Storm Clouds On The Horizon? Unemployment Holds Steady, But Weaknesses Are Showing   According to the Labor Department’s May nonfarm payrolls report, employment in the U.S.’ private sector increased in May by 139,000 jobs, keeping the unemployment steady at 4.2%. Although growth is always good, the number of jobs added was less than the 147,000 anticipated as recently as April.   However, the numbers get less rosy the further down you drill. According to Dow Jones Data, although economists forecasted 110,000 new jobs for last month, the jobs added were woefully fewer (37,000 private sector) than hoped for. Small business employment shrank by 13,000,...