beach,n maryland, long leonardtown, moderate to heavy rain right now. quite a lightning show on the other side of the bay. we look for that to settle down the next hour, 90 minutes. inside the capital beltway, the becomingnning to ease, lighter and upper northwest d.c., towards bethesda and montgomery county and frederick outside, mostly cloudy at this hour. tonight, 72 to 80, patchy fog in the early morning. not amounting to a whole lot. the heat advisory goes into effect at noontime tomorrow come extending through the afternoon in early evening. could see heat index values of 105 to 109. growing more confident tomorrow will be the last day for the heat advisory. the futurecast, in terms of the heat index values, the feels-like temperatures, 100 to 107, 108 tomorrow afternoon. drink plentyfort, of fluids, try to slow things down a bit. also be mindful of kids and pets. a few showers and thunderstorms trying to develop in the afternoon. not expecting anything severe. that it chance of widespread showers and thunderstorms activity into the day wednesday.