Super Typhoon Atsani (2015)

Basin

Western Pacific

Dates

August 14, 2015 to August 29, 2015

Peak strength

Category 5, 140 kt (161 mph)

Lowest pressure

918 mb (27.11 inHg)

Landfall

No; closest approach 769 km (478 mi)

Accumulated cyclone energy

35.5

Tropical-storm-force wind reached

230 nmi (426 km, 265 mi) from the center at its widest

Hurricane-force wind reached

70 nmi (130 km, 81 mi) from the center at its widest

Eyewall radius at its peak

22 nmi (41 km, 25 mi)

Overall size

330 nmi (611 km, 380 mi) to the outermost closed isobar

Fastest the center moved

29 kt (33 mph)

Identifier

WP172015

The sources count different things and are not added together.

NOAA’s Storm Events database, the record National Weather Service offices compile months after a storm, as compiled March 2026.

Deaths

0 (0 direct, 0 indirect)

Injuries

0

Property damage

none recorded

Crop damage

none recorded

Events recorded

4 in 1 reports from 1 states and marine areas

State by state

What was recorded

4 high surf.

• Typhoon MekkhalaWestern Pacific · 2015 · 3 deathsCat 170 kt · 970 mb
• Super Typhoon HigosWestern Pacific · 2015Cat 4130 kt · 926 mb
• Tropical Storm BaviWestern Pacific · 2015Tropical Storm50 kt · 985 mb
• Super Typhoon MaysakWestern Pacific · 2015Cat 5150 kt · 911 mb
• Tropical Storm HaishenWestern Pacific · 2015Tropical Storm45 kt · 989 mb
• Super Typhoon NoulWestern Pacific · 2015Cat 5140 kt · 918 mb
• Super Typhoon DolphinWestern Pacific · 2015Cat 5140 kt · 918 mb
• Tropical Storm KujiraWestern Pacific · 2015Tropical Storm50 kt · 985 mb
• Typhoon Chan-HomWestern Pacific · 2015Cat 4120 kt · 933 mb
• Typhoon LinfaWestern Pacific · 2015Cat 175 kt · 967 mb
• Super Typhoon NangkaWestern Pacific · 2015Cat 4135 kt · 922 mb
• Unnamed tropical stormWestern Pacific · 2015Tropical Storm35 kt · 996 mb
• Super Typhoon SoudelorWestern Pacific · 2015 · 59 deathsCat 5155 kt · 907 mb
• Unnamed tropical depressionWestern Pacific · 2015Tropical Depression30 kt · 1000 mb
• Tropical Storm MolaveWestern Pacific · 2015Tropical Storm45 kt · 986 mb
• Typhoon GoniWestern Pacific · 2015Cat 4120 kt · 933 mb
• Tropical Storm EtauWestern Pacific · 2015Tropical Storm60 kt · 978 mb
• Tropical Storm VamcoWestern Pacific · 2015Tropical Storm35 kt · 996 mb
• Typhoon KrovanhWestern Pacific · 2015Cat 3100 kt · 948 mb
• Super Typhoon DujuanWestern Pacific · 2015Cat 4130 kt · 926 mb
• Typhoon MujigaeWestern Pacific · 2015Cat 4115 kt · 937 mb
• Typhoon Choi-WanWestern Pacific · 2015Cat 170 kt · 952 mb
• Super Typhoon KoppuWestern Pacific · 2015Cat 4130 kt · 926 mb
• Typhoon ChampiWestern Pacific · 2015Cat 4125 kt · 929 mb
• Unnamed tropical stormWestern Pacific · 2015Tropical Storm35 kt · 996 mb
• Typhoon In-FaWestern Pacific · 2015Cat 4120 kt · 933 mb
• Typhoon MelorWestern Pacific · 2015Cat 4125 kt · 929 mb
• Unnamed tropical depressionWestern Pacific · 2015Tropical Depression25 kt · 1004 mb
• Unnamed tropical depressionWestern Pacific · 2015Tropical Depression30 kt · 1001 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.