With reference to Tamilnadu, Nisha : 2008 is similar as P: 2015. Then P points out to :
Nisha:2008 and (P) means Roanu: 2015. both are the cyclone which hit the Indian southern state Tamilnadu .
Nisha Cyclon also known as the Cyclonic Storm Nisha. It was formed 25 November 2008, It was the seventh tropical cyclone in the Bay of Bengal and ninth tropical cyclone of the 2008 North Indian Ocean that year.
Roanu Cyclone hit the Tamilnadu State which was formed last year 09th November 2015.