The Central Ohio Raingage Network (CORN) is a group of volunteer rainfall observers who collect daily rainfall data at their homes or places of business, using inexpensive but reliable plastic rain gauges.  Our standard gage, which a majority of our volunteers use, is a conical rain gage with a capacity of about 7.5 inches.  The gauge is not commonly available, but can be ordered at the following website (http://www.johnnyseeds.com/p-8248-shock-proof-rain-gauge.aspx). This particular gauge has tested well against professional rain gauges, including the standard rain gauge used by CoCoRaHS, a national network of rainfall observers supported by the National Weather Service.

CORN volunteers submit their daily totals at the end of each month, and the data is processed into a summary report, which is published normally by the 10th of each following month.  Volunteer data for each report is typically quality-control checked; if time limitations result in the publishing of data without a quality control check, this fact will be indicated in the “Notes” section of the report.  Rainfall data from our network has been used as evidence in court cases; however, it is recommended that you contact the CORN Director or Assistant Director for an opinion/approval on specific data that is to be used as court evidence.  We have 34 current volunteers who have been providing daily rainfall data to us for more than 10 years; 17 of those volunteers have been reporting data for more than 15 years, and 11 of those have been reporting data for more than 20 years.

Archived electronic monthly reports dating back to April 1985 are available, free of charge on this website.  If you are interested in becoming a CORN volunteer, you can also register on the website.  You don’t need to be a resident of Central Ohio to participate in CORN … we accept data from outside of the Central Ohio area, from Ohio and also other States.  There is a special section in each monthly CORN report that presents daily precipitation data for volunteers that live outside of the Central Ohio area.  If you are interested in becoming a volunteer, contact us at therainguy@yahoo.com or theraingal@yahoo.com.

History of (CORN) Central Ohio Raingage Network
After moving back to Ohio, Bob founded the Central Ohio Raingage Network (CORN) in April 1985 with just four (4) volunteers. Initially, the network was formed to provide additional rainfall information to the Ohio Department of Natural Resources, Division of Water for publication of their Monthly Water Inventory Report for Ohio. However, the news media became interested in the rainfall data being collected by the network as documentation for flooding rainstorms and periods of droughts that were affecting the local area during the late 1980’s and early 1990’s. As a result, the network expanded rapidly … currently the network has about 60 gauges. Data from these volunteers is collected at the end of each month and organized into a report that is published monthly. The Central Ohio Raingage Network has furnished timely rainfall information to the local TV stations for use in their newscasts, and also to the Columbus Dispatch and other local newspapers for weather-related news articles and features. A number of state and local government agencies receive copies of our reports each month. Over the years, many other uses for the data have emerged, including use in engineering reports to document local historical flooding events, and as court evidence to establish liability in flood damage cases. Anyone who would like to collect rainfall/snowfall data for CORN is welcome to join the network by clicking on the “Volunteer” tab.

Bob Davis, Founder

Bob Davis, Founder & Director
Bob Davis is a retired hydrologist who spent 43 career years working for consulting engineering companies in Ohio, Michigan and Connecticut in the field of Water Resources/Stormwater Management. Bob served as Senior Hydrologist for EMH&T Engineers, Surveyors, Planners, Scientists in the Columbus, Ohio area from August 1991 to his retirement at the end of April 2012. Rainfall data collected by CORN was a very valuable resource in his hydrologic studies. Bob continues to operate CORN from his retirement home in Summerville, South Carolina.

Kristi Gardner, Assistant Director

Kristi Gardner, Assistant Director
Kristi is currently employed by EMH&T as a GIS Analyst and has been with the company since 1999. Kristi is responsible for creating, maintaining and analyzing geographic information system (GIS) databases.She is experienced in working with numerous themes of information. Kristi creates and prepares maps and graphics for departmental and public presentations using GIS software and advanced elements of cartography. She has created a GIS-based map showing CORN rain gauge locations in the Central Ohio area, and monitors the weather on a daily basis as part of a daily exercise routine for her dogs. Kristi is a CORN volunteer, and serves as the main contact for rainfall information within the EMH&T office.

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