Representational Image.

(Jipson Sikhera)

Thursday, June 2: After the first batch of monsoonal rains graced South India last week, the region was set to begin June by experiencing light to moderate showers. However, the India Meteorological Department’s (IMD) latest bulletin has indicated that the intensity of the rainfall might increase, starting today.

Its forecast indicates that the monsoonal westerly winds blowing in from the Arabian Sea and on to south peninsular India are likely to produce the following weather activity:

• Widespread light to moderate rains with thunderstorms and lightning over Kerala, Mahe and Lakshadweep for the next five days

• Scattered to fairly widespread rainfall over Karnataka until Monday, June 6

• Isolated to scattered showers over Andhra Pradesh, Telangana, Tamil Nadu, Puducherry and Karaikal until Monday

• Isolated heavy rainfall over Tamil Nadu and South Interior Karnataka on Thursday and over Kerala and Mahe on Thursday and Friday

In fact, The Weather Company’s met team has indicated that localised heavy rains exceeding 50mm/day are possible over Tamil Nadu and South Interior Karnataka on Thursday and over Kerala-Mahe till Friday.

Five days precipitation accumulation from Thursday to Monday. (TWC Met Team)

Five days precipitation accumulation from Thursday to Monday.

(TWC Met Team)

In view of these forecasts, the IMD has issued a yellow watch over Kerala, Tamil Nadu, South Interior Karnataka, Andhra Pradesh and Telangana for Thursday, so as to urge the locals to “be updated” about the inclement weather.

Squally winds (speeds 40-60 kmph) may also prevail across these coastal regions until next Monday, June 6. The local fisherfolk have accordingly been advised against venturing into the sea for the duration.

Meanwhile, the northern limit of the Southwest Monsoon currently runs across the central Arabian Sea, central Karnataka, northern parts of Tamil Nadu and southwest-northeast Bay of Bengal.

From here on, it is expected to progress further into the remaining parts of Tamil Nadu, Karnataka, the central Arabian Sea, and the south, central and northeast Bay of Bengal during the next 2-3 days.

The IMD announces the monsoon onset over a state when 60% of its accessible weather stations record 2.5 mm or more rainfall for two consecutive days after May 10. The technical parameters for wind field and outgoing longwave radiation must also be met in conjunction with this burst of rainfall activity.

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