Bay of Bengal likely to host a tropical depression
Bay of Bengal likely to host a tropical depression
So far, the north Indian Ocean cyclone season has seen eight depressions (low pressure systems with maximum wind speed between 32 and 50 km/hr), five deep depressions (with maximum wind speed between 51 and 59 km/hr), three cyclonic storms (maximum wind speed between 60 and 90 km/hr), two severe cyclonic storms (with maximum wind speed between 90 and 119 km/hr) and two very severe cyclonic storms (cyclones Hudhud and Nilofar).
This means a total of 20 low pressure systems have been recorded in the north Indian Ocean (Arabian Sea and Bay of Bengal) this year. It looks like one more such system may cause the figure to rise before the curtain falls on 2014.
A fresh low pressure system is visible off the shores of Tamil Nadu in the Bay of Bengal. Monday morning’s surface weather map from Thai Meteorological Department suggests that the mean sea level pressure of this low pressure system is about 1,008 millibars. Weather models like Global Forecast System (GFS) continue to show that this system would intensify slightly as it moves close to the eastern coast of India this week.
The winds at the upper level (around 30,000 feet above the sea level) would steer this low pressure system. Hence, this system would threaten the eastern coast of India—coastal areas of Andhra Pradesh, Odisha and West Bengal—between Tuesday and Saturday.
The good news is that the Bay of Bengal will not support its intensification into a cyclone as it is December. The Bay of Bengal or any other sea is usually less productive during the winter months. This is because sea surface temperatures are not high enough for cyclone development. Winter also means lesser moisture is available and hence, low pressure systems find it difficult to intensify into tropical cyclones.
The sea surface temperature (SST) in much of Bay of Bengal right now is around 28°C. When the cyclone season is most active, the SST is as high as 30°C.
According to this model, the system can intensify to the strength of a tropical depression. In their Monday morning update, India Meteorological Department (IMD) said that this system may further concentrate into a depression during the next 48 hours.
What does it mean for the eastern coastal region?
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