The
seasonal low found over most
continents in
summer and, to a lesser
extent, over adjacent ocean areas
in winter may be termed as seasonal monsoonal (heat)
low. Usually such Low pressure systems
are responsible for rainfall of a particular place / region. The formation of
small inland vortex due to intense heating of land is evident in south peninsular India during this summer. It attracted moist air from sea [sea breeze] The relation between rainfall and low
pressure system [either over sea or over land] has been established by many. Further
this time the POWER HOUSE of SWM – “The Mascarene High” is not strengthened to
required mark near Mauritius. However another segment of HIGH in south IO is propagating cross equatorial winds and thus the winds become Bay branch of SWM The inland heating over south India and central
India i.e East of 76 Deg E is relatively pronounced. This enables the already set in Bay branch of
SWM winds to surge towards the inland heat low.
In lower latitudes it moved from East to West and gave fairly wide spread rainfall over southern parts of the country.
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