Hurricane Isaac (2018)

Basin

North Atlantic

Dates

September 7, 2018 to September 15, 2018

Peak strength

Category 1, 65 kt (75 mph)

Lowest pressure

995 mb (29.38 inHg)

Landfall

No; closest approach 290 km (180 mi)

Accumulated cyclone energy

6.8

Tropical-storm-force wind reached

140 nmi (259 km, 161 mi) from the center at its widest

Hurricane-force wind reached

10 nmi (19 km, 12 mi) from the center at its widest

Eyewall radius at its peak

10 nmi (19 km, 12 mi)

Overall size

210 nmi (389 km, 242 mi) to the outermost closed isobar

Peak gust in the best track

80 kt (92 mph)

Fastest the center moved

18 kt (21 mph)

Identifier

AL092018

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

• Tropical Storm AlbertoNorth Atlantic · 2018Tropical Storm55 kt · 990 mb
• Hurricane BerylNorth Atlantic · 2018Cat 170 kt · 991 mb
• Hurricane ChrisNorth Atlantic · 2018Cat 290 kt · 969 mb
• Tropical Storm DebbyNorth Atlantic · 2018Tropical Storm45 kt · 998 mb
• Tropical Storm ErnestoNorth Atlantic · 2018Tropical Storm40 kt · 999 mb
• Hurricane FlorenceNorth Atlantic · 2018 · 32 deathsCat 4130 kt · 937 mb
• Tropical Storm GordonNorth Atlantic · 2018Tropical Storm60 kt · 996 mb
• Hurricane HeleneNorth Atlantic · 2018Cat 295 kt · 967 mb
• Tropical Storm JoyceNorth Atlantic · 2018Tropical Storm45 kt · 995 mb
• Unnamed tropical depressionNorth Atlantic · 2018Tropical Depression30 kt · 1007 mb
• Hurricane LeslieNorth Atlantic · 2018 · 11 deathsCat 180 kt · 968 mb
• Tropical Storm KirkNorth Atlantic · 2018Tropical Storm55 kt · 998 mb
• Hurricane MichaelNorth Atlantic · 2018 · 72 deaths · $15 billionCat 5140 kt · 919 mb
• Tropical Storm NadineNorth Atlantic · 2018Tropical Storm55 kt · 995 mb
• Hurricane OscarNorth Atlantic · 2018Cat 295 kt · 952 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