April 25, 2011 6:54 pm EarthWatch Afternoon Forecast: Monday, April 25, 2011 How long will the warm weather last? US & World Videos 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 2:05 Warming into the 80s by weekend's end 2:09 Big weekend warm-up expected