What will happen if cyclone and anti-cyclone meet?

Answer 1

If a cyclone, which is a low pressure system, were to meet an anticylone, which is a high pressure system a steep pressure gradient will form between them, resulting in strong winds flowing between the systems. This can be dangerous, especially at sea.

In the northern hemisphere cyclones rotate counterclockwise and anticyclones rotate clockwise. This is reversed in the southern hemisphere. As a result, when a mid-latitude cyclone pulls up on the west side of an anticyclone, the two can essentially work together to pull in tropical air, bringing warm temperatures. If the cyclone is to the east of the anticyclone they can pull in arctic or antarctic air, producing low temperatures.

Finally, a very large anticyclone has the potential to produce a blocking pattern, causing systems which normally move eastward to stop or even move west. A cyclone that stalls behind such a system can produce rain, snow, or severe weather in the same region for days. However in this case a system does not have to directly interact with the blocking high pressure system to be caught in the blocking pattern.