India, Dec. 1 -- Two extremely rare cyclones in November devastated parts of Sri Lanka, Indonesia, Malaysia and Thailand, killing nearly 1000 people. While meteorologists are taken aback by the unusual location of their genesis, climate scientists are seeing a clear global warming signature.

Cyclone Senyar emerged as a low pressure area over the Strait of Malacca and the adjoining South Andaman Sea on November 22. On November 26, Cyclone Senyar developed over the Strait of Malacca and adjoining Northeast Indonesia. It moved west-southwestwards and crossed Northeast Indonesia around. Interestingly, Senyar gradually recurved south-eastward and emerged back into Malacca Strait. Then while moving nearly eastwards, entered into Malaysia on No...