Contrasting pre-monsoon features associated with early and late onset of southwest monsoon over Kerala

Contrasting features pertaining to a year each of early monsoon (2004) and late onset (2003) are examined during the pre-monsoon season. The weekly evolution low level winds month May monthly middle upper winds, Sea Surface Temperature (SST), Precipitable water, Outgoing Longwave Radiation (OLR) mean sea pressure gradients analysed both these years in present study.
 result shows that 2004 wind indicates strong cross equatorial flow with cyclonic from beginning associated negative SST anomaly over southern Arabian Sea; whereas, 2003, weak persisting upto first week June positive Sea. tropospheric indicate stronger Tibetan anticyclone accompanied by very easterly anomalies compared 2003. convective activity was Indian region south China 2004, which is just opposite precipitable water higher than normal deep moist layer meridional gradient between northern India were months April earlier reversal winter summer