Wednesday, July 14, 2010

Rains lash parts of north-west; heavy downpour in east

Many parts of north-west, east and east-central India continued to receive heavy to very heavy rainfall during the 24 hours ending Tuesday morning.
An India Meteorological Department (IMD) update said that fairly widespread rainfall has occurred over the west coast, Assam, Meghalaya, Bihar, East Uttar Pradesh, Vidarbha and east Madhya Pradesh.

SOUTH-WESTERLY WINDS
It was scattered over coastal Andhra Pradesh, Gangetic West Bengal, Chhattisgarh, Punjab, Haryana and Himachal Pradesh.
South-westerly strong winds carrying moisture from North Arabian Sea continue to blow inland over Gujarat and Rajasthan in the lower levels of the atmosphere.
The western disturbance over Jammu and Kashmir and neighbourhood has continued to persist as an upper air system.
It could hold on to its position for another two more days.
In another good augury for central and east India where the rainfall has been varying deficient thus far, the axis of the monsoon trough is likely to shift southwards during next two days.

‘LOW' IN BAY
This indicates building activity in the Bay of Bengal, and numerical weather prediction models have suggested the formation of a low-pressure area over the northwest Bay by Wednesday.
Scattered rain or thundershowers are likely over Chhattisgarh, Madhya Pradesh and Vidarbha during next 24 hours and increase thereafter, the IMD said.
A warning valid for the next two days said that isolated heavy to very heavy rainfall would occur over Assam, Meghalaya, West Bengal, Sikkim, Orissa, Bihar, Jharkhand and East Uttar Pradesh.
Meanwhile, northwest Pacific has already thrown up a typhoon, named Conson, which is bracing to hit the Philippines.

PACIFIC TYPHOON
Conson is forecast to enter the East China Sea later and head towards the eastern coast of mainland China. Conson may briefly lose typhoon status after hitting the Philippines, but after entering East China Sea, it could undergo another round of intensification, according to international models.
This could have implications for Indian monsoon, since it would be forced to part with some of the moisture to a much stronger system taking shape in the same equatorial seas. The US National Centres for Environmental Prediction (NCEP) has indicated that the ‘low' forming in the Bay of Bengal may move west to cross Orissa coast but not go far beyond central India.

RAIN ALERT
An IMD outlook valid till Friday said widespread rain or thundershowers is likely over West Bengal, Sikkim, Bihar, Jharkhand and East Uttar Pradesh during the next two days.
Fairly widespread rain or thundershowers would occur over the Northeastern States, Lakshadweep, the west coast, Andaman and Nicobar Islands and Orissa.
Scattered rain or thundershowers is likely over Jammu and Kashmir, Himachal Pradesh, Uttarakhand, Punjab, Haryana, Chandigarh, Delhi and West Uttar Pradesh on Wednesday but may decrease thereafter.
The International Research Institute (IRI) for Climate and Society at Columbia University has maintained the outlook for occasional rains lashing an arc from northwest to east India during the rest of the week.
The arc would extend from Gujarat into parts of Rajasthan and the rest of northwest India before becoming increasingly wet over east India.
The Fleet Numerical Meteorology and Oceanography Centre of the US Navy, too, has indicated that the wet session in the region would pan out along these lines.

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