What does the probability indicate? While the system may have degenerated into an open trough of low-pressure on September28 amid strong easterly winds, it quickly reorganized and strengthened further before tracking across southern Luzon from Catanduanes to just south of Manila with winds of 85km/h (50mph). [13][143] Fifty thousand refugees from the People's Republic of China lost their shelters. By comparison, the U.S. Ohio-class submarines only displace about 19,000 tons. Careers. [27] The strong substropical ridging continued into October, leading to similar storm paths. Should the tropical depression intensify further it is named and classified as a tropical storm, which has winds speeds between 34-47 kn (17-24 m/s; 39-54 mph; 63-87 km/h). [178] The southern and eastern coasts of Kyushu, the southern coast of Shikoku, and Hygo Prefecture experienced the highest proportion of destroyed homes per capita. Firstly, the GridSat data set and the satellite of China Meteorological Administration were used to analyze the tropical cyclone scale data, and the typhoon data set was established. This initial disturbance traveled west-northwest, passing near Ulithi and Yap. [6]:98 The storm's winds continued to increase, and on July3 its winds reached 185km/h (115mph) before the rate of intensification stalled. [98] Between August67, Ida moved across northern Luzon with these winds. The .gov means its official. Unable to load your collection due to an error, Unable to load your delegates due to an error, Performance comparison results of different models (Note: M1 is the ANN model, M2 is the Recurrent Neural Network (RNN) model, M3 is the GCN model, M4 is the LSTM model, M5 is the GCNLSTM, and M6 is the RNNLSTM model, where 0200 is the test set and 2001000 is the training set). 91730304/National Natural Science Foundation of China, Uson M.A.M. For a full-size table please click on the image. The typhoon still dumped more rains and threw its tempest by early morning of December 11 at Northern Palawan. [104][106] Two people drowned after their ship sink off Kaohsiung, Taiwan, while four people went missing after their fishing boat sank offshore Tawian. The terms "hurricane" and "typhoon" are regionally specific names for a strong "tropical cyclone".A tropical cyclone is the generic term for a non-frontal synoptic scale low-pressure system over tropical or sub-tropical waters with organized convection (i.e. Typhoons are the same weather phenomenon as hurricane s, and both . [6]:75 Shortly after finding this feature, Tess was estimated to have attained typhoon status. Should the list of names for a given year prove to be insufficient, names are taken from an auxiliary list, the first 6 of which are published each year before the season starts (in this case, all of them are used up and more auxiliary names are given). Natural disasters and land grabs:The politics of their intersection in the Philippines following super typhoon Haiyan. [12], In May1964, the western Pacific was characterized by anomalously high geopotential heights towards the northern part of the basin and low geopotential heights in the tropical regions. To aid comparison. [213], Similar to the formation of Tropical Storm Iris, Tropical Storm Joan originated from a tropical disturbance over the western South China Sea on November5. Effect of Typhoons and Typhoon Classes. Overall framework of the GCNLSTM fusion model. How does the new classification affect the Tropical Cyclone Warning System in Hong Kong? The most important use of data classification is to understand the . The following day, the system quickly organized as it moved in a general eastward direction. The number of typhoons was a new record, topping the 24 set in 1962. [12]:75 Betty's winds subsequently began to diminish precipitously while the storm curved towards the north and then north-northeast, briefly paralleling the coast of Zhejiang before entering the Yellow Sea. [173], Wilda was one of the strongest typhoons to ever strike Japan as measured by atmospheric pressure, reaching Cape Sata in Kagoshima with a central pressure of 940hPa (mbar; 27.76inHg). Figure ( A ) shows the, Model stability test results. Some researches focused on the different shapes or the clusters of the typhoon trajectories. [12][226] Nineteen Philippine provinces were impacted by the storm. [144]:1 Numerous ships sank or ran aground at the Hong Kong Harbor. Typhoon Winnie (Local Name: Typhoon Dading) Typhoon Winnie begun on 24 June 1964 as a category 3 typhoon, it was the most destructive typhoon to hit the Philippines in 30 years, touching down at Manila and nearby provinces on 29 June 1964. . [253] A washout led to the derailing of eight coaches on passenger train carrying 1,500passengers in Quezon. [31] At noon on May21, the center of Tess passed 160km (100mi) west of Marcus Island,[12]:74 bringing squalls accompanied by heavy rain and winds of 90km/h (55mph). Tropical cyclones of different intensity are given different names. [63] At the time, the typhoon was located approximately 320km (200mi) south of Shanghai. [128][123][129] There were at least 238landslides caused by the typhoon, including one that derailed a passenger train in Oita Prefecture. [6]:47 Weakening commenced thereafter as the center of Sally passed north of Luzon on a west-northwestward heading on September9. [12] It moved towards the northeast across the Philippine Sea and became a tropical depression on July25. 10 whenever winds of such strength are expected near the sea level (Figure 1). The 1964 Pacific typhoon season was the most active tropical cyclone season . Once the tropical cyclone reaches winds of at least 39 mph (63 km/h) they are typically called a "tropical storm" and assigned a name. [8] This led to the formation of the ESCAP/WMO Typhoon Committee, which held its inaugural session in 1968. [22][138], The tropical disturbance that organized into Ruby arose from a tropical wave west of Saipan on August29. doi: 10.1038/s41598-019-42339-y. J. Glob. [182] The widespread flooding in the region overtopped dikes and disrupted air and rail traffic. IEEE J. Federal government websites often end in .gov or .mil. This site needs JavaScript to work properly. [72][6][12]:75 Doris became a tropical storm by 12:00UTC that day as it began to track northwest across the Philippine Sea. [218] This initial tropical cyclone was named Louise by the JTWC. [13]:66,74 Hong Kong recorded 300.6mm (11.83in) of rain in five days from the passing typhoon. [211] On November4, Iris intensified into a minimal typhoon, attaining winds of 120km/h (75mph)[212] and featured a circular 18mi (29km) wide eye. FOIA [209][6]:2125 Though winds as high as 240km/h (150mph) were estimated by aircraft reconnaissance investigating the typhoon during this period,[12]:78[6]:214 Hope's one-minute sustained winds in the JTWC's tracking data peaked at 140km/h (85mph). May limang (5) classification ang mga bagyo sa Pilipinas, ang una at pinakamahinang bagyo ay TROPICAL DEPRESSION na may lakas ng hangin na umaabot hanggang 61kph malapit sa gitna, samantala ang TROPICAL STORM ay bagyong may hanging 62 kph hanggang 88 kph. The Observatory does not anticipate that the introduction of typhoon classification will affect the existing contingency plans for tropical cyclones.. [139][140] After reaching the South China Sea, Ruby turned towards the northwest and intensified further. [23] Typhoons Kathy and Marie were involved in a Fujiwhara interaction that led both storms to rotate counterclockwise around each other, ending with Marie's absorption into Kathy's circulation. [75][76] Elsie continued to weaken after emerging into the South China Sea and dissipated on July19. The Typhoon-class is 566 feet long, 76 feet wide, and nearly 38 feet tall. Tracing a path similar to Tropical Storm Billie a week prior, the center of Clara passed south of Hainan on October7. Zeqiang Wang. Roughly 90% of structures in three provinces were damaged by the storms and nearly one million were estimated to have been left homeless. [12] Streets in Manila were flooded to waist-height from heavy rains and hgh waves. [176] The typhoon caused 47fatalities and 530injuries in Japan. -, Rttgers M., Lee S., Jeon S., You D. Prediction of a typhoon track using a generative adversarial network and satellite images. Typhoon definition: A tropical cyclone occurring in the western Pacific or Indian Oceans. In this report, we propose a deep learning technique for high-accuracy estimation of the intensity class of a typhoon from a single satellite image, by incorporating meteorological domain knowledge. A typhoon cyclone, often known as a tropical cyclone or hurricane, is a powerful circular storm that forms over warm tropical waters and is distinguished by low air pressure, strong winds, and heavy rain. An official website of the United States government. [29] Farther southeast, in Guam, the passing storm produced 52mm (2.03in) of rain. [80][12]:75 The USS Tawasa was dispatched to tow the stricken Weiss out to sea, but was itself grounded on an unforeseen pinnacle upon dislodging the Weiss. 2 - tropical . [115], According to the JTWC, Kathy was both the largest and longest-lived typhoon in 1964, with the agency issuing warnings for 13.5days and the storm's circulation reaching a diameter of 1575km (850mi). Bookshelf Super Typhoon Haiyan, also known as Super Typhoon Yolanda, made landfall in the Philippines on Nov. 8, 2013, as a Category 5 storm. [34], The Royal Observatory Hong Kong issued typhoon signal No. A peak gust of 59km/h (39mph) was registered on the island, as well as 14mm (0.55in) of rain. It tracked across southeastern Luzon and dissipated in the South China Sea the next day. The next day, the disturbance developed into a tropical depression and gradually took on a more westward course. Approximately 120,000homes were destroyed in Bataan, Bulacan, and Pampanga. Subtropical ridging in the Pacific was extended zonally throughout the month, resulting in strong easterly winds in the subtropical latitudes and providing conducive conditions for storm development. The torrents destroyed homes and left 10,000families homeless. The combined effects of Iris and Joan killed as many as 7,000people and led to the worst floods in six decades. For all typhoons requiring the Signal No.8 or above from 1950 to 2008, 75% were typhoons, 15% severe typhoons and 10% super typhoons. Kate strengthened into a typhoon on the 15th and a peak at 90mph(145km/h) winds the next day. [173] The storm passed over Shikoku and southern Honshu before emerging into the Sea of Japan and curving northeast. [220] On November19, Louise made landfall on Lanzua Bay in Surigao del Sur, Philippines, with winds of approximately 260km/h (160mph). [249][250] Opal caused significant property damage in Luzon and disrupted communications. John Chien-Han Tseng. Figure (, Model accuracy rate at different neuron ratios. [208] On October24, when it was west of Guam, the JTWC upgraded the system to tropical storm status based on aerial observations of the system. [12][160] The resulting floods killed at least 211people and injured 317others. 2022 May 31;8:e953. [68][12]:75 Storm warnings were issued in southeastern Luzon with Cora 100km (60mi) east of Samar, with forecasts projecting stormy conditions in the region and in other islands in the east-central Philippines. [12][99] Newswires reported disparate death tolls, with the Associated Press reporting 14fatalities, the Philippine News Service reporting 23, and United Press International reporting 79. [218] Louise was unusually close to the equator for a storm of its intensity; persisting at a strength equivalent to a Category5 hurricane on the SaffirSimpson scale at 7.3N, closer to the equator than any other Northern Hemisphere tropical cyclone of such intensity. [62][12]:75, The disturbance that led to Typhoon Betty was first detected in the Philippine Sea on July1 by the JTWC, having developed from a segment of a polar trough within an area of conducive winds in the upper-troposphere. Second, we coupled the . The storm then began to take an erratic path that continued for the next three days. 12.4C shows an area affected significantly by noise-like speckles and strong scatters, as identified through binary classification (Step A). [118][119] The typhoon's winds peaked at 165km/h (105mph) on August14 before tapering as the storm curved towards the west-southwest. [62][6]:92 Tracking towards the west-northwest, Alice's intensity fluctuated in its initial stages. -, Corcione V., Nunziata F., Migliaccio M. Megi typhoon monitoring by X-band synthetic aperture radar measurements. [219][218][12]:78 Louise continued to intensify after passing the island, and attained its peak intensity on November18 with one-minute sustained winds of 305km/h (190mph) and a central air pressure of 915hPa (mbar; 27.09inHg). [30] The next day, Tess reached its peak intensity with winds of 155km/h (100mph) and a minimum barometric pressure of 960hPa (mbar; 28.35inHg). Expand. [29], According to data from the Japan Meteorological Agency (JMA), the progenitor to Typhoon Viola emerged in the South China Sea just east of Vietnam on May21. 2018 Aug 1;99:24-37. doi: 10.1016/j.compbiomed.2018.05.019. A Long Short-Term Memory deep learning network for the prediction of epileptic seizures using EEG signals. After briefly taking a northeasterly track, Iris turned towards the southeast and reconnaissance planes recorded a developing eyewall. Please add explanation of subfigures in caption. [117][12]:76 On August25, Kathy transitioned into an extratropical cyclone and continued northeast towards the Aleutian Islands before it was last in the Bering Strait on September1. [253] The Philippine government designated 54provinces and cities disaster areas. All the Typhoon -class vessels that appear in Star Trek Online, regardless of affiliation, bear the same registry number, NCC-96047. Naval Base Subic Bay were evacuated into the South China Sea prior to the storm's arrival and people in low-lying fishing villages left for higher ground. Figure ( A , B ) illustrate the mean, MeSH -. [255], During the season 39named tropical cyclones developed in the Western Pacific according to the JTWC and named by the agency when it was determined that they had become tropical storms. What is a category 5 super typhoon? [6]:11 The JTWC issued 730warnings on 26typhoons, 14tropical storms, and 5tropical depressions. Typhoon Haiyan (Yolanda)- 2013 ; Typhoon Yolanda is one of the strongest tropical cyclones that hit the Philippines on November 8, 2013. Flooding broke through river embankments in 37locations and washed away 18bridges. [81] Flossie destroyed 15fishing boats and drowned 12fishermen off the western coast of the Korean peninsula; another 27fishermen was listed as missing. Accessibility [142] The strong winds and heavy rain caused widespread damage in Hong Kong, destroying thousands of homes and damaging thousands of others. [12]:76, Lorna began west of the Mariana Islands on August10 and took a northeastward path throughout its duration. In true #PhilAmFriendship, USAID partnered with Catholic Relief Services to. [6]:47 It rapidly weakened after reaching its peak strength. Ferry services were suspended in the territory. The storm then weakened and curved towards the west; the JTWC determine Marie to have been absorbed by Typhoon Kathy approximately 240km (150mi) north of Okinawa on August18. [12]:76 Tilda's meandering path disrupted shipping and led to the Royal Observatory keeping storm signals active for a record 161hours. The rainfall brought an end to an over two-year-long drought that had prompted a year-long water rationing in the territory. [6] The names were drawn sequentially from a set of four alphabetical naming lists and were all feminine. Kate made a curve to the west as a 60mph(97km/h) tropical storm. Some meteorological satellite cloud picture samples. Over 70,000homes were destroyed and nearly 45,000were inundated by the typhoon across the country,[177] leaving thousands of people homeless. Tropical cyclones with maximum sustained surface . [86] The precursor disturbance formed on July25 and took an initially northward track, veering west and organizing into a tropical depression on July26. Super typhoons are the equivalent of a at least a high-end Category 4 hurricane on the . Fig. 10; this warning was in effect for nearly four hours. TYPHOON (TY) - a tropical cyclone with maximum wind speed of 118 to 220 kph. Continuing to intensify, Clara curved west over the central Philippine Sea on October3 and strengthened into a typhoon the next day according to data from the JTWC. Figure (. Bethesda, MD 20894, Web Policies Further weakening ensued as the system tracked across northern Vietnam and southwest China before dissipating on July4. The Graph Convolutional Network (GCN) is used to process the irregular spatial structure of satellite cloud pictures effectively, and the Long Short-Term Memory (LSTM) network is utilized to learn the characteristics of satellite cloud pictures over time. Tropical Depression 37W formed west of Kawalein on October 8, peaking at a 50mph(80km/h) tropical storm and was given the name Ellen. In 1964, Typhoon Dading, the strongest typhoon to hit the country in three decades, left half a million people homeless. [117][12]:76, According to the publication Climatological Data, Kathy caused at least 13deaths and "numerous" injuries, with landslides and flooding being the principal cause of the casualties; as much as 700mm (28in) of rain was documented in the mountainous regions of Kyushu, though cities averaged 100m (4in) in rainfall accumulations. Dot then curved towards the west and made landfall on northern Luzon the following day with one-minute sustained winds of 130km/h (80mph). [22][115][6]:63 However, data from the CMA and JMA indicates that June persisted as a tropical depression into the South China Sea and took a looping course near Hainan and the Leizhou Peninsula. [198][201] At Tate's Cairn, a maximum wind gust of 220km/h (137mph) was measured. [46] Winnie weakened as it moved over Luzon and restrengthened upon reaching the South China Sea, taking a west-northwesterly heading. Keywords: [227] Widespread destruction occurred in Surigao City, where the storm killed 312people and caused US$12.5million in damage. MHI Vestas and Siemens Gamesa explain how to typhoon-proof an offshore wind turbine. Thirteen fishermen were overcome by the 7.6-9.1 m (25-30 ft) swells off the coast of Weizhou Island. [134][12]:76[6]:155 However, the CMA and JMA assessed Marie to have remained intact, continuing on a curved path towards the south and then east, bringing it around Okinawa as a tropical cyclone until its dissipation on August20. damage. [149][153][99] Over 10,000people were evacuated out of vulnerable areas in Hong Kong as the storm was feared to strike with a severity comparable to Typhoon Ruby a week prior. [12][230][231][232] A state of calamity was declared for Surigao del Norte,[233][234] prompting an intense relief effort amid an ongoing cholera epidemic and unrelated flooding. [46][12]:74 The air traffic control tower at Manila International Airport was put out of commission following wind damage. [62] According to the agency, Alice was the smallest typhoon of 1964, with a radius of 320km (200mi). Artificial Intelligence Algorithm-Based Economic Denial of Sustainability Attack Detection Systems: Cloud Computing Environments. Modified wind signals In Hong Kong, such sustained wind speeds are rare over land and are usually experienced during the close passage of a mature typhoon. Its center passed between Alamagan and Guguan on May20 while maximum sustained winds in the typhoon were 140km/h (85mph). [87] Winds of 135mph (84km/h) were experienced on the island. As far as submarines go, the Typhoon class has no equal. Lorna dissipated on August14 north of Agrihan. [100], Tropical Storm June began south of Guam as a disturbance on August9. In this report, we propose a deep learning technique for high-accuracy estimation of the intensity class of a typhoon from a single satellite image, by incorporating meteorological domain knowledge. ii) Tropical Storm: Maximum wind speed at the center reaches 48 to 64 knots (25 m/s - 33 m/s) or, iii) Typhoon: Maximum wind speed at the center reaches 64 to 85 knots (33 m/s - 44 m/s) or scale, iv) Severe Typhoon: Maximum wind speed at the center exceeds 85 knots (44 m/s) or over scale. [52] Heavy rains from the combination of Winnie and the southwest monsoon flooded entire neighborhoods in Manila. [70][71] By July10, Cora had weakened to a tropical depression. All damage figures will be in 1964USD. The PAGASA warning system issues a storm signal no higher than Number 2. [121][12]:76 United Press International reported as many as 24fatalities and 8missing persons associated with the typhoon,[122][123] with the Associated Press documenting 28injuries. The site is secure. Tropical cyclones are classified in accordance with the World Meteorological Organization's recommendation by their maximum sustained wind speeds near the centre. PAGASA uses its own naming scheme that starts in the Filipino alphabet, with names of Filipino female names ending with "ng" (A, B, K, D, etc.). [175] Wilda slightly weakened following peak strength before curving northward and making landfall on Kagoshima on September24; one-minute sustained winds three hours prior to landfall were estimated to be 185km/h (100mph). classified by size. Pressures across most of the western Pacific were lower than average, particularly around Okinawa where tropical cyclone activity was high during the month. [22] Nancy maintained low-end tropical storm intensity at peak strength before being downgraded to a tropical depression the next day approximately 480km (300mi) northeast of Iowa Jima, after which it dissipated. [85] During this period, the JTWC considered Grace to have temporarily lost its tropical cyclone status,[6]:61 becoming an indescript collection of squalls. Tropical Cyclone Formation and Activity Calendar of 1964. Super typhoon: the maximum average wind speed near the bottom center is over 51.0 meters per second or level 16 or above. [29][12]:74 On May19, a reconnaissance flight investigating Tess observed two eyes: the first and innermost eye measured 9.7km (6mi) across while the second was asymmetrical, with axes roughly 23km (14mi) and 14km (9mi) across. The Typhoon -class is the only Federation starship class in Star Trek Online that lacks a playable version. Epub 2018 May 17. The Observatory will consider issuing the Hurricane Signal No. After traversing the Yellow Sea, Flossie made landfall on North Korea along the coast of the Korean Bay on July29 with winds estimated at 100km/h (65mph). In the North Atlantic, Eastern North . J. . doi: 10.1080/02255189.2017.1308316. The storm brought 76-127 mm (3-4 in) to most of the affected areas, with locally higher amounts. Home; About Us. The JTWC assessed that Olga lasted more briefly, beginning as a tropical depression on August23 and peaking as a tropical storm the next day with one-minute sustained winds of 85km/h (50mph). Classification and intensity values will be based on estimations conducted by the JMA. [35][110] Another seven people were killed in Korea following rains associated with Ida. [16] Six typhoons and two tropical storms struck Vietnam, including three tropical cyclones in a twelve-day period in November. [12]:76 According to the JTWC, Tilda's one-minute maximum sustained winds crested at 165km/h (105mph) before their speeds began to decrease. [167]:44 Most buildings at the U.S. Marines base in Da Nang sustained water damage and lost power for over a week. These massive naval vessels stretch out to a length of 175 m (574 feet) and have a submerged displacement of 48,000 tons. It is sometimes confused with other submarines, as Akula is the name NATO uses to designate the Russian Project 971 Shchuka-B (-) class attack submarines. In order to explore the impact of pandemics on people's lives, it is . [12]:77[167]:76 Storm surge at Lng C reached 1.7m (5.6ft). [6]:50 Between August1516, Kathy briefly fell to tropical storm intensity before regaining typhoon status southeast of Amami shima. [172][12]:77 The system quickly strengthened and reached tropical storm and later typhoon intensity on September14. Tent homes in Angaur and Peleliu were inundated by storm surge. [18] The first half of June marked a reversal of this pattern as a large area of low pressure became established over the mid-Pacific. Dmitry Donskoy (TK 208) was the first of the six members of the class to be commissioned in 1981, followed by TK 202 in 1983, Simbirsk (TK 12) in 1984, TK 13 in 1985, Arkhangelsk (TK 17) in 1987, and Severstal (TK 20) in . [163], The precursor disturbance to Tilda was identified northwest of Guam using the Automatic Picture Transmission system during the 10-day operational lifespan of the Nimbus 1 satellite. [173] Based on data from the JMA, this was tied for lowest central pressure of any typhoon in 1964, along with Typhoon Sally. Stud. The tropical storm passed south of Hainan and made landfall on Vietnam near Vinh on October23, after which it dissipated. The results show that: the algorithm performance of this model is better than other prediction models; the prediction accuracy rate of typhoon level classification reaches 92.35%, and the prediction accuracy of typhoons and super typhoons reaches 95.12%. -, Ding X., Chen Y., Pan Y., Reeve D. Fast ensemble forecast of storm surge along the coast of China. [72], Elsie emerged from a detached portion of a polar trough on July13 near the Northern Mariana Islands; this developed into a tropical depression later that day. [26] In September, tropical cyclone activity was high across the Northern Hemisphere in both the Atlantic and Pacific. [53] Thousands of trees were uprooted and basic utilities were brought down by the storm;[56] Manila was without power or water for at least 36hours. [167]:76 It weakened quickly over land with the JTWC issuing its last advisory on the system on September15 and the CMA considering the system to have dissipated on September16. [29][6]:50,74 During this process, it strengthened into a tropical storm, weakened to a tropical depression, and reattained tropical storm intensity before heading on an east-northwestward to northeastward trajectory. Clara's winds topped out at 150km/h (90mph) as it made landfall on the coast of Aurora at Dilasac Bay on October5. Draw typhoon birthplaces on the map. doi: 10.1109/JOE.2017.2700558. Please enable it to take advantage of the complete set of features! [77][12]:75 The U.S. Navy ships George Clymer and the El Dorado collided at Okinawa amid Flossie's gale-force winds;[78][12]:75 one ship sustained a hole 0.9m (3ft) wide in her bow. As it tracked farther inland, Ida weakened and later dissipated on August12. [134], Nancy directly originated from a segment of a tropical upper-tropospheric trough, an atmospheric feature that was farther north than average in mid-August1964. [239], Opal formed from a tropical wave moving through the Caroline Islands in early December, with an initial wind circulation developing by December8. Damages and deaths from a storm will include when the storm was a precursor wave or an extratropical low. For example, WSP 80% indicates that 80 times out of 100 forecasts that the storm radius of 30 kt winds passes through a given location, 80% for the WSP-6h indicates that 80 times out of 100 forecasts that the storm radius of 34 kt winds passes through a given location during an . [243] Philippine Airlines cancelled all flights scheduled for the afternoon of December14 and the U.S. military moved its Luzon-based aircraft to safety. Typhoon Fengshen (known locally as Typhoon Frank) was a Category 3 typhoon and the sixth typhoon that hit the Philippines in June 2008. . Dtudes Dv. The 1964 Pacific typhoon season was the most active tropical cyclone season recorded globally, with a total of 39 tropical storms forming. However, a few days after Iris moved through the country, Tropical Storm Joan worsened the situation significantly. [11] Upon its detection, it was 1000km (620mi) southeast of Okinawa. dollars.[204]. [12]:83[6]:232 Two days later, the system became a tropical depression, and reached tropical storm intensity on November15. [30][148] On September7, Sally reached its peak intensity over the Philippine Sea with winds of 315km/h (195mph) and a central pressure of 895hPa (mbar; 26.43inHg). PAGASA assigns names to tropical depressions that form within their area of responsibility and any tropical cyclone that might move into their area of responsibility. Assertiveness Skills; Choices for Developing Emotional Intelligence