April 27, 2011 5:20 pm EarthWatch Afternoon Forecast: Wednesday, April 27, 2011 How long will the warmer temps 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