Here we go again? The National Weather Service has issued a severe thunderstorm watch for Washington, D.C., effective until 7 p.m. this evening. Our friends at the Capital Weather Gang are predicting that some strong storms could roll their way into D.C. — though so far, most of the activity has been concentrated between Washington and Baltimore. Winds up to 70 miles per hour are possible, something I’m sure that anyone who just got their power turned back on back yesterday is incredibly pleased to hear. In short, if you’ve got outdoor plans this evening, you’ll probably want to keep a close eye on the radar and pack the study umbrella.