It's The Wonder of Nature, Baybee!

I've got to help the eldest Llama-ette with a Science Fair project about lightning this weekend. Looks like we picked the perfect time to get into it:

... Moderate to heavy rainfall expected tonight and Saturday with severe weather possible late Saturday...

A warm front poised south of the region this morning will struggle
to move north today and tonight. Meanwhile... a strong region of
high pressure will be positioned over New England. This will
result in east flow across the region.

Numerous showers and thunderstorms will develop today in the warm
unstable air mass across the central Appalachians... and then move
northeast over the more stable air across the mid Atlantic.
Thus... expect a round of showers to develop today... with
thunderstorms becoming increasingly numerous southwest of
Washington... especially around Charlottesville... Harrisonburg...
Staunton... and Waynesboro.

Due to the rising amount of moisture in the air... moderate to
heavy rainfall can be expected late today... and continue through
tonight. Around an inch of rain will be possible across the
area by Saturday morning... with heavier rainfall amounts likely
along the eastern slopes of the Blue Ridge. This could lead to
localized flooding if several rounds of heavy rainfall pass over
the same area.

The warm front should make it north of the region Saturday
morning. Then... a squall line associated with a cold front will
cross the region Saturday afternoon through mid evening. It will
collide with the moist airmass already in the mid Atlantic...
resulting in the potential for another period of very heavy rain.
Additional rainfall amounts of 1 to 3 inches will be possible and
could lead to flash flooding Saturday afternoon and evening.

A few severe thunderstorms could develop along and ahead of the
squall line as well. Damaging winds and large hail would be the
most likely severe weather threat. An isolated tornado would also
be possible.

(I also observe with some self-satisfaction that I managed to get the yard mown last evening in anticipation of the deluge.)