Unnamed tropical storm (2021)

Basin

Western Pacific

Dates

September 1, 2021 to September 4, 2021

Peak strength

Tropical Storm, 35 kt (40 mph)

Lowest pressure

1001 mb (29.56 inHg)

Landfall

No; closest approach 1403 km (872 mi)

Accumulated cyclone energy

0.1

Identifier

WP172021

No source this site reads carries a casualty or damage figure for this storm.

• Tropical Storm DujuanWestern Pacific · 2021Tropical Storm45 kt · 991 mb
• Super Typhoon SurigaeWestern Pacific · 2021Cat 5170 kt · 882 mb
• Unnamed tropical stormWestern Pacific · 2021Tropical Storm35 kt · 1000 mb
• Tropical Storm Choi-WanWestern Pacific · 2021Tropical Storm45 kt · 996 mb
• Tropical Storm KogumaWestern Pacific · 2021Tropical Storm35 kt · 996 mb
• Typhoon ChampiWestern Pacific · 2021Cat 165 kt · 987 mb
• Unnamed tropical depressionWestern Pacific · 2021Tropical Depression30 kt · 1000 mb
• Unnamed tropical depressionWestern Pacific · 2021Tropical Depression30 kt · 1003 mb
• Typhoon In-FaWestern Pacific · 2021Cat 295 kt · 951 mb
• Typhoon CempakaWestern Pacific · 2021Cat 180 kt · 965 mb
• Tropical Storm NepartakWestern Pacific · 2021Tropical Storm40 kt · 981 mb
• Unnamed tropical stormWestern Pacific · 2021Tropical Storm35 kt · 995 mb
• Tropical Storm LupitWestern Pacific · 2021Tropical Storm45 kt · 976 mb
• Tropical Storm MirinaeWestern Pacific · 2021Tropical Storm55 kt · 977 mb
• Tropical Storm NidaWestern Pacific · 2021Tropical Storm55 kt · 985 mb
• Typhoon ConsonWestern Pacific · 2021Cat 165 kt · 980 mb
• Super Typhoon ChanthuWestern Pacific · 2021Cat 5155 kt · 902 mb
• Tropical Storm DianmuWestern Pacific · 2021Tropical Storm35 kt · 1001 mb
• Super Typhoon MindulleWestern Pacific · 2021Cat 5140 kt · 916 mb
• Tropical Storm LionrockWestern Pacific · 2021Tropical Storm45 kt · 989 mb
• Tropical Storm KompasuWestern Pacific · 2021Tropical Storm60 kt · 979 mb
• Tropical Storm NamtheunWestern Pacific · 2021Tropical Storm55 kt · 988 mb
• Typhoon MalouWestern Pacific · 2021Cat 285 kt · 968 mb
• Unnamed tropical stormWestern Pacific · 2021Tropical Storm35 kt · 1000 mb
• Super Typhoon NyatohWestern Pacific · 2021Cat 4130 kt · 928 mb
• Super Typhoon RaiWestern Pacific · 2021Cat 5150 kt · 908 mb
• Unnamed tropical depressionWestern Pacific · 2021Tropical Depression30 kt · 1003 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.

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.