Typhoon Nida (2009)
Encyclopedia
Typhoon Nida was the strongest storm of the 2009 Pacific typhoon season
and the most intense storm of 2009. Forming from a monsoon trough, it developed into a depression southeast of Guam
on November 21, and lasted two weeks.
(JTWC) reported that an area of convection had persisted within a monsoon trough about 880 km, (545 mi) to the southeast of Guam
. 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. 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. 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.
Later on November 23, microwave imagery showed that an eye had developed within a well defined low level circulation center. 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. However despite the JTWC reporting 1-minute sustained wind speeds of 160 km/h, (100 mph), the JMA only reported 10-minute sustained wind speeds of 110 km/h, (70 mph) which made Nida a Severe Tropical Storm. Early on November 25 the JMA reported that Nida had intensifed into a typhoon before reporting later that day that the typhoon had rapidly intensifed under favourable conditions and reached its peak 10-minute wind speeds of 195 km/h (120 mph), with a peak pressure of 905 hPa. 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 (180 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 (185 mph).
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. The storm dissipated on December 4.
Weather Forecast Office in Tiyan, Guam
(NWS Guam) placed the island of Faraulep
, before later that morning issuing tropical storm watches for Fais
and Ulithi
. As Nida was upgraded to a typhoon by the JTWC, the NWS upgraded the tropical storm warning for Faraulep to a typhoon warning. 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.
during 2009, surpassing Hurricane Rick
by 1 hPa.
2009 Pacific typhoon season
The 2009 Pacific typhoon season was the period that tropical cyclones formed in the Western Pacific Ocean. The season ran throughout the year during 2009, with most tropical cyclones forming between May and November. The scope of this article is limited to the Pacific Ocean, north of the equator...
and the most intense storm of 2009. Forming from a monsoon trough, it developed into a depression southeast of Guam
Guam
Guam is an organized, unincorporated territory of the United States located in the western Pacific Ocean. It is one of five U.S. territories with an established civilian government. Guam is listed as one of 16 Non-Self-Governing Territories by the Special Committee on Decolonization of the United...
on November 21, and lasted two weeks.
Meterological history
Early on November 21 the Joint Typhoon Warning CenterJoint Typhoon Warning Center
The Joint Typhoon Warning Center is a joint United States Navy – United States Air Force task force located at the Naval Maritime Forecast Center in Pearl Harbor, Hawaii...
(JTWC) reported that an area of convection had persisted within a monsoon trough about 880 km, (545 mi) to the southeast of Guam
Guam
Guam is an organized, unincorporated territory of the United States located in the western Pacific Ocean. It is one of five U.S. territories with an established civilian government. Guam is listed as one of 16 Non-Self-Governing Territories by the Special Committee on Decolonization of the United...
. 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. 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. 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.
Later on November 23, microwave imagery showed that an eye had developed within a well defined low level circulation center. 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. However despite the JTWC reporting 1-minute sustained wind speeds of 160 km/h, (100 mph), the JMA only reported 10-minute sustained wind speeds of 110 km/h, (70 mph) which made Nida a Severe Tropical Storm. Early on November 25 the JMA reported that Nida had intensifed into a typhoon before reporting later that day that the typhoon had rapidly intensifed under favourable conditions and reached its peak 10-minute wind speeds of 195 km/h (120 mph), with a peak pressure of 905 hPa. 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 (180 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 (185 mph).
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. The storm dissipated on December 4.
Micronesia
Early on November 24, the National Weather ServiceNational Weather Service
The National Weather Service , once known as the Weather Bureau, is one of the six scientific agencies that make up the National Oceanic and Atmospheric Administration of the United States government...
Weather Forecast Office in Tiyan, Guam
Guam
Guam is an organized, unincorporated territory of the United States located in the western Pacific Ocean. It is one of five U.S. territories with an established civilian government. Guam is listed as one of 16 Non-Self-Governing Territories by the Special Committee on Decolonization of the United...
(NWS Guam) placed the island of Faraulep
Faraulep
Faraulep Atoll is a coral atoll of three islands in the central Caroline Islands in the Pacific Ocean, and forms a legislative district in Yap State in the Federated States of Micronesia....
, before later that morning issuing tropical storm watches for Fais
Fais Island
Fais Island is a raised coral island in the eastern Caroline Islands in the Pacific Ocean, and forms a legislative district in Yap State in the Federated States of Micronesia...
and Ulithi
Ulithi
Ulithi is an atoll in the Caroline Islands of the western Pacific Ocean, about 191 km east of Yap. It consists of 40 islets totalling , surrounding a lagoon about long and up to wide—at one of the largest in the world. It is administered by the state of Yap in the Federated States of...
. As Nida was upgraded to a typhoon by the JTWC, the NWS upgraded the tropical storm warning for Faraulep to a typhoon warning. 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.
Records
Typhoon Nida was operationally estimated to have had a minimum pressure of 905 hPa, (26.72 inHg), by the Japan Meteorological Agency. Nida was the most intense tropical cycloneTropical cyclone
A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapor...
during 2009, surpassing Hurricane Rick
Hurricane Rick (2009)
Hurricane Rick was the second-most intense Pacific hurricane on record and the strongest ever to form during October. Developing south of Mexico on October 15, 2009, Hurricane Rick traversed an area favoring rapid intensification, allowing it to become a hurricane within 24 hours of being...
by 1 hPa.
See also
- 2009 Pacific typhoon season2009 Pacific typhoon seasonThe 2009 Pacific typhoon season was the period that tropical cyclones formed in the Western Pacific Ocean. The season ran throughout the year during 2009, with most tropical cyclones forming between May and November. The scope of this article is limited to the Pacific Ocean, north of the equator...
- Timeline of the 2009 Pacific typhoon seasonTimeline of the 2009 Pacific typhoon seasonThis timeline documents all of the events of the 2009 Pacific typhoon season which was the period that tropical cyclones formed in the Western Pacific Ocean during 2009, with most of the tropical cyclones forming between May and November. The scope of this article is limited to the Pacific Ocean,...
- Effects of the 2009 Pacific typhoon season in the PhilippinesEffects of the 2009 Pacific typhoon season in the PhilippinesThe effects of the 2009 Pacific typhoon season in the Philippines were considered some of the worst in decades. Throughout the year, series of typhoons impacted the country, with the worst damage occurring during September and October from Typhoons Ketsana and Parma.-Seasonal...