文件:1999 Sydney hailstorm radartwocells.png

	本作品受到（或推定受到）著作权保护以及没有标明授权条款，不属于Wikipedia:合理使用 § 图像或Wikipedia:合理使用 § 声音剪辑中任何一项可以接受的内容分类，也不属于Wikipedia:档案著作权标志/非自由授权当中任何一种特定的非自由内容条款。然而，有鉴于本作品用于： 描述所引述的主题； 无任何自由授权代替品可用或可用以提供对等讯息； 用于非营利组织维基媒体基金会营运并存放于美国服务器之中文维基百科； 因而符合美国著作权法或当地著作权法的合理使用原则。将本图用于维基百科或以外之其他用途，可能会侵犯著作权。请参考Wikipedia:合理使用与Wikipedia:著作权信息。 Fair use //zh.wikipedia.org/wiki/File:1999_Sydney_hailstorm_radartwocells.png true
致上传者： 每次使用本图时，应对每个条目分别建立一份详细的合理使用依据，其中必须声明遵守其他非自由内容的相关规定，以及作品来源与著作权资讯。 有关于合理使用依据的范例，请参考这里。 Template:Non-free use rationale可能有助于说明理由。 此标签不是合理使用的充分声明。 致巡查员与管理员：如果本档案拥有一份合适的合理使用依据，请在本授权模板增加|image has rationale=yes参数语法。

I believe this image is justifiable in use as "fair use" under United States law because:-

• It demonstrates an historical event where the image is integral to the article (or section therein).
• No free alternative could be created, as this was a radar image and any derivative would still be fair use and not licensed freely.
• The image does not inhibit the creator (the Bureau of Meteorology, operated by the Government of Australia) to make a profit (as a government agency, its purpose is to provide information to the public).
• The use of this image is in line with the intention of the Bureau of Meteorology's operation - to educate, warn, and protect.
• The image is an official radar image, where the contents and operation of the body that created it (Bureau of Meteorology) is integral both to the event and discussion of the event as presented in an encyclopedia article. The radar image and its use to warn citizens is immediately discussed in the article (or section therein), and hence qualifies for fair use because it is integral to this section of text.

Source: http://www.bom.gov.au/weather/nsw/sevwx/14april1999.shtml