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Millions of gallons of rainwater fell across parts of the DMV

Rain soaked the area on Saturday leaving a trail of flooding and hazardous road conditions.
Credit: WUSA WX

WASHINGTON — The D.C. Metro area got clobbered as nearly five inches of rain fell across the region early Saturday morning. The range of rainfall totals is wide. While some areas got close to five inches of rain, some towns received an inch of rain or less. Numerous neighborhoods flooded as heavy rain poured across the region. 

But if we took the rain amount over a given area and broke it down by the gallon, it adds up to millions of gallons of water that fell over the region. You can find these numbers by taking in to account the size of the area and the amount of rain. 

We get the official rain amounts for D.C. based on data from Ronald Reagan Washington National Airport.  Saturday,  the National Weather Service reported about four inches of rain there.  When we spread that out over D.C. which is roughly 68 square miles, we got a calculation of more then 4 billion gallons of water.   The approximate total was 4,726,968,320 gallons of water.  According to the U.S. Geological Survey, that's enough to fill more than 118 million standard bathtubs! (40-gallon) bathtubs!  

Using the rainfall calculator we found that approximately 130 million gallons of water fell over Ashburn, VA and more than 474 million gallons of water fell over Rockville, MD.  

To find out how many gallons of water fell at your house you can use the simple Rainfall Calculator with the U.S. Geological Survey. 

The National Weather Service tracks rainfall. Here's a look at rainfall totals around the region as of Saturday morning. 

Credit: WUSA WX
Credit: WUSA
Credit: WUSA WX
Credit: WUSA WX
Credit: WUSA WX

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