eastern region oil spill disaster contingency plan - Indian Coast Guard

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over land and over Bay of Bengal the speed is about 10-15 kts except over the
central parts of Bay where it may reach to more than 15kts.
48. Low Pressure systems/ Cyclones. During this month, Low
pressure Areas and Depressions form over Bay of Bengal at relatively southerly
latitudes than in July or Aug. Most of the cyclonic disturbances originate in the
area North of 15 Deg North and west of 90 Deg East. The more favorable region,
for the formation of disturbance is West Central Bay off coastal Andhra Pradesh.
Some storms originating in China sea travel across South China and enter the
Bay very few of them intensify into cyclonic storms but they are generally of
slight intensity. The frequency of formation of Cyclonic storm and Depressions
per year is 0.39 and 0.75 respectively. During this month, Low pressure Areas
and depressions initially move in westerly to northwesterly direction and later on
recurve in N/NEly direction. Their recurving may, at times, result in the
termination of the SW Monsoon in the NE and Central parts of the country.
49. Withdrawal of SW Monsoon: Normally, withdrawal of SW Monsoon
starts from West Rajasthan and adjoining areas of Pakistan during the first week
of September. By the end of the month, it completely withdraws from the
Northwestern and Central parts of the country comprising of Rajasthan, Haryana,
Punjab, Himachal Pradesh, Jammu & Kashmir, Gujarat, Coastal Maharashtra,
Western parts of Madhya Pradesh and Uttar Pradesh. The normal dates of
withdrawal of SW monsoon is given at enclosure VI.
50. Currents in Bay of Bengal. South of 15 Deg North and East of 85 Deg
East, the direction of the surface current is east wards to ENE Wards south of 15
Deg North and West of 85 Deg East, the direction of current is variable. The
strength of these currents are expected to be on higher side of about Y2 Kt at
lower latitudes than at higher latitudes (of about 114 kt) north Of 15 Deg North,
the anticlockwise gyre will be well established as compared to the preceding
months of this season. The western part of the gyre will be well established as
compared to the preceding months of this season. The western part of the gyre
which graces the coastal West Bengal, Orissa and Andhra Pradesh coast is
expected to have strength of 1/2 to 3/4 Kt and flows mainly from NEly direction.
While the eastern part of it flows towards NE to Nly direction with speed of the
order of 1/4 to 1/2 Kt.
October