Waxahatchee’s Katie Crutchfield has been tapped as one of indie-rock’s more astute singer-songwriters for the better part of the decade, but new LP Out In the Storm marks a significant step forward. The Alabama-raised Crutchfield moved to Philadelphia after self-releasing her debut, 2012’s American Weekend!; the next year’s Cerulean Salt won her a spot on the Merge Records roster, while 2015’s Ivy Tripp set the table for Out In the Storm, which grapples with the anxiety and relief that come when a bad relationship is at last in the rearview mirror. Besides one of 2017’s best singles in “Silver,” the album adeptly balances full-throttle rockers with softer songs; confidence and catharsis course through the bold melodies of “No Question” and “Never Been Wrong.” Not only is it practically begging for year-end best lists, with a lucky break or two, Storm could double or even triple the size of the rooms Crutchfield plays. Best catch Waxahatchee on Sunday while those rooms are still relatively small.