Potomac River at Williamsport
Highest recorded crests
- 48.6 ft on Mar 18, 1936 (historic crest)
- 37.0 ft on Apr 27, 1937 (historic crest)
- 36.3 ft on Nov 6, 1985 (historic crest)
- 36.1 ft on Oct 16, 1942 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 10.5 ft | Water exceeds the banks and covers the road at the end of the boat ramp in Williamsport. |
|---|---|
| 23.0 ft | Water begins to inundate lower portions of the Potomac Fish & Game Club. |
| 25.0 ft | Structures begin to flood at the Potomac Fish and Game Club. |
| 28.0 ft | Water begins to cover the C&O Canal Towpath. |
| 29.0 ft | Water covers most of the C&O Canal towpath and the bridge over the Conococheague Aqueduct. |
| 32.0 ft | Water enters the Williamsport Cushwa visitor center and trolley building in Williamsport. |
| 62.0 ft | 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. |
Forecast office: NWS Sterling · River Forecast Center: Middle Atlantic River Forecast Center.
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Nearby stations and gauges
- Conococheague Creek at Fairview NWS gauge · 7.5 mi
- Marsh Run at Grimes NWS gauge · 7.5 mi
- Rockymarsh Run at Scrabble NWS gauge · 8.8 mi
- Licking Creek at Pecktonville NWS gauge · 11.4 mi
- Tuscarora Creek above Martinsburg NWS gauge · 11.7 mi
- Back Creek near Jones Springs NWS gauge · 12.1 mi