Ariel Atkins added 11 points and Jada Underwood and Brooke McCarty each had 10 for the Longhorns. Texas never trailed.
Texas blew it open in the second as Northwestern State (3-1) put just five points on the scoreboard and Texas led 47-14 at halftime.
Attura led the Lady Demons with 15 points and Shahd Abboud finished with 13 for Northwestern State.
The Longhorns led the all-time series between the two 5-0. Texas has outscored the Lady Demons 172-72 in their last two outings. The Longhorns beat Northwestern State 86-33 last year in Austin.
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