Seasonal activity over S-E Corner Bay will start from 30-Sep.

GFS :: The activity over S. Bay will move over Srilanka and then into Gulf Mannar causing widespread showers over S. Tamilnadu on 28-Sep

12pm, 95% India is having a dry day... Heavy activity over S-W and South Bay ... http://ow.ly/i/45DQ

RT @joshva: @weatherofindia Now it's so hot in Chennai.

In 24 to 36 hrs, Heavy T. showers forecast for Central, N-W Tamilnadu.

Chennai - Touched a max of 32.9 C (10:31am) and now 12:55pm we have breeze from E-N-E and temp. going down.

Chennai - Almost had a thunder shower around midnight ... West and S-W suburbs got some showers!

On 26-Sep, There'll be a low circulation along N. Tamilnadu and the S-E arabian sea circulation will persist.. http://ow.ly/i/45D5

Early morning Analysis show, LOW level circulation over S-E Arabian sea over Lakshadweep ... http://ow.ly/i/45Cu

LA NINA & NEM 2010

La Niña strengthened during August 2010, as negative sea surface temperature (SST) anomalies reached at least -1^oC across most of the equatorial Pacific Ocean by the end of the month. Consistent with this evolution, the subsurface heat content (average temperatures in the upper 300m of the ocean) decreased further, reflecting the additional cooling of sub-surface waters east of the International Date Line.. Also convection was enhanced over Indonesia, while remaining suppressed over the western and central equatorial Pacific. The pattern was associated with the continuation of enhanced low-level easterly trade winds and anomalous upper-level westerly winds over the western and central equatorial Pacific. Collectively, these oceanic and atmospheric anomalies reflect the strengthening of La Niña.

1. During last week the equinoctial Pacific SST have been NEGATIVE:
2. LA NINA is expected to last during this Northern Hemisphere winter [2010-11]
3. Though Indonesian region convective activity is expected to enhance, sleek of this convective belt into Bay is NOT predicted.
4. There is chance that cold tongue may cross and sleek into western Pacific unto Indonesia.
   

Courtesy: Climate Prediction Center / NCEP
20 September 2010 {update}