Tropical Storm Rai (2016)

Tropical Storm Rai
Tropical Storm Rai over Vietnam on September 13
Meteorological history
FormedSeptember 11, 2016
DissipatedSeptember 13, 2016
Tropical storm
10-minute sustained (JMA)
Highest winds65 km/h (40 mph)
Lowest pressure996 hPa (mbar); 29.41 inHg
Tropical depression
1-minute sustained (SSHWS/JTWC)
Highest winds55 km/h (35 mph)
Lowest pressure1000 hPa (mbar); 29.53 inHg
Overall effects
Fatalities14 total
Damage$74 million
Areas affectedVietnam, Laos, Thailand, Cambodia
IBTrACS
Part of the 2016 Pacific typhoon season

Tropical Storm Rai was a weak and short-lived tropical cyclone which affected Indochina in September 2016. Formed from a tropical disturbance on September 11, the system developed into a tropical storm (on the JTWC scale) and reached its peak intensity on September 12, before making landfall in Vietnam and affecting Laos, Thailand and Cambodia. In Vietnam total damage reached US$73.96 million.

Meteorological history

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
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
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

During September 11, the Japan Meteorological Agency started to monitor a tropical depression, that had developed within an unfavourable environment for further development, about 860 km (535 mi) to the northeast of Ho Chi Minh City, Vietnam.[1][2] The system had a broad low level circulation centre, with unorganized deep convection located along the southern edge of the system.[2] During that day the system gradually developed further, before the Joint Typhoon Warning centre initiated advisories and classified it as Tropical depression 19W during the next day.

By the next day, the JTWC upgraded the system to a tropical depression with the given designation of 19W.[3] Satellite then showed that the LLCC of 19W was broad and defined with some deep convective banding.[4] However, its LLCC became exposed, though its deep convection remained in place.[5] Hours later, the JMA had declared that 19W had strengthened into a tropical storm, with the name Rai.[6] Although it has strengthened, the JTWC issued its final advisory without upgrading it to a tropical storm, whilst Rai made landfall over Central Vietnam, about 94 km (59 mi) southeast of the city of Da Nang.[7] According to the JMA, Rai reached its maximum intensity only as a weak tropical storm over land,[8] however they issued their last advisory and was downgraded into a tropical depression six hours later.[9] The JMA tracked the system until early on September 14 when it was near the 100th meridian east.[citation needed]

Preparations and impact

On late September 12, Tropical Storm Rai, known in Vietnam as Cơn bão số 4 (the 4th storm in 2016), made landfall in Quảng Nam Province and Quảng Ngãi Province in Central Vietnam.[10] The storm killed 14 people in Vietnam.[11][12] Heavy rains in Central Vietnam caused flooding and the bursting of the Bung River 2 hydroelectricity plant in Quảng Nam province of Vietnam, which released 28 million cubic meters of water and washed away 2 workers.[13] Damage from the bursting was ₫5 billion (US$224,000).[14] Four ships were sunk along central Vietnam's coastline and 2 others were left stranded, while 5 houses were completely destroyed and the roofs of 275 others were torn off.[15] Total damages caused by Rai amounted to ₫1,649 billion (US$73.96 million).[11]

On September 13, the Thai Meteorological Department issued a warning to people in 34 provinces in the North, Northeast and East to brace for heavy rain and stay tuned for weather updates, when Tropical Storm Rai moved through Laos and Thailand.[16][17]

See also

References

  1. ^ Tropical Storm Rai (RSMC Tropical Cyclone Best Track). October 24, 2016. Archived from the original on October 24, 2016. Retrieved October 30, 2016. {{cite report}}: Unknown parameter |agency= ignored (help)
  2. ^ a b "Significant Tropical Weather Advisory for the Western and South Pacific Oceans September 11, 2016 00z". United States Joint Typhoon Warning Center. September 11, 2016. Archived from the original on September 11, 2016.
  3. ^ "Tropical Depression 19W (Nineteen) Warning Nr 001". Joint Typhoon Warning Center. September 12, 2016. Archived from the original on September 12, 2016.
  4. ^ "Prognostic Reasoning for Tropical Depression 19W (Nineteen) Warning Nr 01". Joint Typhoon Warning Center. September 12, 2016. Archived from the original on September 12, 2016.
  5. ^ "Prognostic Reasoning for Tropical Depression 19W (Nineteen) Warning Nr 02". Joint Typhoon Warning Center. September 12, 2016. Archived from the original on September 12, 2016.
  6. ^ "TS 1615 RAI (1615) UPGRADED FROM TD". Japan Meteorological Agency. September 12, 2016. Archived from the original on September 13, 2016.
  7. ^ "Tropical Depression 19W (Rai) Warning Nr 004". Joint Typhoon Warning Center. September 12, 2016. Archived from the original on September 13, 2016.
  8. ^ "TS 1615 RAI (1615)". Japan Meteorological Agency. September 13, 2016. Archived from the original on September 13, 2016.
  9. ^ "TD DOWNGRADED FROM TS 1615 RAI (1615)". Japan Meteorological Agency. September 13, 2016. Archived from the original on September 13, 2016.
  10. ^ "Ngôi nhà phố phảng phất nét cổ xưa mộc mạc".
  11. ^ a b 2016 VIETNAM REPORT
  12. ^ "Bão số 4 khiến 12 người chết, 27 người bị thương".
  13. ^ "Dam burst sweeps 2 people away in Vietnam". World Bulletin. September 14, 2016. Retrieved 17 September 2016.
  14. ^ "Tích cực khắc phục thiệt hại do sự cố thủy điện Sông Bung 2". 17 September 2016.
  15. ^ "7 injured, 280 houses damaged as Storm Rai crosses central Vietnam". Tuổi Trẻ. September 14, 2016. Retrieved September 17, 2016.
  16. ^ "34 provinces on alert as storm Rai covers Thailand". Bangkok Post.
  17. ^ "National News Bureau Of Thailand | Tropical Storm Rai continues to bring heavy rain to Thailand". thainews.prd.go.th. Archived from the original on 2016-09-15.

External links

Wikimedia Commons has media related to Tropical Storm Rai (2016).
  • JMA General Information of Tropical Storm Rai (1615) from Digital Typhoon
  • JMA Best Track Data (Graphics) of Tropical Storm Rai (1615)
  • JMA Best Track Data (PDF) of Tropical Storm Rai (1615) (in Japanese)
  • 19W.RAI from the U.S. Naval Research Laboratory
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