CoCoRaHS…What is this?

Happy Monday, everyone. Another beautiful March day. We have had an incredible March so far if you like it warmer and sunnier than average. There is a lot more sun and warmth in this forecast. Tuesday will likely be the warmest day of the week with highs hitting the low 50s near the lake and 60 well inland. The forecast remains quiet much of the week. A “back-door” cold front arrives during the day on Thursday. This will drop the temps as the day progresses on Thursday. Especially near the lake. Sunday’s storm is still a big question. The GFS model keeps all the precipitation south of us, but the European and Canadian models still give us a chance of rain and snow. Stay tuned.

In the meantime, because of the quiet forecast, I thought I would introduce many of you to something called CoCoRaHS. I assume that if you are reading this blog you are a weather junkie. What I’m asking from you is that you read the attached information about this worthy project. All it takes is your weather interest and the ability to measure rain and snow. The only caveat is that you will have to buy an official rain gauge. Even if you don’t want to participate in CoCoRaHS, here at Weather Watch 12, we love to get your weather reports. Feel free to send them as a reply to this blog or by emailing us at: Thank you. Mark

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Welcome to CoCoRaHS-Wisconsin-
a volunteer rain/snow measuring program

General Information

CocoRaHS-Wisconsin observers provide a great volunteer service to the community, the county and the state by providing information on precipitation, snowfall, and snow depths. The information is used by government and university scientists, community officials, farmers, county emergency managers, watershed managers, drought monitors, and by your friends and neighbors.

    The only requirements for participation are:

  1. A volunteer spirit.
  2. An enthusiasm and dedication for watching the weather and daily reporting of local precipitation conditions on a systematic and timely basis. You will be asked to make your precipitation measurements around the same time every day…in general, around 6 am-8 am.
  3. Getting yourself trained and set up with the proper equipment.
  4. A computer with internet access.

Wisconsin State Coordinator
Brian Hahn – Service Hydrologist
National Weather Service – Sullivan, WI

Additional Wisconsin Contacts
Loren Ayers
DNR- Madison, WI
Citizen-based Monitoring Network

Ed Hopkins
Wisconsin State Climatology office
Univ. of Wis.-Madison

Find Your Local County Coordinator

Equipment needed and where to get it

You will be asked to use the standard manual 4″ diameter round plastic rain gauge that will hold up to 11″ of water…even if you already have some other type of manual or automated rain gauge. For an explanation of why CoCoRaHS uses the 4″ diameter rain gauge, please go here.

If you do not currently have a 4″ diameter rain gauge, you can order one from or for only $25.25 plus shipping charges. This is a special price for CoCoRaHS members.

Training is required! Please review the easy-to-understand online training available on the CoCoRaHS web site. It is possible that some other forms of training may be set up in the future. If so, announcements will appear on this web page.

How to Join

Click here to go to the CoCoRaHS Application Form

Find Your Local County Coordinator

Information about building your own rain gauge measuring tube stand:



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