AHPS - Advanced Hydrologic Prediction Services

The Advanced Hydrologic Prediction Services is an initiative from the National Weather Service to provide longer term hydrologic outlooks to the various users of hydrologic information, such as local emergency management officials, reservoir operators, and other water resources managers. The format of the products tends to be graphical in nature, as opposed to the text-based products generally issued for current forecast products. The data in the products tend to be probabilistic in nature, based on analysis of historic precipitation, temperature and streamflow, current river and basin conditions, and short-term meteorologic outlook. The core of the AHPS system is the Ensemble Streamflow Prediction program, which is part of NWSRFS (National Weather Service River Forecast System).