, the ships' secondary batteries joined the battle.
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During November 25, the cyclone continued to intensify and developed an eye as it moved erratically towards the west-southwest and performed a small clockwise loop. Early on November 26, the FMS reported that Sina had become a category 3 severe tropical cyclone. At around this time the JTWC reported that Sina had become equivalent to a category 1 hurricane on the Saffir-Simpson hurricane wind scale (SSHWS). During that day, Sina's eye became very distinct on satellite imagery.
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On January 12, Costa intensified into a moderate tropical storm. On the next day, the JTWC upgraded it to the equivalent of a minimal hurricane, and the MFR estimated peak winds of 95 km/h (60 mph). Costa weakened briefly on January 14 while passing about 100 km (60 mi) east of Rodrigues, although it re-attained its former peak on the next day while accelerating southeastward. Costa thereafter weakened rapidly and moved erratically toward the southwest.
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Marty then stalled over the Gulf of California after encountering a high pressure system over the U.S. state of Nevada, and further weakened to a tropical depression before making a second landfall near Puerto Peñasco, Sonora, on September 24. Marty became a remnant low pressure area on September 25, and moved erratically over the northern Gulf of California for the next two days before drifting southwestward and dissipating over the northern Baja California Peninsula on September 26.
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Little or no deep thunderstorm activity surrounded the center, and the highest winds were confined to a rainband in the northern semicircle of the cyclone. The storm moved erratically northwestward throughout the day on August 26, strengthening only slightly. Danny's center reformed several times, making it difficult to determine its direction of movement. By early on August 27, the tropical storm became slightly better organized, although the most intense winds were still removed from the center.
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Severe Tropical Storm Linfa, known in the Philippines as Severe Tropical Storm Egay, was a tropical cyclone that affected the northern Philippines, Taiwan and southern China in early July 2015\. The tenth named storm of the annual typhoon season, Linfa developed on July 1 over in the Philippine Sea. It moved erratically westward toward the Philippines, eventually striking the island of Luzon on July 4\. Linfa weakened across the island, but reorganized over the South China Sea.
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The final storm of the 1989-90 South-West Indian Ocean cyclone season formed as a tropical disturbance on May 11 west-southwest of Diego Garcia. It moved erratically at first, initially to the west, followed by a turn to the south and later a small loop. Its movement during this time and for its duration was dictated by a powerful ridge to the south. During this time, the system remained weak, although it intensified into Moderate Tropical Storm Ikonjo on May 14.
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Hurricane Henri was a rare tropical cyclone that entered the Gulf of Mexico without having made landfall; it was the second of four times this occurred during the 20th century. The eighth named storm and fifth hurricane of the 1979 Atlantic hurricane season, it formed on September 14 in the northwestern Caribbean Sea. Throughout much of its duration, Henri moved erratically and initially maintained a general westward track. On September 16 it attained tropical storm status, and a day later it reached hurricane status.
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Due to weak steering currents, the depression moved erratically, initially to the south and later to the west-northwest. It failed to intensify due to a surface trough over the central and eastern Gulf of Mexico, connected to a cold front. While the depression was drifting, it produced large areas of convection over eastern Mexico, aided by high humidity from the gulf and from the Pacific Ocean. On October 6, the circulation was absorbed into the trough, although rainfall continued to occur through October 9.
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Due to its fast forward motion, the storm gained little in organization and made landfall near Port Leon, Florida, on June 9 with winds of 50 mph (85 km/h). However, the system gradually strengthened as it crossed the Florida peninsula, reentering the North Atlantic later that day. On June 10, the storm reached peak winds of 65 mph (100 km/h) prior to becoming an extratropical storm. The post-tropical cyclone then strengthened and moved erratically in open seas before entirely dissipating on June 15\.
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Following Alessia's reorganization over the Gulf of Carpentaria early on 27 November, a cyclone warning was raised for areas between Port Roper, Northern Territory to Karumba, Queensland, including Mornington Island. Once the storm moved onshore in the Northern Territory, all watches and warnings were dropped later that same day. On Centre Island, daily rainfall peaked at on 27 November, with an additional falling over the subsequent three days as Alessia moved erratically in the southwestern Gulf of Carpentaria. Sustained winds of and gusts to affected the island during the storm's passage.
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Rounding the edge of a separate trough, Fran also began a northward turn that directed it at the Ryukyu Islands of Japan. Between 12:00 and 18:00 UTC on September 9, the eye of Fran passed between Okinoerabujima and Tokunoshima. Continual back and forth shifting of a trough north of the typhoon caused Fran to slow to a crawl by September 10\. For the next day, Fran moved erratically along the western edge of the Tokara Islands, southwest of Kyushu, all the while battering the region with torrential rain and damaging winds.
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After two months of inactivity, a tropical depression formed on July 4 in the South China Sea 480 miles (770 km) west of Luzon. After briefly drifting northeast, the depression moved erratically northward on July 5, and it made landfall on mainland China east of Hong Kong on July 6. The depression quickly dissipated after moving inland. Operationally the system was classified as a tropical storm under the name Wilda, but post-analysis determined the tropical cyclone never attained winds of 39 mph (60 km/h) or greater.
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The Joint Typhoon Warning Center identified an area of disturbed weather northeast of Chuuk on September 13. The disturbance drifted to the north over the next few days, gradually increasing in organization. The JTWC issued a Tropical Cyclone Formation Alert on the disturbance on September 16, and both the JTWC and JMA declared the system a tropical depression early on September 17. The JMA upgraded it to Tropical Storm Yagi later that morning as it moved erratically through the open Pacific Ocean, and the JTWC soon followed suit.
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A tropical wave exited the coast of Africa and moved westward across the Atlantic before entering the eastern Pacific on October 8\. Despite strong easterly wind shear, the system acquired enough organization to be deemed a tropical depression at 0000 UTC on October 15\. Within a broad cyclonic gyre, the system moved erratically, first drifting south then east-northeast and eventually northwest. Early on October 16, the system briefly intensified into a tropical storm as a convective band wrapped around the circulation, but continued strong shear caused associated convection to dissipate and the system weakened to a tropical depression by 1800 UTC.
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Though satellite and radar imagery show the system was well-organized, the system slowed and moved erratically for a period of time, executing what appeared to be a small counterclockwise loop. The storm began tracking in a generally northeasterly direction, and crossed into the southern Delmarva Peninsula on June 16. The subtropical remnants reached the Atlantic on June 17, and while located east of Atlantic City, New Jersey, winds began to restrengthen, and heavy rains formed to the north of the circulation. The low was interacting with a frontal boundary, and started merging with it, as it accelerated to the northeast at .
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Isa developed from a disturbance in the monsoon trough near the Caroline Islands on April 12. It moved erratically at first, though after attaining tropical storm status it curved westward due to the subtropical ridge to its north. Isa very gradually intensified, and on April 20 the typhoon reached peak 1-min winds of 270 km/h (165 mph), as reported by the Joint Typhoon Warning Center; Japan Meteorological Agency reported maximum 10-min winds of 155 km/h (100 mph). After turning northward, it accelerated to the northeast, and merged with a larger extratropical cyclone on April 24.
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Typhoon Isa was the first of a record eleven super typhoons to occur during the 1997 Pacific typhoon season. The second tropical cyclone of the season, Isa developed from a disturbance in the monsoon trough near the Caroline Islands on April 12. It moved erratically at first, though after attaining tropical storm status it curved westward due to the subtropical ridge to its north. Isa very gradually intensified, and on April 20 the typhoon reached peak 1-min winds of 270 km/h (165 mph), as reported by the Joint Typhoon Warning Center; Japan Meteorological Agency reported maximum 10-min winds of 155 km/h (100 mph).
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On 3 February, the Fiji Meteorological Service (FMS) started to monitor Tropical Disturbance 07F, which had developed within a trough of low pressure, about to the southeast of Honiara in the Solomon Islands. The system was poorly organized and was located along an upper-level ridge of high pressure, in an area of high vertical wind shear. Over the next couple of days, the system moved erratically near northern Vanuatu and remained poorly organized, with atmospheric convection located to the south of the low-level circulation center. The system subsequently started to move south-eastwards, towards the Fijian Islands and a favorable environment for further development, on 5 February.
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On 3 February, the Fiji Meteorological Service (FMS) started to monitor Tropical Disturbance 07F, which had developed within a trough of low pressure, about to the southeast of Honiara in the Solomon Islands. Over the next couple of days, the system moved erratically near northern Vanuatu and remained poorly organized, with convection located to the south of the low-level circulation center. The system started to move south-eastwards on 5 February, towards the Fijian Islands and a favorable environment for further development. The system subsequently passed near the island nation during 8 February, where it developed into a tropical depression and started to move north-eastwards towards the Samoan Islands.
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A tropical disturbance formed about 335 miles (540 km) south of Acapulco, Guerrero, early on June 22, only slowly consolidating into a tropical depression by 00:00 UTC on June 26\. On a westward track, it strengthened into Tropical Storm Bonny twelve hours after formation and further organized into a hurricane around 06:00 UTC on June 27, attaining peak winds of 75 mph (120 km/h). This forward trajectory brought the system over cooler waters, causing Bonny to weaken to rapidly weaken to a tropical depression by early on June 28\. It moved erratically before dissipating around 18:00 UTC the next day.
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Despite the unfavorable air pattern, the tropical disturbance gradually organized as it moved westward. Due to the large-scale circulation pattern of Tropical Storm Roger, Tip's precursor moved erratically and slowly executed a cyclonic loop to the southeast of Chuuk. A reconnaissance aircraft flight into the system late on October 4 confirmed the existence of a closed low-level circulation, and early on October 5, the Joint Typhoon Warning Center (JTWC) issued its first warning on Tropical Depression Twenty-Three-W. 220px While executing a loop near Chuuk, the tropical depression intensified into Tropical Storm Tip, though the storm failed to organize significantly due to the influence of Tropical Storm Roger.
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Toward the beginning of January, the ITCZ was active to the northeast of Madagascar, spawning a circulation east of Agalega that became a depression on January 3\. On the next day, the system was named Florine. Steered between a ridge to its northwest and northeast, the system moved erratically until January 5, when Florine began a steady movement to the south and later southwest. The change in trajectory was because the ridge to Florine's northeast had weakened. On January 6, the intensifying storm passed just west of St. Brandon, where a station recorded sustained winds of 115 km/h (71 mph) and gusts of .
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Tropical Cyclone Alan was considered to be one of the worst natural disasters experienced in French Polynesia. The system, first noted as a tropical disturbance on April 17, 1998 east of the Northern Cook Islands, initially moved erratically prior to its designation as Alan upon developing into a tropical cyclone on April 21\. The following day, Alan reached its estimated peak intensity with 10-minute maximum sustained wind speeds of , posing several forecasting challenges due to difficulties in establishing its location and intensity. On April 23, Alan appeared to become sheared with the low-level circulation center displaced about from the nearest atmospheric convection.
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Bobby slowed slightly and moved erratically as it neared the Western Australian coastline, turning southward while rapidly strengthening. It attained its peak intensity of 925 mbar (hPa; 27.32 inHg) at 0900 UTC on 24 February, producing 1-minute sustained winds upwards of 205 km/h (125 mph) and 10-minute winds of 195 km/h (120 mph), equivalent to a Category 3 hurricane on the Saffir–Simpson scale or a Category 4 cyclone on the Australian scale. Hurricane-force winds' radius around the cyclone's center decreased from to less than ; however, gale-force winds continued to reach as far as outward from the center, consistent with satellite imagery.
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An upper-level low that had been producing wind shear moved away from the system, though light shear continued. At the same time, the low-level center once again became separated from the convection, which was primarily confined to a cyclonic banding feature in the eastern half of the circulation. It remained weak as it moved erratically westward while east of the Bahamas on August 30\. Due to the influence of Hurricane Gustav's large circulation, Hanna suddenly took a sharp southerly turn and slowed down to drift while located to the north of the Turks and Caicos Islands. On September 1, as Hanna drifted to the south-southwest, convection increased and the storm began to intensify.
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Tropical Storm Fay was a strong and unusual tropical storm that moved erratically across the state of Florida and the Caribbean Sea. The sixth named storm of the 2008 Atlantic hurricane season, Fay formed from a vigorous tropical wave on August 15 over the Dominican Republic. It passed over the island of Hispaniola, into the Gulf of Gonâve, across the island of Cuba, and made landfall on the Florida Keys late in the afternoon of August 18 before veering into the Gulf of Mexico. It again made landfall near Naples, Florida, in the early hours of August 19 and progressed northeast through the Florida peninsula, emerging into the Atlantic Ocean near Melbourne on August 20\.
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Gustav moved erratically to the west-northwest toward the North Carolina-South Carolina border over the next two days, it slowly strengthened, acquiring more tropical characteristics. On September 10, a poorly organized band of stronger winds developed around the center, and Gustav was designated a fully tropical storm shortly before turning toward the north and brushing Cape Hatteras, then accelerating toward the northeast and away from the coast. On September 11, while under the influence of a non- tropical system over New England, Gustav quickly strengthened into a hurricane, in a process similar to the intensification of Hurricane Michael in 2000. Gustav reached its peak intensity of 100 mph (160 km/h) later that day.
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On April 17, 1998, the Fiji Meteorological Service (FMS) started to monitor the development of a tropical disturbance east of the Northern Cook Islands. Before the FMS initiated advisories on the system on April 19, the system moved erratically; it later developed into a weak depression while it located about north of Manihiki Atoll in the Northern Cook Islands. Over the next couple of days, the system slowly moved northwards, gradually organizing, with gale-force winds developing in its southern quadrant on April 20. Over the next day, the system developed into a category 1 tropical cyclone on the Australian tropical cyclone intensity scale, and the FMS subsequently named the system Alan at 1800 UTC.
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The system passed to the north of New Caledonia as a Category 4 severe tropical cyclone at around 0000 UTC on March 10, before it passed in between the Loyalty Islands of Belep and Surprise. Fran also moved across 160°E and into the Australian region as a Category 3 severe tropical cyclone during March 11, where the Australian Bureau of Meteorology (BoM) started to issue warnings on the system. Over the next few days, Fran maintained its intensity as a Category 3 severe tropical cyclone, as it slowed down and moved erratically towards Australia's Queensland Coast. During March 14, the BoM reported that Fran had weakened into a Category 2 tropical cyclone, while it was located about to the northwest of Yeppoon in Queensland.
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A few days after the dissipation of Hurricane Three, a new tropical storm on the cusp of hurricane intensity was identified about 630 mi (1,015 km) southeast of Bermuda around 06:00 UTC on September 1\. The system steadily strengthened as it moved erratically, attaining peak winds of 120 mph (195 km/h) by 06:00 UTC on September 4\. After passing within 120 mi (195 km) of Bermuda, delivering a period of tropical storm-force winds to the island, the hurricane was directed north and then northeast by a developing area of high pressure. It brushed Nova Scotia before moving ashore the southern coastline of Newfoundland, ultimately transitioning into an extratropical cyclone by 00:00 UTC on September 10\.
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During December 6, the FMS issued a tropical cyclone alert for American Samoa, before it issued a gale warning for the American territory later that day. Storm and hurricane warnings were subsequently issued during the next day, before the weather station at Pago Pago reported its first gale-force winds later that day at around 14:00 UTC (02:00 UTC+11). The hurricane warning was subsequently downgraded to a gale warning during December 8, as Val moved south-eastwards towards Savaii and the threat of the cyclone passing close to the American territory decreased. However, after Val had made landfall on Savaii, it moved erratically and performed a clockwise loop just to the southwest of Savaii, before it started to move eastwards towards American Samoa.
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On November 20, the FMS started to monitor a shallow tropical depression that had developed within the South Pacific Convergence Zone to the west of Wallis Island. Over the next three days the system moved towards the west-northwest and the Fijian dependency of Rotuma, before the JTWC initiated advisories and classified the depression as Tropical Cyclone 03P during November 24. TCWC Nadi subsequently named the system Sina after the depression had developed into a category 1 tropical cyclone on the Australian scale, while it was located about to the northwest of Rotuma. During the next day the cyclone continued to intensify and developed an eye as it moved erratically towards the west-southwest and performed a small clockwise loop.
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The storm moved erratically northward until becoming a hurricane on November 23 when it began accelerating to the northeast in response to strong upper-level flow from the north. Iwa passed within 25 miles of the island of Kauai with peak winds of 90 mph (145 km/h) on November 23 (November 24 Coordinated Universal Time), and the next day it became extratropical to the northeast of the state. The hurricane devastated the islands of Niihau, Kauai, and Oahu with wind gusts exceeding 100 mph (160 km/h) and rough seas exceeding 30 feet (9 m) in height. The first significant hurricane to hit the Hawaiian Islands since statehood in 1959, Iwa severely damaged or destroyed 2,345 buildings, including 1,927 houses, leaving 500 people homeless.
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Remaining a Category 4 hurricane as it moved erratically westward across the Caribbean, a reconnaissance flight mission during the night of September 25–26 indicated strong rainbands with frequent lightning strikes and a well-defined eye, evidence that the storm was once again rapidly intensifying. As it neared the Yucatán Peninsula on September 26, Janet began accelerating in forward speed. After the reconnaissance flight Snowcloud Five was lost while making a penetration into the hurricane's eye, another flight early on September 27 reported a minimum pressure of , with winds in excess of "by a large and incalculable amount." The hurricane was estimated to have intensified to Category 5 hurricane intensity—the highest rating on the modern-day Saffir–Simpson hurricane scale—at 1200 UTC on September 27, while in the western Caribbean Sea.
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