Skip Navigation Link
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
Middle Atlantic River Forecast Center
Local forecast by
"City, St"

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 - 4/19/2015

The 4/4-5,2015 flood in the North Branch Susquehanna basin has been added and the 4/9-12, 2105 and the 4/14-15,2015 floods are being added.

Several of the "MARFC Historic Flood Event" tables are being updated for flood stage or moderate/major differences at that time. The tables are a little smaller than usual and some of the font is squeezed in the rows or columns. The different categories will also have minor effects on power rankings which will be updated after we finish the above.

A few low stage readings continue to filter in. We are currently going over this data and will update "Top Five Low Stages" as needed.

We would like to thank The Pennsylvania State University meteorology students for writing up weather summaries for some of our floods in the 1960s and 70s.

All other flood information is up to date. However we noticed a few points in the flood frequency events sections are bogus due to minor, moderate or major category changes. We are currently working on this and will add a message when fixed.



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
Webmaster's E-mail:
Page last modified: December 31, 2012
Disclaimer Privacy Policy
Credits About Us 
Glossary Career Opportunities