In particular, many blog and wiki sites offer their web feeds in the Atom format. A feed reader or aggregator program can be used to check feeds and to display new articles. Client-side readers may also be designed as standalone programs or as extensions to existing programs like web browsers.
Best Answer: a vortex of a tornado is usually referred as devil eye or you can also call it the eye of the tornado. The vortex of a tornado is the area that the tornado revolves around. It is sometimes called the eye of the tornado. The center is very calm and has lower pressure than the surrounding area. Source(s): Geography Course....
1 A whirlwind, whirlpool, or similarly moving matter in the form of a spiral or column.  An extreme version of vorticity is a vortex. The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes.