National Weather Service Baltimore-Washington: “With the upper low from earlier in the week still nearby, expect showers/thunderstorms around the area this weekend. Even better chances loom for Mon as a strong cold front approaches from the west. Severe thunderstorms and flooding are possible.”
“Today: Scattered showers and thunderstorms between 11 am and 5 pm, then showers likely and possibly a thunderstorm after 5 pm. Patchy fog before 9 am. Otherwise, mostly cloudy, with a high near 86. Light south wind. The chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.”
