[13] Gale-force winds caused some serious damage to a wharf, on the atoll of Penhryn. [13][14] After it had been named: Prema moved south-eastwards and started to gradually weaken, before it degenerated into a depression during February 27. What months have the most hurricanes? https://www.worldatlas.com/articles/where-do-most-hurricanes-occur.html It began on November 1, 2006 and ended on April 30, 2007. [18], During the next day, Tomasi continued to intensify and move south-westwards, while the alert for Niue was upgraded to a gale warning. Another disturbance formed near the existing 01F and rapidly intensified into a depression. The Atlantic hurricane season runs from June 1st to November 30th, and the Eastern Pacific hurricane season runs from May 15th to November 30th. During March 27, the FMS started to monitor a depression that had developed, within a trough of low pressure about 235 km (145 mi) to the northeast of Penrhyn in the Northern Cook Islands. [13] On the atoll of Manihiki, the high seas reached the settlement, with minor damage to coconut trees reported as a result. [10] The system's organisation improved steadily over the next few days, and at 12:00 UTC on December 13, the Joint Typhoon Warning Center (JTWC) upgraded the depression to a tropical storm on the Saffir-Simpson hurricane wind scale. Eight products are displayed, most notably an inner core scale surface wind analysis. [11][12] Due to the deteriorating structure of the system, the FMS ceased advisories on Tropical Depression 01F at this time. [22] The storm continued rapidly intensifying and strengthened to a Category 5 tropical cyclone on the Australian scale, the highest rating possible, whilst completing its loop, with a central pressure of 929 mbar and wind speeds of 110 knots (125 mph). FP normally only experiences cyclones during El Nino years when sea temperatures farther east are warmer than the average. [12] The storm then weakened and degenerated into a low pressure system later on December 12. Oscar existed from February 23 to March 6. During February 25, a depression developed within a trough of low pressure, to the south-west of Manihiki in the Northern Cook Islands. Ahead of the cyclone season formally starting, the Fiji Meteorological Service (FMS), Australian Bureau of Meteorology (BoM), New Zealand's MetService and National Institute of Water and Atmospheric Research (NIWA) and various other Pacific Meteorological services, all contributed towards the Island Climate Update tropical cyclone outlook that was released during October 2020. *Spanish translations, when available, are courtesy of the NWS San Juan Weather Forecast Office. The Atlantic Hurricane Basin. [18] After the system was named, Tomasi went through a period of rapid intensification, with an eye appearing on visible satellite imagery during that day. [19] Tomasi subsequently turned and started to move southwards, as it passed about 165 km/h (105 mph) to the east of Niue. The Central Pacific, meanwhile, had its most active year on record, with 16 tropical cyclones forming in or entering the basin, easily surpassing the old record of 11 set in 1992 and 1994. The Eastern Pacific basin extends to 140°W. There are no tropical cyclones in the Atlantic at this time. [19] Later that day, the FMS reported that Tomasi had peaked as a Category 4 severe tropical cyclone, with 10-minute sustained winds of 185 km/h (115 mph). Because of the Fujiwhara effect, the remnant was absorbed by Tropical Depression 02F shortly afterward, which would later become Severe Tropical Cyclone Yasa. During El Niño, the area of tropical Pacific convection and its associated Hadley circulation expand eastward from the western Pacific, sometimes extending to the west coast of South America. This table lists all the storms that developed in the South Pacific to the east of 160th meridian during the 2020–21 season. The most intense tropical cyclone in the south Pacific, Cyclone Winston of 2016, is also the most … [23] This was the earliest date a Category 5 South Pacific tropical cyclone formed on record and only the second Category 5 South Pacific tropical cyclone recorded in the month of December. During December 11, the FMS reported that Tropical Disturbance 03F had developed about 480 km (300 mi) to the northeast of the island nation of Niue. RSMC Nadi, TCWC Wellington and TCWC Brisbane all use the Australian Tropical Cyclone Intensity Scale and estimate windspeeds over a period of ten minutes, while the JTWC estimated sustained winds over a 1-minute period, which are subsequently compared to the Saffir–Simpson hurricane wind scale (SSHWS). [3], In addition to contributing towards the Island Climate Update outlook, the FMS and the BoM issued their own seasonal forecasts for the South Pacific region. [19] About a day later, on December 13, the FMS determined that the depression had further strengthened to Category 1 status, as convection continued wrapping into the center, with the storm acquiring the name Yasa. The South Pacific is in a cyclone zone that typically has cyclones between 1st November and 31st April each year. While cyclones in this area of the Pacific Ocean may occur year-round, December through April are usually the most active months. Most modeling suggests that the Pacific will gradually warm through this preparation season and into the first half of hurricane season. There are no tropical cyclones in the Atlantic at this time. [7] At 00:00 UTC on December 11, the JTWC upgraded the system to a tropical storm on the Saffir–Simpson hurricane wind scale. The latest typhoon watches and warnings for the South Pacific Basin. The Atlantic hurricane season runs from June 1st through November 30th. [3] The outlook took into account the ENSO neutral conditions that had been observed across the Pacific and analog seasons, that had ENSO neutral and El Nino conditions occurring during the season. [29] Zazu brought heavy surf which severely damaged the wharf on Niue which was recently rebuilt while bringing rainy conditions to the island that same day. On December 8, a disturbance formed near Fiji, starting the 2020–21 South Pacific Ocean cyclone season, it gradually intensified into a depression and attained a tropical storm status according to JTWC. [17] The JTWC subsequently initiated advisories on the system and designated it as Tropical Cyclone 18P. [5] As a result, this made Joti one of the earliest tropical cyclones ever recorded within the basin. [5][6] The JTWC subsequently reported that the system had peaked with 1-minute sustained winds of 120 km/h (75 mph), which made it equivalent to a Category 1 hurricane on the SSHWS. It reached at the maximum 10 minutes sustained wind speed of 55 km/h (35 mph) and minimum pressure of 1000 mb (29.53 inHg). The BoM also predicted that the Eastern Region between 165°E and 120°W, had a 45% chance of seeing activity above its average of 6 tropical cyclones. Following the same day, another disturbance formed and intensified into a depression in the next day. [5][6] Over the next day, the disturbance gradually developed further, as its outflow increased and atmospheric convection surrounding the system organised. The next 10 names on the naming list are listed here below.[32]. [11] This expectation for tropical cyclone activity is close to normal for the region, but with elevated activity east of the International Date Line especially during the late season between February and April. Yasa continued its rapid intensification trend and further intensified to the equivalent of a high-end Category 4 tropical cyclone on the Saffir–Simpson scale (SSHWS), developing a well-defined and very clear eye, while continuing to become more symmetrical. Five of these tropical cyclones went on to affect the island nation of French Polynesia, which it was thought had not been affected by a tropical cyclone since another very strong El Nino episode in 1905-06. [6] Over the next couple of days, the system gradually moved westwards before the FMS classified it as a tropical depression during December 11, while it was located about 280 km (175 mi) to the west of the Fijian Dependency of Rotuma. [26] Zazu continued to strengthen even as it began an extratropical transition, reaching Category 2 status on the Australian scale on December 15, despite struggling with the effects of westerly wind shear. The service noted that these figures were revised in August with the expectation of 19 to 25 named storms, seven to eleven hurricanes and three to six major hurricanes. The Atlantic hurricane season runs from June 1st through November 30th. Please keep off-topic and political discussion to a minimum, and respect the guidelines listed to the right. On December 13, 15:00 UTC, 02F intensified into a Category 1 tropical cyclone Yasa according to Australian scale. [5] After it was named, Joti continued to develop as it completed a cyclonic loop, before it started to move south-westwards towards Vanuatu during November 2. The first tropical cyclone of the season is brewing across the South Pacific and it can bring impacts to Fiji and Vanuatu. [13], 01F caused heavy rain in American Samoa, with a peak rainfall total of 62 mm (2.44 in) recorded at the Pago Pago International Airport. Just about 12 hours later on December 14, Yasa rapidly intensified to Category 4 status on the Australian scale as a defined eye began to clear on infrared satellite imagery. During December 8, the FMS reported that Tropical Disturbance 01F had developed about 145 km (90 mi) to the northeast of Apia in Samoa. Convective rainbands began to develop around the system as it tracked slowly eastwards, wrapping into the low-level circulation centre. [19] During April 2, the system started to rapidly weaken, with its high clouds being sheared away, before it degenerated into a mid latitude depression. During March 23, a shallow tropical depression developed within a trough of low pressure, about 75 km (45 mi) to the northwest of Rotuma. [12] Over the next day, the system started to move south-westwards, while it rapidly intensified, with the FMS estimating 10-minute sustained wind-speeds of 185 km/h (115 mph) during February 24. [3] At least four of the tropical cyclones were expected to intensify further and become severe tropical cyclones, while it was noted that a Category 5 severe tropical cyclone could occur during the season. [8] The degenerating system subsequently passed to the west of Fiji during November 13, before it was last noted during November 16, as it passed over the island of Efate in Vanuatu but no damage was reported. During that day, gale-force winds were observed on Bora Bora before the system caused gas it passed to. It had no official bounds; it ran year-round in 1964, but most tropical cyclones tend to form in the northwestern Pacific Ocean between June and December. During that day, the system started to rapidly develop further as it moved and was named Rewa, as it had developed into a Category 1 tropical cyclone. [7] Environmental conditions were very favourable for tropical cyclogenesis, with radial outflow in the upper troposphere, low vertical wind shear, and sea surface temperatures near 30 °C (86 °F). [3] The outlook called for a near-average number of tropical cyclones for the 2020–21 season, with nine to twelve named tropical cyclones, predicted to occur between 135°E and 120°W, compared to an average of just over 10. The Tropical Cyclone Formation Probability Product provides an estimate of the probability of tropical cyclone formation within the next 24 hours in 1 by 1 degree latitude/longitude areas … During February 13, a depression developed just to the north of the Marquesas Islands and started moving south-westwards. During the season tropical cyclones were monitored by the meteorological services of Australia, Fiji, French Polynesia and New Zealand. William was one of the most northeasterly forming cyclones in the basin's history. [1], During the season, ten of the fourteen tropical cyclones observed to the east of 160 E were severe tropical cyclones, with 5 of them occurring in the French Polynesia region which represented one more than was experienced in the same area over the previous 13 seasons. Get the latest. There is relatively low disagreement between the analogues for the total number of cyclones for this season, with the one exception being the 2007/08 season. [30] Zazu also brought wind gusts up to 120 km/h (75 mph) to the island nation of Tonga, but no significant damage was reported. [3] In April 2015, a cyclone was suspected to have become subtropical near 102.9°W, and was unofficially named "Katie" by researchers. This hurricane season has rewritten the record books. 3). The full hurricane season is June 1st to November 30th for the Atlantic and the Caribbean each year, and the Eastern Pacific hurricane season starts in mid-May. The historic long-term seasonal average is just over 10 named cyclones for the SW Pacific basin. These conditions produce an anomalous upper-level, ridge-trough pattern in the subtropics, with an amplified ridge over the subtropical Pacific in the ar… Official Hurricane Season Dates. The 2018–19 season was one of the most active and longest South Pacific tropical cyclone seasons on record, with 14 tropical cyclones occurring within the South Pacific basin between 160°E and 120°W. [17][18] At 15:00 UTC December 12, the JTWC determined the system had strengthened into Tropical Cyclone 05P and was now producing winds up to gale force, while it absorbed the remnant of Tropical Depression 01F. Rewa exacerbated the destruction caused by Severe Tropical Cyclone Nisha/Orama earlier in the season and destroyed more than 200 houses. Mark existed from January 20 to February 1. However, if a tropical depression intensify to the south of 25°S between 160°E and 120°W it will be named by MetService in conjunction with the FMS. [24] By 00:00 UTC on December 16, Yasa had intensified into a Category 5-equivalent tropical cyclone on the SSHWS, with 1-minute sustained winds of 260 km/h (160 mph). The 2006–07 South Pacific cyclone season was an event in the annual cycle of tropical cyclone formation. [5] At this stage, the system had a broad low level circulation and was located within a marginal environment for further development, with warm sea surface temperatures as well as moderate levels of vertical wind shear. [13][14] The remnants of Prema were subsequently monitored over the next few days, as they moved towards and through French Polynesia, before they were last noted during March 6. Well offshore the season tropical cyclones affect Pacific island countries in most years and impact! 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