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Typhoons in the Philippines

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Title: Typhoons in the Philippines  
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Typhoons in the Philippines

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; the cyclones have even affected settlement patterns in the northern islands: for example, the eastern coast of Luzon is very sparsely populated.

Etymology and naming conventions

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

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 [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". In December of 2014 Typhoon Hagupit weakens over Philippines. [10]

Variability in activity

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.[11] 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).[12] There was only one tropical cyclone which moved through the Philippines in 1958.[13] The most frequently impacted areas of the Philippines by tropical cyclones are northern Luzon and eastern Visayas.[14] 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.[15]

Public Storm Warning Signals

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:

  • PSWS #1 - Tropical cyclone winds of 30 km/h (19 mph) to 60 km/h (37 mph) are expected within the next 36 hours. (Note: If a tropical cyclone forms very close to the area, then a shorter lead time is seen on the warning bulletin.)
  • PSWS #2 - Tropical cyclone winds of 60 km/h (37 mph) to 100 km/h (62 mph) are expected within the next 24 hours.
  • PSWS #3 - Tropical cyclone winds of 100 km/h (62 mph) to 185 km/h (115 mph) are expected within the next 18 hours.
  • PSWS #4 - Tropical cyclone winds of greater than 185 km/h (115 mph) are expected within 12 hours.

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

Haiyan/Yolanda at peak strength
Rank[16] Storm Dates of impact Deaths
1 September 1881 typhoon 1881, September 27 20,000
Thelma/Uring 1991 1991, November 4–7 5,101[17]
2 Haiyan/Yolanda 2013 2013, November 7–8 6,241[18]
4 Bopha/Pablo 2012 2012, December 2–9 1,901
5 Angela Typhoon 1867, September 22 1,800[19]
6 Winnie 2004 2004, November 27–30 1,593
7 October 1897 Typhoon 1897, October 7 1,500[19]
8 Ike/Nitang 1984 1984, September 3–6 1,492
9 Fengshen/Frank 2008 2008, June 20–23 1,410
10 Durian/Reming 2006 2006, November 29-December 1 1,399

Most destructive

Animated enhanced infrared satellite loop of Typhoon Haiyan from peak intensity to landfall in the Philippines
Costliest Philippine typhoons
Rank Names Dates of impact PHP USD Ref
1 Haiyan, (Yolanda) November 3 – 11, 2013 89.6 billion 2.86 billion [20]
2 Bopha, (Pablo) November 25 – December 9, 2012 42.2 billion 1.04 billion [21]
3 Parma, (Pepeng) October 2 – 10, 2009 27.3 billion 608 million [22]
4 Nesat, (Pedring) September 26 – 28, 2011 15 billion 333 million [23]
5 Fengshen, (Frank) June 20 – 23, 2008 13.5 billion 301 million [24]
6 Ketsana, (Ondoy) September 25 – 27, 2009 11 billion 244 million [22]
7 Mike, (Ruping) November 10 – 14, 1990 10.8 billion 241 million [25]
8 Angela, (Rosing) October 30 – November 4, 1995 10.8 billion 241 million [25]
9 Flo, (Kadiang) October 2 – 6, 1993 8.75 billion 195 million [25]
10 Megi (Juan) October 18 – 21, 2010 8.32 billion 193 million [26]

Wettest recorded tropical cyclones

Wettest tropical cyclonein the Philippine islands
Highest known totals
Precipitation Storm Location Ref
Rank mm in
1 2210.0 87.01 July 1911 cyclone Baguio City [6]
2 1216.0 47.86 Carla 1967 Baguio City [6]
3 1085.8 42.45 Utor/Feria 2001 Baguio City [27]
4 1012.7 39.87 Mindulle/Igme 2004 [28]
5 994.6 39.16 Zeb/Iliang 1998 Baguio City [28]
6 902.0 35.51 Kujira/Dante 2009 [29]
7 869.6 34.24 Dinah/Openg 1977 Western Luzon [30]
8 817.9 32.20 Elaine 1974 Baguio City [31]
9 782.3 30.80 Bess/Susang 1974 Baguio City [32]
10 723.0 29.46 Linfa/Chedeng 2003 Tondoligan Park, Dagupan, Pangasinan [33]

See also


  1. ^ a b Glossary of Meteorology. Baguio. Retrieved on 2008-06-11.
  2. ^  
  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). Session"st"Member Report to the ESCAP/WMO Typhoon Committee, 41. 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.  
  7. ^ English, Fr. Leo James (2004, 19th printing), Tagalog-English Dictionary, Manila: Congregation of the Most Holy Redeemer, p. 117,  
  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,  
  9. ^ a b c d "Names". David Michael V. Padua. Retrieved 9 November 2013. 
  10. ^
  11. ^ 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. 
  12. ^  
  13. ^  
  14. ^ Colleen A. Sexton (2006). Philippines in Pictures. Twenty-First Century Books.  
  15. ^ 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. 
  16. ^ Ten Worst Typhoons of the Philippines (A Summary)
  17. ^ Leoncio A. Amadore, PhD Socio-Economic Impacts of Extreme Climatic Events in the Philippines. Retrieved on 2007-02-25.
  18. ^ "TyphoonHaiyan - RW Updates".  }
  19. ^ a b Pedro Ribera, Ricardo Garcia-Herrera and Luis Gimeno (July 2008). "Historical deadly typhoons in the Philippines". Weather ( 
  20. ^ Typhoon Haiyan death toll rises over 5,000 (Report). BBC. November 22, 2013. Retrieved November 22, 2013.
  21. ^
  22. ^ 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. 
  23. ^ As Typhoon Nesat departs, Philippines tallies the damage | MNN - Mother Nature Network
  24. ^
  25. ^ 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. 
  26. ^ "Typhoon Juan Update". NDRRMC (formerly NDCC). 2010-10-23. Retrieved 2010-10-23. 
  27. ^ Leoncio A. Amadore, Ph.D. Socio-Economic Impacts of Extreme Climatic Events in the Philippines. Retrieved on 2007-02-25.
  28. ^ 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. 
  29. ^ Steve Lang (May 7, 2009). "Hurricane Season 2009: Kujira (Western Pacific Ocean)". NASA. Retrieved December 23, 2011. 
  30. ^ Narciso O. Itoralba (December 1981). Annual Tropical Cyclone Report 1977. Philippine Atmospheric, Geophysical and Astronomical Services Administration. p. 65. 
  31. ^ Joint Typhoon Warning Center. Typhoon Elaine. Retrieved on 2007-02-25.
  32. ^ "Annual Tropical Cyclone Report: Bess" ( 
  33. ^ "JTWC Annual tropical cyclone report: 2003". Joint Typhoon Warning Center. 2004. Retrieved 2010-01-22. 

External links

  • Philippine Tropical Cyclone Update(Broken Link)
  • Typhoon2000
  • Monthly typhoon tracks: 1951-2010
  • Typhoon Haiyan coverage by CBSnews
  • CRS International relief organization quickly mobilizes to help Philippine Typhoon victims
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