New Delhi: Dust storm with strong winds may occur in Delhi-NCR today and there is a possibility of splashing with thunder. The IMD has predicted heavy to very heavy rainfall at isolated places over Nagaland, Manipur, Mizoram, Tripura, Assam, Meghalaya Arunachal Pradesh, Sub-Himalayan West Bengal and Sikkim on May 15 under the influence of Cyclone Mocha. IMD has also issued an Orange Alert regarding this.