eastern region oil spill disaster contingency plan - Indian Coast Guard

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(ii) The pressure over most parts of the country are above normal
except over Southeastern Peninsula and Northern India extending
from Punjab to Northeast India.
(iii) Establishment of an area of relatively high pressure over
Western India.
(iv) The surface winds become SW to WSWly over entire parts of
the country including sea areas during a break monsoon.
d) Termination of Breaks. The Break Monsoon conditions generally
terminate with the formation of a low or depression over Southwest and
adjoining West Central Bay. The axis of the monsoon trough swings
southward to its normal position and the rainfall activity over the country
once again revives.
44. Currents in the Bay of Bengal. During this month an anti-clockwise
gyre forms at the Head Bay. The currents off Orissa North Andhra Pradesh coast
are from SWly to Sly with the length of l/4 to 1/2 Kt. However, the currents off
Tamil Nadu South Andhra Pradesh coast have a tendency to be directed to and
NEly direction with the strength of 1/4 to 1/2 to 3/4 kt. In Central Bay, current
mainly flows along ENEly direction with average strength of 1/2 Kt.
45. Sea State. Sea state is generally 3-4 over Bay of Bengal. Sea State
may increase to 4 to 5 during the formation of Low-pressure area/depression
over Head Bay. Off and along East, south of Gopalpur latitude the Sea State is of
the order of 3.
September
46. General: September is the last month of the South West Monsoon
season for the country. By the first half of this month, the SW Monsoon starts
withdrawing from the northwestern parts of the country. As a result of general
decreases in the cloudiness over most parts of the country the day temperatures
start rising except over Andaman and Nicobar Islands where September is the
month of lowest maximum temperatures. Thunderstorm activity over the north
peninsula increases during this month since the East West oriented trough line
passes through latitudes.
47. Sea Level Pressure &. Wind. Pressure gradient starts weakening
during the month and accordingly the surface winds start weakening over land
as well as over sea areas. The average speed of surface wind is about 05-10 kts