Watching the storm come in from the secret storm chaser's lair

With half the sky getting ominously dark (and the other half staying blue) around 4 p.m., we knew exactly what to do: Head to the top of Millennium Park in West Roxbury to catch some storm-cloud action. We were not disappointed, but this time we had company: NBC Boston's radar station on wheels, its radome in the upright position, ready to Doppler the incoming storm like nobody's business: