Western Branch at Upper Marlboro
No watches, warnings or advisories are in effect for this area.
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) 04/13/2025 3:15 PM EDTRecord: 21.2 ftCATEGORY STAGE 
Major Flooding 19 ft Moderate Flooding 16 ft Minor Flooding 11 ft Action 9 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
- 21 - More than a quarter mile of US 301 is flooded. Several businesses south of Maryland Route 4 are flooded with significant damage likely. A small portion of the lower grounds of the Prince Georges Equestrian Center floods. Water approaches the westernmost and lowermost portion of the Prince Georges County Courthouse.
- 19 - US 301 begins to flood from the bridge northward to the intersection with Marlboro Square Shopping Center. Nearby businesses begin to flood. Marlboro Pike/Main Street also floods at the river, with water approaching nearby homes and businesses.
- 16 - Floodwaters reach the parking lot of businesses off US 301. Water also approaches the southern perimeter of the Prince Georges Equestrian Center grounds.
Gauge Info
| Coordinates | 38.8142, -76.7486 |
| RFC | MARFC |
| State | MD |
| WFO | LWX |
| County | Prince Georges |
| Data Provider(s) | |
| US Geological Survey | USGS--Water Resources of the United States |
| USGS | 01594526 |
Gauge Location
Recent Crests
| 1. | 15.03 ft | on 01-10-2024 | (P) |
| 2. | 13.61 ft | on 12-18-2023 | (P) |
| 3. | 11.43 ft | on 12-16-2022 | (P) |
| 4. | 11.43 ft | on 12-16-2022 | (P) |
| 5. | 13.29 ft | on 08-11-2022 | (P) |
Recent Crests
| 1. | 15.03 ft | on 01-10-2024 | (P) |
| 2. | 13.61 ft | on 12-18-2023 | (P) |
| 3. | 11.43 ft | on 12-16-2022 | (P) |
| 4. | 11.43 ft | on 12-16-2022 | (P) |
| 5. | 13.29 ft | on 08-11-2022 | (P) |
| 6. | 11.94 ft | on 10-30-2021 | |
| 7. | 11.68 ft | on 06-15-2021 | |
| 8. | 15.07 ft | on 07-07-2020 | |
| 9. | 11.50 ft | on 07-12-2019 | (P) |
| 10. | 12.21 ft | on 07-09-2019 | (P) |
| 11. | 11.90 ft | on 03-22-2019 | |
| 12. | 13.40 ft | on 12-16-2018 | |
| 13. | 11.95 ft | on 08-22-2018 | |
| 14. | 13.05 ft | on 07-22-2018 | |
| 15. | 15.17 ft | on 06-04-2018 | |
| 16. | 12.75 ft | on 05-18-2018 | |
| 17. | 13.22 ft | on 02-12-2018 | |
| 18. | 13.39 ft | on 07-29-2017 | |
| 19. | 11.53 ft | on 02-25-2016 | |
| 20. | 11.65 ft | on 06-28-2015 | |
| 21. | 14.85 ft | on 05-01-2014 | |
| 22. | 12.36 ft | on 10-12-2013 | |
| 23. | 11.27 ft | on 07-12-2013 | |
| 24. | 15.26 ft | on 10-30-2012 | |
| 25. | 14.24 ft | on 11-08-2011 | |
| 26. | 21.18 ft | on 09-08-2011 | |
| 27. | 16.81 ft | on 08-28-2011 | |
| 28. | 11.72 ft | on 03-11-2011 | |
| 29. | 13.50 ft | on 12-26-2009 | |
| 30. | 9.50 ft | on 05-07-2009 | |
| 31. | 18.55 ft | on 05-12-2008 | |
| 32. | 15.05 ft | on 11-17-2006 | |
| 33. | 12.31 ft | on 06-26-2006 | |
| 34. | 13.04 ft | on 05-20-2005 | |
| 35. | 11.82 ft | on 02-07-2004 | |
| 36. | 13.00 ft | on 02-23-2003 | |
| 37. | 10.34 ft | on 12-17-2000 | |
| 38. | 10.11 ft | on 09-26-2000 | |
| 39. | 15.39 ft | on 09-16-1999 | |
| 40. | 12.62 ft | on 02-05-1998 | |
| 41. | 11.98 ft | on 05-26-1997 | |
| 42. | 13.20 ft | on 01-19-1996 | |
| 43. | 11.16 ft | on 03-09-1995 | |
| 44. | 12.80 ft | on 03-03-1994 | |
| 45. | 9.06 ft | on 01-20-1988 | |
| 46. | 10.15 ft | on 12-25-1986 |
Historic Crests
| 1. | 21.18 ft | on 09-08-2011 |
| 2. | 18.55 ft | on 05-12-2008 |
| 3. | 16.81 ft | on 08-28-2011 |
| 4. | 15.39 ft | on 09-16-1999 |
| 5. | 15.26 ft | on 10-30-2012 |
Historic Crests
| 1. | 21.18 ft | on 09-08-2011 | |
| 2. | 18.55 ft | on 05-12-2008 | |
| 3. | 16.81 ft | on 08-28-2011 | |
| 4. | 15.39 ft | on 09-16-1999 | |
| 5. | 15.26 ft | on 10-30-2012 | |
| 6. | 15.17 ft | on 06-04-2018 | |
| 7. | 15.07 ft | on 07-07-2020 | |
| 8. | 15.05 ft | on 11-17-2006 | |
| 9. | 15.03 ft | on 01-10-2024 | (P) |
| 10. | 14.85 ft | on 05-01-2014 | |
| 11. | 14.24 ft | on 11-08-2011 | |
| 12. | 13.61 ft | on 12-18-2023 | (P) |
| 13. | 13.50 ft | on 12-26-2009 | |
| 14. | 13.40 ft | on 12-16-2018 | |
| 15. | 13.39 ft | on 07-29-2017 | |
| 16. | 13.29 ft | on 08-11-2022 | (P) |
| 17. | 13.22 ft | on 02-12-2018 | |
| 18. | 13.20 ft | on 01-19-1996 | |
| 19. | 13.05 ft | on 07-22-2018 | |
| 20. | 13.04 ft | on 05-20-2005 | |
| 21. | 13.00 ft | on 02-23-2003 | |
| 22. | 12.80 ft | on 03-03-1994 | |
| 23. | 12.75 ft | on 05-18-2018 | |
| 24. | 12.62 ft | on 02-05-1998 | |
| 25. | 12.36 ft | on 10-12-2013 | |
| 26. | 12.31 ft | on 06-26-2006 | |
| 27. | 12.21 ft | on 07-09-2019 | (P) |
| 28. | 11.98 ft | on 05-26-1997 | |
| 29. | 11.95 ft | on 08-22-2018 | |
| 30. | 11.94 ft | on 10-30-2021 | |
| 31. | 11.90 ft | on 03-22-2019 | |
| 32. | 11.82 ft | on 02-07-2004 | |
| 33. | 11.72 ft | on 03-11-2011 | |
| 34. | 11.68 ft | on 06-15-2021 | |
| 35. | 11.65 ft | on 06-28-2015 | |
| 36. | 11.53 ft | on 02-25-2016 | |
| 37. | 11.50 ft | on 07-12-2019 | (P) |
| 38. | 11.43 ft | on 12-16-2022 | (P) |
| 39. | 11.43 ft | on 12-16-2022 | (P) |
| 40. | 11.27 ft | on 07-12-2013 | |
| 41. | 11.16 ft | on 03-09-1995 | |
| 42. | 10.34 ft | on 12-17-2000 | |
| 43. | 10.15 ft | on 12-25-1986 | |
| 44. | 10.11 ft | on 09-26-2000 | |
| 45. | 9.50 ft | on 05-07-2009 | |
| 46. | 9.06 ft | on 01-20-1988 |
Vertical Datum Table
| type | NAVD88 |
|---|---|
| major Flooding | 23.42 ft |
| moderate Flooding | 20.42 ft |
| minor Flooding | 15.42 ft |
| action | 13.42 ft |
| Latest Value | 7.89 ft |
| Gauge Zero | 4.42 ft |
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
Additional Resource Links
WFO Information
Weather Forecast Office
(Baltimore/Washington) Sterling
43858 Weather Service Rd.
Sterling, VA 20166
Official Homepage