A stationary front…separating very warm air from very cool air….reaches from our area northwestward into the lower Great Lakes. Any thunderstorm activity should remain south of the front…largely south of the Metropolitan Washington area. Slightly more stable air will be overheard tomorrow. The result will be a partly cloudy day with only a slight chance for afternoon thunderstorms.

On Friday, a one day heat surge may push temperatures close to 90 degrees in spots. There will also be a better chance for afternoon and evening showers and thunderstorms. Looking ahead to the weekend…we think it will remain quite warm, in the 80s, on Saturday with isolated thunderstorms. And then a cold front should bring sunshine, cooler and drier air into the region on Sunday. There is a chance the drier air could arrive on Saturday. We will have a better idea of the weekend will play out, weather wise, by this time tomorrow.