2011 Atlantic Hurricane Season

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2011 Atlantic Hurricane Season

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The National Hurricane Center's Tropical Cyclone Reports contain comprehensive information on each tropical cyclone, including synoptic history, meteorological statistics, casualties and damages, and the post-analysis best track (six-hourly positions and intensities). Tropical cyclones include depressions, storms and hurricanes. Tropical depressions listed below are those that did not reach tropical storm strength.

XML index of all Tropical Cyclone Reports

Tropical Storm Arlene – PDF – KMZ
Tropical Storm Bret – PDF – KMZ
Tropical Storm Cindy – PDF – KMZ
Tropical Storm Don – PDF – KMZ
Tropical Storm Emily – PDF – KMZ
Tropical Storm Franklin – PDF – KMZ
Tropical Storm Gert – PDF – KMZ
Tropical Storm Harvey – PDF – KMZ
Hurricane Irene¹ – PDF – KMZ
Tropical Depression Ten – PDF – KMZ
Tropical Storm Jose – PDF – KMZ
Hurricane Katia – PDF – KMZ
Unnamed Tropical Storm² – PDF – KMZ
Tropical Storm Lee – PDF – KMZ
Hurricane Maria – PDF – KMZ
Hurricane Nate³ – PDF – KMZ
Hurricane Ophelia – PDF – KMZ
Hurricane Philippe – PDF – KMZ
Hurricane Rina – PDF – KMZ
Tropical Storm Sean – PDF – KMZ

Irene updated 11 April 2013
This unnamed tropical storm was identified in post-season analysis.
Nate was reclassified to hurricane status in post-storm analysis.

Summary Table

A brief overview of the hurricane season is available in the 2011 Atlantic Annual Summary (PDF).

North Atlantic Tropical Weather Summary (2011)

Track Map for North Atlantic Season 2011

Storm Number	Storm Name	Type^a	Dates^b (UTC)	Max. Winds (kt)	Min. Pressure (mb)	Accumulated Cyclone Energy^c (x10⁴ kt²)
1	Arlene	TS	28 Jun–01 Jul	55	993	1.9
2	Bret	TS	17 Jul–22 Jul	60	995	3.3
3	Cindy	TS	20 Jul–22 Jul	60	994	2.3
4	Don	TS	27 Jul–30 Jul	45	997	1.6
5	Emily	TS	02 Aug–07 Aug	45	1003	2.3
6	Franklin	TS	12 Aug–13 Aug	40	1004	0.3
7	Gert	TS	13 Aug–16 Aug	55	1000	1.9
8	Harvey	TS	19 Aug–22 Aug	55	994	1.5
9	Irene	MH	21 Aug–28 Aug	105	942	18.8
10	Ten	TD	25 Aug–26 Aug	30	1006	0.0
11	Jose	TS	27 Aug–28 Aug	40	1006	0.8
12	Katia	MH	29 Aug–10 Sep	120	942	27.0
13	Lee	TS	02 Sep–05 Sep	50	986	1.8
14	Maria	HU	06 Sep–16 Sep	70	983	9.2
15	Nate	HU	07 Sep–11 Sep	65	994	4.3
16	Ophelia	MH	20 Sep–03 Oct	120	940	18.7
17	Philippe	HU	24 Sep–08 Oct	80	976	15.9
18	Rina	MH	23 Oct–28 Oct	100	966	10.1
19	Sean	TS	08 Nov–11 Nov	55	982	3.7
20	Noname	TS	01 Sep–02 Sep	40	1002	0.8

2011 North Atlantic Summary
Named Storms (vs 1991-2020 Normal)	Hurricanes (vs 1991-2020 Normal)	Major Hurricanes (vs 1991-2020 Normal)	Total ACE (x10⁴ kt²) (% Difference of 1991-2020 Normal)	Total Direct Deaths	Total U.S. Damage^e ($million)
19 (+5)	7 (0)	4 (+1)	126.3 (+3% )	0	0

^a Tropical depression (TD) or Subtropical Depression (SD), maximum sustained winds 33 kt or less; tropical storm (TS) or Subtropical Storm (SS), winds 34-63 kt; hurricane (HU), winds 64-95 kt; major hurricane (MH), winds 96 kt or higher.

^b Dates begin at 0000 UTC and include all tropical and subtropical cyclone stages; non-tropical stages are excluded except for PTCs which have no tropical stages.

^c Accumulated Cyclone Energy is an index that is defined as the sum of the squares of the maximum sustained surface wind speed (knots) measured every six hours for all named storms while they are at least tropical storm intensity. Note the ACE total in this table is only for the basin being summarized (e.g., 140°W–180° in the Central Pacific).

^d Deaths occurring as a direct result of the forces of the tropical cyclone are referred to as “direct” deaths. These would include those persons who drowned in storm surge, rough seas, rip currents, and freshwater floods. Direct deaths also include casualties resulting from lightning and wind-related events (e.g., collapsing structures).

^e U.S. damage totals are based on values provided by the NOAA National Centers for Environmental Information (NCEI).

Last updated: August 11, 2025

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