Tropical Storm Irwin (2023)

Basin

Eastern Pacific

Dates

August 26, 2023 to September 3, 2023

Peak strength

Tropical Storm, 40 kt (46 mph)

Lowest pressure

998 mb (29.47 inHg)

Landfall

No; closest approach 1171 km (728 mi)

Accumulated cyclone energy

1.1

Tropical-storm-force wind reached

120 nmi (222 km, 138 mi) from the center at its widest

Eyewall radius at its peak

80 nmi (148 km, 92 mi)

Overall size

320 nmi (593 km, 368 mi) to the outermost closed isobar

Peak gust in the best track

50 kt (58 mph)

Fastest the center moved

16 kt (18 mph)

Identifier

EP102023

The sources count different things and are not added together.

• Hurricane AdrianEastern Pacific · 2023Cat 290 kt · 970 mb
• Hurricane BeatrizEastern Pacific · 2023Cat 175 kt · 992 mb
• Hurricane CalvinEastern Pacific · 2023Cat 3110 kt · 953 mb
• Unnamed tropical depressionEastern Pacific · 2023Tropical Depression30 kt · 1006 mb
• Hurricane DoraEastern Pacific · 2023Cat 4130 kt · 939 mb
• Tropical Storm EugeneEastern Pacific · 2023Tropical Storm60 kt · 992 mb
• Hurricane FernandaEastern Pacific · 2023Cat 4115 kt · 949 mb
• Tropical Storm GregEastern Pacific · 2023Tropical Storm45 kt · 1000 mb
• Hurricane HilaryEastern Pacific · 2023 · 3 deaths · $900 millionCat 4120 kt · 940 mb
• Hurricane JovaEastern Pacific · 2023Cat 5140 kt · 926 mb
• Unnamed tropical depressionEastern Pacific · 2023Tropical Depression30 kt · 1006 mb
• Tropical Storm KennethEastern Pacific · 2023Tropical Storm45 kt · 1000 mb
• Unnamed tropical depressionEastern Pacific · 2023Tropical Depression30 kt · 1006 mb
• Hurricane LidiaEastern Pacific · 2023 · 3 deathsCat 4120 kt · 942 mb
• Tropical Storm MaxEastern Pacific · 2023 · 2 deathsTropical Storm60 kt · 990 mb
• Hurricane NormaEastern Pacific · 2023Cat 4115 kt · 939 mb
• Hurricane OtisEastern Pacific · 2023 · 52 deathsCat 5145 kt · 922 mb
• Tropical Storm PilarEastern Pacific · 2023 · 4 deathsTropical Storm55 kt · 995 mb
• Tropical Storm RamonEastern Pacific · 2023Tropical Storm40 kt · 1002 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.

• Tropical cyclone report, National Hurricane Center
• Every advisory and discussion NHC issued while it was live
• Best track as KMZ, National Hurricane Center
• Best track as a shapefile, National Hurricane Center