Tropical Storm Dianmu (2021)

Basin

Western Pacific

Dates

September 21, 2021 to September 26, 2021

Peak strength

Tropical Storm, 35 kt (40 mph)

Lowest pressure

1001 mb (29.56 inHg)

Landfall

Yes

Accumulated cyclone energy

0.1

Tropical-storm-force wind reached

40 nmi (74 km, 46 mi) from the center at its widest

Eyewall radius at its peak

30 nmi (56 km, 35 mi)

Overall size

180 nmi (333 km, 207 mi) to the outermost closed isobar

Fastest the center moved

16 kt (18 mph)

Identifier

WP212021

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

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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.

• Wikipedia article: Tropical Storm Dianmu