Unnamed tropical storm (1977)

Basin

South Pacific

Dates

February 20, 1977 to February 24, 1977

Peak strength

Tropical Storm, 40 kt (46 mph), ten-minute wind

Lowest pressure

990 mb (29.23 inHg)

Landfall

No; closest approach 804 km (500 mi)

Accumulated cyclone energy

0.3

Identifier

1977051S19194

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.

• Tropical Storm KimSouth Pacific · 1977Tropical Storm55 kt · 980 mb
• Tropical Storm LaurieSouth Pacific · 1977Tropical Storm55 kt · 980 mb
• Cyclone TedSouth Pacific · 1977Cat 3100 kt · 945 mb
• Cyclone MarionSouth Pacific · 1977Cat 170 kt · 980 mb
• Cyclone JuneSouth Pacific · 1977Cat 170 kt · 965 mb
• Tropical Storm KeithSouth Pacific · 1977Tropical Storm50 kt · 992 mb
• Unnamed tropical stormSouth Pacific · 1977Tropical Storm40 kt · 990 mb
• Unnamed tropical stormSouth Pacific · 1977Tropical Storm45 kt
• Tropical Storm LilySouth Pacific · 1977Tropical Storm40 kt · 996 mb
• Tropical Storm MilesSouth Pacific · 1977Tropical Storm45 kt · 994 mb
• Tropical Storm NancySouth Pacific · 1977Tropical Storm40 kt · 998 mb
• Tropical Storm OttoSouth Pacific · 1977Tropical Storm55 kt · 984 mb
• Tropical Storm NormanSouth Pacific · 1977Tropical Storm40 kt · 980 mb
• Tropical Storm PatSouth Pacific · 1977Tropical Storm55 kt · 980 mb
• Cyclone RobertSouth Pacific · 1977Cat 180 kt · 965 mb

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.

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.