We have already booked nearly a half-inch of rain here on the WeatherDeck in Cockeysville. And down in portions of Virginia - "upstream" in this river of rain we're facing today - they're reporting totals that are already well over an inch. Here are some early rainfall totals for the region:

Culpeper, Va:  1.25 inches

Long Green:  0.80 inch 

White Marsh:  0.75 inch

Elkton:  0.65 inch

Bowie:  0.56 inch

Catonsville:  0.52 inch

BWI-Marshall Airport:  0.50 inch

WeatherDeck, Cockeysville:  0.49 inch

Westminster:  0.31 inch

Here's more from the CoCoRaHS Network.

The National Weather Service has posted Flood Warnings (bright green) for portions of Washington and Frederick counties, where the Monocacy and Potomac rivers are expected to flood today. There are Coastal Flood Advisories (yellowish green) for the Maryland portions of the Chesapeake, as east and southeast winds drive water into the Upper Bay and the tidal creeks.

If you see flooding today, and can safely take pictures, email them to me and we'll consider them for posting here. Your comments and reports on the weather you see around you are always welcome.

All of Central Maryland is under a Flood Watch through this evening, as 2 to 3 inches of rain could cause flooding in low-lying spots and poorly drained urban settings almost anywhere.

And, just to keep things interesting, Garrett County, in far western Maryland, is under a Winter Storm Watch for tonight. More than 6 inches of heavy, wet snow is possible overnight as the storm passes by and draws cold air down from the north behind the cold front.