 82 degrees in Manassas, Frederick with 85, and it is 89 downtown at Metro Center. Brought to you by Mervis Diamond Importers. At Mervis, you'll find everything you'd expect from a fine diamond. Except the price. Only at Mervis Diamond Importers. Coming up on WTOP, some cool, if unusual, treats to help you beat the heat. More news in 60 seconds.