The much awaited south-west monsoon may not reach the national capital Delhi on the 29th of this month as predicted by the Met office earlier. Talking to All India Radio, Director, Met department, Dr R.C. Vashisth said, there will be no monsoon rains in the next five to six days in the capital. He said that it is due to a developing weather phenomenon which has stopped monsoon winds from advancing over Delhi and its adjoining areas in North-West India. Dr Vashisth said, the monsoon has not moved forward from eastern Uttar Pradesh. He futher said that the monsoon usually advances in surges and the current surge which was expected to bring rain to Delhi and the region, has weakened. The next surge is not expected any sooner. As a result, monsoon onset over Uttar Pradesh was also delayed. Mr. Vashisth said, Delhi may experience some thunder showers, neither related to monsoon nor to western disturbance, over next three days. It is expected to be due to local heating.