Rain & mud splashing onto basement window
It so happened to be a rainy night tonight, so I grabbed my flashlight and peered outside my bedroom window (above the basement window in question) and looked around. Bingo- there is a small 4X4 gray utility box that's on the siding, above the basement window. Plus, the street telephone lines and cable run to this same side and connect to a spot that is in about the same vertical line as this utility box!
So the pooling water from these obstructions is creating runoff with larger pellets of water than the usual rain drops, that drop down a good distance, hence the consistent splashes. My windowsill isn't the problem.
There must be some vinyl siding or trim that I could create a little awning out of and affix somewhere on the siding to deflect this run off further out to the lawn, as I'm not sure gravel would be enough alone.
Sorry for the rambling but thanks iin advance for any advice!