In an all-California final, Donna Adamek edged Pat Costello last night to win the Women's Professional Bowlers Association national championship tournament at Bowl America Shirley in Alexandria.

Adamek, from Duarte, outscored Costello, from Union City, in the final game, 245-223, to collect the $4,000 top prize. Adamek became the leading money winner on the women's tour this year, passing Costello.

Third after the 18-game match-play qualifier, Adamek beat Robin Romeo, 250-171, and Nikki Gianulias, 259-239, before facing Costello.

Romeo, in fourth place, had beaten No. 5 Aleta Rzepecki, 208-184. Gianulias, who was second, lost in her only competition of the night.

"I started bowling really well this morning," said Adamek, who is in her fifth year on the tour. "I had 279 and 266 in my last two games and I just felt super."

Adamek said a chipped bone in her right elbow, the result of a childhood injury, had caused her to change her style before the tournament. But the problem cleared up yesterday morning, she said, "and I went back to normal.

"In the last four weeks, I hardly practiced." I normally practice one or two hours a day but I was laying off for weeks at a time."

Costello, who practiced while Adamek blew past her opponents, wasn't happy with her effort.

"I didn't practice well," Costello said. "I had three good shots the whole game and in the crucial shots I threw the ball just terribly."

Costello had earned the top position by rolling a total pinfall of 4,048 for the qualifier. Her second-place check was for $2,000.

The ESPN cable sports network taped the finals and will telecast them Friday at 10 p.m. and again next Saturday at 3:30 p.m.