Stormy Kris, a Whitney Tower filly consigned by Rising Hill Farm, agent, brought $150,000 Monday to top the opening session of the Ocala Breeders' Sales Company's 2001 spring sale of 2-year-olds in training. John Dolan and Wesley Ward purchased the session topper, who was produced by the Kris S. mare Surely Kris. The filly worked an eighth-mile in :10 2/5, the fastest work at the distance in the sale's first under tack show on April 18.In all, 191 horses were sold on Monday. They grossed $4,181,000 and averaged $21,890. The median was $15,000. Last year, during the auction's first session, 173 horses brought a gross of $4,427,300, an average of $25,591, and a median of $17,000. OBS reported that this year's buy-back rate was 28.7%, compared with 25.1% in 2000.Dolan and Ward were the day's leading buyers, taking home four horses for a total of $342,000. Amy E. Tarrant was next with four for $166,000, followed by Bruno De Berdt, agent for Malcolm Thwaites, with five for $165,000.Sweetheavenlycross, a filly by Saint Ballado consigned by Cecil and Ojia Stewart, agents and sold to Harold J. Plumley for $145,000, the session's second-highest price. The filly is out of Sweetsoutherncross, by Tri Jet, and is a full-sister to Plumley's stakes winner Sweetsouthernsaint.