The 1990 season

Hurricane Polo (1990)

Hurricane Polo reached Category 1 in the Eastern Pacific between September 28, 1990 and October 1, 1990, with a lowest pressure of 987 mb.

Track and intensity

The whole track of Hurricane Polo, colored by strength, with the other storms of the 1990 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
Eastern Pacific
Dates
September 28, 1990 to October 1, 1990
Peak strength
Category 1, 65 kt (75 mph)
Lowest pressure
987 mb (29.15 inHg)
Landfall
No; closest approach 1298 km (807 mi)
Accumulated cyclone energy
2.0
Fastest the center moved
12 kt (14 mph)
Identifier
EP201990

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
Sep 28, 18:009.7N 137.1W25 kt1010 mbTropical depression
Sep 29, 00:0010.4N 137.5W25 kt1010 mbTropical depression
Sep 29, 06:0011.3N 137.8W30 kt1009 mbTropical depression
Sep 29, 12:0012.3N 138.1W30 kt1009 mbTropical depression
Sep 29, 18:0013.3N 138.3W45 kt1000 mbTropical storm
Sep 30, 00:0014.2N 138.7W55 kt994 mbTropical storm
Sep 30, 06:0015.0N 139.0W65 kt987 mbHurricane
Sep 30, 12:0015.5N 139.3W65 kt987 mbHurricane
Sep 30, 18:0016.0N 139.6W50 kt997 mbTropical storm
Oct 1, 00:0016.2N 140.3W45 kt1000 mbTropical storm
Oct 1, 06:0016.2N 141.5W40 kt1003 mbTropical storm
Oct 1, 12:0016.0N 142.6W30 kt1009 mbTropical depression
Oct 1, 18:0015.5N 143.5W25 kt1010 mbTropical depression

Other Eastern Pacific storms of 1990

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.

The National Hurricane Center has published no tropical cyclone report for this storm.