Tropical Storm Katia (2023)

Basin

North Atlantic

Dates

August 30, 2023 to September 15, 2023

Peak strength

Tropical Storm, 50 kt (58 mph)

Lowest pressure

998 mb (29.47 inHg)

Landfall

No; closest approach 409 km (254 mi)

Accumulated cyclone energy

1.3

Tropical-storm-force wind reached

100 nmi (185 km, 115 mi) from the center at its widest

Eyewall radius at its peak

30 nmi (56 km, 35 mi)

Overall size

240 nmi (444 km, 276 mi) to the outermost closed isobar

Peak gust in the best track

60 kt (69 mph)

Fastest the center moved

18 kt (21 mph)

Identifier

AL122023

The sources count different things and are not added together.

• Unnamed tropical stormNorth Atlantic · 2023Tropical Storm60 kt · 976 mb
• Tropical Storm ArleneNorth Atlantic · 2023Tropical Storm35 kt · 998 mb
• Tropical Storm BretNorth Atlantic · 2023Tropical Storm60 kt · 996 mb
• Tropical Storm CindyNorth Atlantic · 2023Tropical Storm50 kt · 1004 mb
• Hurricane DonNorth Atlantic · 2023Cat 165 kt · 986 mb
• Tropical Storm EmilyNorth Atlantic · 2023Tropical Storm45 kt · 998 mb
• Tropical Storm GertNorth Atlantic · 2023Tropical Storm50 kt · 998 mb
• Hurricane FranklinNorth Atlantic · 2023 · 3 deathsCat 4130 kt · 926 mb
• Tropical Storm HaroldNorth Atlantic · 2023Tropical Storm50 kt · 995 mb
• Hurricane IdaliaNorth Atlantic · 2023 · 8 deaths · $3.6 billionCat 4115 kt · 942 mb
• Tropical Storm JoseNorth Atlantic · 2023Tropical Storm55 kt · 996 mb
• Hurricane LeeNorth Atlantic · 2023 · 4 deathsCat 5145 kt · 926 mb
• Hurricane MargotNorth Atlantic · 2023Cat 180 kt · 969 mb
• Hurricane NigelNorth Atlantic · 2023Cat 285 kt · 958 mb
• Tropical Storm OpheliaNorth Atlantic · 2023 · $450 millionTropical Storm60 kt · 981 mb
• Tropical Storm PhilippeNorth Atlantic · 2023Tropical Storm50 kt · 998 mb
• Tropical Storm RinaNorth Atlantic · 2023Tropical Storm45 kt · 999 mb
• Tropical Storm SeanNorth Atlantic · 2023Tropical Storm40 kt · 1005 mb
• Hurricane TammyNorth Atlantic · 2023Cat 295 kt · 965 mb
• Unnamed tropical depressionNorth Atlantic · 2023Tropical Depression25 kt · 1007 mb
• Unnamed tropical depressionNorth Atlantic · 2023Tropical Depression30 kt · 1004 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