Towlie, don't remember exactly where you are, but if you commute on I-20 through Grand Prairie, on the way home from work take 1382 south to the Joe Pool Lake Dam Overlook parking lot, and you've got 4 miles of paved road on top of the dam between the gates, with no powered vehicles except wheelchairs (never seen one) permitted between the closed gates. You still may need lights.
If you are convinced that the weather is truly too awful to ride, go to the Dallas Nature Center (408 south turns into Clark Road south to Mountain Creek Parkway, right to the Dallas Nature Center) and hike all the trails. Fast. Might need headlamp, I guess. You'll have to check the hours too. They have funding problems from time to time, and they have to cut back on hours. The other choice, farther south, is Cedar Hill State Park.