Hurricane Irene (2005)

Basin

North Atlantic

Dates

August 4, 2005 to August 18, 2005

Peak strength

Category 2, 90 kt (104 mph)

Lowest pressure

970 mb (28.64 inHg)

Landfall

No; closest approach 497 km (309 mi)

Accumulated cyclone energy

13.1

Tropical-storm-force wind reached

360 nmi (667 km, 414 mi) from the center at its widest

Hurricane-force wind reached

30 nmi (56 km, 35 mi) from the center at its widest

Eyewall radius at its peak

15 nmi (28 km, 17 mi)

Overall size

200 nmi (370 km, 230 mi) to the outermost closed isobar

Peak gust in the best track

105 kt (121 mph)

Fastest the center moved

41 kt (47 mph)

Identifier

AL092005

The sources count different things and are not added together.

• Tropical Storm ArleneNorth Atlantic · 2005 · 1 death · $12 millionTropical Storm60 kt · 989 mb
• Tropical Storm BretNorth Atlantic · 2005 · 1 deathTropical Storm35 kt · 1002 mb
• Hurricane CindyNorth Atlantic · 2005 · 1 death · $320 millionCat 165 kt · 991 mb
• Hurricane DennisNorth Atlantic · 2005 · 42 deaths · $2.5 billionCat 4130 kt · 930 mb
• Hurricane EmilyNorth Atlantic · 2005 · 6 deathsCat 5140 kt · 929 mb
• Tropical Storm FranklinNorth Atlantic · 2005Tropical Storm60 kt · 997 mb
• Tropical Storm GertNorth Atlantic · 2005Tropical Storm40 kt · 1005 mb
• Tropical Storm HarveyNorth Atlantic · 2005Tropical Storm55 kt · 994 mb
• Unnamed tropical depressionNorth Atlantic · 2005Tropical Depression30 kt · 1008 mb
• Tropical Storm JoseNorth Atlantic · 2005 · 6 deathsTropical Storm50 kt · 998 mb
• Hurricane KatrinaNorth Atlantic · 2005 · 520 deaths · $125 billionCat 5150 kt · 902 mb
• Tropical Storm LeeNorth Atlantic · 2005Tropical Storm35 kt · 1006 mb
• Hurricane MariaNorth Atlantic · 2005Cat 3100 kt · 962 mb
• Hurricane NateNorth Atlantic · 2005Cat 180 kt · 979 mb
• Hurricane OpheliaNorth Atlantic · 2005 · 1 death · $70 millionCat 175 kt · 976 mb
• Hurricane PhilippeNorth Atlantic · 2005Cat 170 kt · 985 mb
• Hurricane RitaNorth Atlantic · 2005 · 7 deaths · $12 billionCat 5155 kt · 895 mb
• Unnamed tropical depressionNorth Atlantic · 2005Tropical Depression30 kt · 1006 mb
• Hurricane StanNorth Atlantic · 2005 · 80 deathsCat 170 kt · 977 mb
• Unnamed tropical stormNorth Atlantic · 2005Tropical Storm45 kt · 997 mb
• Tropical Storm TammyNorth Atlantic · 2005 · $25 millionTropical Storm45 kt · 1001 mb
• Unnamed tropical stormNorth Atlantic · 2005Tropical Storm40 kt · 1005 mb
• Hurricane VinceNorth Atlantic · 2005Cat 165 kt · 988 mb
• Hurricane WilmaNorth Atlantic · 2005 · 23 deaths · $21 billionCat 5160 kt · 882 mb
• Tropical Storm AlphaNorth Atlantic · 2005 · 28 deathsTropical Storm45 kt · 998 mb
• Hurricane BetaNorth Atlantic · 2005Cat 3100 kt · 962 mb
• Tropical Storm GammaNorth Atlantic · 2005 · 37 deathsTropical Storm45 kt · 1002 mb
• Tropical Storm DeltaNorth Atlantic · 2005Tropical Storm60 kt · 980 mb
• Hurricane EpsilonNorth Atlantic · 2005Cat 175 kt · 981 mb
• Tropical Storm ZetaNorth Atlantic · 2005Tropical Storm55 kt · 994 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
• Wikipedia article: Hurricane Irene