First system formed December 4, 2003 Name Heta Total depressions 12 | Last system dissipated April 24, 2004 Total disturbances 15 Tropical cyclones 3 | |
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The 2003–04 South Pacific cyclone season was a below-average season with only three tropical cyclones occurring within the South Pacific to the east of 160°E. The season officially ran from November 1, 2003 to April 30, 2004 with the first disturbance of the season forming on December 4 and the last disturbance dissipating on April 23. This is the period of the year when most tropical cyclones form within the South Pacific Ocean.
Contents
- Tropical Disturbance 02F
- Severe Tropical Cyclone Heta
- Severe Tropical Cyclone Ivy
- Tropical Depression 06F
- Tropical Cyclone Grace
- Tropical Depression 08F
- Tropical Depression 09F
- Tropical Depression 10F
- Tropical Depression 11F
- Tropical Depression 12F
- Tropical Depression 13F
- Other systems
- Season effects
- References
During the season at least 16 people were killed from tropical disturbances whilst overall damage was estimated at $218 million (2004 USD; $276 million 2017 USD). The most damaging tropical disturbance was Cyclone Heta which caused at least $211 million (2004 USD; $268 million 2017 USD) in damage to six different countries and left three dead. The deadliest tropical disturbance of the season was Tropical Depression 10F, which was responsible for eleven deaths and caused $2.74 million (2004 USD) in damage. Cyclone Ivy also caused 2 deaths and caused $4.17 million (2004 USD; $5.29 million 2017 USD) worth of damage to Vanuatu. As a result of the impacts caused by Heta and Ivy, the names were retired from the tropical cyclone naming lists.
Within the South Pacific, tropical cyclones are monitored by the Regional Specialized Meteorological Center (RSMC) in Nadi, Fiji, and the Tropical Cyclone Warning Center (TCWC) in Wellington, New Zealand. RSMC Nadi attaches a number and an F suffix to tropical disturbances that form in or move into the South Pacific. The United States Joint Typhoon Warning Center (JTWC) issues unofficial warnings within the South Pacific, designating tropical cyclones with a number and a P suffix. RSMC Nadi and TCWC Wellington both use the Australian Tropical Cyclone Intensity Scale, and measure windspeeds over a period of ten minutes, while the JTWC measures sustained winds over a period of one minute and uses the Saffir–Simpson Hurricane Scale.
Tropical Disturbance 02F
For several days, a tropical disturbance persisted in the south Pacific, lasting from December 16–20.
Severe Tropical Cyclone Heta
Cyclone Heta developed in the South Pacific Ocean and reached cyclone-force winds on January 1, 2004. It struck the island of Niue with a much more direct blow on January 6. Heta's eyewall hit Niue almost exactly at the height of the storm's power. It caused extensive property damage throughout the island, and two people were killed. Efforts to rebuild from the storm in Niue lasted almost the entire year of 2004.
Heta caused American Samoa to declare a state of emergency (officially a "Declaration of Emergency" in American Samoan law) on January 7, and even though officially the storm never made landfall there, it necessitated the emergency evacuation of 140 people and was responsible for property damage.
The nation of Tonga was also affected by Heta, as the winds swept away trees that were needed for the country's food supply. However, Tonga did not receive a direct hit or suffer such extensive loss as Niue.
Severe Tropical Cyclone Ivy
Numbered 05F. Existed between February 21 and February 28. Caused heavy damage in Vanuatu.
Tropical Depression 06F
Formed on March 20, dumped heavy rainfall in Vanuatu.
Tropical Cyclone Grace
Entered the region from the west on March 23, became extratropical the next day. Designated as 07F by Nadi.
Tropical Depression 08F
Existed between March 28 and April 1.
Tropical Depression 09F
Existed between April 1 and April 3.
Tropical Depression 10F
Existed between April 6 and April 9. The storm was given the number 22P by the Joint Typhoon Warning Center. It was responsible for causing severe flooding to Fiji and 11 deaths. Damage from the flooding was estimated at US$2.6 million.
Tropical Depression 11F
Existed on April 7.
Tropical Depression 12F
Formed on April 7, later caused severe flooding in Fiji.
Tropical Depression 13F
During April 11 a weak tropical low moved into the South Pacific basin from the Australian region, and was designated as Tropical Disturbance 13F by RSMC Nadi later that day.
Other systems
The first numbered tropical disturbance of the season developed within a large area of convection on December 4, to the northwest of the Fijian dependency of Rotuma. During that day the depression slowly moved west, before it was classified as a weak tropical depression during the next day. The system subsequently weakened and lost its organisation because of moderate to strong vertical windshear and was last noted during December 6. Tropical Disturbance 02F was subsequently first noted on December 16, to the northwest of the Solomon Island of San Cristobal. The system subsequently moved westwards within an area that was conducive for further development
On April 18, RSMC Nadi reported that Tropical Disturbance 15F had developed within the monsoon trough, about 515 km (320 mi) to the northeast of Nukuʻalofa in Tonga. During that day, the disturbance moved through the Tongan archipelago, before it was last noted later that day. During April 22, RSMC Nadi reported that Tropical Disturbance 15F had developed about 500 km (310 mi) to the northeast of the Solomon Islands. Over the next few days the disturbance remained near stationary, weak and disorganized, before it was last noted during April 24.
Season effects
This table lists all the storms that developed in the South Pacific to the east of longitude 160°E during the 2003–04 season.