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Repository: National Weather Service Advanced Hydrologic Prediction Service

Below are the details for this specific Environmental Information Repository.

Repository: National Weather Service Advanced Hydrologic Prediction Service
Created by Jacque Schei on 5/13/2013
Updated by Jacque Schei on 5/13/2013
ID: 1141

National Weather Service Advanced Hydrologic Prediction Service


Advanced Hydrologic Prediction Service (AHPS) is a web-based suite of products that display the magnitude and uncertainty of occurrence of floods or droughts, from hours to days and months, in advance.  These graphical products are useful information and planning tools for many economic and emergency managers. 

The majority of the observed water level data displayed on the AHPS web pages originates from the USGS National Streamflow Information Program which maintains a national network of streamgages. In addition, real-time water level information is collected from other federal, state, and local streamgage networks.The data from water level gauges around the country is gathered by the Hydrometeorological Automated Data System (HADS), operated by the NWS Office of Hydrologic Development.

HADS is a data acquisition, data processing, and data distribution system. HADS acquires and processes raw hydrological and meteorological observational data from thousands of ground based Data Collection Platforms (DCPs) owned and operated by hundreds of federal, state, and local agencies around the United States. Following the processing of the raw data, HADS delivers the observational data to the Weather Forecast Offices (WFOs) and River Forecast Centers (RFCs) in the form of collective data products tailored for each office's use. The WFOs and RFCs subsequently use the data in their hydrologic models and to create the informational displays viewed on the AHPS web pages.

managers, researchers

administered by the National Weather Service; contact






The following items are associated with this Environmental Information Repository.

Who’s Using this Repository?

Sample Designs



End User License Agreement

All visitors to may read content without creating a user account. To add content and participate in collaboration features, users must create an account. Account holders must provide their name and email address, which will be viewable by anyone visiting the site.

Privacy Act Statement


Relevant acts include the Organic Act, 43 U.S.C. 31 et seq., 1879; Fish and Wildlife Coordination Act, 1934; Fish and Wildlife Act, 1956; Migratory Bird Treaty Act, 1918; Migratory Bird Conservation Act, 1900; Federal Land Policy and Management Act, 1976; Fish and Wildlife Improvement Act, 1978; Endangered Species Act, 1973; Marine Mammal Protection Act, 1972; Great Lakes Fishery Act, 1956; Nonindigenous Aquatic Nuisance Prevention and Control Act, 1990; Water Resources Development Act, 1990; and other authorizations conveyed to the U.S. Geological Survey.

Principal Purpose provides a structured system to document, store, manage and share methods, protocols, sample designs, study designs and sample locations related to natural resource monitoring and research.

Routine Uses

Used to document and share the who, what, where, when and how of natural resources monitoring and research. Users who wish to provide content, edit content and use the collaboration features of the site must create an account. Account holders must provide their name and email address, which will be viewable by anyone visiting the site. staff may use email addresses to periodically communicate development updates, bug fixes and content to participants and to assist with completion of content, if needed. The Community feature of supports User Profiles, which allows all site visitors to view name, email and each users’ content. Name and email of participants entering information is published via application programing interfaces (API) and shared with Sitka Technology Group (vendor contracted for site development).

For all site visitors, the following information is collected:

  • The name of the domain from which you entered our website (for example, "")
  • IP Address (an IP address is a number that is automatically assigned to your computer whenever you are connected to the web)
  • The type of browser and operating system used to access our website
  • The date and time you access our website
  • The pages within our website that you visit
  • If you linked to our website from another website, the address of the website
  • This website uses session cookies. They provide enhanced navigation through the website.

We use this information to measure the number of visitors to the different sections of our website and to help make our website more useful to visitors. We do not track or record information about individuals and their visits. This information is not shared with anyone beyond the support staff for this website, except when required by Law Enforcement investigation. This information is not sold for commercial marketing purposes.

Disclosure is Voluntary

If the individual does not furnish the information requested, there will be no adverse consequences. However, if you do not provide your first and last name and email address you will not be able to enter content into

Paperwork Reduction Act Statement

The Paperwork Reduction Act of 1995 (44 U.S.C 3501 et.seq.) requires us to inform you that the isnformation is being collected to supplement natural resource monitoring metadata, to promote publicly accessible documentation of monitoring projects, and support coordination and integration of monitoring efforts. Use of the tools is voluntary. Use of this website is estimated to be about 1 hour per response. A Federal agency may not conduct or sponsor, and a person is not required to respond to a collection of information unless it displays a currently valid OMB control number. Comments regarding this collection of information should be directed to: Bureau Clearance officer, U.S. Geological Survey,