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The 1998 Pacific typhoon season has no official bounds, but most tropical cyclones tend to form in the northwestern Pacific Ocean between May and November.〔http://www.typhoon2000.ph/garyp_mgtcs/may03sum.txt 〕 These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean. The scope of this article is limited to the Pacific Ocean, north of the equator and west of the international date line. Storms that form east of the date line and north of the equator are called hurricanes; see 1998 Pacific hurricane season. Tropical Storms formed in the entire west Pacific basin were assigned a name by the Joint Typhoon Warning Center. Tropical depressions in this basin have the "W" suffix added to their number. Tropical depressions that enter or form in the Philippine area of responsibility are assigned a name by the Philippine Atmospheric, Geophysical and Astronomical Services Administration or PAGASA. This can often result in the same storm having two names. The 1998 season was very weak compared to the 1997 season; this was due to the strong El Niño in the previous season. During the 1998 season, a total of 27 tropical depressions developed across the western Pacific basin. Of those 27 depressions, a total of 18 strengthened into tropical storms of which 9 further intensified into typhoons. The first tropical cyclone developed on July 6, marking the latest start to any Pacific typhoon season on record, and the last one dissipated on December 22. The Philippine region also set a record: with only eleven storms forming or moving into its area of responsibility, PAGASA had its quietest season as of 2006.〔(【引用サイトリンク】title=Most and least annual average number of tropical cyclone occurrence in the PAR )〕 ==Storms== ImageSize = width:800 height:205 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:01/07/1998 till:31/12/1998 TimeAxis = orientation:horizontal ScaleMinor = grid:black unit:month increment:1 start:01/07/1998 Colors = id:canvas value:gray(0.88) id:GP value:red id:TD value:rgb(0.38,0.73,1) legend:Tropical_Depression_=_<62_km/h_(<39_mph) id:TS value:rgb(0,0.98,0.96) legend:Tropical_Storm_=_63-88_km/h_(39-54_mph) id:ST value:rgb(0.80,1,1) legend:Severe_Tropical_Storm_=_89-117_km/h_(55-73_mph) id:C1 value:rgb(1,1,0.80) legend:Category_1_=_119-153_km/h_(74-95_mph) id:C2 value:rgb(1,0.91,0.46) legend:Category_2_=_154-177_km/h_(96-110_mph) id:C3 value:rgb(1,0.76,0.25) legend:Category_3_=_178-209-km/h_(111-130_mph) id:C4 value:rgb(1,0.56,0.13) legend:Category_4_=_210-249_km/h_(131-155_mph) id:C5 value:rgb(1,0.38,0.38) legend:Category_5_=_≥250_km/h_(≥156_mph) Backgroundcolors = canvas:canvas BarData = barset:Hurricane bar:Month PlotData= barset:Hurricane width:10 align:left fontsize:S shift:(4,-4) anchor:till from:06/07/1998 till:11/07/1998 color:TD text:"Akang" from:07/07/1998 till:12/07/1998 color:TS text:"Nichole" from:22/07/1998 till:26/07/1998 color:TD text:"03W" from:01/08/1998 till:05/08/1998 color:C3 text:"Otto" from:05/08/1998 till:12/08/1998 color:ST text:"Penny" from:22/08/1998 till:09/09/1998 color:C4 text:"Rex" barset:break from:31/08/1998 till:06/09/1998 color:TD text:"07W" from:10/09/1998 till:16/09/1998 color:ST text:"Stella" from:12/09/1998 till:14/09/1998 color:TD text:"09W" from:14/09/1998 till:20/09/1998 color:C4 text:"Todd" from:16/09/1998 till:23/09/1998 color:C2 text:"Vicki" from:16/09/1998 till:19/09/1998 color:TD text:"12W" barset:break from:18/09/1998 till:21/09/1998 color:TS text:"Waldo" from:24/09/1998 till:02/10/1998 color:C1 text:"Yanni" from:02/10/1998 till:05/10/1998 color:TD text:"15W" from:04/10/1998 till:07/10/1998 color:TD text:"16W" from:05/10/1998 till:07/10/1998 color:TD text:"17W" from:07/10/1998 till:18/10/1998 color:C5 text:"Zeb" barset:break from:10/10/1998 till:12/10/1998 color:TD text:"Alex" from:13/10/1998 till:28/10/1998 color:C4 text:"Babs" barset:break from:10/11/1998 till:15/11/1998 color:TS text:"Chip" from:16/11/1998 till:20/11/1998 color:TS text:"Dawn" from:23/11/1998 till:26/11/1998 color:TS text:"Elvis" from:07/12/1998 till:14/12/1998 color:C2 text:"Faith" from:08/12/1998 till:13/12/1998 color:TS text:"Gil" from:17/12/1998 till:19/12/1998 color:TD text:"26W" barset:break from:18/12/1998 till:22/12/1998 color:TD text:"27W" bar:Month width:5 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas from:01/07/1998 till:01/08/1998 text:July from:01/08/1998 till:01/09/1998 text:August from:01/09/1998 till:01/10/1998 text:September from:01/10/1998 till:01/11/1998 text:October from:01/11/1998 till:01/12/1998 text:November from:01/12/1998 till:31/12/1998 text:December 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「1998 Pacific typhoon season」の詳細全文を読む スポンサード リンク
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