At present, minimums over most places of Karnataka are below normal by 2˚C to 3˚C. In fact, isolated pockets of North Interior Karnataka are also witnessing cold wave conditions such Hassan, which is at present 6 degrees below normal.
Yesterday, minimum temperature recorded over Chitradurga was 12.6˚C which was below normal by 4˚C, followed by Madikeri 9.7/-3, Mysuru 12.6/-3 and Vijayapur 13.5/-3.
Similarly, many districts of Tamil Nadu have also been witnessing below normal night temperatures. Moreover, isolated pockets of Tamil Nadu are also under cold wave condition such as Karaikal which is 5 degrees below normal. Minimum temperature of Salem was 16.1 which was below normal by 4˚C, followed by, Vellore 14.8/-3 and Dharmapuri 14.5/-3. This is also the second occasion that minimums of Karaikal have dropped below 20 degree this season.
This year, the winter chill is more prominent over South Peninsula in comparison to last two to three years. The reason for these below normal temperatures has be attributed to continuous flow of cold winds from north/northeast direction.
Whenever, there is a gap between two successive Western Disturbances, the northerly winds continue for longer duration and reach up to South Peninsula, resulting in drop of temperatures.
This scenario is likely to continue for another 48 hours. Thereafter, we expect wind direction to change from northeast to southeast and minimums will increase by 2˚C to 4˚C, resulting in abatement of cold wave conditions.
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