Tropical Storm Hagibis was a tropical storm that, along with the

southwest monsoon A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with annual latitudinal oscil ...

, brought heavy rainfall to the

Philippines The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...

for nearly a week in June 2014. The storm formed on June 13 and dissipated on June 18. Hagibis made landfall on June 15, causing damage estimated to be US$198 million. Hagibis is a Filipino word, meaning fast or swiftness.

Meteorological history

On June 11, 2014, a broad, poorly-defined

area of low pressure In meteorology, a low-pressure area (LPA), low area or low is a region where the atmospheric pressure is lower than that of surrounding locations. It is the opposite of a high-pressure area. Low-pressure areas are commonly associated with inclem ...

formed over the

South China Sea The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by South China, in the west by the Indochinese Peninsula, in the east by the islands of Taiwan island, Taiwan and northwestern Philippines (mainly Luz ...

. Extensive, though disorganized, deep

convection Convection is single or Multiphase flow, multiphase fluid flow that occurs Spontaneous process, spontaneously through the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoy ...

accompanied the system. Situated within a region of low to moderate

wind shear Wind shear (; also written windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical ...

and weak

outflow Outflow may refer to: *Capital outflow, the capital leaving a particular economy *Bipolar outflow, in astronomy, two continuous flows of gas from the poles of a star * Outflow (hydrology), the discharge of a lake or other reservoir system *Outflow ...

, slow development ensued. By June 13, the

Japan Meteorological Agency The Japan Meteorological Agency (JMA; ''気象庁, Kishō-chō'') is a division of the Ministry of Land, Infrastructure, Transport and Tourism dedicated to the Scientific, scientific observation and research of natural phenomena. Headquartered ...

(JMA) classified the disturbance as a tropical depression. A

monsoon A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in Atmosphere of Earth, atmospheric circulation and precipitation associated with annu ...

al system, the depression featured an extensive circulation with the strongest winds well away from the center, contrary to most

tropical cyclone A tropical cyclone is a rapidly rotating storm system with a low-pressure area, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depending on its locat ...

s. A

scatterometer A scatterometer or diffusionmeter is a scientific instrument to measure the return of a beam of light or radar waves scattered by diffusion in a medium such as air. Diffusionmeters using visible light are found in airports or along roads to measur ...

pass revealed winds up to 65 km/h (40 mph) within a banding feature to the east of the storm's center by the evening of June 13. In accordance with this, the JMA upgraded the depression to ''Tropical Storm 1407'' and assigned the name ''Hagibis'' to the cyclone. Despite the presence of gale-force winds, the

Joint Typhoon Warning Center The Joint Typhoon Warning Center (JTWC) is a joint United States Navy – United States Air Force command in Pearl Harbor, Hawaii. The JTWC is responsible for the issuing of tropical cyclone warnings in the North-West Pacific Ocean, South P ...

(JTWC) deemed the system to be below storm intensity and only issued a

Tropical Cyclone Formation Alert A Tropical Cyclone Formation Alert (TCFA) is a bulletin released by the U.S. Navy-operated Joint Typhoon Warning Center in Honolulu, Hawaii or the Fleet Weather Center in Norfolk, Virginia, warning of the possibility of a tropical cyclone formi ...

early on June 14, indicating that it was likely to become a tropical cyclone within 24 hours. Thereafter, the tropical storm-force winds contracted to within 130 km (80 mi) of the center, indicative of a more tropical than monsoonal system. As such, the JTWC initiated advisories on the system as Tropical Storm ''07W''. Early on June 15, Hagibis made landfall over southern China, and it subsequently weakened to a tropical depression. On the morning of June 16, both agencies issued their final warnings on Hagibis as it weakened further to a land depression. Its remnants still continued to move northward, but by June 17, the remnants of Hagibis curved eastwards due to the

jet stream Jet streams are fast flowing, narrow thermal wind, air currents in the Earth's Atmosphere of Earth, atmosphere. The main jet streams are located near the altitude of the tropopause and are westerly winds, flowing west to east around the gl ...

. Later that day, the remnants entered moved back over warm waters, and accompanied by low vertical wind shear, and the storm re-intensified. The JMA upgraded Hagibis to a tropical storm once again, and both the JTWC and the JMA re-initiated advisories on the system. Early on June 18, Hagibis transitioned into an extratropical cyclone, and its circulation was absorbed by a developing extratropical storm to the north on June 21. The system moved out of the basin early on June 23.

Impacts

Philippines

Although Hagibis did not enter the Philippine Area of Responsibility (PAR), it did threaten the

by enhancing the

, bringing torrential rainfall to the country. Due to extreme rainfall since Tropical Storm Mitag on June 10, the Philippine Atmospheric Geophysical and Astronomical Services Administration (PAGASA) declared the official start of the rainy season. It was reported that 17 towns in

Maguindanao Maguindanao (; Maguindanaon: ''Dairat nu Magindanaw''; Iranun: ''Perobinsia a Magindanao''; ) was a province of the Philippines located in the Bangsamoro Autonomous Region in Muslim Mindanao (BARMM). From 2014 to 2022, its provincial capital ...

province were flooded. As a result, a total of more than 90,000 people were affected. Extreme rainfall continued to affect the country until June 27, when a tropical disturbance affecting northern

Luzon Luzon ( , ) is the largest and most populous List of islands in the Philippines, island in the Philippines. Located in the northern portion of the List of islands of the Philippines, Philippine archipelago, it is the economic and political ce ...

ceased.

China

Hagibis made landfall over southern China at 04:50 UTC on June 15. Torrential rain continued to bring flooding until June 22, as the southwest monsoon weakened. No people were killed, and total economic losses in Mainland China were counted to be CNY 1.23 billion (US$198 million).

Meteorological history

Impacts

Philippines

China

See also

References

External links