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The Saffir–Simpson hurricane wind scale (SSHWS) classifies hurricanes—which in the Western Hemisphere are tropical cyclones that exceed the intensities of tropical depressions and tropical storms—into five categories distinguished by the intensities of their sustained winds. This measuring system was formerly known as the Saffir–Simpson hurricane scale, or SSHS.
Tropical cyclone warnings and watches are alerts issued by national weather forecasting bodies to coastal areas threatened by the imminent approach of a tropical cyclone of tropical storm or hurricane intensity. They are notices to the local population and civil authorities to make appropriate preparation for the cyclone, including evacuation of vulnerable areas where necessary. It is important that interests throughout the area of an alert make preparations to protect life and property, and do not disregard it on the strength of the detailed forecast track.
This article describes severe weather terminology used by the National Weather Service (NWS) in the United States. The NWS, a government agency operating as an arm of the National Oceanic and Atmospheric Administration (NOAA) branch of the United States Department of Commerce (DoC), defines precise meanings for nearly all of its weather terms.
Typhoon Omar of 1992, known in the Philippines as Typhoon Lusing, was the strongest and costliest typhoon to strike Guam since Typhoon Pamela in 1976. The cyclone formed on August 23 from the monsoon trough across the western Pacific Ocean. Moving westward, Omar slowly intensified into a tropical storm, although another tropical cyclone nearby initially impeded further strengthening. After the two storms became more distant, Omar quickly strengthened into a powerful typhoon. On August 28, it made landfall on Guam with winds of 195 km/h (120 mph). The typhoon reached its peak intensity the next day, with estimated 1‑minute winds of 240 km/h (150 mph), making it a "super typhoon" according to the Joint Typhoon Warning Center (JTWC). Omar weakened significantly before striking eastern Taiwan on September 4, proceeding into eastern China the next day and dissipating on September 9.
Tropical cyclones are ranked on one of five tropical cyclone intensity scales, according to their maximum sustained winds and which tropical cyclone basins they are located in. Only a few scales of classifications are used officially by the meteorological agencies monitoring the tropical cyclones, but other scales also exist, such as accumulated cyclone energy, the Power Dissipation Index, the Integrated Kinetic Energy Index, and the Hurricane Severity Index.
The 1949 Pacific typhoon season has no official bounds; it ran year-round in 1949, but most tropical cyclones tend to form in the northwestern Pacific Ocean between June and December. These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean.
Typhoon Karen was the most powerful tropical cyclone to strike the island of Guam, and has been regarded as one of the most destructive events in the island's history. It was first identified as a tropical disturbance on November 6, 1962, well to the southeast of Truk. Over the following two days, the system tracked generally northward and quickly intensified. Karen became a tropical storm late on November 7, and within two days it explosively intensified into a Category 5-equivalent super typhoon on the Saffir–Simpson scale. Turning westward, the typhoon maintained its intensity and struck Guam with winds of 280 km/h (170 mph) on November 11. Once clear of the island, it strengthened slightly and reached its peak intensity on November 13 with winds of 295 km/h (183 mph) and a barometric pressure of 894 mb. The storm then gradually turned northward as it weakened, brushing the Ryukyu Islands on November 15, before moving east-northeastward over the open waters of the Pacific. Karen continued to weaken and transitioned into an extratropical cyclone on November 17 before losing its identity the following day between Alaska and Hawaii.
Typhoon Dot, known in the Philippines as Typhoon Saling, was the strongest storm of the 1985 season. Dot originated from a small area of thunderstorm activity in early to mid October. The system was first classified on October 11, and steadily intensified over the next few days. Dot attained typhoon strength on October 15, and subsequently entered a period of explosive deepening, which was not anticipated by forecasters. The next day the intensification rate slowed, but that evening, Dot attained its maximum intensify. A steady weakening trend began on October 17, though the system maintained typhoon intensity through the passage of the Philippines. After entering the South China Sea late on October 18, Dot briefly re-intensified, only to weaken as it approached Vietnam. On October 21, Dot struck Vietnam while still a typhoon, but dissipated the next day over the high terrain of the nation.
This article describes severe weather terminology used by the Meteorological Service of Canada, a branch within Environment and Climate Change Canada. The article primarily describes various weather warnings, and their criteria. Related weather scales and general weather terms are also addressed in this article. Some terms are specific to certain regions.
Typhoon Shanshan, known in the Philippines as Typhoon Luis, was a strong typhoon that affected parts of East Asia in late September 2006. The 13th named storm of the 2006 Pacific typhoon season, Typhoon Shanshan was also the seventh typhoon of the year operationally recognised by the Japan Meteorological Agency. In post-operational analysis Shanshan became the eighth typhoon of the year when Typhoon Maria was added to the list. The Joint Typhoon Warning Center considered Shanshan the 13th tropical storm and eighth typhoon of the season, a Category 4-equivalent typhoon in terms of 1-minute average wind speed. The name Shanshan was submitted to the naming list by Hong Kong and is a girls' given name.
Typhoon Dianmu, known in the Philippines as Typhoon Helen, was a powerful typhoon that struck southeastern Japan during the 2004 Pacific typhoon season. The name Dianmu is the name of the goddess of thunder and lightning in Chinese folklore.
Typhoon Sinlaku, known in the Philippines as Typhoon Marce, was a typhoon which affected the Philippines, Taiwan, China and Japan. It was recognised as the 13th named storm and the ninth typhoon of the 2008 Pacific typhoon season by the Japan Meteorological Agency.
The following outline is provided as an overview of and topical guide to tropical cyclones:
Tropical Depression 18W was a weak, short-lived tropical cyclone that brought heavy rains to parts of the Mariana Islands ahead of the more intense Typhoon Melor. Forming from an area of low pressure on September 26, 18W was first monitored by the Japan Meteorological Agency (JMA) as a tropical depression. Tracking generally towards the west, deep convection gradually developed around the system and the Joint Typhoon Warning Center (JTWC) issued their first advisory on the depression early on September 28. Although the depression initially struggled to maintain deep convection, it eventually became better organized and was upgraded to a tropical storm on September 29 by the JTWC. Several hours after reaching this intensity, the system began to rapidly dissipate as its inflow and outflow were severely disrupted by two nearby storms, Parma to the west and Melor to the east. The cyclone fully dissipated near Guam early on September 30 before being absorbed by Typhoon Parma.
Typhoon Kompasu, known in the Philippines as Typhoon Glenda, was a strong tropical cyclone that moved along Okinawa, Japan and west coast of the Korean Peninsula before striking the Seoul Metropolitan Area in early-September 2010. It was the first significant system to directly strike the Seoul Metropolitan since Typhoon Prapiroon in 2000 and the strongest typhoon to directly impact the area since Tropical Storm Janis in 1995.
The following is a glossary of tropical cyclone terms.
Typhoon Rammasun, known in the Philippines as Typhoon Glenda, was one of the only three Category 5 super typhoons on record in the South China Sea, with the other ones being Pamela in 1954 and Rai in 2021. Rammasun had destructive impacts across the Philippines, South China, and Vietnam in July 2014. Rammasun is a Siamese word for thunder god. After Lingling and Kajiki earlier in 2014, Rammasun became the third tropical cyclone, and first typhoon to directly impact the Philippines in 2014. The ninth named storm and the third typhoon of the annual typhoon season, Rammasun formed in the Intertropical Convergence Zone, an area near the equator where the northeast and southeast trade winds come together, and slowly drifted northwest. Having passed through the islands of Micronesia, the system turned west and quickly moved under the influence of a subtropical ridge (STR). Rammasun posed a significant threat to the Philippine island of Luzon, as it was expected to reach typhoon intensity before making landfall there. Though initially forecast to make landfall in Cagayan Valley, the storm followed a more westerly path and was later forecast to make landfall in the Bicol Region and then pass through Bataan and Zambales before brushing past Metro Manila.
Typhoon Halola, known in the Philippines as Typhoon Goring, was a small but long-lived tropical cyclone in July 2015 that traveled 7,640 km (4,750 mi) across the Pacific Ocean. The fifth named storm of the 2015 Pacific hurricane season, Halola originated from a Western Pacific monsoon trough that had expanded into the Central Pacific by July 5. Over the next several days, the system waxed and waned due to changes in wind shear before organizing into a tropical depression on July 10 while well southwest of Hawaii. The depression strengthened into Tropical Storm Halola on the next day as it traveled westward. Halola crossed the International Date Line on July 13 and entered the Western Pacific, where it was immediately recognized as a severe tropical storm. The storm further strengthened into a typhoon over the next day before encountering strong wind shear on July 16, upon which it quickly weakened into a tropical depression as it passed south of Wake Island. However, the shear relaxed on July 19, allowing Halola to reintensify. On July 21, Halola regained typhoon status and later peaked with 10-minute sustained winds of 150 km/h (93 mph) and a minimum pressure of 955 hPa. From July 23 onward, increasing wind shear and dry air caused Halola to weaken slowly. The system fell below typhoon intensity on July 25 as it began to recurve northwards. Halola made landfall over Kyushu on July 26 as a tropical storm and dissipated in the Tsushima Strait shortly after.
Typhoon Emma was a strong typhoon that struck Okinawa during the 1959 Pacific typhoon season. An area of severe weather formed near Kwajalein Atoll on October 30, and the Japan Meteorological Agency (JMA) began tracking it as a tropical depression on November 1. The Joint Typhoon Warning Center followed suit on November 5 after finding a closed circulation, and the depression received the name Emma. The depression strengthened into a tropical storm west of Guam on November 6 and gradually gained strength. Emma became a typhoon on November 11 near Luzon, and it reached its peak sustained winds of 205 km/h; 125 mph (110 kn) later that day. The typhoon turned northeastwards and grazed Okinawa the next day. Emma steadily weakened and became extratropical on November 13, and the JMA ceased tracking the storm on November 15.
Typhoon Man-yi, known in the Philippines as Typhoon Bebeng, was a powerful tropical cyclone that battered Japan as a weakening typhoon and became the second super typhoon of the 2007 Pacific typhoon season, just after Yutu. The fourth named storm and the third typhoon of this season, Man-yi formed from a monsoon trough near the Philippines on July 5. The disturbance gradually organized and on 12:00 UTC on July 27, the JTWC issued a TCFA for the developing system. Under favorable conditions, the disturbance rapidly organized to a tropical storm, with the JMA naming it Man-yi. As it entered the Philippine Area of Responsibility on July 11, the storm explosively organized on the Philippine Sea, before passing near Okinawa on 13:00 UTC on the next day. Man-yi began to weaken on July 13 due to increasingly unfavorable conditions, before scraping southern Japan on the night of the same day. Due to the deteriorating conditions of the typhoon, the JMA and the JTWC downgraded the system to a tropical storm, before issuing their final warning as it became extratropical on July 15.
References
- 1 2 "Air Combat Command > Severe Weather Readiness" . Retrieved 2021-12-27.
- ↑ "Eglin Air Force Base - Hurricane Season". Archived from the original on 2008-02-22. Retrieved 2008-05-06.
- ↑ "Kadena AB Typhoon Guide Vol 03" (PDF). kadena.af.mil.