The rain-driving low-pressure area in the Comorin region has intensified one round into being ‘well marked’ on Tuesday, an India Met Department update said.
The national weather forecaster expected it to move North-West and intensify further into a depression by Wednesday.
It has warned that heavy rain will lash Kerala on Wednesday with isolated heavy rainfall at a few places.
Isolated heavy to very heavy rainfall has been forecast for adjoining South Tamil Nadu and South interior Karnataka.
Squally winds reaching up to 50 km per hour is likely to prevail along the coasts of Kerala, Tamil Nadu and Lakshadweep Islands. Fishermen have been asked not to venture out into the sea.
International models surveyed suggested that the weather system in the coastal sea surrounding the peninsula may not strengthen further thanks to proximity of land.
The prospective depression is shown as climbing along the Kerala coast up to Mangalore from where it might enter land, weaken, and traverse North and North-East across peninsula. Rain or thundershowers will break out over many places of Kerala, Karnataka, and Andhra Pradesh during this phase at a few places over the rest of the peninsula right until the weekend. The rain intensity may reduce thereafter, but thundershowers may continue to prevail over much of the peninsula.
After precipitating rain in this manner, the remnant of the weather system might slip into the Bay of Bengal, which, according to predictions by at least two US-based models, might regenerate into a fresh ‘low.’ Focus of weather watchers will thus shift into the Bay where these US models say condition could become favourable for potential tropical cyclone development.