hurricanesmapped

NORTH ATLANTIC · SEASON MAP

2011 Atlantic hurricane season

Every recorded track, mapped · 20 storms · 28 Jun 2011–11 Nov 2011

ACCUMULATED CYCLONE ENERGY126.3
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2011 Atlantic hurricane season: every recorded storm trackRecorded tracks of all 20 storms, colored by the wind category at each observation. Hover or focus a storm in the table to highlight its track.UNITED STATESCANADAMEXICOCUBABRAZILAFRICAEUROPECHINAJAPANINDIAGulf of MexicoAtlantic OceanPacific OceanArabian SeaBay of BengalArlene: 28 Jun–1 Jul, peak 55 kt, Tropical stormBret: 17 Jul–22 Jul, peak 60 kt, Tropical stormCindy: 20 Jul–22 Jul, peak 60 kt, Tropical stormDon: 27 Jul–30 Jul, peak 45 kt, Tropical stormEmily: 2 Aug–7 Aug, peak 45 kt, Tropical stormFranklin: 12 Aug–13 Aug, peak 40 kt, Tropical stormGert: 13 Aug–16 Aug, peak 55 kt, Tropical stormHarvey: 19 Aug–22 Aug, peak 55 kt, Tropical stormIrene: 21 Aug–28 Aug, peak 105 kt, Category 3Unnamed: 25 Aug–26 Aug, peak 30 kt, Tropical depressionJose: 27 Aug–28 Aug, peak 40 kt, Tropical stormKatia: 29 Aug–10 Sep, peak 120 kt, Category 4Unnamed: 1 Sep–2 Sep, peak 40 kt, Tropical stormLee: 2 Sep–3 Sep, peak 48 kt, Tropical stormMaria: 6 Sep–16 Sep, peak 70 kt, Category 1Nate: 7 Sep–11 Sep, peak 65 kt, Category 1Ophelia: 20 Sep–3 Oct, peak 120 kt, Category 4Philippe: 24 Sep–8 Oct, peak 80 kt, Category 1Rina: 23 Oct–28 Oct, peak 100 kt, Category 3Sean: 8 Nov–11 Nov, peak 55 kt, Tropical storm

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Whole season

DepressionTropical stormCat 1Cat 2Cat 3Cat 4Cat 5Post-tropical
Every storm of the 2011 Atlantic hurricane season. Column headers sort the list.
Arlene–55Tropical storm993380
Bret–60Tropical storm9951,560
Cindy–60Tropical storm9941,770
Don–45Tropical storm997780
Emily–45Tropical storm10031,640
Franklin–40Tropical storm10041,510
Gert–55Tropical storm10001,690
Harvey–55Tropical storm994910
Irene–105Cat 39423,100
Unnamed–30Tropical depression1006380
Jose–40Tropical storm1006930
Katia–120Cat 49426,750
Unnamed–40Tropical storm1002470
Lee–48Tropical storm995750
Maria–70Cat 19833,790
Nate–65Cat 1994470
Ophelia–120Cat 49404,440
Philippe–80Cat 19764,170
Rina–100Cat 3966890
Sean–55Tropical storm9821,550

20 storms with an IBTrACS 2011 hurricane season record. Tracks are the archived center positions, first observation 28 Jun 2011, last 11 Nov 2011.

Tropical storms19

Tropical-stage US-agency wind of 34 kt or more

Hurricanes7

64 kt or more, one-minute sustained

Major (Category 3+)4

96 kt or more, Saffir–Simpson scale

Category 50

137 kt or more at any tropical-stage observation

Strongest stormKatia

120 kt · 138 mph / 222 km/h

Lowest pressure940 hPa

Ophelia, 2 Oct 2011

Longest track record16 days

Philippe, full archive record

Storms without US-agency wind0

Mapped, but outside the counts above

QUICK ANSWERS

The 2011 season in brief

How many hurricanes were there in the 2011 Atlantic hurricane season?

The archive records 7 hurricanes (one-minute winds of 64 kt or more) among 19 tropical storms, with 4 major hurricanes reaching 96 kt. Counts use US-agency winds during the tropical stage.

What was the strongest storm of the 2011 Atlantic hurricane season?

Katia, with a peak one-minute sustained wind of 120 kt (Category 4) on 6 Sept 2011, 00:00 UTC and a minimum central pressure of 942 hPa.

How many Category 5 storms were there in 2011?

None. No storm in the 2011 Atlantic hurricane season reached Category 5 on the Saffir–Simpson one-minute wind scale in the archive.

When did the 2011 Atlantic hurricane season start and end?

The first tropical-stage observation is on 28 Jun 2011 and the last on 11 Nov 2011, from 20 tracked storms in the archive.

What was the first hurricane of the 2011 Atlantic hurricane season?

Irene, which reached hurricane strength (64 kt) on 22 Aug 2011, 06:00 UTC.

METHODOLOGY

Data sources and limitations

The map and totals are generated from NOAA’s IBTrACS v04r01 archive. A storm belongs to this page when the archive lists it in the North Atlantic basin for the 2011 season, so a December storm whose track ends in January stays with its season. Storms that cross between basins appear on the page of their archive basin only.

Counts use US-agency one-minute winds during the tropical stage: 34 kt for a tropical storm, 64 kt for hurricane strength and 96 kt for major intensity, on the Saffir–Simpson scale in every basin. Local agencies classify storms differently, and official season summaries can differ from the archive. Accumulated cyclone energy sums squared winds at six-hourly synoptic times, counting observations in the calendar year. Storms with no US-agency wind are mapped but cannot enter the counts.

The map frame is the same for every North Atlantic season, so a track that leaves it is cut at the edge. Lines show each storm’s center, not its size, rainfall or flood extent. Coastlines use Natural Earth’s 1:10m land data.

Archive retrieved

NOAA IBTrACS archive · Field documentation

Sources & methodology