an interactive web tool for extreme precipitation analysis & monitoring david nelson asst. state...
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EXTREME PRECIPITATION IN NEW YORK & NEW ENGLAND
An Interactive Web Tool for Extreme Precipitation Analysis
& Monitoring
David NelsonAsst. State Conservation EngineerUSDA – Natural Resources Conservation Service
Who is updating the analysis?
Northeast Regional Climate Center (NRCC), Cornell University Arthur DeGaetano Dan Zarrow
What does this study do?
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
2-year - 24 hour Design Storm Comparison
County TP-40(inches)
NRCC(inches)
PercentChange
Barnstable 3.5 3.3 -5 %Berkshire 2.9 2.9 0 %Bristol 3.4 3.3 -3 %Dukes 3.6 3.3 -8 %Essex 3.1 3.2 3 %Franklin 2.8 3.0 5 %Hampden 3.0 3.1 2 %Hampshire 2.9 3.0 3 %Middlesex 3.1 3.1 1 %Plymouth 3.4 3.4 -1 %Worcester 3.0 3.1 2 %
100-year - 24 hour Design Storm Comparison
County TP-40 Rainfall(inches)
NRCC Rainfall(inches)
PercentChange
Barnstable 7.1 8.2 16 %Berkshire 6.4 7.6 19 %Bristol 7.0 8.6 22 %Dukes 7.2 8.3 15 %Essex 6.4 8.8 38 %Franklin 6.2 7.4 19 %Hampden 6.5 8.0 23 %Hampshire 6.4 7.6 19 %Middlesex 6.4 8.5 33 %Plymouth 6.9 8.7 26 %Worcester 6.4 8.2 29 %
What does this study do?
Updates rainfall analysis
Provides interactive web tool for easy access
www.precip.net
What does this study do?
Updates rainfall analysis
Provides interactive web tool for easy access
Offers real-time monitoring of rain events
What does this study do?
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
Sample Changing Climate Product:Percent Difference Maps
Sample Changing Climate Product:Comparison Chart
www.precip.net
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