Typhoon Nida (2009)

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

Tropical cyclone

Subtropical cyclone

Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

Early on November 21 the Joint Typhoon Warning Center (JTWC) reported that an area of convection had persisted within a monsoon trough about 880 km (550 mi) to the southeast of Guam island. ^{[1] [2]} At this time the system was moving around the subtropical ridge of pressure, with an anticyclone over the cyclone helping the convection to consolidate over a broad and elongated low level circulation center which was located in an area of minimal vertical wind shear. ^{[1] [2]} Later that morning a Tropical Cyclone Formation Alert was released as deep convection increased in organization with multiple bands of convection starting to wrap into the developing low level circulation center. The system was then declared as a tropical depression by the JMA later that day before the JTWC followed suit early the next day, who assigned the designation of 26W to the depression. ^{[3] [4]} During November 22, the depression remained weak, before during the next day both the JMA and the JTWC upgraded the depression to a tropical storm, with the JMA assigning the international number of 0922 and name of Nida as it started to move along a subtropical ridge. ^{[5] [6] [7]} Later on November 23, microwave imagery showed that an eye had developed within a well defined low level circulation center. ^[8] Early the next day, the JTWC reported that Nida had intensified into a category 1 typhoon as the eye became well defined with deep convection wrapping around most of the eye. ^{[9] [10]} However, despite the JTWC reporting 1-minute sustained wind speeds of 160 km/h (99 mph), the JMA only reported 10-minute sustained wind speeds of 110 km/h (68 mph) which made Nida a Severe Tropical Storm. ^{[11] [12]} Early on November 25 the JMA reported that Nida had intensified into a typhoon before reporting later that day that the typhoon had rapidly intensified under favourable conditions and reached its peak 10-minute wind speeds of 195 km/h (121 mph), with a peak pressure of 905 hPa. ^{[13] [14]} During the next day the JTWC also reported that Typhoon Nida had rapidly intensified over the previous 18 hours into a category five super typhoon with winds of 285 km/h (177 mph), as it maintained a well defined symmetrical structure. The JTWC then reported that Nida had intensified a little bit more and reached its peak 1-minute sustained wind speeds of 290 km/h (180 mph). ^[11] The typhoon later weakened to a category four, before re-strengthening to a category five on November 27, remaining quasi-stationary for more than two days. It weakened to a tropical depression on December 2 due to stronger vertical wind shear associated by the Northeast monsoon, and the storm dissipated on December 4. ^[11]

Preparations and Impact

Early on November 24, the National Weather Service Weather Forecast Office in Tiyan, Guam (NWS Guam) placed the island of Faraulep under a tropical storm warning, before later that morning issuing tropical storm watches for Fais and Ulithi. ^{[15] [16]} As Nida was upgraded to a typhoon by the JTWC, the NWS upgraded the tropical storm warning for Faraulep to a typhoon warning. ^[17] Later that day they reported that the typhoon warning for Faraulep had been cancelled as Nida was moving to the northwest away from Faraulep before early the next day the tropical storm warning for Fais and Ulithi were cancelled. ^[18] As the storm entered the Philippine Area of Responsibility, PAGASA issued a warning to the shipping industry, warning of strong to gale force winds. ^[19] The typhoon was the most intense tropical cyclone of 2009. ^[20]

See also

• Weather of 2009
• Tropical cyclones in 2009
• List of storms named Nida
• List of storms named Vinta

References

1. "Significant tropical weather advisory for the Western and South Pacific Ocean 2009-11-21 06z". Joint Typhoon Warning Center (FTP). November 21, 2009. Retrieved November 22, 2009.^{[dead ftp link]}(To view documents see Help:FTP)
2. "Tropical Cyclone Formation Alert 2009-11-21 1100z". Joint Typhoon Warning Center (FTP). November 21, 2009. Retrieved November 22, 2009.^{[dead ftp link]}(To view documents see Help:FTP)
3. "JMA WWJP25 Advisory 2009-11-21 18z". Japan Meteorological Agency (FTP). November 21, 2009. Retrieved November 22, 2009.^{[dead ftp link]}(To view documents see Help:FTP)
4. "Prognostic reasoning for Tropical Depression 26W". Joint Typhoon Warning Center (FTP). November 22, 2009. Retrieved November 22, 2009.^{[dead ftp link]}(To view documents see Help:FTP)
5. "JTWC Tropical Cyclone Advisory 2009-11-23 09z". Joint Typhoon Warning Center (FTP). November 23, 2009. Retrieved November 28, 2009.^{[dead ftp link]}(To view documents see Help:FTP)
6. "JMA Tropical Cyclone Advisory 2009-11-23 12z". Japan Meteorological Agency. November 23, 2009. Archived from the original on May 23, 2024. Retrieved November 28, 2009.
7. "Prognostic reasoning for Tropical Storm 26W (Nida)". Joint Typhoon Warning Center (FTP). November 23, 2009. Retrieved November 23, 2009.^{[dead ftp link]}(To view documents see Help:FTP)
8. "JTWC Tropical Cyclone Warning 2009-11-23 21z". Joint Typhoon Warning Center (FTP). November 23, 2009. Retrieved November 29, 2009.^{[dead ftp link]}(To view documents see Help:FTP)
9. "JTWC Tropical Cyclone Advisory 2009-11-24 09z". Joint Typhoon Warning Center (FTP). November 24, 2009. Retrieved November 29, 2009.^{[dead ftp link]}(To view documents see Help:FTP)
10. "Prognastic Reasoning for Typhoon 26W (Nida) 2009-11-24 15z". Joint Typhoon Warning Center (FTP). November 24, 2009. Retrieved November 29, 2009.^{[dead ftp link]}(To view documents see Help:FTP)
11. "Super Typhoon 26W (Nida) JTWC Running Best Track". Joint Typhoon Warning Center . United States Naval Research Laboratory. November 20, 2009. Retrieved November 29, 2009.
12. "JMA Tropical Cyclone Advisory 2009-11-24 21z". Japan Meteorological Agency. November 24, 2009. Archived from the original on May 23, 2024. Retrieved November 29, 2009.
13. "JMA Tropical Cyclone Advisory 2009-11-25 00z". Japan Meteorological Agency. November 25, 2009. Archived from the original on May 23, 2024. Retrieved November 29, 2009.
14. "JMA Tropical Cyclone Advisory 2009-11-25 12z". Japan Meteorological Agency. November 25, 2009. Archived from the original on May 23, 2024. Retrieved November 29, 2009.
15. Dan Mundell (November 24, 2009). "Tropical Storm 26W (Nida) Special Advisory Number Eight A". National Weather Service in Tiyan, Guam. Archived from the original on May 23, 2024. Retrieved November 24, 2009.
16. Dan Mundell (November 24, 2009). "Tropical Storm 26W (Nida) Advisory Number Nine". National Weather Service in Tiyan, Guam. Archived from the original on August 28, 2009. Retrieved November 24, 2009.
17. Paul Stanko and Clint Simpson (November 24, 2009). "Tropical Storm 26W (Nida) Special Advisory Number Ten A". National Weather Service in Tiyan, Guam. Archived from the original on May 23, 2024. Retrieved November 24, 2009.
18. Dan Mundell (November 25, 2009). "Tropical Storm 26W (Nida) Advisory Number Thirteen". National Weather Service in Tiyan, Guam. Archived from the original on August 28, 2009. Retrieved November 25, 2009.
19. "Philippines: 'Vinta' enters Philippines, to weaken in 24 hoursü [sic]". Asia News Monitor. Thai News Service Group. Philippine News Agency. 4 December 2009. OCLC   767732004. ProQuest   1239382991.
20. "World's Worst Weather". Jackson Citizen Patriot . 28 November 2009. p. 16. Retrieved 4 October 2025– via Newspapers.com.

Typhoon Nida (Vinta)

Typhoon Nida at peak intensity on November 25

v t e Tropical cyclones of the 2009 Pacific typhoon season
	TD Auring TD Bising TD Crising VSTY Kujira TD TD TY Chan-hom STS Linfa TS Nangka TS Soudelor TD Huaning TY Molave TS Goni TY Morakot TS Etau TD Maka VSTY Vamco TD TD TD TD STS Krovanh TD 02C STS Dujuan TD TD TS Mujigae TY Koppu VITY Choi-wan TD TD TY Ketsana TD 18W VSTY Parma VITY Melor TS Nepartak VSTY Lupit TD TD TY Mirinae TD Tino TD 25W TD Urduja VITY Nida TD TD TD 28W TD TD
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