IMD Update: Low-pressure area forms over Bay, parked off to Tamil Nadu & south AP
Heavy rain is forecast to continue to lash at isolated places over Tamil Nadu, Puducherry & Karaikal; Kerala &Mahe; Coastal Andhra Pradesh & Yanam; Rayalaseema; and South Interior Karnataka on Wednesday in the wake of formation of a low-pressure area over south-west Bay of Bengal on Monday, as predicted by India Meteorological Department (IMD).
Thunderstorms and lightning are likely at isolated places over these meteorological subdivisions while squally weather featuring winds speeding to 35-45 km/hr and gusting to 55 km/hr may prevail over parts of the south-west Bay; along and off the Sri Lanka, Tamil Nadu and south Andhra Pradesh coasts; the Gulf Of Mannar; and adjoining Comorin area.The 24 hours ending on Tuesday morning saw moderate to heavy rain in Tamil Nadu with Zone 14 Perungudi in Chennai district recording 8 cm, the IMD said.
Evening cloud cover
Satellite pictures showed clouds spread out over coastal Odisha coastal Andhra Pradesh to Telangana; north and south interior Karnataka; north Kerala, Rayalaseema; north Tamil Nadu, covering a swathe from Padmapur, Khammam, Rajamahendravaram, Eluru, Vijayawada, Machilipatnam, Chirala, Ongole, Kavali, Nandyal, Proddatur, Anantapur, Kadapa, Hindupur, Tumakuru, Chikkaballapur, Bengaluru, Mysuru, Krishnagiri, Vellore, Kanchipuram, Chennai, Tiruvannamalai, Salem and Cuddalore.
Isolated heavy rain
Isolated heavy rain may break out over Tamil Nadu for four days until Saturday; for five days from Wednesday over Kerala & Mahe; on Tuesday and Wednesday over Rayalaseema; on Wednesday and Thursday over South Interior Karnataka; and for three days until Thursday over Coastal Andhra Pradesh & Yanam.
Light to moderate rain, isolated thunderstorms and lightning may strike at a few places over Tamil Nadu, Puducherry & Karaikal; Coastal Andhra Pradesh & Yanam; and Rayalaseema for four days until Saturday.
Western disturbances heading in
Towards the north of the country, a fresh western disturbance is likely to affect the hills of north-west India from Thursday. These disturbances bring cooler westerlies to north-westerlies into play over north-west India and help modulate ambient winter weather over the region depending on their intensity and moisture carry.
Min, max temperatures
Minimum temperatures were markedly above normal (5.1°C or more) at isolated places over Punjab, Uttar Pradesh, Haryana-Chandigarh-Delhi, Bihar and West Rajasthan as clouds brought in by the western disturbance did not allow solar radiation to escape into the atmosphere.
The lowest minimum (night) temperature of 13.2°C was reported at Mandla in East Madhya Pradesh. On the other hand, maximum temperatures were above normal (3.1°C to 5.0°C) at isolated places over parts of North-West India, with Rajkot (Saurashtra & Kutch) recording the highest at 37.8℃ on Monday.