The ARB Cooperative Observer Network (ARBCON) is comprised of nearly 550 volunteer observers across the state of North Dakota. Since 1977, observers have recorded daily rainfall and hail occurrences at their locations for the months of April through September of each year. Starting in October 2010, some observers began snowfall reporting, thus making the network operational on a year-round basis.

Resources

ARBCON reports are all available to be viewed or downloaded through the mapping and data resources on this site.

The Interactive Precipitation Mapping link is a mapping resource for quickly displaying ARBCON data.

The State Water Commission Map Services are a variety of internet map servers with various themes. Currently there is one general map service which uses the Water Commission's vast data resources such as water data locations and precipitation info to integrate with our spatial data holdings including aerial photography, geo-political boundaries, transportation, and hydrographic features. Click the link in this paragraph or the graphical maps link near the top right.

Precipitation Maps allows you to view jpg files of monthly and yearly precipitation maps from 1977 through the present.

30 Year Average Maps - The conclusion of the 2006 growing season completed a 30 year continuous record of precipitation during the growing season in North Dakota. This has led to the completion of average rainfall maps for each month and the growing season as a whole.

Precipitation Download allows you to download data by county, latitude and longitude, or by individual Site ID number.