Arkansas River at Lamar
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
- Warning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
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Observed (OBS) 04/04/2025 6:00 PM MDTCATEGORY STAGE 
Major Flooding 15 ft Moderate Flooding 13 ft Minor Flooding 11 ft Action 9 ft Reliability of the Forecast:
NOTE: Forecasts are issued as needed during times of high water, but are not routinely available.
River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.
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
- 25 - Major flooding occurs in Lamar. Multiple homes and businesses are impacted. Water reaches the base of the Highway 287 Bridge.
- 19 - Flood waters inundate the industrial park on the north side of Lamar. Multiple businesses are impacted. Flood waters threaten The Days Inn, The Cow Palace, Ranchers Supply Company and Opals Pub. Gravel and paving operations and North Gateway Park near the Highway 287 Bridge are inundated.
- 18 - Flood waters threaten the All Rite Paving and Redi Mix operation on the northwest side of the Highway 287 Bridge.
Gauge Location
Recent Crests
| 1. | 11.13 ft | on 07-22-2023 | (P) |
| 2. | 11.01 ft | on 07-26-2018 | (P) |
| 3. | 11.41 ft | on 07-30-2014 | |
| 4. | 11.01 ft | on 07-27-2009 | |
| 5. | 9.29 ft | on 08-29-2002 |
Recent Crests
| 1. | 11.13 ft | on 07-22-2023 | (P) |
| 2. | 11.01 ft | on 07-26-2018 | (P) |
| 3. | 11.41 ft | on 07-30-2014 | |
| 4. | 11.01 ft | on 07-27-2009 | |
| 5. | 9.29 ft | on 08-29-2002 | |
| 6. | 10.63 ft | on 06-08-2001 | |
| 7. | 11.11 ft | on 06-07-1999 | |
| 8. | 12.47 ft | on 07-31-1998 | |
| 9. | 12.79 ft | on 08-12-1997 | |
| 10. | 13.06 ft | on 05-27-1996 | |
| 11. | 11.09 ft | on 06-04-1995 | |
| 12. | 10.02 ft | on 08-14-1994 | |
| 13. | 8.95 ft | on 07-21-1992 | |
| 14. | 8.82 ft | on 09-15-1988 | |
| 15. | 10.74 ft | on 05-25-1987 |
Historic Crests
| 1. | 13.06 ft | on 05-27-1996 | |
| 2. | 12.79 ft | on 08-12-1997 | |
| 3. | 12.47 ft | on 07-31-1998 | |
| 4. | 11.41 ft | on 07-30-2014 | |
| 5. | 11.13 ft | on 07-22-2023 | (P) |
Historic Crests
| 1. | 13.06 ft | on 05-27-1996 | |
| 2. | 12.79 ft | on 08-12-1997 | |
| 3. | 12.47 ft | on 07-31-1998 | |
| 4. | 11.41 ft | on 07-30-2014 | |
| 5. | 11.13 ft | on 07-22-2023 | (P) |
| 6. | 11.11 ft | on 06-07-1999 | |
| 7. | 11.09 ft | on 06-04-1995 | |
| 8. | 11.01 ft | on 07-26-2018 | (P) |
| 9. | 11.01 ft | on 07-27-2009 | |
| 10. | 10.74 ft | on 05-25-1987 | |
| 11. | 10.63 ft | on 06-08-2001 | |
| 12. | 10.02 ft | on 08-14-1994 | |
| 13. | 9.29 ft | on 08-29-2002 | |
| 14. | 8.95 ft | on 07-21-1992 | |
| 15. | 8.82 ft | on 09-15-1988 |
Vertical Datum Table
| type | NGVD29 |
|---|---|
| major Flooding | 3612.39 ft |
| moderate Flooding | 3610.39 ft |
| minor Flooding | 3608.39 ft |
| action | 3606.39 ft |
| Latest Value | 3602.76 ft |
| Gauge Zero | 3597.39 ft |
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.