April 6, 2011 12:56 am EarthWatch Evening Forecast: Tuesday, April 5, 2011 Warmer weather could arrive by this weekend. US & World Videos 2:06 Feeling like summer 2:36 A summer preview 2:50 One more cool day, then warmer weather ahead 3:15 Cold night, then a big warmup this weekend 3:05 Temperatures to heat up over the weekend