Unnamed tropical storm (1999)

Unnamed tropical storm peaked at 55 kt in the South Pacific between May 20, 1999 and May 27, 1999, with a lowest pressure of 972 mb.

Track and intensity

The whole track of Unnamed tropical storm, colored by strength, with the other storms of the 1999 season in the same basin behind it, and its wind and pressure hour by hour. Every fix is in the track table below.

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The storm

Basin: South Pacific
Dates: May 20, 1999 to May 27, 1999
Peak strength: Tropical Storm, 55 kt (63 mph), ten-minute wind
Lowest pressure: 972 mb (28.70 inHg)
Landfall: No; closest approach 159 km (99 mi)
Accumulated cyclone energy: 3.5
Identifier: 1999140S16157

Deaths and damage

No source this site reads carries a casualty or damage figure for this storm.

Track

Time (UTC)	Position	Wind	Pressure	Status
May 20, 06:00	15.5S 156.5E			Not reported
May 20, 12:00	16.0S 160.0E			Not reported
May 20, 18:00	16.6S 161.4E			Not reported
May 21, 00:00	18.0S 162.0E			Not reported
May 21, 06:00	20.0S 162.5E			Not reported
May 21, 12:00	21.0S 162.3E			Not reported
May 21, 18:00	22.0S 161.9E			Not reported
May 22, 00:00	22.8S 161.6E			Not reported
May 22, 06:00	23.3S 161.9E			Not reported
May 22, 12:00	23.8S 162.2E			Not reported
May 22, 18:00	24.6S 162.3E			Not reported
May 23, 00:00	25.5S 162.0E	40 kt	992 mb	Not reported
May 23, 06:00	26.5S 161.5E	50 kt	990 mb	Not reported
May 23, 12:00	27.4S 161.1E	50 kt	990 mb	Not reported
May 23, 18:00	28.3S 160.6E	50 kt	990 mb	Not reported
May 24, 00:00	29.5S 160.0E	50 kt	990 mb	Not reported
May 24, 06:00	30.5S 159.9E			Not reported
May 24, 12:00	31.0S 159.8E			Not reported
May 24, 18:00	33.6S 159.9E			Not reported
May 25, 00:00	35.9S 160.3E	55 kt	986 mb	Not reported
May 25, 06:00	37.8S 160.6E	55 kt	986 mb	Not reported
May 25, 12:00	40.5S 161.2E	55 kt	986 mb	Not reported
May 25, 18:00	44.0S 162.5E	55 kt	980 mb	Not reported
May 26, 00:00	46.5S 164.0E	55 kt	982 mb	Not reported
May 26, 06:00	49.5S 166.0E	50 kt	978 mb	Not reported
May 26, 12:00	52.0S 168.5E	45 kt	972 mb	Not reported
May 26, 18:00	55.5S 173.0E	45 kt	972 mb	Not reported
May 27, 00:00	57.5S 177.5E	40 kt	972 mb	Not reported
May 27, 06:00	59.0S 182.0E	30 kt	976 mb	Not reported
May 27, 12:00	60.5S 186.0E	30 kt	976 mb	Not reported

Other South Pacific storms of 1999

What this means

A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together. This storm’s winds are ten-minute averages from its regional agency. They read about 12 percent lower than the one-minute winds US agencies use, so a Saffir-Simpson category is not given for it.

Sources

Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.