ハワイ大学天文学研究所の台風情報

http://www.solar.ifa.hawaii.edu/Tropical/
このサイトも以下のような注意書きがあります。

The tropical cyclone data presented at this site are intended to convey only general information on current storms and must not be used to make life or death decisions or decisions relating to the protection of property: the data may not be accurate. If you are in the path of a storm you should be listening to official information sources. These data have no official status and should not be used for emergency response decision-making under any circumstances.
（あくまでも非公式なものであって、公式の情報を入手するべきです。）