 And tomorrow, I'm tracking a cold front. This cold front arrives late afternoon into the evening. It will trigger showers and storms, some strong to severe. We have a heat advisory for the day. Highs will be in the 90s behind the cold front on Thursday. We're in the 80s. At this hour, it's 99 degrees in Leesburg, 100 in Frederick, 101 downtown with heat index values at 108 in the district, 107 in Manassas, and 109 in Leesburg.