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The 1964 Atlantic hurricane season featured the highest number of U.S. landfalling-hurricanes since 1933.〔 The season officially began on June 15, and lasted until November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. The season was slightly above average, with twelve total storms and six hurricanes. All of the hurricanes strengthened into major hurricanes, an event that had not occurred since 1930. The first system, an unnamed tropical storm, developed on June 2, almost two weeks before the official start of the season. Striking Florida on June 6, the storm brought localized flooding to portions of Cuba and the Southeastern United States, leaving about $1 million in damage. The next storm, also unnamed, developed near the end of July; it did not impact land. The effects of Hurricanes Cleo, Dora, and Isbell combined were devastating to Florida. Cleo also brought destruction to portions of the Caribbean, especially Guadeloupe and Haiti. After moving inland, Cleo brought flooding to states such as Virginia. Overall, the storm caused 219 deaths and about $187.5 million in damage. Dora lashed much of North Florida and southeastern Georgia with hurricane-force winds, leaving five fatalities and around $280 million in damage. In October, Isbell brought strong winds and several tornadoes to Florida, as well as flooding to Cuba and The Carolinas. Isbell killed seven people and left approximately $30 million in damage. The strongest tropical cyclone of the season was Hurricane Hilda, a powerful Category 4 hurricane that devastated portions of the Gulf Coast of the United States, especially Mississippi and Louisiana. Upon striking the latter as a Category 3, Hilda brought heavy rainfall, strong winds, tornadoes, and coastal flooding. Many other areas of the Southern United States experienced flooding from Hilda and its remnants. Overall, Hilda caused 38 deaths and about $126 million in damage. The names Cleo, Dora, and Hilda were retired following the season. Collectively, the tropical cyclones resulted in 270 fatalities and approximately $609.5 million in damage. ==Season summary== ImageSize = width:800 height:200 PlotArea = top:10 bottom:80 right:20 left:20 Legend = columns:3 left:30 top:58 columnwidth:270 AlignBars = early DateFormat = dd/mm/yyyy Period = from:01/06/1964 till:01/12/1964 TimeAxis = orientation:horizontal ScaleMinor = grid:black unit:month increment:1 start:01/06/1964 Colors = id:canvas value:gray(0.88) id:GP value:red id:TD value:rgb(0.38,0.73,1) legend:Tropical_Depression_=_<39_mph_(0–62_km/h)_(TD) id:TS value:rgb(0,0.98,0.96) legend:Tropical_Storm_=_39–73_mph_(63–117 km/h)_(TS) id:C1 value:rgb(1,1,0.80) legend:Category_1_=_74–95_mph_(119–153_km/h)_(C1) id:C2 value:rgb(1,0.91,0.46) legend:Category_2_=_96–110_mph_(154–177_km/h)_(C2) id:C3 value:rgb(1,0.76,0.25) legend:Category_3_=_111–129_mph_(178–208_km/h)_(C3) id:C4 value:rgb(1,0.56,0.13) legend:Category_4_=_130–156_mph_(209–251_km/h)_(C4) id:C5 value:rgb(1,0.38,0.38) legend:Category_5_=_≥157_mph_(≥252_km/h)_(C5) Backgroundcolors = canvas:canvas BarData = barset:Hurricane bar:Month PlotData= barset:Hurricane width:11 align:left fontsize:S shift:(4,-4) anchor:till from:02/06/1964 till:11/06/1964 color:TS text:One (TS) from:28/07/1964 till:02/08/1964 color:TS text:Two (TS) from:05/08/1964 till:08/08/1964 color:TS text:Abby (TS) from:07/08/1964 till:10/08/1964 color:TS text:Brenda (TS) from:20/08/1964 till:05/09/1964 color:C4 text:Cleo (C4) from:28/08/1964 till:14/09/1964 color:C4 text:Dora (C4) barset:break from:04/09/1964 till:15/09/1964 color:C3 text:Ethel (C3) from:05/09/1964 till:10/09/1964 color:TS text:Florence (TS) from:13/09/1964 till:24/09/1964 color:C4 text:Gladys (C4) from:28/09/1964 till:04/10/1964 color:C4 text:Hilda (C4) from:08/10/1964 till:16/10/1964 color:C3 text:Isbell (C3) from:05/11/1964 till:10/11/1964 color:TS text:Twelve (TS) barset:break bar:Month width:5 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas from:01/06/1964 till:01/07/1964 text:June from:01/07/1964 till:01/08/1964 text:July from:01/08/1964 till:01/09/1964 text:August from:01/09/1964 till:01/10/1964 text:September from:01/10/1964 till:01/11/1964 text:October from:01/11/1964 till:01/12/1964 text:November TextData = pos:(570,30) text:"(From the" pos:(617,30) text:"Saffir–Simpson hurricane wind scale)" The Atlantic hurricane season officially began on June 15, 1964. It was a slightly above average season in which twelve tropical storms formed, compared with the 1950–2000 average of 9.6 named storms. Six of these reached hurricane status, which is near the 1950–2000 average of 5.9.〔 All six of the hurricanes reached major hurricane status – well above the 1950-2000 mean of 2.3 per season.〔 Prior to the season, National Hurricane Center Director Gordon Dunn noted that the probability of a hurricane striking the United States was "astronomical." Four hurricanes and three tropical storms made landfall during the season, causing at least 270 deaths and $609.5 million in damage. Tropical Storm Brenda and Hurricane Gladys also caused damage and fatalities, but neither struck land.〔 * * * * * (【引用サイトリンク】title="El Mundo", Havana, October 14, 1964 (Isbell) )〕 The season officially ended on November 30, 1964.〔 The first system, an unnamed tropical storm, developed on June 2, 13 days before the start of the season.〔 It struck Florida as a tropical depression and then strengthened into a tropical storm while out at sea. The storm ceased to exist on June 11. Thereafter, the season went dormant for nearly seven weeks, as the next cyclone, another unnamed storm, did not form until July 28. Tropical cyclogenesis increased in August, which had four tropical cyclones, Abby, Brenda, Cleo, and Dora. Four additional storms originated in September, including Ethel, Florence, Gladys, and Hilda. The strongest storm of the season, Hilda, peaked with maximum sustained winds of 150 mph (240 km/h) and a minimum barometric pressure of . Hurricane Isbell was the sole tropical cyclone in the month of October. The final system, another unnamed storm, existed developed on November 5 and dissipated on November 10, about 20 days before the end of the season.〔 The season's activity was reflected with an accumulated cyclone energy (ACE) rating of 170. ACE is, broadly speaking, a measure of the power of the hurricane multiplied by the length of time it existed, so storms that last a long time, as well as particularly strong hurricanes, have high ACEs. It is only calculated for full advisories on tropical systems at or exceeding 39 mph (63 km/h), which is tropical storm strength. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1964 Atlantic hurricane season」の詳細全文を読む スポンサード リンク
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