Thunderstorms leave TN; closing act may play out over Kerala February 23, 2021 Rain, snow, hail over Himalayan hills Thunderstorms seem to have significantly calmed down over Tamil Nadu overnight into this (Tuesday) morning with both India Meteorological Department (IMD) and the European Centre for Medium-Term Weather Forecasts (ECMWF) indicating that residual activity, if any, would be confined to Kerala into the rest of this week. The US National Centres for Environmental Prediction too agreed but expected the southern parts of the Bay of Bengal to get restive back again during the first week of March likely buffeting Sri Lanka with a fresh wave of rainfall which may get amplified to cover the southern parts of Kerala and Tamil Nadu as well.