1. An Interactive Web Tool for Extreme Precipitation Analysis & Monitoring David Nelson Asst. State Conservation Engineer USDA – Natural Resources Conservation Service

2.  Northeast Regional Climate Center (NRCC), Cornell University  Arthur DeGaetano  Dan Zarrow

3.  Updates rainfall analysis  Rainfall Frequency Atlas of the US, TP-40, National Weather Bureau, 1961 (≈ 20 years of record, 1938 – 1958 )  Also:  NWS HYDRO-35, 1977: 5- to 60- Minute Precipitation Frequency for the Eastern and Central United States.  Technical Paper 49, 1964. Two- to Ten- Day Precipitation for Return Periods of 2 to 100 years.  New study includes rainfall events through 2008  NOAA’s National Weather Service Atlas 14 updates not yet available for New England and New York

4. County TP-40 (inches) NRCC (inches) Percent Change Barnstable3.53.3-5% Berkshire2.9 0% Bristol3.43.3-3% Dukes3.63.3-8% Essex3.13.2 3% Franklin2.83.0 5% Hampden3.03.1 2 % Hampshire2.93.0 3% Middlesex3.1 1% Plymouth3.4 -1% Worcester3.03.1 2%

5. County TP-40 Rainfall (inches) NRCC Rainfall (inches) Percent Change Barnstable7.18.216 % Berkshire6.47.619 % Bristol7.08.622 % Dukes7.28.315 % Essex6.48.838 % Franklin6.27.419 % Hampden6.58.023 % Hampshire6.47.619 % Middlesex6.48.533 % Plymouth6.98.726 % Worcester6.48.229 %

6.  Updates rainfall analysis  Provides interactive web tool for easy access

11.  Updates rainfall analysis  Provides interactive web tool for easy access  Offers real-time monitoring of rain events

17.  Updates rainfall analysis  Provides interactive web tool for easy access  Offers real-time monitoring of rain events  Provides a method to update the analysis in the future