The 1964 season

Tropical Depression Henrietta (1964)

Tropical Depression Henrietta peaked at unknown kt in the South Pacific between March 28, 1964 and April 10, 1964, with a lowest pressure of 960 mb, and made landfall.

Track and intensity

The whole track of Tropical Depression Henrietta, colored by strength, with the other storms of the 1964 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
March 28, 1964 to April 10, 1964
Peak strength
Tropical Depression
Lowest pressure
960 mb (28.35 inHg)
Landfall
Yes
Accumulated cyclone energy
0.0
Identifier
SH291964

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 28, 12:0012.2S 178.2ETropical storm
Mar 28, 18:0011.6S 177.7ETropical storm
Mar 29, 00:0011.2S 176.9ETropical storm
Mar 29, 06:0011.1S 175.8ETropical storm
Mar 29, 12:0011.2S 174.6ETropical storm
Mar 29, 18:0011.5S 173.3ETropical storm
Mar 30, 00:0012.0S 172.0ETropical storm
Mar 30, 06:0012.7S 170.7ETropical storm
Mar 30, 12:0013.5S 169.5ETropical storm
Mar 30, 18:0014.3S 168.3ETropical storm
Mar 31, 00:0015.1S 167.1ETropical storm
Mar 31, 06:0015.6S 166.2ETropical storm
Mar 31, 12:0016.0S 165.3ETropical storm
Mar 31, 18:0016.3S 164.4ETropical storm
Apr 1, 00:0016.6S 163.4ETropical storm
Apr 1, 06:0017.1S 162.3ETropical storm
Apr 1, 12:0017.7S 161.3ETropical storm
Apr 1, 18:0018.4S 160.6ETropical storm
Apr 2, 00:0019.1S 160.0ETropical storm
Apr 2, 06:0019.7S 159.5ETropical storm
Apr 2, 12:0020.2S 159.1ETropical storm
Apr 2, 18:0020.8S 158.9ETropical storm
Apr 3, 00:0021.5S 159.0ETropical storm
Apr 3, 06:0022.4S 159.3ETropical storm
Apr 3, 12:0023.4S 159.6ETropical storm
Apr 3, 18:0023.9S 159.9ETropical storm
Apr 4, 00:0024.4S 160.6ETropical storm
Apr 4, 06:0025.2S 162.0ETropical storm
Apr 4, 12:0026.0S 163.5ETropical storm
Apr 4, 18:0026.5S 164.8ETropical storm
Apr 5, 00:0027.0S 166.0ETropical storm
Apr 5, 06:0027.4S 166.7ETropical storm
Apr 5, 12:0027.8S 167.0ETropical storm
Apr 5, 18:0028.1S 167.2ETropical storm
Apr 6, 00:0028.5S 167.3ETropical storm
Apr 6, 06:0029.0S 167.4ETropical storm
Apr 6, 12:0029.5S 167.5ETropical storm
Apr 6, 18:0030.0S 167.5ETropical storm
Apr 7, 00:0030.6S 167.5ETropical storm
Apr 7, 06:0031.1S 167.5ETropical storm
Apr 7, 12:0031.7S 167.6ETropical storm
Apr 7, 18:0032.2S 167.5ETropical storm
Apr 8, 00:0032.7S 167.8ETropical storm
Apr 8, 06:0033.3S 169.0ETropical storm
Apr 8, 12:0033.8S 170.6ETropical storm
Apr 8, 18:0033.9S 171.9ETropical storm
Apr 9, 00:0034.0S 173.3ETropical storm
Apr 9, 06:0034.5S 174.6ETropical storm
Apr 9, 12:0035.0S 176.0ETropical storm
Apr 9, 18:0035.4S 177.0ETropical storm
Apr 10, 00:0035.7S 177.7ETropical storm

Other South Pacific storms of 1964

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.