CDO

Dear CDO community,
I have to calculate monsoon onset date (based on onset circulation index OCI of Wang et al. 2009) for my model data.
OCI monsoon onset for a particular year is defined as the day when 850-hPa zonal wind averaged over the southern Arabian Sea region exceeds 6.2 m/s with the provision that for the following consecutive 6 days also 850-hPa zonal wind exceeds 6.2 m/s.
I have a file of 36 years containing daily data of 850hPa zonal wind averaged over the required region.
Could anyone please tell me how to calculate the onset date for each year. Is there any command in CDO to read such days and create a file containing those days. It is urgent for my work. actually i have to repeat this task for so many models.

Thanks in anticipation,
Anubhav