6:40 p.m. update: Looks like the rain risk isn’t over yet. This storm, if it holds together, would move through or near Nationals Park between approximately 7:30 and 8 p.m.

From earlier: The chance of showers and storms this late afternoon into early evening is better south and east of DC. But there is certainly some potential for a storm to pop around Nationals Park, especially before 7 p.m.
While rain chances diminish after 7 p.m., they don't completely go away.
All that is to say, a delay is possible but not definite. Even if there is a delay, it doesn't seem likely to lead to a postponement.
Nationals vs Seattle Mariners, first pitch: 6:45 p.m.
- Temperatures: Starting in the low to mid-90s, dropping into the 80s.
- Chance of rain: 40%
- Chance of delay: 40%
- Chance of postponement: 25%
We'll post any needed updates at the top of this post.
