12th July 

A Meteorological Note on the Synoptic Situation by Vag. Gokul.

Moist Equatorial Waves at play over the Equatorial Indian Ocean:

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As the equatorial region is convectively active, peninsular India could be temporarily under a relatively drier spell.

Recent satellite based images/analyses and NWP model based real time analyses suggests that transient moist equatorial waves are at play in the equatorial Indian Ocean. An eastward propagating Convectively Coupled Kelvin Wave(CCKW) is seen over the central equatorial Indian Ocean near Maldives that is associated with enhanced atmospheric deep convective clouds. The wave is embedded in a deep Baroclinic large scale environment. The wave is also seen associated with deeper moist column, intense upward motion, high theta-e at mid tropospheric levels, enhanced upper level divergence etc. Also in the vicinity is a mid tropospheric circulation, which could be a high frequency Rossby wave response to the heating. Latest forecasts suggest that this CCKW could interfere with the large enhanced convective envelope over the Maritime Continent.