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Middle Atlantic River Forecast Center
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Flood Frequency Information

This section of the MARFC website is devoted to flood frequency analysis information for the MARFC forecasting area. It contains information on how many times floods have happened in a specific month, percentages of flood occurrence for each month, probability, and average height above flood stage.

The main function of this project is to give the user historical flood statistics for all of The Middle Atlantic River Forecast Center (MARFC) forecast points. MARFC has received numerous requests from our customers in regards to historical flood information. This project answers these requests for the much needed information.

Flood information is available in an Access database. Please email us if you are interested in receiving a copy.

What's New - 7/30/2014

Potomac River at Edwards Ferry near Poolesville, MD will become a new forecast point in a couple of weeks and added to our flood information.

Potomac River at Wisconsin Ave (Washington DC) is a new forecast point and has been added to all of our flood sections. The major flood stage at this point is 10 feet. It was accidently listed at 8 feet and has been corrected. Due to a different datum, we might be lowering the flood crests by 1 foot during the period of 1877 - 1924. However more research needs to be done at this time.

After further research, we have combined the Feb 13, 1918 and Feb 15-16, 1918 flood into one event.

The Feb 1918 flood and Wisconsin Ave have changed the rankings somewhat. We have completed updating all of the rankings.

The June 12-14, 2014 flood has been added to our flood information.

We have added a new link to NOAA Northeast Climate Center to every flood our historic flood event section. This site contains precipitation and temperature information from 1843 - 1914.

We continue to add flood event weather summaries written by students from The Pennsylvania State University meteorology course.

The low water tables have been updated.


NOAA's National Weather Service
Middle Atlantic River Forecast Center
328 Innovation Boulevard, Suite 330
State College, PA 16803
Page Authors: Charles Chillag & Alaina MacFarlane
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Page last modified: December 31, 2012
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