The 1973 season

Tropical Depression Lydie (1973)

Tropical Depression Lydie peaked at unknown kt in the South Indian between March 4, 1973 and March 16, 1973.

Track and intensity

The whole track of Tropical Depression Lydie, 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 Indian
Dates
March 4, 1973 to March 16, 1973
Peak strength
Tropical Depression
Landfall
No; closest approach 320 km (199 mi)
Accumulated cyclone energy
0.0
Identifier
SH291973

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
Mar 4, 06:0011.6S 71.1ETropical storm
Mar 4, 12:0011.9S 70.9ETropical storm
Mar 4, 18:0012.2S 70.7ETropical storm
Mar 5, 00:0012.5S 70.6ETropical storm
Mar 5, 06:0012.8S 70.4ETropical storm
Mar 5, 12:0013.0S 69.3ETropical storm
Mar 5, 18:0013.1S 67.5ETropical storm
Mar 6, 00:0013.3S 65.7ETropical storm
Mar 6, 06:0013.6S 64.0ETropical storm
Mar 6, 12:0013.8S 62.4ETropical storm
Mar 6, 18:0014.0S 60.8ETropical storm
Mar 7, 00:0014.4S 59.4ETropical storm
Mar 7, 06:0014.8S 58.2ETropical storm
Mar 7, 12:0015.0S 57.1ETropical storm
Mar 7, 18:0015.3S 56.2ETropical storm
Mar 8, 00:0015.6S 55.4ETropical storm
Mar 8, 06:0015.9S 54.7ETropical storm
Mar 8, 12:0016.2S 54.3ETropical storm
Mar 8, 18:0016.6S 53.9ETropical storm
Mar 9, 00:0016.9S 53.6ETropical storm
Mar 9, 06:0017.2S 53.3ETropical storm
Mar 9, 12:0020.4S 52.7ETropical storm
Mar 9, 18:0023.7S 52.1ETropical storm
Mar 10, 00:0021.8S 51.8ETropical storm
Mar 10, 06:0020.0S 51.6ETropical storm
Mar 10, 12:0020.8S 51.4ETropical storm
Mar 10, 18:0021.6S 51.3ETropical storm
Mar 11, 00:0022.5S 51.4ETropical storm
Mar 11, 06:0023.4S 51.7EMixed
Mar 11, 12:0024.2S 52.3EMixed
Mar 11, 18:0025.0S 53.1EMixed
Mar 12, 00:0025.8S 54.1EMixed
Mar 12, 06:0026.4S 55.0EMixed
Mar 12, 12:0026.6S 55.2EMixed
Mar 12, 18:0026.6S 55.4EMixed
Mar 13, 00:0026.5S 55.7EMixed
Mar 13, 06:0026.7S 56.0EMixed
Mar 13, 12:0027.7S 56.6EMixed
Mar 13, 18:0028.9S 57.2EMixed
Mar 14, 00:0030.0S 57.7EMixed
Mar 14, 06:0031.0S 58.1EMixed
Mar 14, 12:0031.7S 58.4EMixed
Mar 14, 18:0032.5S 58.7EMixed
Mar 15, 00:0033.2S 58.9EMixed
Mar 15, 06:0034.0S 59.0EMixed
Mar 15, 12:0033.3S 57.2EExtratropical
Mar 15, 18:0033.7S 57.8EExtratropical
Mar 16, 00:0033.9S 58.2EExtratropical
Mar 16, 06:0034.0S 59.0EExtratropical

Other South Indian 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.

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.