Bill Williams River at Alamo Lake
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Upstream gauge unavailableDownstream gauge unavailableWarning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
Traces and Thresholds Click to turn on/off display
Observed (OBS) 06/21/2025 2:00 AM MSTRecord: 46 ftCATEGORY STAGE 
Major Flooding 1265 ft Minor Flooding 1235 ft Action 1235 ft Reliability of the Forecast:
NOTE: Forecasts are not available. Only observed stages are available for this point.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 1265 - Water reaches the embankment crest elevation at the top of the dam. The dam crest length is 283 feet.
- 1235 - Water reaches the spillway crest elevation. Crest length is 284 feet.
Gauge Location
Recent Crests
| 1. | 30.80 ft | on 08-29-1951 |
| 2. | 23.00 ft | on 03-14-1941 |
| 3. | 22.50 ft | on 03-02-1941 |
| 4. | 39.60 ft | on 09-06-1939 |
| 5. | 46.00 ft | on 02-07-1937 |
Recent Crests
| 1. | 30.80 ft | on 08-29-1951 |
| 2. | 23.00 ft | on 03-14-1941 |
| 3. | 22.50 ft | on 03-02-1941 |
| 4. | 39.60 ft | on 09-06-1939 |
| 5. | 46.00 ft | on 02-07-1937 |
Historic Crests
| 1. | 46.00 ft | on 02-07-1937 |
| 2. | 39.60 ft | on 09-06-1939 |
| 3. | 30.80 ft | on 08-29-1951 |
| 4. | 23.00 ft | on 03-14-1941 |
| 5. | 22.50 ft | on 03-02-1941 |
Historic Crests
| 1. | 46.00 ft | on 02-07-1937 |
| 2. | 39.60 ft | on 09-06-1939 |
| 3. | 30.80 ft | on 08-29-1951 |
| 4. | 23.00 ft | on 03-14-1941 |
| 5. | 22.50 ft | on 03-02-1941 |
Gauge Photos
No Images Found
Probability Information
No Images Available
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
Resources
Hydrologic Resource Links
- River Forecast Centers
- Text Products
- Past Precipitation
- Forecast Precipitation
- Colorado Basin RFC
- Flood Control District of Maricoipa County
- USGS Real-time Data - Arizona
- USGS Real-time Data - California
- Arizona Flood Warning System
- Salt River Project Water Resources Info
- CAP - Lake Pleasant
- USACE - Arizona / So Cal Projects
- USBR - Lower Colorado River Operations
- Inundation Mapping Locations