REAL-TIME HYDROLOGIC DATA SOURCES

The following are links to agencies, organizations, and groups that operate real-time hydrologic data collection, information, and warning systems. 

UNITED STATES

Alabama

• Choctawhatchee, Pea, and Yello Rivers Watershed Management Authority

Arizona

• Arizona Flood Warning System
• City of Flagstaff
• Cochise County Flood Control District
• Flood Control District of Maricopa County (Phoenix Metro Area)
• Greenlee County
• Mohave County Flood Control District
• Navajo County Public Works (Database Interrogation), Google Data Map
• Nogales Arizona/Sonora ALERT System
• Pima County Regional Flood Control District (Tucson Metro Area)
• Pinal County Flood Control District
• Santa Cruz County, Arizona
• Yavapai County Flood Control District

Arkansas

• Buffalo National River

California

• Los Angeles County Department of Public Works
• Marin County Flood Control and Water Conservation District (San Francisco Bay area)
• County of Orange, OC Public Works (Greater Los Angeles area)
• City of Roseville
• San Bernandino County
• San Diego County Flood Control District
• Santa Clara Valley Water District (San Francisco Bay area)
• Ventura County Watershed Protection District

Colorado

• Colorado Hazard and Risk Map
• City of Fort Collins
• Mile High Flood District

Delaware

• Delware River Basin Commission
• Delaware Coastal Flood Monitoring System

Florida

• Florida Division of Emergency Management
• Martin County
• Monroe County
  

Illinois

• Kane County Emergency Alerts

Indiana

• City of Anderson
• City of Fort Wayne

Kansas

• City of Overland Park

Nebraska

• City of Lincoln

Nevada

• Clark County Regional Flood Control District (Las Vegas Metro area)

New Jersey

• Stevens Institute of Technology-Center for Maritime Systems (Coastal Monitoring Network)

Oklahoma

• City of Tulsa

Texas

• Austin, TX
• Bexar County (San Antonio), TX
• City of Dallas Flood Control District
• Harris County Homeland Security and Emergency Management (Houston Metro area)
• Lower Colorado River Authority
• Rice University TMC Flood Alert System

Virginia

• Roanoke County Emergency Preparedness

Washington

• King County
• City of Issaquah
• Snohomish County

West Virginia

• WV Dept. of Military Affairs & Public Safety

Federal Agencies

DEPARTMENT OF THE ARMY

United States Army Corps of Engineers (USACE)

• Navigation Data
• Flood Risk Management

DEPARTMENT OF COMMERCE

National Oceanic and Atmospheric Administration (NOAA)

• NOAA Storm Prediction Center
• NWS Automated Flood Warning System Website
• National Severe Storms Laboratory
• Advanced Hydrologic Prediction System--NWS
• National Snow Analyses--NOHRSC
• National Buoy Data Center
• Tides and Currents
• River Forecast Center

DEPARTMENT OF INTERIOR

Bureau of Reclamation (BOR)

• Dams & Reservoirs--(clickable regional map)
• SNOTEL stations 

U.S. Geological Survey (USGS)

• Waterwatch--comprehensive water hazards page
• Water Alert
• Droughts
• Floods and High Flow locations
• Water Resources of the United States--(from NWISWeb)
• Natural Hazards Support System--includes wildfire information
• Natural Hazards Gateway--includes seismic and tsunami information
  

INTERNATIONAL

• Parramatta River Catchment Group--Australia
• Murray-Darling Basin Authority--Australia
• Environment Canada
• Caribbean Nations real-time streamflow (via USGS Caribbean WSC)
• Rivers of China
• Lakes and Reservoirs of China
• Federal Institute of Hydrology--Germany
• Meteorological Service of Jamaica
• Sub-Saharan Africa and the OECD--Africa