The race will be opened by Tanja Poutiainen of Finland. Croatia's promising talent, Ana Jelusic's bib number is 6.
The first leg is scheduled for 15:45 hours.
Race organisers have said that everything is ready for this event.
The slalom, which is the third race to be held on Sljeme within the FIS World Cup, is expected to attract up to 10,000 people.
Zagreb city authorities have warned that a special regime of traffic will be in place on roads leading to Mount Sljeme.
The prize money of the race is 165,000 euros.