nicky carvajal, nbc news, arlington, virginia. >> now at 00, batter up. the festivities in full swing as they get red for the major league baseball all-star game. we have team coverage tonight from the home run derby. >> metro's biggest union votes to avert a workers strike. >> betting on the future. the$5 nearly million plan to expan the casino at the mgm national harbor. >> we're going to start the laid we all of these storms blaring up and sweeping into the district. oh, boy, are they kicking up and they wilct have a big im on the all-star festivities this evening but most assuredly the ride home so let's head to amelia draper. she's in the storm center with the word. >> right now i'm tracking thunderstorms pretty muc in the d.c. metro area. not a lot of activity in prince george's activity and overall movement with the thunderstorms now with the northeast and they are moving slowly at 10 miles per hour. can you see them impacting at the top of the beltway moving in the fairfax along 66 and heading to montgomery county. heavy rain down around poolsvill