Jisha Surya
First Published : 27 Oct 2010
THIRUVANANTHAPURAM: Though delayed, favourable conditions are developing for the onset of the north-east monsoon.
The India Meteorological Department (IMD) is closely monitoring the situation and is expecting the withdrawal of south-west monsoon and the subsequent onset of north-east monsoon within a week. According to the IMD, the north-east monsoon rains are likely to commence over Tamil Nadu and the rest of peninsular India around October 29.
The presence of cyclone Giri in the Bay of Bengal and formation of low pressure areas had delayed the north-east monsoon. Normally, the north-east monsoon starts on October 15, according to the IMD. Owing to the presence of low pressures over the Arabian Sea and the Bay of Bengal, wind concentrated towards the low pressure region. There was no expected reverse flow of wind. To mark the onset of north-east monsoon, wind patterns must change from the existing southwesterly to northeasterly.
As the effect of Giri and low pressures have faded, the IMD expects increase in rainfall activity over the extreme south peninsula towards the end of the week enhancing the possibility of the onset of north-east monsoon. The criteria for declaring the onset of north-east monsoon are the presence of widespread rainfall over the coastal Tamil Nadu and adjoining areas, withdrawal of south-west monsoon up to 15º N and onset of persistent surface easterlies over the Tamil Nadu coast. According to the IMD, these factors are developing and north-east monsoon may hit within a week.Weather experts feel that normal withdrawal of south-west monsoon and onset of north-east monsoon are changing.
Atmospheric scientist and professor-in-charge, Chair for Climate Change, SCMS, C K Rajan said that the State received fairly widespread rainfall this month. However, this was not under the influence of north-east monsoon. ‘’It is high time that we changed the weather concepts,’’ he opined. ‘’Now, the State is receiving rainfall, but the reasons are different. North-east monsoon should have been the reason for rainfall. But the rainfall this month was caused by low pressure formations instead,’’ Rajan said. The rain during north-east monsoon will be marked by thunderstorms.
First Published : 27 Oct 2010
THIRUVANANTHAPURAM: Though delayed, favourable conditions are developing for the onset of the north-east monsoon.
The India Meteorological Department (IMD) is closely monitoring the situation and is expecting the withdrawal of south-west monsoon and the subsequent onset of north-east monsoon within a week. According to the IMD, the north-east monsoon rains are likely to commence over Tamil Nadu and the rest of peninsular India around October 29.
The presence of cyclone Giri in the Bay of Bengal and formation of low pressure areas had delayed the north-east monsoon. Normally, the north-east monsoon starts on October 15, according to the IMD. Owing to the presence of low pressures over the Arabian Sea and the Bay of Bengal, wind concentrated towards the low pressure region. There was no expected reverse flow of wind. To mark the onset of north-east monsoon, wind patterns must change from the existing southwesterly to northeasterly.
As the effect of Giri and low pressures have faded, the IMD expects increase in rainfall activity over the extreme south peninsula towards the end of the week enhancing the possibility of the onset of north-east monsoon. The criteria for declaring the onset of north-east monsoon are the presence of widespread rainfall over the coastal Tamil Nadu and adjoining areas, withdrawal of south-west monsoon up to 15º N and onset of persistent surface easterlies over the Tamil Nadu coast. According to the IMD, these factors are developing and north-east monsoon may hit within a week.Weather experts feel that normal withdrawal of south-west monsoon and onset of north-east monsoon are changing.
Atmospheric scientist and professor-in-charge, Chair for Climate Change, SCMS, C K Rajan said that the State received fairly widespread rainfall this month. However, this was not under the influence of north-east monsoon. ‘’It is high time that we changed the weather concepts,’’ he opined. ‘’Now, the State is receiving rainfall, but the reasons are different. North-east monsoon should have been the reason for rainfall. But the rainfall this month was caused by low pressure formations instead,’’ Rajan said. The rain during north-east monsoon will be marked by thunderstorms.
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