PINAKI MAJUMDAR   Jamshedpur, April 8:  A cyclonic circulation in the upper troposphere caused by a western disturbance would trigger thundershowers and lightning activity over various parts of Jharkhand during the next 72 hours. Weathermen said the western disturbance as a cyclonic circulation over northwest Uttar Pradesh at 3.1 km above mean sea level with the … Continue reading Jharkhand Weather: Cyclonic circulation to result in rainfall activity over state in next 72 hours