Tamil Nadu coast may be bracing for twin strikes by dissimilar weather systems during this weekend and into the middle of next.
The existing well-marked low-pressure area has intensified one round to a depression on Wednesday.
DEEP DEPRESSION
India Met Department expects it to strengthen another round to a deep depression (just below tropical cyclone status) and cross the coast by Saturday night or Sunday morning.
It has forecast heavy to very heavy rainfall at a few places over north coastal Tamil Nadu on Friday with extremely heavy falls at isolated places.
Heavy to very heavy falls have been warned of at a few places over south coastal Andhra Pradesh as well. Isolated heavy rain will lash Rayalaseema and interior Tamil Nadu.
Outlook for next two days said that rain or thundershowers punctuated by heavy to very heavy falls would break out at many places over Tamil Nadu and south Andhra Pradesh.
SUCCESSOR SYSTEM
Many places over Kerala also may witness moderate to heavy rainfall during this period.
US National Centres for Environmental Prediction persists with the outlook for some rains to radiate further northeast along the cast to Odisha. Meanwhile, a follow-up low-pressure area is forecast to spin up over the Andaman Sea even as the existing depression crosses the Tamil Nadu coast.
A ‘pulse’ from erstwhile killer Pacific typhoon Haiyan is seen as setting up the new ‘low’ in the Andaman Sea.
(The current depression too had taken shape as a ‘low’ in the same area, after crossing in as a pulse from South China Sea typhoon Krosa that pre-dated Haiyan.)
The new ‘low’ is forecast to trek almost a similar path as the current storm, but not perhaps growing to the same strength, and approach coast next week.
FOG IN NORTH
Meanwhile in the North, fog to shallow fog conditions prevailed during the morning hours over parts of Punjab, Haryana, Delhi, Uttar Pradesh, Bihar, Jharkhand and Tripura.
Minimum temperatures are below normal in Himachal Pradesh, Haryana, Utter Pradesh, Bihar, gangetic West Bengal and the Northeastern States.
East Madhya Pradesh, Chhattisgarh, Saurashtra, Kutch, Maharashtra and Telangana too witnessed cooler climes.
Minimum temperatures are below normal by 4 to 6 deg Celsius in interior Odisha and north interior Karnataka. The lowest of 6.6 degree Celsius was reported at Muzaffarnagar in Uttar Pradesh.