Joe and I took the Heartland Flyer from Oklahoma City to Fort Worth in February 2005. We started out in the snow in OKC, and finished in the rain. Here are a few pics from the trip down.
Norman's Depot, softened by snow.
Oklahoma City's depot interior
Lead engine, ready to head back to OKC.
It's a great trip, with beautiful scenery. Very affordable, and highly recommended!