Panchkula, Oct 9 (UNI) The India Meteorological Department (IMD) on Friday warned of thunderstorms, lightning and gusty winds reaching 50 kmph across isolated parts of Punjab, Haryana, Chandigarh and Delhi on October 10 and 11, while forecasting rainfall at isolated locations in the region until October 14 and heavy showers in Uttarakhand and several southern states.