Lucknow, June 12 -- Districts across Uttar Pradesh are expected to receive heavy to very heavy rainfall over the weekend, according to a fresh forecast issued by Indian Meteorological Department (IMD) on Friday. Following the forecast, 28 districts of Uttar Pradesh have been put on alert for heavy rainfall, gusty winds and thunderstorms.Lucknow and other districts of central UP will experience rainfall due to a change in weather conditions over the next two days, according to the forecast....