June 9, 2011 12:52 pm Forecast: Noon Heat Update It could be tough to #StayCool Thursday in Philly as temps near 100 degrees. US & World Videos 2:44 Cloudy, chance for rain this weekend 2:41 The weekend kicks off with mostly cloudy skies and passing showers 2:31 Back to cooler temperatures 2:36 Back to spring temperatures 3:04 Seasonable temperatures return to end the week