Tropical Storm Dujuan (2021)

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Saffir–Simpson scale
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
Disc Plain black.svg Tropical cyclone
Solid black.svg Subtropical cyclone
ArrowUp.svg Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

On February 16 at 06:00 UTC, the Japan Meteorological Agency (JMA) reported that a tropical depression had developed over the Philippine Sea. [1] Eight hours later, the JTWC issued a Tropical Cyclone Formation Alert (TCFA) on the system, while it was located roughly 15 miles (24 km) to the east of Babeldaob, Palau. The depression displayed convective banding features, wrapping into a disorganized low-level center of circulation. Within an area favorable for further development, with low to moderate vertical wind shear, strong poleward outflow, and 29–30 °C (84–86 °F) sea surface temperatures, the system began to intensify. [2] By 3:00 UTC on February 17, the depression had entered the Philippine Area of Responsibility (PAR), and was given the name Auring by the PAGASA. This made Dujuan the first named storm within the PAR in 2021. [3] Three hours later, the JTWC upgraded the system to a tropical depression, giving it the designation 01W. [4] As the system tracked to the west-northwest, it continued to strengthen until the early hours of February 18, when it was upgraded to a tropical storm by the JMA, JTWC, and the PAGASA, [4] [5] [6] with the JMA giving it the name Dujuan. [1]

At 03:00 UTC on February 19, the PAGASA briefly upgraded Dujuan into a severe tropical storm, before downgrading it back. [7] [8] The next day, vertical wind shear in Dujuan's environment had decreased, allowing the storm to slightly re-strengthen. [9] The vertical wind shear associated with the northeast monsoon still persisted, affecting the system, [10] and on February 21, the JMA downgraded Dujuan to a tropical depression. [1] The JTWC and the PAGASA followed on the next day as the system's low-level circulation center (LLCC) had weakened prior to landfall. [4] [11] The JMA and the JTWC issued their final advisories moments after. [12] [13] The storm made landfall over Batag Island in Laoang, Northern Samar at 09:00 PHT (01:00 UTC) on the same day. [14] Prior to crossing the Rapu-Rapu Islands in Albay, the PAGASA declared the storm as a low-pressure area and issued their final bulletin on the storm. [15] Dujuan dissipated on February 23 at 06:00 UTC. [1]

Preparations and impact

Overcast skies and rain puddles associated with Dujuan in Bocaue on February 21 9800Overcast in Bocaue, Bulacan 04.jpg
Overcast skies and rain puddles associated with Dujuan in Bocaue on February 21

Dujuan briefly moved over Palau on February 16 as a tropical depression, bringing heavy rainfall to parts of the country. [16] [17] On February 18, the boat of 15 Filipino fishermen capsized off the coast of Surigao, leaving the group adrift for six days until they were rescued by the Philippine Coast Guard. [18] [19]

In anticipation of the storm, the PAGASA issued Signal #1 warnings for the eastern section of Mindanao on February 19, with the same warnings issued on the eastern provinces of Visayas. [20] [21] [22] Signal 2 warnings were also issued in the majority of Eastern Samar, Samar, Southern Leyte, Dinagat Islands, and Surigao del Norte on February 21 as Dujuan re-intensified hours before landfall. [23] The warnings were quickly lowered, however, just a few hours after being issued. [24] Despite the lowered warnings, the storm was able to cause flooding in parts of Visayas. Before the storm's landfall, in Tandag City, Surigao del Sur, heavy rains had already caused houses to be submerged in floodwater. [25] Classes and government work was suspended on February 22 in Romblon, Tacloban City, and Negros Oriental and in parts of Leyte, Cebu, Davao de Oro, and Surigao del Sur. [26] [27]

A total of 280,881 individuals were affected in Northern Mindanao, Caraga, and in the Davao Region. At least 183,226 of the affected individuals were taken to 950 various evacuation shelters in each region. 2,408 houses were damaged, with 444 houses becoming totally damaged. Most of the damage occurred in the Caraga Administrative Region. [28] 42 domestic flights and multiple sea trips were also cancelled due to the harsh weather. [29] An analysis by the STAMINA4Space Program revealed that over 3,412 hectares of land had been inundated due to floods from Dujuan, with 92% (3,168 ha) of the land being cropland. The cropland only contained sparse vegetation at the time, however. [30] In the Philippines, one person was reported dead with four others reported missing. [31] Agricultural damages stood at

See also

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References

  1. 1 2 3 4 "RSMC Tropical Cyclone Best Track Name 2101 Dujuan (2101)". Japan Meteorological Agency . May 20, 2021. Archived from the original on May 28, 2021. Retrieved March 27, 2022– via the National Oceanic and Atmospheric Administration.
  2. ↑ "Tropical Cyclone Formation Alert (Invest 91W)". Joint Typhoon Warning Center. February 16, 2021. Archived from the original on February 16, 2021. Retrieved February 16, 2021.
  3. ↑ "Severe Weather Bulletin #1 for Tropical Depression 'Auring'" (PDF). PAGASA . 17 February 2021. Archived from the original (PDF) on 22 April 2021. Retrieved 17 February 2021. Alt URL
  4. 1 2 3 "bwp012021.dat". Joint Typhoon Warning Center . Retrieved March 27, 2022– via National Oceanic and Atmospheric Administration.
  5. ↑ Tropical Storm 01W (One) Warning No. 4 (Report). United States Joint Typhoon Warning Center. 18 February 2021. Archived from the original on 2021-02-18. Retrieved 18 February 2021. Alt URL
  6. ↑ "Severe Weather Bulletin #3 for Tropical Storm 'Auring'" (PDF). PAGASA . 18 February 2021. Archived from the original (PDF) on 22 April 2021. Retrieved 18 February 2021. Alt URL
  7. ↑ "Severe Weather Bulletin #6 for Severe Tropical Storm 'Auring' (Dujuan)" (PDF). PAGASA . 19 February 2021. Retrieved 19 February 2021.[ dead link ] Alt URL
  8. ↑ "Severe Weather Bulletin #7 for Tropical Storm 'Auring' (Dujuan)" (PDF). PAGASA . 19 February 2021. Archived from the original (PDF) on 22 April 2021. Retrieved 19 February 2021. Alt URL
  9. ↑ Prognostic Reasoning for Tropical Storm 01W (Dujuan) Warning No. 17 (Report). United States Joint Typhoon Warning Center. 21 February 2021. Archived from the original on 2021-02-18. Retrieved 21 February 2021. Alt URL
  10. ↑ "'Bagyong Auring' PAGASA weather update February 21, 2021". The Summit Express. February 21, 2021. Archived from the original on April 22, 2021. Retrieved April 8, 2021.
  11. ↑ "Severe Weather Bulletin #19 for Tropical Depression 'Auring' (Dujuan)" (PDF). PAGASA . 21 February 2021. Retrieved 21 February 2021.[ dead link ] Alt URL
  12. ↑ "Tropical Cyclone Information". Japan Meteorological Agency . February 22, 2021. Archived from the original on February 22, 2021. Retrieved February 22, 2021.
  13. ↑ Tropical Depression 01W (Dujuan) Warning No. 20 (Report). United States Joint Typhoon Warning Center. 22 February 2021. Retrieved 22 February 2021.[ dead link ] Alt URL
  14. ↑ "Severe Weather Bulletin #23 for Tropical Depression 'Auring' (Dujuan)" (PDF). PAGASA . 22 February 2021. Retrieved 22 February 2021.[ dead link ] Alt URL
  15. ↑ "Severe Weather Bulletin #24 for Low Pressure Area (formerly 'Auring') {Dujuan}" (PDF). PAGASA . 22 February 2021. Retrieved 22 February 2021.[ dead link ] Alt URL
  16. ↑ "WEATHER ROUNDUP FOR THE MARIANAS AND MICRONESIA". National Weather Service Tiyan GU. February 16, 2021. Archived from the original on February 16, 2021. Retrieved February 16, 2021.
  17. ↑ "Tropical Cyclone Formation Alert Graphic". Joint Typhoon Warning Center. February 16, 2021. Archived from the original on February 16, 2021. Retrieved February 16, 2021.
  18. ↑ Gubalani, Richelyn (February 26, 2021). "Fishing vessel rescues 15 Surigao fishers off Palau". Philippine News Agency. Archived from the original on February 27, 2021. Retrieved February 27, 2021.
  19. ↑ Ramos, Christia Marie (February 26, 2021). "15 fishers of boat that capsized during Auring's onslaught rescued". INQUIRER.net. Archived from the original on February 26, 2021. Retrieved February 27, 2021.
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  28. ↑ Rafanan, Marie Joyce G. (April 19, 2021). DSWD DROMIC Terminal Report on Severe Tropical Storm "AURING" (Report). Department of Social Welfare and Development Disaster Response Operations Monitoring and Information Center. Archived from the original on July 10, 2021. Retrieved July 10, 2021.
  29. ↑ "Sitrep No. 05 re Preparedness Measures and Effects of Severe Tropical Storm "AURING"" (PDF). National Disaster Risk Reduction and Management Council . February 22, 2021. Archived (PDF) from the original on February 23, 2021. Retrieved February 23, 2021.
  30. ↑ "STS Auring affects Surigao del Sur farmers, satellite images show". STAMINA4Space. February 26, 2021. Archived from the original on February 27, 2021. Retrieved February 27, 2021.
  31. ↑ "Auring leaves 1 dead, 2 missing in Caraga". CNN Philippines. February 23, 2021. Archived from the original on February 23, 2021. Retrieved February 23, 2021.
  32. ↑ "SitRep no.09 re Preparedness Measures and Effects for STS Auring" (PDF). NDRRMC. February 27, 2021. Archived (PDF) from the original on April 13, 2021. Retrieved February 27, 2021.
  33. ↑ "Global Catastrophe Recap February 2021" (PDF). AON. Archived (PDF) from the original on March 18, 2021. Retrieved March 12, 2021.
Tropical Storm Dujuan (Auring)
Dujuan 2021-02-19 0435Z.jpg
Dujuan at peak intensity over the Philippine Sea on February 19
Tropical cyclones of the 2021 Pacific typhoon season
2021 Pacific typhoon season summary.png
TD
TD
TS
Dujuan
TD
TD
VITY
Surigae
TD
Crising
TS
Choi-wan
TD
TD
TS
Koguma
TY
Champi
TD
TD
TD
Emong
TD
08W
VSTY
In-fa
TY
Cempaka
TD
TD
TS
Nepartak
TD
TD
TD
TD
TD
TD
TD
TD
TD
12W
TS
Lupit
STS
Mirinae
STS
Nida
TS
Omais
TD
17W
STS
Conson
VITY
Chanthu
TD
TD
VITY
Mindulle
TS
Dianmu
TD
TD
TS
Lionrock
STS
Kompasu
TD
Nando
STS
Namtheun
TY
Malou
TD
26W
VSTY
Nyatoh
VITY
Rai
TD
29W
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