Framed pine forest watercolor in mahogany frame

I lost my framed pine forest watercolor yesterday around 3pm after popping into the Grand Avenue shops on Main Street in downtown Wausau. It's a 16x20 inch piece, watercolor on cold-press paper, in a dark mahogany frame with a cream mat. The painting is signed 'A. Nguyen' in the lower right, and the frame has a small dent along the top edge; the glass has a tiny nick near the left corner. This piece has sentimental value—it was a gift from my grandmother, and I’d be incredibly grateful to get it back.