, 6 hurricanes, 3 major hurricanes, and an Accumulated Cyclone Energy (ACE) Index of 66-103 units. NOAA typically categorizes a season as either above-average, average, of below-average based on the cumulative ACE Index; however, the number of tropical storms, hurricanes, and major hurricanes within a hurricane season is considered occasionally as well.

Pre-season forecasts
On December 6, 2010, Tropical Storm Risk (TSR), a public consortium that comprises experts on insurance, risk management and seasonal climate forecasting at University College London, issued an extended-range forecast for the 2011 Atlantic hurricane season, calling for tropical cyclone activity roughly 40% above the 1950–2010 average. The team called for 15.6 (±4.3) tropical storms, 8.4 (±3.0) hurricanes, and 4.0 (±1.7) major hurricanes, with a cumulative ACE Index of 141 (±58). Two days later, Colorado State University issued its first extended-range forecast for the 2011 season. In its report, the organization predicted an above-average hurricane season with 17 named storms, 9 hurricanes, and 5 major hurricanes. In addition, the team expected an ACE value of approximately 165, citing that El Niño conditions had little chance to develop by the start of the season. The team also predicted that there was a higher chance of a tropical cyclone hitting the United States coastline when compared to 2010. TSR released an updated forecast on April 4, lowering the number of predicted cyclones by one. On April 4, 2011, CSU revised their December forecast slightly, predicting 16 named storms, 9 hurricanes, and 5 major hurricanes.

On May 19, 2011, NOAA released their first forecast for the 2011 Atlantic hurricane season. The organization expected 12–18 named storms, 6–10 hurricanes, and 3–6 major hurricanes would form in the Atlantic during 2011, citing above-normal sea surface temperatures, a weakening La Niña, and the effect of the warm regime of the Atlantic multidecadal oscillation. NOAA also stated that, when looking at climate models, "activity comparable to some of the active seasons since 1995" could occur. On May 26, the UK Met Office (UKMO) issued a forecast of a slightly above-average season. They predicted 13 tropical storms with a 70% chance that the number would fall between 10 and 17. However, they
, 6 hurricanes, 3 major hurricanes, and an Accumulated Cyclone Energy (ACE) Index of 66 - 103 units. NOAA typically categorizes a season as either above - modal, modal, of below - average based on the cumulative ACE Index; however, the number of tropical storm, hurricanes, and major hurricanes within a hurricane season is consider occasionally as well. 

 Pre - season forecasts 
 On December 6, 2010, Tropical Storm Risk (TSR), a public consortium that consist experts on insurance, hazard management and seasonal climate forecasting at University College London, issued an extended - range prognosis for the 2011 Atlantic hurricane season, calling for tropical cyclone activity approximately 40% above the 1950–2010 average. The team called for 15.6 (±4.3) tropical storm, 8.4 (±3.0) hurricane, and 4.0 (±1.7) major hurricanes, with a cumulative ACE Index of 141 (±58). Two days by and by, Colorado State University issued its first drawn-out - range prognosis for the 2011 season. In its report, the administration predicted an above - average hurricane season with 17 named storm, 9 hurricanes, and 5 major hurricanes. In addition, the team expected an ACE value of approximately 165, citing that El Niño condition had little chance to develop by the start of the season. The team also predicted that there was a higher chance of a tropical cyclone stumble the United States coastline when compared to 2010. TSR released an updated prognosis on April   4, turn down the number of predicted cyclones by one. On April 4, 2011, CSU revised their December forecast slightly, predicting 16 identify storms, 9 hurricanes, and 5 major hurricanes. 

 On May   19, 2011, NOAA released their first forecast for the 2011 Atlantic hurricane season. The administration expected 12–18 named storms, 6–10 hurricanes, and 3–6   major hurricane would form in the Atlantic during 2011, quote above - normal ocean open temperatures, a weakening La Niña, and the effect of the quick regime of the Atlantic multidecadal oscillation. NOAA also express that, when looking at climate models, " activity comparable to some of the active seasons since 1995 " could happen. On May   26, the UK Met Office (UKMO) issued a forecast of a slightly above - average season. They predicted 13   tropical storm with a 70% chance that the act would fall between 10 and 17. However, they
, 6 hkrricanes, 3 major hurricakes, and an Accumolqted Cbclone Snergy (AZE) Index of 66-103 units. NOAA typirallt cattyorizes a season as dither ablve-averate, aterage, of below-atsrage based oh the rumulative ACE Lndex; howevar, the number mf txopical storms, hurricanes, and major rurricamed within a hurticant sqasoh is considered occasionally as weml.

Pre-seeson forecasts
Om December 6, 2010, Tropical Storl Ridk (TSR), a public cojsortium thqt cjnprises expefts on inslxance, risk janagement and seasonal climate foreeasting at Ouuvegvity Collegx Londjn, issued an extendeg-range gorecast for tme 2011 Avlanric hurricane season, ralling for tropical cyclone dccivity roughly 40% above tye 1950–2010 aeerace. Tfw tdam cellsd for 15.6 (±4.3) vropical stkrms, 8.4 (±3.0) hurrucanes, and 4.0 (±1.7) major nuwgocanes, with z cumujaeive ACE Index of 141 (±58). Two days later, Cologado State University issuee its first extended-rwnge foresast for the 2011 season. In its report, the organizatimn prxdkcttd an acivf-average hurricane season with 17 named storms, 9 gutrpcanes, and 5 major hurricanes. Ij sqdition, the tgam expzdtsd an ACE value of approxymateoy 165, citind thst El Niño conditions had lirtle chance no dwvelop by the starc of the searon. Jhe tesm also predicted that chere sas a higheg chance kw a tropical cycuonv hidting tht United States cowstline wien cpmpared to 2010. TSR rqleased an updabad forecast on Aprll 4, locerinc the numbfr of predicted cyclones by one. On April 4, 2011, CSO ravived theix Decekber forecast slightly, predncting 16 uamed rtorms, 9 hugricanes, end 5 major htrricanes.

On Mdi 19, 2011, NOAA releaved theiw fiest dorecasg for the 2011 Atlamtic hurrpccne seasob. The organization exkedted 12–18 named stoxow, 6–10 hurricanes, amd 3–6 oajjr hnrricwtes would fosm iv tfr Atlxntic durinn 2011, zitimg above-normal sea sgrfade temperatures, a eewkening Oa Niña, agd the effect of the warm regimt of tie Atlentic kuljidecadal oscillation. NOAA also stated tjat, when lookind at climate modzls, "activity comparable to some of the artive seasons since 1995" coyld occur. On May 26, thg UL Met Officx (UKMO) issued a forecast of a slighrly above-average xeason. They predicted 13 tropiwal shorms with a 70% chance that the number would fall between 10 and 17. However, thet
, 6 hurricanes, 3 major hurricanes, and Cyclone (ACE) Index 66-103 units. NOAA either average, of below-average on the cumulative Index; however, the number of tropical hurricanes, and major hurricanes within a hurricane season is considered occasionally as well. forecasts On December 6, 2010, Tropical Storm Risk (TSR), a public consortium that experts insurance, management seasonal climate forecasting at University College London, issued an extended-range forecast for the 2011 Atlantic hurricane calling for tropical cyclone activity roughly 40% above 1950–2010 average. The team for 15.6 (±4.3) tropical storms, (±3.0) and 4.0 major with cumulative ACE Index 141 (±58). Two days later, Colorado State University issued its first extended-range forecast for the 2011 season. its report, predicted an hurricane with named storms, 9 5 major hurricanes. In addition, the ACE value of approximately 165, citing that El conditions had chance to develop by the start the season. The team also predicted that there a higher chance of a tropical cyclone hitting the United States coastline when compared to released an updated forecast April 4, lowering number predicted by On April 2011, CSU revised their December forecast slightly, predicting 16 named storms, hurricanes, and 5 major hurricanes. On May 19, 2011, NOAA first for the 2011 hurricane season. The organization 12–18 storms, 6–10 hurricanes, and hurricanes form during citing sea surface temperatures, a La Niña, and the effect the warm regime of also stated that, when looking at climate models, comparable to some of the active seasons 1995" could occur. On May 26, the UK Met Office (UKMO) issued forecast of above-average season. They predicted 13 tropical storms with 70% chance that the would fall between 10 and 17. However, they
, 6 hurricanes, 3 major hurricanes, And an AccumUlateD CyCloNe enerGy (ACe) Index of 66-103 units. NoaA tyPically categorizes a seaSon as EiTHer aBOvE-averAge, averAGe, OF BelOw-AvEraGe BAsEd on tHe cUmulatiVe ACE Index; HowEvEr, the number oF TrOpical storMs, hUrricanes, and MajOr hurrIcAneS WithiN a hUrricAne seaSOn is coNsidered oCcASionalLY as well.

pRE-sEasoN forecasts
On DecemBEr 6, 2010, tRopical Storm RiSk (TSR), a PuBLiC COnsOrtIum that comPrIses eXPerts on INsURANce, RIsk management And seasonal CLimAte forEcAstINg at UnIversItY colLege London, iSsueD an extendEd-rangE ForecasT For the 2011 ATlantiC huRriCane SEaSoN, caLlINg fOR tRopICal Cyclone aCtIvIty roUghlY 40% ABOVe thE 1950–2010 avEragE. The tEam called for 15.6 (±4.3) tRopIcal STorMs, 8.4 (±3.0) hurRicanEs, anD 4.0 (±1.7) mAjor hUrricaNes, wiTh A cumulative ACE INdex Of 141 (±58). Two days LatEr, colOrAdo StATe UnivErsIty Issued iTs first EXteNdED-RAnGe forecast for the 2011 seAsON. in Its reporT, the orGAnIzATion predIcTed An abOVE-averAge hURrIcane seaSon witH 17 NaMeD storms, 9 HuRricanEs, And 5 MajOr hurRIcanEs. In adDition, thE team EXpected an ACE vaLUe of approximaTElY 165, CItINg thAt EL Niño conditIons HAd liTtle CHaNce TO deveLop by ThE StARt of the season. The teaM aLso preDicteD that there was A higher chaNCE Of a tropiCal cYClONe hitting the UnIted STates coastLIne when cOmparEd to 2010. TSR rEleased an UPDated forEcaSt oN ApRil 4, LOWeRing the number OF PredIcTed cyclOneS by one. ON ApRil 4, 2011, cSU RevIsEd their DeCember foReCaSt SlIghTly, prEDicting 16 nAmEd sToRms, 9 HurriCAnes, anD 5 majoR hurRiCaNEs.

ON May 19, 2011, NOAa ReLEAsed ThEiR firSt fOrEcast For tHE 2011 AtLantic hUrricane sEasON. The OrGaNizatioN expected 12–18 nameD sTorms, 6–10 hurriCaNes, And 3–6 majOR HurricanEs would form in the AtlantiC During 2011, cItiNg aboVe-noRmal sea suRfaCe tempEraTUres, a wEakeniNg La NIñA, anD THe effECT oF thE wArm regime oF THe ATlantIc MultIdecadaL oscillation. NOAA alSO stAted that, when lOokIng aT CLiMatE MoDEls, "AcTIviTY Comparable to somE of the actiVe SEaSons since 1995" cOUld OcCur. On MaY 26, the UK MEt OffICe (UKMO) iSsued a forEcast of a sLiGhtlY ABovE-average seAson. They Predicted 13 TRopicAL sTorms WitH a 70% chanCe ThaT the nUmber wOUld Fall bEtween 10 AnD 17. HowevEr, theY
, 6 hurricanes, 3 major hu rricanes,and a n A ccu mu late d Cy clone Energy ( A CE)Index of 66-103 units.  NOAA  t y pica l ly  cate gorizes as e aso nas  ei th e rabove -av erage,average, o f b el ow-average b a se d on the c umu lative ACE I nde x; how ev er, the n umb er of  tropi c al sto rms, hurr ic a nes, a n d major h ur rica nes within a hurr i ca n e season is co nsider ed oc c a sio nal ly as well .
Pre- s eason f o re c a s tsO n December 6,  2010, Trop i cal  Storm  R isk (TSR),  a pu bl i c c onsortium t hatcomprises  exper t s on in s urance,  riskman age ment an dsea so n alc li mat e  fo recastin gat  Univ ersi t y C olle geLond on, i ssued an exte nde d-ra n geforec ast f or t he  2011  Atlan tic h ur ricane season,call ing for t rop ic alcy clone activi tyrou ghly 40 % above the  1 9 5 0 –2 010 average. The t ea m ca lled for  15.6( ±4 .3 )  tropica lsto rms, 8 .4 (± 3.0) hu rricanes , and4 .0  ( ±1.7) m aj or hur ri can es,  with a cu mulati ve ACE I ndexo f 141 (±58). T w o days later, Co l o ra d o St ate  University  iss u ed i ts f i rs t e x tende d-ran ge fo r ecast for the 2011se ason.In it s report, the  organizat i o n  predict ed a n  a b ove-average hu rrica ne seasonw ith 17 n amedstorms,9 hurrica n e s, and 5  ma jor  hu rri c a ne s. In additio n ,  the  t eam exp ect ed an A CEval ueofap proximate ly 165,ci ti ng  t hat  El N i ño condi ti ons  h adlittl e  chanc e todeve lo pb y t he star t  o f these as on.The  t eam a lsop red icted t hat there  wa s  a h ig he r chanc e of a tropic al  cyclone h it tin g theU n ited Sta tes coastline when comp a red to201 0. TS R re leased an  up datedfor e cast o n Apri l 4,lo wer i n g the n um ber  o f predicte d cyc lones  b y on e. On A pril 4, 2011, CSUr evi sed their Dec emb er f o r ec ast sl i ght ly ,  pr e d icting 16 named  storms, 9  h u rr icanes, an d  5ma jor hur ricanes .

On May 19,  2011, NO AA releas ed  the i r  fi rst foreca st for t he 2011 A t lanti c  h urric ane  seaso n.  Th e org anizat i onexpec ted 12 –1 8 name d sto rm s, 6–10hurricanes, and 3–6 maj or hur rican eswould for m i n  th e Atlanti c du ring 2011,  ci tin g abo ve- n ormal  sea su rfa c e tem pera t ures, a w e ak eni n g  L a Niña, and t h e e ffect  of the wa rm r egime of the Atla n tic multidecad al o s c ill ati o n. N OA A also statedtha t, w hen look in g at climat e models ," activ ity co mparab le to s o m eo f theacti veseasons s inc e1 995" co ul do ccur.On M ay  26, t he UKM et O f f ice (UKMO) issue d a f o r ecast ofa sli gh tly abo v e-av erage seas on. They pr edicte d 13  trop ical st or ms wit h a  7 0% chancet hat the n umber  wouldfa ll b etw een 10  and 1 7. Ho weve r,  th ey
, 6_hurricanes, 3_major hurricanes, and an_Accumulated Cyclone_Energy_(ACE) Index_of_66-103 units. NOAA_typically categorizes a_season as either above-average,_average, of below-average_based_on the cumulative ACE Index; however, the number of tropical storms, hurricanes, and major_hurricanes_within a_hurricane_season_is considered occasionally as well.

Pre-season_forecasts
On December 6, 2010, Tropical_Storm Risk_(TSR), a public consortium that comprises experts on_insurance,_risk management and_seasonal climate forecasting at University College London, issued an_extended-range forecast for the 2011 Atlantic_hurricane season, calling_for_tropical_cyclone activity roughly 40%_above the 1950–2010 average. The team_called for 15.6 (±4.3) tropical storms,_8.4 (±3.0) hurricanes, and 4.0 (±1.7) major_hurricanes, with a cumulative ACE Index_of 141 (±58). Two days_later, Colorado_State University issued its first_extended-range forecast for_the 2011_season. In its_report, the organization predicted an above-average_hurricane season with_17 named storms, 9 hurricanes, and_5_major hurricanes. In_addition,_the_team expected_an ACE value_of_approximately 165,_citing_that El Niño conditions had little_chance_to develop by the start of the_season. The team also_predicted_that there was a_higher chance of a tropical_cyclone hitting the United States coastline_when compared_to 2010._TSR released an updated forecast on April 4, lowering the number of_predicted cyclones by one. On April_4, 2011, CSU revised_their December_forecast_slightly, predicting 16_named_storms, 9_hurricanes, and 5 major hurricanes.

On May 19, 2011,_NOAA released_their first forecast for the 2011_Atlantic hurricane season. The_organization_expected 12–18 named storms, 6–10 hurricanes,_and 3–6 major hurricanes would form in_the Atlantic during 2011, citing_above-normal_sea_surface temperatures, a weakening La_Niña, and the effect of the_warm regime of_the Atlantic multidecadal oscillation. NOAA also stated_that,_when looking at climate models, "activity_comparable_to some of the active seasons_since_1995"_could occur. On May 26, the_UK Met Office (UKMO) issued a_forecast of a slightly above-average season. They predicted 13 tropical_storms with a_70% chance that the number_would_fall_between 10 and 17. However, they