IMD is Indian Meteorological Department it is a government agency which deals in matters related to meteorology, seismology and allied subjects,it provides information for optimum functioning of weather related activities like agriculture,irrigation,shipping and aviation.
It also warns against severe weather phenomena like cyclones,heavy rains,cold and heat waves which are causes of destruction of life and properties,IMD was established since 1875.
How to get weather information for your city:-
IMD has made it really very easy to get the weather information for your city using a toll free number ,just dial 18001801717 and follow the IVR instructions,dial 1 and then input your city code to hear the weather information,
You can get the city codes here dialcode.org/Asia/India/(Consider the area codes ,not the dial codes).
IMD has also recently started an sms alert service for sms based weather alerts on Thursday, This service is meant for general public for dissemination of weather and disaster related information,under this IMD Will send sms to individuals who register on the site with the information for natural calamities, it will also suggest the action needed to be taken by authorities and people.