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Welcome to Massachusetts CoCoRaHS !

The Bay State became the 40th state to join CoCoRaHS on March 1, 2009

 We currently have 300 observers who help us measure daily precipitation
We are always looking for new observers. Sign up today!!!

Have Questions or Would Like More Information?
Contact  Joe Dellicarpini, State Coordinator,
or contact your Regional Coordinator listed below.

IT'S BACK! Check out the latest SNE CoCoRaHS Newsletter!
(Thanks to our new Editor, Matt Spies, CT-FR-9)

November, 2015: Nov2015SNE.pdf
October, 2015: Oct2015SNE.pdf
September, 2015:  Sep2015SNE.pdf
August, 2015:  Aug2015SNE.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 a plastic 4" rain gauge. 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 around $30 plus shipping, and may be purchased at:

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


If you have any questions about CoCoRaHS in Massachusetts, email
 Joe Dellicarpini, State Coordinator,
or contact one of the Regional Coordinators listed below

Massachusetts CoCoRaHS Regional Coordinators

Metro Boston and Southeast: 
Bill Simpson
Central:  Nicole Belk
Western:  John Quinlan

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