Arabian sea LOW "92A" is still active, S-S-W of Gujarat... Showers expected to start from tomorrow noon.

Climate change will make India hotter, bring heavier rain... http://ow.ly/3cWTq

In this North-East monsoon season so far... Tirunelveli district (Tamilnadu) has received very less rainfall.

Chennai - and Entire tamilnadu are in for widespread heavy showers from evening of 23-Nov till 27-Nov-2010. Due to easterlies and LOW.

Chennai - More showers expected thru the night and into early morning of 21-Nov.

Chennai - sharp shower lashing saidapet zone for the past 15 min now 4:04pm

3pm, Heavy showers again over S, central Kerala and over S.tip of Tamilnadu ... http://ow.ly/i/5F4H

RT @krishashok: http://ping.fm/FPs4I - Rain in Eraniel, Nagercoil. (2:38pm)

RT @krishashok: http://ping.fm/Y2gmY - The tastiest kind of banana in the known universe-Matti pazham (inspiration for new Airtel logo)

RT @pradeep_j: @weatherofindia - its raining + sun shining in Pondicherry (2:45pm)

RT @rpsendhil: http://ping.fm/c2Epd Chennai Rain

RT @madarasee: Something wrong with the chennai sewage system today? Rain water smelling badly everywhere!!!

Update on "92 A" ... an active N. Arabian sea LOW ... http://ow.ly/3cUl0

Heavy showers on way for S, S-W Gujarat on 22-Nov.. due to LOW "92A" .. http://ow.ly/3cUkH

IMD-GFS :: on 24-Nov, Easterly wave over N. TN coast and Low circulation just South of S. tamilnadu.. http://ow.ly/i/5EUe

Update on "92 A" ... an active N. Arabian sea LOW

Position :: 17.5 N , 60 E
wind :: 30 kmph
Pressure :: 1010 mb

Satellite shot
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GFS model
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IMD-GFS model predicts a S-W. Gujarat landfall of the system without much intensification.
Landfall predicted on 22-Nov-2010.
Heavy rain forecast for this region from 22-Nov-2010 to 24-Nov-2010.

An easterly wave is expected to touch Central and N. Tamilnadu from evening of 23-Nov... along with a low circulation near S. Tamilnadu.

Today, a weak low circulation still persists over S. Bay ... http://ow.ly/i/5ESi

Min temp. have fallen by 2 to 3 deg C over Rajasthan, Punjab, Haryana, Delhi, Uttarakhand, Himachal Pradesh, Uttar Pradesh,E. Madhya Pradesh

warning valid for Saturday and Sunday said that isolated heavy rainfall would occur over south Tamil Nadu and Kerala.

La Nina might last for entire 2011 and even into 2012 ... http://ow.ly/3cU4O

RT @fultofaltu: http://ping.fm/bEvee - Heavy rain in egmore, chennai (11:08am)

Chennai - More moisture is being pushed in from Bay from N-E direction... and more showers predicted till evening.

Chennai - 2 to 3 massive showers crossed central chennai, south and S-W from 7:30am till 12pm... No showers yet over N-W suburbs.

RT @ecogeek: Using Bacteria to Heal Cracked Concrete http://bit.ly/d2FUVS

RT @fabwrite: Its pouring in Mandaveli... looks like the North East Monsoon has finally arrived !!! @weatherofindia (7:31am)

Widespread rain over TN, Kerala

A weather warning valid for Saturday and Sunday said that isolated heavy rainfall would occur over south Tamil Nadu and Kerala.

Widespread rainfall has occurred over Tamil Nadu and Kerala during the 24 hours ending Friday morning ahead of an easterly wave action expected to be triggered along the Tamil Nadu coast from Saturday.

All the same, the freak weather masterminded by the Arabian Sea along the West Coast persisted, with fairly widespread rain being reported over as far as Himachal Pradesh and Uttarakhand.

It was scattered over Madhya Pradesh, Vidarbha, South Andhra Pradesh, Coastal Karnataka and Jammu and Kashmir, an update from India Meteorological Department (IMD) said.

MERCURY DOWN

Meanwhile, minimum temperatures have fallen by 2 to 3 deg Celsius over Rajasthan, Punjab, Haryana, Delhi, Uttarakhand, Himachal Pradesh, Uttar Pradesh and East Madhya Pradesh during past 24 hours with some of the clouds clearing off.

However, they still continue to remain above normal by 4 to 6 deg Celsius over these regions, the IMD noted.

On Friday afternoon, Insat cloud imagery showed convective (rain-bearing) clouds driven down south to over parts of extreme South Peninsula, South Bay of Bengal, South Andaman Sea and East-central and Southeast Arabian Sea.

The upper air cyclonic circulation over East-central Arabian Sea persisted, and so did the trough from this system, though truncated and extending up to Gujarat only on Friday. But, the other weather-making trough embedded in the seasonal westerlies across the North-west border had checked in over North-east Rajasthan and neighbourhood.

WEATHER WARNING

A weather warning valid for Saturday and Sunday said that isolated heavy rainfall would occur over South Tamil Nadu and Kerala.

Forecast until Monday spoke about the possibility of fairly widespread rain or thundershowers for Kerala, Lakshadweep, Tamil Nadu and Andaman and Nicobar Islands.

It will be scattered or in the form of thundershowers over South Coastal Andhra Pradesh, Rayalaseema, Coastal and South Interior Karnataka, Konkan and Goa.

Minimum temperature is expected to fall further by 2 to 4 deg Celsius over many parts of North-west, Central and East India during the next week as colder north-westerlies begin to fill the plains.

Extended forecast until Wednesday said that fairly widespread rains would fall over South Peninsular India while being scattered over Gujarat and adjoining Rajasthan.

LA NINA OUTLOOK

Meanwhile, better model consensus is becoming evident over the tenure of the persisting La Nina event in the East Equatorial Pacific.

The strong La Nina conditions that boosted the Indian monsoon this year will continue at least into early next year, an update from the Australian Bureau of Meteorology (BoM) said. Earlier, a group of Japanese scientists at the Tokyo-based Regional Institute for Global Change had said that the La Nina might last for entire 2011 and even into 2012.

On Friday, the Climate Prediction Centre (CPC) of the US National Weather Services said that there is a 25 per cent chance that the La Nina would last into August-September-October 2011, well after the south-west monsoon for the year has ended.

‘Neutral' (neither La Nina nor monsoon-killer El Nino) conditions have been given a 50 per cent chance of sustaining while El Nino itself is being given only 25 per cent, according to the CPC outlook.

Even ‘neutral' conditions are enough to favour the cause of a trouble-free south-west monsoon for India, according to some experts.