A Broad Low pressure Area in Southwest Bay of Bengal persist and will move close to Tamil Nadu Coast. This will produce good rainfall activity over North coastal Tamil Nadu today and will continue for a couple of days with breaks. Heavy spells would be confined to Thiruvallur, Chennai, Kanchipuram, Pondicherry, Cuddalore, Nagapattinam. Isolated places in Chennai, Tiruvallur, Kanchipuram district will get very heavy rainfall. Light to medium rains would occur in adjoining interior districts such as Vellore, Thiruvannamalai, Vilupuram.
Majority of weather models indicate that the prevailing low pressure area would move towards coastal Andhra Pradesh under the influence of western disturbance creeping into North West India around 13th November. In this scenario, rains will ease across TN by next week mid. With the arrival of Strong western disturbance winter is all set to make onset over north India with first snowfall of season expected around Nov 14th in Jammu & Kashmir and Himalayan regions.
Chennai – Periods of Heavy rains is expected with breaks as temperatures settle at pleasing 27/28C.
Vellore – Showers are expected at times and max temperatures will settle at a pleasant 26C.
Trichy – Mostly cloudy with medium rain possibility with maximum temperature around 31C.
Madurai – Partly cloudy and comfortable with highs of 32C.
Coimbatore – Partly sunny and cloudy with decent warm temperature with high of 31C.
NEM Facts & Figures# 22
The highest 1 day rainfall in Chennai was 550 mm on Oct 21, 1846 followed by 460 mm on Oct 24,1846 . Tambaram registered 494 mm on Dec 2,2015