Welcome to Massachusetts CoCoRaHS !

The Bay State became the 40th state to join CoCoRaHS on March 1, 2009
We have over 65 observers who help us measure daily precipitation
We are looking for more observers, especially in the
Boston area, Nantucket, and Connecticut Valley - Sign up today!
It's easy to sign-up. To join CoCoRaHS click here: Join CoCoRaHS
Cold Weather Means You'll Need to Protect Your Rain Gauge!
Remove the funnel and inner cylinder when freezing temperatures are expected.
See the latest newsletter (below) for additional information!
Check Out the Latest Southern New England CoCoRaHS Newsletter!
Fall 2009 SNE CoCoRaHS Oct09.pdf
Summer 2009 CoCoRaHS Summer 2009.pdf
How Do I Join CoCoRaHS?
It's easy to sign-up. To join CoCoRaHS click here: Join CoCoRaHS
You can take the observer training online.
Training sessions are held periodically.
We will post dates of training sessions here.
Once you sign up, you will receive a login and password.
After you have a rain gauge and begin making observations, you can log in and report them.
Your precipitation observations will start showing up daily on our county maps.
What Do I Need to Join?
We strongly encourage you to purchase one of these 4" rain gauges. This will ensure that the data collected by CoCoRaHS observers is not only consistent throughout Massachusetts, but between Massachusetts and the rest of the country!
The rain gauge costs $23, plus $7 for shipping, and may be purchased at:
WeatherYourWay.com, or AmbientWeather.com.
How Is CoCoRaHS Data Used in Massachusetts?
Some users of CoCoRaHS data include the National Weather Service (NWS), State and Local agencies, the media, and the public. For example, the NWS Northeast River Forecast Center uses daily precipitation data to supplement precipitation analyses, which are used to help predict river flows throughout the region. NWS Albany and Taunton use the data for drought analysis, post-event reviews, and to assist with the issuance of Flood Watches and Flood Warnings.
Did You Know???
Massachusetts averages between
40 and 50 inches of precipitation each year
Record for 24 hour rainfall:
18.15 inches in Westfield, Aug 18-19, 1955
Record maximum annual precipitation:
76.49 inches in New Salem, 1996
Record minimum annual precipitation:
21.76 inches in Chatham, 1965
Questions???If you have any questions about CoCoRaHS in Massachusetts, email
Joe Dellicarpini, State Coordinator, at
Joseph.Dellicarpini@noaa.gov or contact one of the Regional Coordinators listed below
Massachusetts CoCoRaHS Regional Coordinators
Southeast: Bill Simpson William.Simpson@noaa.govMetro Boston: Neal Strauss Neal.Strauss@noaa.govCentral: Nicole Belk Nicole.Belk@noaa.govWestern: John Quinlan John.Quinlan@noaa.gov
Massachusetts CoCoRaHS is a collaboration between:
Colorado State University, National Weather Service Offices in Albany and Taunton, the Massachusetts Department of Conservation and Recreation, and the American Meteorological Society