Rare February system likely to bring heavy rain to parts of south T.N. on February 21 and 22

The Bay of Bengal has witnessed lone 5 upwind systems that intensified into a slump successful February since 1891. This year’s February low-pressure country is expected to go much marked and could bring isolated dense rainfall to parts of confederate Tamil Nadu connected February 21 and 22.

The low-pressure country that has formed implicit eastbound equatorial Indian Ocean and the adjoining cardinal parts of southbound Bay of Bengal is apt to go much marked implicit southwest Bay of Bengal and the adjoining eastbound equatorial Indian Ocean by February 18.

Citing records of cyclones and slump tracks, B. Amudha, Head, Regional Meteorological Centre (RMC), said the astir caller upwind systems during February were seen successful 1961, 1999, and 2011. However, nary of these further developed into a cyclone.

February typically records precise fewer rainy days and debased rainfall totals crossed galore districts. For instance, successful Kanniyakumari district, the mean February rainfall is lone 7.9 mm, with a mean of conscionable 0.7 rainy time during the month. Similarly, Nagapattinam territory gets an mean rainfall of 13 mm, with a mean of 0.8 day. Nungambakkam successful Chennai excessively receives mean rainfall of 5.5 mm, with lone fractional a rainy day. However, determination person been occasions erstwhile these districts recorded much than their mean rainfall during this period.

Officials of the India Meteorological Department (IMD), New Delhi, said portion the enactment of a low-pressure country successful February was not uncommon, the upwind strategy intensifying into a slump was uncommon and specified systems mostly impacted Sri Lanka. Large standard atmospheric features, including Madden-Julian Oscillation, tin besides power unreality screen and rainfall successful the southbound Bay of Bengal and eastbound Equatorial Indian Ocean. The existent February strategy is apt to bring rainfall implicit Sri Lanka and parts of Tamil Nadu and Kerala, officials said.

V.R. Durai, Director, Area Cyclone Warning Centre, RMC, Chennai, said a beardown somesthesia anomaly persisted successful the eastbound equatorial Indian Ocean. Warm oversea aboveground somesthesia successful the portion this clip had favoured enactment of a low-pressure area. However, the strategy is being monitored for further intensification. The RMC has forecast a anticipation of bedewed spell successful south-coastal Tamil Nadu and delta districts betwixt February 19 and 22. “We person predicted isolated dense rainfall successful immoderate delta and southbound Tamil Nadu districts, going by the upwind models,” Mr. Durai added.