Ground shot of the same thunderstorm, wide shot, from the back yard at 8:45pm.
Here is the view on the TDWR at the same time. The microburst is circled with arrows showing the direction of the wind. It looks like winds were about 30-35 mph both toward and away from the radar. If this were at the approach end of an airport it would be a real problem.
Finally, here is an enlargement of the cloud base and near-ground environment with the air flow of the microburst indicated.