Potomac River at Williamsport
Critical Stages
Action
Flood
Moderate
Major
Latest Observation
Updated: 6:00 AM EST 12/15/25
Status: Not Defined
Stage: 1.58 ft
Flow: -999 kcfs
Forecast
Forecast not available for this location.
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 6:00 AM 12/15 | 1.58 | -999 |
| 6:00 AM 12/14 | 1.76 | -999 |
| 6:00 AM 12/13 | 1.76 | -999 |
| 6:00 AM 12/12 | 1.78 | -999 |
| 6:00 AM 12/11 | 1.76 | -999 |
| 6:00 AM 12/10 | 1.83 | -999 |
| 6:00 AM 12/9 | 1.65 | -999 |
| 6:00 AM 12/8 | 1.83 | -999 |
| 6:00 AM 12/7 | 1.83 | -999 |
| 6:00 AM 12/6 | 1.86 | -999 |
| 6:00 AM 12/5 | 1.88 | -999 |
| 6:00 AM 12/4 | 1.86 | -999 |
| 6:00 AM 12/3 | 1.83 | -999 |
| 6:00 AM 12/2 | 1.81 | -999 |
| 6:00 AM 12/1 | 1.86 | -999 |
| 6:00 AM 11/30 | 1.91 | -999 |
| 6:00 AM 11/29 | 1.96 | -999 |
| 6:00 AM 11/28 | 1.99 | -999 |
| 6:00 AM 11/27 | 1.96 | -999 |
| 6:00 AM 11/26 | 1.88 | -999 |
| 6:00 AM 11/25 | 1.86 | -999 |
| 6:00 AM 11/24 | 1.91 | -999 |
| 6:00 AM 11/23 | 1.88 | -999 |
| 6:00 AM 11/22 | 1.81 | -999 |
| 6:00 AM 11/21 | 1.73 | -999 |
| 6:00 AM 11/20 | 1.7 | -999 |
| 6:00 AM 11/19 | 1.7 | -999 |
| 6:00 AM 11/18 | 1.65 | -999 |
| 6:00 AM 11/17 | 1.65 | -999 |
| 6:00 AM 11/16 | 1.68 | -999 |
62' -
Water begins to flood the R.C. Wilson water treatment plant. The plant will flood at a lower level if the levee protection is breached.
32' -
Water enters the Williamsport Cushwa visitor center and trolley building in Williamsport.
29' -
Water covers most of the C&O Canal towpath and the bridge over the Conococheague Aqueduct.
28' -
Water begins to cover the C&O Canal Towpath.
25' -
Structures begin to flood at the Potomac Fish and Game Club.
23' -
Water begins to inundate lower portions of the Potomac Fish & Game Club.
10.5' -
Water exceeds the banks and covers the road at the end of the boat ramp in Williamsport.
| Date | Stage (ft) |
|---|---|
| Mar 18, 1936 | 48.6 |
| Apr 27, 1937 | 37 |
| Nov 6, 1985 | 36.3 |
| Oct 16, 1942 | 36.1 |
| Jan 20, 1996 | 34.8 |
| Jun 23, 1972 | 34 |
| Sep 8, 1996 | 31.1 |
| May 13, 1932 | 26.5 |
| Oct 9, 1976 | 25 |
| Mar 15, 2010 | 24.9 |
| Jun 4, 2018 | 24.49 |
| May 19, 2011 | 22.9 |
Data provided by the National Weather Service.
