Tropical Storm Merbok (2017)

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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 June 9 at 06:00 UTC, the Joint Typhoon Warning Center (JTWC) began monitoring an area of convection approximately 195 nautical miles (360 km; 225 mi) south of Manila, with the JTWC assessing its development potential within the next day as low. The system was in a marginal environment for development, with satellite imagery showing scattered convection around a poorly organized circulation. [1] By June 10, conditions began to improve and the system began to organize, with the JTWC upgrading its development potential within the next day to medium. [2] On the same day at 06:00 UTC, the Japan Meteorological Agency (JMA) began issuing advisories on a tropical depression. [3] At 15:00 UTC, the JTWC issued a Tropical Cyclone Formation Alert on the system as it was located approximately 185 nautical miles (345 km; 215 mi) west-northwest of Manila. At this time, the system was located within favorable conditions for further development, though its circulation still remained broad. [4] On June 11 at 03:00 UTC, the JTWC issued its first warning on Tropical Depression 04W as it continued to organize, with cloud tops in the central dense overcast deepening. [5]

Shortly after at 06:00 UTC, the JMA upgraded the depression to a tropical storm, giving it the name Merbok. [6] Advanced Scatterometer data from the MetOp-B satellite at 13:14 UTC showed tropical-storm-force winds in the eastern quadrants of the storm, and at 15:00 UTC, the JTWC also upgraded Merbok to a tropical storm. [7] Merbok continued tracking to the north-northwest influenced by a subtropical steering ridge, [8] and on June 12 at 12:00 UTC, the JMA upgraded Merbok to a severe tropical storm. [9] At the same time, Merbok peaked in intensity, with 10-min winds of 55 knots (100 km/h; 65 mph) and a minimum central pressure of 985 hPa (mbar; 29.09 inHg). [10] The JTWC estimated peak 1-min winds of 45 knots (85 km/h; 50 mph). [11] Merbok made landfall on the city of Shenzhen [12] at 14-15:00 UTC, [13] resulting in the JMA downgrading it to a tropical storm at 18:00 UTC [14] and the JTWC issuing its final advisory on Merbok at 21:00 UTC. [13] The JMA later issued its final advisory on the system on the next day at 00:00 UTC as it weakened into a tropical depression, [15] with its remnants dissipating inland at 12:00 UTC. [10]

Preparations and impact

Hong Kong

A Signal No. 1 warning was put in place for Hong Kong when Merbok first formed. This was upgraded to a Signal No. 8 warning by the time the storm made landfall.

10 people were injured in Hong Kong due to Merbok. During the storm's passage there were 600 reports of fallen trees, 20 reports of flooding, and 2 reports of landslides. An aluminum window fell off a building in To Kwa Wan, damaging two cars beneath it. Numerous roads were flooded causing major traffic issues on the morning of June 13. A retaining wall along Tai Tam Road in Stanley collapsed due to the heavy rainfall produced by Merbok. Over 500 flights at the Hong Kong International Airport were affected by the storm. [16]

China

A blue alert was issued as Merbok approached China on June 12. [17]

Across Guangdong Province, 32 homes were destroyed, 122,000 people reported property damage, 13,000 hectares of crops flooded, and roughly 155,000 households lost electricity. Total economic losses in South China were counted to be CN¥600 million (US$88.3 million). [18] [19] [20]

See also

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References

  1. ↑ "ABPW10 PGTW 090600". tgftp.nws.noaa.gov. June 9, 2017. Archived from the original on 2024-05-23. Retrieved 2021-04-04.
  2. ↑ "ABPW10 PGTW 100100". tgftp.nws.noaa.gov. June 10, 2017. Archived from the original on 2024-05-23. Retrieved 2021-04-04.
  3. ↑ "WWJP25 RJTD 100600". tgftp.nws.noaa.gov. June 10, 2017. Archived from the original on 2024-05-23. Retrieved 2021-04-04.
  4. ↑ "Tropical Cyclone Formation Alert". tgftp.nws.noaa.gov. June 10, 2017. Archived from the original on 2024-05-23. Retrieved 2021-04-04.
  5. ↑ "Prognostic Reasoning for Tropical Depression 04W (Four) Warning NR 01". tgftp.nws.noaa.gov. June 11, 2017. Archived from the original on 2024-05-23. Retrieved 2021-04-04.
  6. ↑ "RSMC Tropical Cyclone Advisory". tgftp.nws.noaa.gov. June 11, 2017. Archived from the original on 2024-05-22. Retrieved 2021-04-05.
  7. ↑ "Prognostic Reasoning for Tropical Storm 04W (Merbok) Warning NR 03". tgftp.nws.noaa.gov. June 11, 2017. Archived from the original on 2024-05-23. Retrieved 2021-04-05.
  8. ↑ "Prognostic Reasoning for Tropical Storm 04W (Merbok) Warning NR 06". tgftp.nws.noaa.gov. June 12, 2017. Archived from the original on 2024-05-23. Retrieved 2021-04-06.
  9. ↑ "RSMC Tropical Cyclone Advisory". tgftp.nws.noaa.gov. June 12, 2017. Archived from the original on 2024-05-22. Retrieved 2021-04-06.
  10. 1 2 Annual Report on the Activities of the RSMC Tokyo - Typhoon Center (PDF) (Report). Japan Meteorological Agency. 2018. p. 79. Retrieved 2021-04-06.
  11. ↑ "Western North Pacific Ocean Best Track Data". www.metoc.navy.mil. Retrieved 2021-04-06.
  12. ↑ English, Ians (June 13, 2017). "Typhoon Merbok makes landfall in China, 100,000 evacuated". Oneindia . Retrieved 2021-04-06.
  13. 1 2 "Tropical Storm 04W (Merbok) Warning NR 008". tgftp.nws.noaa.gov. June 12, 2017. Archived from the original on 2024-05-22. Retrieved 2021-04-06.
  14. ↑ "RSMC Tropical Cyclone Advisory". tgftp.nws.noaa.gov. June 12, 2017. Archived from the original on 2024-05-22. Retrieved 2021-04-06.
  15. ↑ "RSMC Tropical Cyclone Advisory". tgftp.nws.noaa.gov. June 13, 2017. Archived from the original on 2024-05-22. Retrieved 2021-04-06.
  16. ↑ "Severe Tropical Storm Merbok (1702) 11 to 13 June 2017". Hong Kong Observatory. Retrieved December 1, 2020.
  17. ↑ "Hong Kong and south China brace for Typhoon Merbok". fr.reuters.com. Reuters. June 12, 2017. Retrieved December 1, 2020.[ dead link ]
  18. ↑ China Meteorological Agency (November 26, 2017). Member Report: China (PDF). ESCAP/WMO Typhoon Committee: 12th Integrated Workshop. ESCAP/WMO Typhoon Committee. p. 16. Archived (PDF) from the original on December 3, 2013. Retrieved November 26, 2017.
  19. ↑ ""苗柏""卷走"2.6亿元" (in Chinese). Retrieved December 1, 2020.
  20. ↑ Song, Angel. "Typhoon Merbok Caused ¥260 Million in Damage in Guangdong". That's Online. Retrieved 1 December 2020.
Severe Tropical Storm Merbok
Merbok 2017-06-12 0508Z.jpg
Severe Tropical Storm Merbok nearing landfall in China on June 12
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