The MET department has issued warning about the thunderstorm accompanied by hailstorm at some places of the country over next three to four days. Talking to AIR, Director General of IMD, L S Rathore said, a western disturbance is active over the North west India which will cause thunderstorm with strong winds and isolated hailstorm.<br/><br/>IMD warning says in Bihar, Jharkhand and Gangetic West Bengal thunderstorm and hailstorm will occur on 13th & 14th of this month. Met department has issued advisory to the farmers to undertake harvesting of matured crops at the earliest and postpone irrigation. They have also been advised to keep harvested produce in safer place and maintain proper drainage channels.