The 1973 season

Cyclone Adeline (1973)

Cyclone Adeline peaked at 70 kt in the South Pacific between January 27, 1973 and January 31, 1973, with a lowest pressure of 970 mb, and made landfall.

Track and intensity

The whole track of Cyclone Adeline, colored by strength, with the other storms of the 1973 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
January 27, 1973 to January 31, 1973
Peak strength
Cyclone, 70 kt (81 mph), ten-minute wind
Lowest pressure
970 mb (28.64 inHg)
Landfall
Yes
Accumulated cyclone energy
2.4
Identifier
SH171973

Deaths and damage

No source this site reads publishes a machine-readable casualty or damage figure for a storm of this era. The National Hurricane Center’s season tables begin in 1995 and carry deaths and damage only from 2005 in the Atlantic and 2020 in both basins; the US Storm Events record begins in 1996.

Track

Time (UTC)PositionWindPressureStatus
Jan 27, 00:0014.9S 138.7E30 kt998 mbTropical storm
Jan 27, 06:0015.0S 138.4E35 kt995 mbTropical storm
Jan 27, 12:0015.1S 138.1E35 kt995 mbTropical storm
Jan 27, 18:0015.1S 138.0E35 kt995 mbTropical storm
Jan 28, 00:0015.2S 137.9E35 kt995 mbTropical storm
Jan 28, 06:0015.4S 137.6E45 kt990 mbTropical storm
Jan 28, 12:0015.7S 137.3E60 kt980 mbTropical storm
Jan 28, 18:0015.9S 137.2E70 kt970 mbTropical storm
Jan 29, 00:0016.1S 137.2E70 kt970 mbTropical storm
Jan 29, 06:0016.5S 136.8E50 ktTropical storm
Jan 29, 12:0017.0S 136.4E40 ktTropical storm
Jan 29, 18:0017.7S 136.6E30 ktTropical storm
Jan 30, 00:0018.3S 136.8E25 ktTropical storm
Jan 30, 06:0018.8S 135.5ETropical storm
Jan 30, 12:0019.3S 134.0ETropical storm
Jan 30, 18:0019.7S 133.4ETropical storm
Jan 31, 00:0020.2S 132.8ETropical storm
Jan 31, 06:0020.8S 132.0ETropical storm
Jan 31, 12:0021.6S 131.0ETropical storm

Other South Pacific storms of 1973

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.