Tropical Storm Danas, known in 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 ...

as Tropical Storm Falcon, was a tropical cyclone that caused minimal damages throughout its path originating as a low-pressure area near the

Mariana Islands The Mariana Islands ( ; ), also simply the Marianas, are a crescent-shaped archipelago comprising the summits of fifteen longitudinally oriented, mostly dormant volcanic mountains in the northwestern Pacific Ocean, between the 12th and 21st pa ...

. It is the fifth named

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 ...

and the sixth named storm by the

PAGASA The Philippine Atmospheric, Geophysical and Astronomical Services Administration (, abbreviated as PAGASA , which means "hope" as in the Tagalog language, Tagalog word ''pag-asa'') is the National Meteorological and Hydrological Services (NMHS ...

of the

2019 Pacific typhoon season The 2019 Pacific typhoon season was a devastating season that became the costliest on record, just ahead of the previous year and 2023, mainly due to the catastrophic damage wrought by typhoons Lekima, Faxai, and Hagibis. The season was the ...

Meteorological history

On July 11, a low-pressure zone formed near the

, and the

United States Naval Research Laboratory The United States Naval Research Laboratory (NRL) is the corporate research laboratory for the United States Navy and the United States Marine Corps. Located in Washington, DC, it was founded in 1923 and conducts basic scientific research, appl ...

began tracking the system. On the morning of July 14, 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) upgraded it to a tropical depression. At this point the system moved westward. At 8 pm, the Joint Typhoon Warning Center gave the system a low chance for

tropical cyclogenesis Tropical cyclogenesis is the development and strengthening of a tropical cyclone in the atmosphere. The mechanisms through which tropics, tropical cyclogenesis occur are distinctly different from those through which temperate cyclogenesis occu ...

. On the morning of July 15, the JMA issued a gale warning, and the

Central Weather Bureau The Central Weather Administration (CWA; ) is the government meteorological research and forecasting institution of Taiwan (the Republic of China). In addition to meteorology, the Central Weather Administration also makes astronomical observation ...

(CWB) of

Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia. The main geography of Taiwan, island of Taiwan, also known as ''Formosa'', lies between the East China Sea, East and South China Seas in the northwestern Pacific Ocea ...

upgraded it to a tropical depression. On the same day, the

Hong Kong Observatory The Hong Kong Observatory is a weather forecast agency of the government of Hong Kong. The Observatory forecasts the weather and issues warnings on weather-related hazards. It also monitors and makes assessments on radiation levels in Hong ...

upgraded the storm to a tropical depression. At 6:30 am on July 16, the Joint Typhoon Warning Center upgraded the rating to "High" and issued a tropical cyclone warning. The Joint Typhoon Warning Center raised the system to a tropical depression at 2:40 pm, giving the number 06W. At 3 pm on the same day, the Japan Meteorological Agency upgraded it to a tropical storm, naming it ''Danas'', followed by the China Meteorological Center, the CWB, and

also upgraded it to a tropical storm. The Joint Typhoon Warning Center was upgraded to a tropical storm late that night. On July 19, the JMA reported that Danas had reached its peak wind speeds with maximum 10-minute

sustained wind The maximum sustained wind associated with a tropical cyclone is a common indicator of the intensity of the storm. Within a mature tropical cyclone, it is found within the eyewall at a certain distance from the center, known as the radius of maxi ...

s of 85 km/h (50 mph). Later that day, Danas began to weaken. On July 20, around 13:00 UTC, Danas made landfall in

South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia. It constitutes the southern half of the Korea, Korean Peninsula and borders North Korea along the Korean Demilitarized Zone, with the Yellow Sea to the west and t ...

as a minimal tropical storm, before weakening into a tropical depression soon afterward. The weakening trend also accelerated on July 20 due to the drop in

sea surface temperature Sea surface temperature (or ocean surface temperature) is the ocean temperature, temperature of ocean water close to the surface. The exact meaning of ''surface'' varies in the literature and in practice. It is usually between and below the sea ...

s to near landfall. The Republic of Korea Meteorological Administration downgraded Danas to a tropical depression at 11 am and stopped issuing announcements. At 12:45 UTC on July 21, Danas transitioned into an extratropical low in the

Sea of Japan The Sea of Japan is the marginal sea between the Japanese archipelago, Sakhalin, the Korean Peninsula, and the mainland of the Russian Far East. The Japanese archipelago separates the sea from the Pacific Ocean. Like the Mediterranean Sea, it ...

, and the JMA issued their final advisory on the storm.

Impact

Philippines

In the Philippines, four people were killed after Danas triggered flooding in the country. Agricultural damage in

Negros Occidental Negros Occidental (; ), officially the Province of Negros Occidental (; ), is a Provinces of the Philippines, province in the Philippines located in the Negros, Negros Island. Its capital is the city of Bacolod, of which it is geographically s ...

were calculated at

₱ The Philippine peso sign (₱) is the currency symbol used for the Philippine peso, the official currency of the Philippines. The symbol resembles a Latin script, Latin letter P with two horizontal strokes. It differs from the currency symbol u ...

19 million (US$372,000), while agricultural damage in Lanao Norte reached

277.8 million (US$5.44 million).

South Korea

Danas caused stormy weather across South Korea; however, its effects were relatively minor. Heavy rains amounted to in Geomun-do. A man died after being swept away by strong waves in

Geochang County Geochang County (''Geochang-gun,'' ) is a county in South Gyeongsang Province, South Korea. The Geochang International Festival of Theater, which was started in 1989, is renowned as the best play festival in Korea. The District Office is lo ...

. Damage in

South Jeolla Province South Jeolla Province (), formerly South Chŏlla Province, also known as Jeonnam (), is a province in the Honam, Honam region, South Korea, and the Provinces of Korea, southernmost province in mainland Korea. South Jeolla borders the provinces of ...

were at W395 million (US$336,000), while damage in

Jeju Island Jeju Island (Jeju language, Jeju/) is South Korea's largest island, covering an area of , which is 1.83% of the total area of the country. Alongside outlying islands, it is part of Jeju Province and makes up the majority of the province. The i ...

up to W322 million (US$274,000). Additionally, Danas also triggered flash flooding in Kyushu. An 11-year-old boy was killed.

Japan

Danas brought heavy rainfall to many western parts of Japan including nearly all of

Kyushu is the third-largest island of Japan's Japanese archipelago, four main islands and the most southerly of the four largest islands (i.e. excluding Okinawa Island, Okinawa and the other Ryukyu Islands, Ryukyu (''Nansei'') Ryukyu Islands, Islands ...

. In addition, the amount of rain that fell in the last 24 hours exceeded 350 mm in various places in Goto, and reaches the rainfall for July 1 month in normal years, and it has become the largest since July.

References

{{2019 Pacific typhoon season buttons