Monday, December 27, 2010 ... cloud formation expected to pop near C.coastal Tamilnadu in another 24 hrs due to "96B"
7pm, Still the cloud formation of "96B" is concentrated over S and S-W Bay ...
RT @malhotramona: @weatherofindia bandra mumbai cool foggy n cold
US-NAVY is currently tracking a LOW system over S-W Bay.. "96B".. position :: 6.4N , 81.5E ...
COLA-GFS - forecasts :: Present circulation over S-W bay will trigger heavy showers along C and N. TN coast, 29-Dec..
Next western disturbance over N-W India will lift the Foggy conditions ...
Past week's Monsoon rains cause havoc in Sri Lanka ...
Rain forecast for entire C and N coastal Tamilnadu, chennai on 29,30-Dec...
The present easterly over S-W Bay will start to affect C and N. Tamilnadu coast from evening of 28-Dec..
Today, still a weak circulation persisted over Bay just S-E of Srilanka...

Fog may linger until next westerly pushes in

Wind, temperature and moisture values have conspired to set up fog to dense fog conditions over parts of northwest India.
Horizontal movement of moist air over a cold surface and the consequent cooling of that air to below its dew point are possible reasons.

Clear nights, below-normal temperatures and humidity (ranging between 80 to 90 per cent) only abet these conditions.
It would take another western disturbance, one of which is forecast to enter the northwest in the next couple of days, to upset this pattern.
An India Meteorological Department (IMD) update on weather during the 24 hours ending Sunday morning said that mercury dipped over northwest India after seeing off the last western disturbance.

The lowest minimum in the plains of the country was 1.0 deg Celsius recorded at Narnaul in Haryana during this period.
Dense fog conditions prevailed over parts of Punjab, Haryana, Delhi and north Rajasthan during morning hours.
The cool and dry weather is expected to prevail over northwest, west, central and east India over the next two days.
Lingering moisture would cause the fog to linger over Punjab, Haryana, Delhi, Chandigarh, north Rajasthan and west Uttar Pradesh.

No significant change in night temperatures is expected over northwest and adjoining central India during this period. In fact, cold day conditions would prevail over isolated pockets of Haryana, Punjab, north Rajasthan and west Uttar Pradesh on Monday, the IMD said.
But forecast valid until Friday said that scattered rain or snow would occur over the western Himalayan region. Scattered rain or thundershowers would also occur over parts of plains of northwest India as the incoming western disturbance establishes its presence.

Satellite imagery showed the presence of convective clouds over parts of Jammu and Kashmir, south Arabian Sea and south Bay of Bengal.
Meanwhile, in the south, an easterly wave with an embedded upper air cyclonic circulation over southwest Bay of Bengal has started affecting extreme south peninsular India. A few international models have been indicating the possibility of the circulation strengthening to become a low-pressure area or even a depression.
An IMD forecast valid until Friday (December 31) said that fairly widespread rainfall could occur over parts of south peninsular India. Meanwhile, an IMD agro-advisory bulletin dated December 24 said that the early sown rabi crops like wheat, mustard and gram have reached vegetative/late vegetative stage in Punjab, Haryana, Himachal Pradesh, Rajasthan, Delhi, Madhya Pradesh, Chhattisgarh and Bihar.
After the abatement of low temperature conditions and application of irrigation coupled with ideal soil moisture conditions, farmers have been advised to undertake intercultural operations and application of fertilisers.
Severe cold conditions prevailed across north and eastern states of the country during the last week. These had triggered ground frost in some parts.
As there are chances of cold injury in the standing rabi crops in the above region, farmers are advised to apply light irrigation to the standing crops and build up smoke to protect the standing rabi crops from cold/frost injury.
Due to heavy rainfall during early part of December, rice crop have been extensively damaged in Thanjavur, Nagapattinam, Thiruvarur and Cuddalore districts of Tamil Nadu.
Similarly, most of the paddy, sugarcane, banana, pulses and vegetable fields in
Srikakulam, Vizianagaram and Visakhapatnam in Andhra Pradesh got submerged. Farmers have been advised to arrange for drainage facilities.
Chennai - records another cold morning... 20.5 deg C (5:29am)
Visibility less than 50 meter in some parts of Punjab,  Haryana, Delhi and north Rajasthan
Dense fog would occur over Punjab, Haryana, Delhi, Chandigarh, n. Rajasthan and w. UP
during next 24 hours and decrease thereafter.