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The 1920 Atlantic hurricane season featured tropical storms and hurricanes only in the month of September. Although no "hurricane season" was defined at the time, the present-day delineation of such is June 1 to November 30. The first system, a hurricane, developed on September 7 while the last, a tropical depression, transitioned into an extratropical cyclone on October 27. Of note, four of the six cyclones co-existed with another tropical cyclone during the season. Of the season's six tropical cyclones, five became tropical storms and four strengthened into hurricanes. Furthermore, none of these strengthened into a major hurricane—Category 3 or higher on the modern-day Saffir–Simpson hurricane wind scale—marking the seventh such occurrence since 1900.〔 The strongest hurricane of the season peaked as only as a strong Category 2 with winds of 110 mph (175 km/h). The second hurricane caused one death and $1.45 million (1920 USD) in damage in Louisiana, the third left one fatality in North Carolina, and the fifth storm indirectly killed one person in Florida. The season's activity was reflected with an accumulated cyclone energy (ACE) rating of 30. 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. ==Storms== 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:01/08/1920 till:01/11/1920 TimeAxis = orientation:horizontal ScaleMinor = grid:black unit:month increment:1 start:01/08/1920 Colors = id:canvas value:gray(0.88) id:GP value:red id:TD value:rgb(0.38,0.73,1) legend:Tropical_Depression_(TD)_=_<39_mph_(0–62_km/h) id:TS value:rgb(0,0.98,0.96) legend:Tropical_Storm_=_39–73_mph_(63–117 km/h) id:C1 value:rgb(1,1,0.80) legend:Category_1_=_74–95_mph_(119–153_km/h) id:C2 value:rgb(1,0.91,0.46) legend:Category_2_=_96–110_mph_(154–177_km/h) id:C3 value:rgb(1,0.76,0.25) legend:Category_3_=_111–130_mph_(178–209-km/h) id:C4 value:rgb(1,0.56,0.13) legend:Category_4_=_131–155_mph_(210–249_km/h) id:C5 value:rgb(1,0.38,0.38) legend:Category_5_=_>=156_mph_(>=250_km/h) Backgroundcolors = canvas:canvas BarData = barset:Hurricane bar:Month PlotData= barset:Hurricane width:10 align:left fontsize:S shift:(4,-4) anchor:till from:07/09/1920 till:14/09/1920 color:C2 text:"Hurricane #1" (C2) from:16/09/1920 till:23/09/1920 color:C2 text:"Hurricane #2" (C2) from:19/09/1920 till:24/09/1920 color:C1 text:"Hurricane #3" (C1) from:23/09/1920 till:27/09/1920 color:TS text:"Tropical Storm #4" (TS) from:25/09/1920 till:30/09/1920 color:C1 text:"Hurricane #5" (C1) from:20/10/1920 till:27/10/1920 color:TD text:"TD" (TD) bar:Month width:15 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas from:01/08/1920 till:01/09/1920 text:August from:01/09/1920 till:01/10/1920 text:September from:01/10/1920 till:01/11/1920 text:October TextData = pos:(570,30) text:"(From the" pos:(617,30) text:"Saffir–Simpson Hurricane Scale)" 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「1920 Atlantic hurricane season」の詳細全文を読む スポンサード リンク
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