Shimla, May 24 (UNI) The local Meteorological Centre has issued a yellow warning for thunderstorms, accompanied by lightning and gusty winds ranging from 40–50 kmph, for May 25 and 26 in seven districts of Sirmaur, Solan, Shimla, Mandi, Kullu, Kangra, and Chamba — and for all 12 districts on May 27 and 28.