Typhoons in the Philippines

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Signal #1
winds of 30–60 km/h (20-35 mph) are expected to occur within 36 hours
Signal #2
winds of 60–100 km/h (40-65 mph) are expected to occur within 24 hours
Signal #3
winds of 100–185 km/h, (65-115 mph) are expected to occur within 18 hours.
Signal #4
winds of at least 185 km/h, (115 mph) are expected to occur within 12 hours.
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Super Typhoon Mike, locally known as Ruping, near peak intensity
Super Typhoon Haiyan (locally known as Yolanda)

In the Philippines, tropical cyclones (typhoons) are called bagyo.[1] Tropical cyclones entering the Philippine Area of Responsibility are given a local name by the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), which also raises public storm signal warnings as deemed necessary.[2][3] Around 19 tropical cyclones or storms enter the Philippine Area of Responsibility in a typical year and of these usually 6 to 9 make landfall.[4][5]

The deadliest overall tropical cyclone to impact the Philippines is believed to have been the September 1881 typhoon which is estimated to have killed up to 20,000 people as it passed over the country in September 1881. In modern meteorological records, the deadliest storm was Typhoon Haiyan, which became the strongest landfalling tropical cyclone ever recorded as it crossed the Central Philippines on November 7-8, 2013. The wettest known tropical cyclone to impact the archipelago was the July 14–18, 1911 cyclone which dropped over 2,210 millimetres (87 in) of rainfall within a 3-day, 15-hour period in Baguio City.[6] Tropical cyclones usually account for at least 30 percent of the annual rainfall in the northern Philippines while being responsible for less than 10 percent of the annual rainfall in the southern islands.

The Philippines is the most-exposed large country in the world to tropical cyclones, and it has even affected settlement patterns in the northern islands; for example, the eastern coast of Luzon is very sparsely populated.

Etymology and naming conventions[edit]

The term bagyo, a Filipino word meaning typhoon arose after a 1911 storm in the city of Baguio had a record rainfall of 46 inches within a 24-hour period.[1][7][8]

Names of storms[edit]

Since the middle of the 20th Century, American forecasters have named tropical storms after people, originally using only female names.[9] Philippine forecasters from the now-PAGASA started assigning Filipino names to storms in 1963 following the American practice, using names of people in alphabetical order, from A to Z.[9] Beginning in January 2000, the World Meteorological Organization"s Typhoon Committee began assigning names to storms nominated by the 14 Asian countries who are members with each country getting 2 to 3 a year.[9] These names, unlike the American and Filipino traditions, are not names for people exclusively but include flowers, animals, food, etc. and they are not in alphabetical order by name but rather in alphabetical order by the country that nominated the name.[9] After January 2000, Filipino forecasters continued their tradition of naming storms that enter the Philippines Area of Responsibility and so there are often two names for each storm, the PAGASA name and the so-called "international name".

Variability in activity[edit]

On an annual time scale, activity reaches a minimum in May, before increasing steadily through June, and spiking from July through September, with August being the most active month for tropical cyclones in the Philippines. Activity falls off significantly in October.[10] The most active season, since 1945, for tropical cyclone strikes on the island archipelago was 1993 when nineteen tropical cyclones moved through the country (though there were 36 storms that were named by PAGASA).[11] There was only one tropical cyclone which moved through the Philippines in 1958.[12] The most frequently impacted areas of the Philippines by tropical cyclones are northern Luzon and eastern Visayas.[13] A ten-year average of satellite determined precipitation showed that at least 30 percent of the annual rainfall in the northern Philippines could be traced to tropical cyclones, while the southern islands receive less than 10 percent of their annual rainfall from tropical cyclones.[14]

Public Storm Warning Signals[edit]

Signal #1
winds of 30–60 km/h (20-35 mph) are expected to occur within 36 hours
Signal #2
winds of 60–100 km/h (40-65 mph) are expected to occur within 24 hours
Signal #3
winds of 100–185 km/h, (65-115 mph) are expected to occur within 18 hours.
Signal #4
winds of at least 185 km/h, (115 mph) are expected to occur within 12 hours.

The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) releases tropical cyclone warnings in the form of Public Storm Warning Signals.[3] An area having a storm signal may be under:

These storm signals are usually raised when an area (in the Philippines only) is about to be hit by a tropical cyclone. As a tropical cyclone gains strength and/or gets nearer to an area having a storm signal, the warning may be upgraded to a higher one in that particular area (e.g. a signal No. 1 warning for an area may be increased to signal #3). Conversely, as a tropical cyclone weakens and/or gets farther to an area, it may be downgraded to a lower signal or may be lifted (that is, an area will have no storm signal).

Classes for Preschool are canceled when Signal No. 1 is in effect. Elementary and High School classes and below are cancelled under Signal No. 2 and classes for Colleges and Universities and below are cancelled under Signal No. 3 and Signal No. 4.

Deadliest Cyclones[edit]

Haiyan/Yolanda at peak strength
Rank[15]StormDates of impactDeaths
1September 1881 typhoon1881, September 2720,000
2Haiyan/Yolanda 20132013, November 7–86,241[17]
4Bopha/Pablo 20122012, December 2–91,901
5Angela Typhoon1867, September 221,800[18]
6Winnie 20042004, November 27–301,593
7October 1897 Typhoon1897, October 71,500[18]
8Ike/Nitang 19841984, September 3–61,492
9Fengshen/Frank 20082008, June 20–231,410
10Durian/Reming 20062006, November 29-December 11,399

Most destructive[edit]

Animated enhanced infrared satellite loop of Typhoon Haiyan from peak intensity to landfall in the Philippines
Costliest Philippine typhoons
RankNamesDates of impactPHPUSDRef
1Haiyan, (Yolanda)November 3 – 11, 201389.6 billion2.86 billion[19]
2Bopha, (Pablo)November 25 – December 9, 201242.2 billion1.04 billion[20]
3Parma, (Pepeng)October 2 – 10, 200927.3 billion608 million[21]
4Nesat, (Pedring)September 26 – 28, 201115 billion333 million[22]
5Fengshen, (Frank)June 20 – 23, 200813.5 billion301 million[23]
6Ketsana, (Ondoy)September 25 – 27, 200911 billion244 million[21]
7Mike, (Ruping)November 10 – 14, 199010.8 billion241 million[24]
8Angela, (Rosing)October 30 – November 4, 199510.8 billion241 million[24]
9Flo, (Kadiang)October 2 – 6, 19938.75 billion195 million[24]
10Megi (Juan)October 18 – 21, 20108.32 billion193 million[25]

Wettest recorded tropical cyclones[edit]

Wettest tropical cyclonein the Philippine islands
Highest known totals
12210.087.01July 1911 cycloneBaguio City[6]
21216.047.86Carla 1967Baguio City[6]
31085.842.45Utor/Feria 2001Baguio City[26]
41012.739.87Mindulle/Igme 2004[27]
5994.639.16Zeb/Iliang 1998Baguio City[27]
6902.035.51Kujira/Dante 2009[28]
7869.634.24Dinah/Openg 1977Western Luzon[29]
8817.932.20Elaine 1974Baguio City[30]
9782.330.80Bess/Susang 1974Baguio City[31]
10723.029.46Linfa/Chedeng 2003Tondoligan Park, Dagupan, Pangasinan[32]

See also[edit]


  1. ^ a b Glossary of Meteorology. Baguio. Retrieved on 2008-06-11.
  2. ^ Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division. "Frequently Asked Questions: What are the upcoming tropical cyclone names?". NOAA. Retrieved 2006-12-11. 
  3. ^ a b Republic of the Philippines. Department of Science and Technology. Philippine Atmospheric, Geophysical and Astronomical Services Administration. (n.d.). The Modified Philippine Public Storm Warning Signals. Retrieved February 24, 2011.
  4. ^ Joint Typhoon Warning Center. Appendix B: Characteristics of Tropical Cyclones Affecting the Philippine Islands (Shoemaker 1991). Retrieved on 2008-04-20.
  5. ^ Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA). (January 2009). "Member Report to the ESCAP/WMO Typhoon Committee, 41st Session". Retrieved 2009-12-17. 
  6. ^ a b c J. L. H. Paulhaus (1973). World Meteorological Organization Operational Hydrology Report No. 1: Manual For Estimation of Probable Maximum Precipitation. World Meteorological Organization. p. 178. 
  7. ^ English, Fr. Leo James (2004, 19th printing), Tagalog-English Dictionary, Manila: Congregation of the Most Holy Redeemer, p. 117, ISBN 971-08-4357-5  Check date values in: |date= (help)
  8. ^ Philippine Center for Language Study; Jean Donald Bowen (1965), Jean Donald Bowen, ed., Beginning Tagalog: a course for speakers of English (10 ed.), University of California Press, p. 349, ISBN 978-0-520-00156-5 
  9. ^ a b c d "Names". Typhoon2000.com. David Michael V. Padua. Retrieved 9 November 2013. 
  10. ^ Ricardo García-Herrera, Pedro Ribera, Emiliano Hernández and Luis Gimeno (2003-09-26). "Typhoons in the Philippine Islands, 1566-1900". David V. Padua. p. 40. Retrieved 2010-04-13. 
  11. ^ Joint Typhoon Warning Center (2009). "Member Report Republic of the Philippines". Philippine Atmospheric, Geophysical and Astronomical Services Administration. World Meteorological Organization. Retrieved 2010-04-14. 
  12. ^ Joint Typhoon Warning Center (1959). "1958". United States Navy. 
  13. ^ Colleen A. Sexton (2006). Philippines in Pictures. Twenty-First Century Books. ISBN 978-0-8225-2677-3. Retrieved 2008-11-01. 
  14. ^ Edward B. Rodgers, Robert F. Adler, and Harold F. Pierce. "Satellite-measured rainfall across the Pacific Ocean and tropical cyclone contribution to the total". Retrieved 2008-11-25. 
  15. ^ Ten Worst Typhoons of the Philippines (A Summary)
  16. ^ Leoncio A. Amadore, PhD Socio-Economic Impacts of Extreme Climatic Events in the Philippines. Retrieved on 2007-02-25.
  17. ^ "TyphoonHaiyan - RW Updates". United Nations Office for the Coordination of Humanitarian Affairs. December 28, 2013. Philippines: Hundreds of corpses unburied after Philippine typhoon. Retrieved December 30, 2013. }
  18. ^ a b Pedro Ribera, Ricardo Garcia-Herrera and Luis Gimeno (July 2008). "Historical deadly typhoons in the Philippines". Weather (Royal Meteorological Society) 63 (7): 196. doi:10.1002/wea.275. 
  19. ^ Typhoon Haiyan death toll rises over 5,000 (Report). BBC. November 22, 2013. http://www.bbc.co.uk/news/world-asia-25051606. Retrieved November 22, 2013.
  20. ^ http://www.ndrrmc.gov.ph/attachments/article/835/29%20Update.pdf
  21. ^ a b "Situation report no.50 on Typhoon Ondoy (Ketsana) and Typhoon Pepeng (Parma)". Philippine National Disaster Coordinating Council. 2009-11-17. Retrieved 2010-05-14. 
  22. ^ As Typhoon Nesat departs, Philippines tallies the damage | MNN - Mother Nature Network
  23. ^
  24. ^ a b c "Destructive typhoons 1970-2003". National Disaster Coordinating Council. 2009-05-01. Archived from the original on 2004-10-28. Retrieved 2010-05-13. 
  25. ^ "Typhoon Juan Update". NDRRMC (formerly NDCC). 2010-10-23. Retrieved 2010-10-23. 
  26. ^ Leoncio A. Amadore, Ph.D. Socio-Economic Impacts of Extreme Climatic Events in the Philippines. Retrieved on 2007-02-25.
  27. ^ a b Padgett, Gary; Kevin Boyle; John Wallace; Huang Chunliang; Simon Clarke (2006-10-26). "Monthly Global Tropical Cyclone Summary June 2004". Australian Severe Weather Index. Jimmy Deguara. Retrieved 2007-01-13. 
  28. ^ Steve Lang (May 7, 2009). "Hurricane Season 2009: Kujira (Western Pacific Ocean)". NASA. Retrieved December 23, 2011. 
  29. ^ Narciso O. Itoralba (December 1981). Annual Tropical Cyclone Report 1977. Philippine Atmospheric, Geophysical and Astronomical Services Administration. p. 65. 
  30. ^ Joint Typhoon Warning Center. Typhoon Elaine. Retrieved on 2007-02-25.
  31. ^ "Annual Tropical Cyclone Report: Bess" (PDF). Joint Typhoon Warning Center. United States Navy. 1975. pp. 39–40. Retrieved May 2, 2013. 
  32. ^ "JTWC Annual tropical cyclone report: 2003". Joint Typhoon Warning Center. 2004. Retrieved 2010-01-22. 

External links[edit]