Citizen Science

Join the local Citizen Scientists who log rainfall and snowfall in their neighborhoods.  More Rainloggers means more data for university scientists and water professionals to use in their decision making processes.

Rainlog.org is a cooperative rainfall monitoring network for Arizona. Data collected through this network can be used for a variety of applications, from watershed management activities to drought monitoring at local, county, and state levels. Participants select a rain gauge, install it at home, and report daily total rainfall amounts through the online data entry form.

Official rain gauges in Arizona are few and far between. The large gaps in coverage are a particular problem where precipitation amounts are highly variable due to topography and seasonal weather patterns. This is especially true during the monsoon season, when thunderstorms can produce heavy rainfall that is very localized.

All data posted by volunteers is available in real-time in maps and time series graphs through the data tab at the top of the web page. These maps are useful in tracking high-resolution variability in precipitation patterns and potential changes in drought status. As more people participate and more information is gathered, the resolution of the maps will improve.

Maybe you're just curious about the amount of rain or snowfall in a particular area in Arizona. Rainmapper is a free web-based service that provides neighborhood-specific rainfall estimates based on reports from a network of over 2,000 RainLogger volunteers.