do basins need to be monitored during a cyclone?
Yes, as most of them form in one of the seven tropical cyclone basins.
Tropical cyclone
The majority of tropical cyclones each year form in one of seven tropical cyclone basins, which are monitored by a variety of meteorological services and warning centres. 
when did typhoon omar take place? In 1992. where did it start? From the monsoon trough in the western Pacific Ocean. what lead it to become a typhoon? Development of a high pressure ridge as Omar moved away from another typhoon. what is a typhoon? It is a mature tropical cyclone that develops between 180° and 100°E in the Northern Hemisphere.
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Tropical cyclone [SEP] Major basins and related warning centers
The majority of tropical cyclones each year form in one of seven tropical cyclone basins, which are monitored by a variety of meteorological services and warning centres. Ten of these warning centres worldwide are designated as either Regional Specialized Meteorological Centre or a Tropical Cyclone Warning Centre by the World Meteorological Organisation's tropical cyclone programme. These warning centres issue advisories which provide basic information and cover a systems present, forecast position, movement and intensity, in their designated areas of responsibility. Meteorological services around the world are generally responsible for issuing warnings for their own country, however, there are exceptions, as the United States National Hurricane Center and Fiji Meteorological Service issue alerts, watches and warnings for various island nations in their areas of responsibility.