Water reaches the top of the Hancock boat ramp and begins to spill over into the adjacent parking lot. NAD83/WGS84. River Stage Reference Frame Gauge Height Flood Stage Uses; NWS stage: 0 ft : 3.3 ft : Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps : Vertical Datum Elevation (gauge height = 0) Elevation (gauge height = flood stage) Elevation information source; NAVD88: 0.00: … The river was cresting at that hour. For details. 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. Water begins to overflow into low lying areas. 18, 1936, to Jan. 20, 1937, nonrecording gage, on former highway bridge just upstream at same gage datum. Search by city or zip code. Water approaches the highest point on Main Street. ... --Water-stage recorder, crest-stage gage, and concrete control. Note: Use the official hydrograph at the top of this web page Oct. 1, 1932, to Jan. 5, 1935, Mar. Most of the C&O Canal towpath downstream of Pennyfield is flooded. LOUDOUN COUNTY, Va. (WUSA9) — Water levels rose along the banks of the Potomac River Saturday night. If you notice any errors in the below information, please contact our. Through analysis by the Morgan County Emergency Management Agency, and observations during a high water event in 2018, it has been determined that the existing minor flood stage of 30 feet (the point at which roads or public property begins to be affected) is significantly too high. The Potomac River rose 10 feet above flood stage, submerging much of DC's low-lying areas, including Haines Point and the Navy Yard and Naval Air Station. Water overflows the overlooks at Great Falls National Park and approaches the lower level of the visitors center. Water floods 25 to 30 homes along the West Virginia side of the river just downstream from Hancock, and at least another 20 to 30 in Hancock itself. Water begins flowing out of the open tunnel between the Potomac and lower town Harpers Ferry, flooding the very end of Shenandoah Street. for river levels within the next 72 hours. Datum of gage is 383.00 ft above North American Vertical Datum of 1988. EXTREMES OUTSIDE PERIOD OF RECORD. Latitude: 39.697500° N, Historical Floods: Potomac River at Point of Rocks, MD Latitude: 39.274 Longitude: -77.543 Last Flood: 12/17/2018 Period of Record: 1889-Present Flood Stage: 16 Number of Floods: 121 Date of Flood Crest (ft) Streamflow (cfs) Category Code Date of Flood Crest (ft) Streamflow (cfs) Category Code 6/2/1889 40.2 460,000 Major C1 G1 Flood stage at the time in the shallow riverbed was only 7 feet. The system reduces flood risk for Potomac River flow rates up to 700,000 cubic feet per second. Water goes over the banks of the Potomac near the mouth of the Opequon River. River Observations & Forecasts; Watches & Warnings; MARFC River Forecast Products; River & Lakes Summaries; 5 Day Significant Flood Outlook; Briefings and Discussions; Flash Flood Guidance; Ensemble Forecasts; Event Briefings; National River and Lake Observations and Forecasts; Observed River Stages Maps is the approximate location based on the latitude/longitude coordinates COOPERATION. Press enter or select the go button to submit request, Used to Estimate the Chance of Flooding and Fast moving water and changing currents can be expected. 20.5 Press enter or select the go button to submit request, Used to Estimate the Chance of Flooding and Longitude: 78.177778° W, At Point of Rocks, flood stage is … Water begins to affect portions of the Billy Goat Trail between Great Falls and Carderock. Water reaches the retaining wall at Overlook 1 at Great Falls National Park but does not overtop it. There is approximately a foot of water in the clubhouse on Sycamore Island. USGS 01613000 POTOMAC RIVER AT HANCOCK, MD. Additionally, access to Potomac Airpark may be restricted due to backwater. Water covers the towpath between Swains Lock and Pennyfield Lock, mileposts 17 to 19 on the C&O Canal. Portions of the Potomac Heritage Trail begin to flood. Datum of gage is 37.20 ft above North American Vertical Datum of 1988. Water begins to flood low spots of West Main Street in Hancock. The west end of the Potomac Airpark runway begins to flood. Horizontal Datum: The Potomac River runs 405 miles (652 km) from Fairfax Stone Historical Monument State Park in West Virginia on the Allegheny Plateau to Point Lookout, Maryland, and drains 14,679 square miles (38,020 km 2).The length of the river from the junction of its North and South Branches to Point Lookout is 302 miles (486 km). The information below shows the Potomac River level in Harpers Ferry, WV at a glance. Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps, Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps, Older USGS topographic maps, NGVD29 benchmarks, Older USGS topographic maps, MSL benchmarks. Water begins to inundate some yards on the west end of Hancock. Water floods low spots on East Main Street in Hancock. 5: Portions of the Potomac Heritage Trail begin to flood. PROVISIONAL DATA SUBJECT TO REVISION. Note: Need to Confirm from primary sources: John Bowman (2009) Wheeling - The Birthplace of the American Steamboat. the Range of Possible River Levels, Weather Forecast Office (Baltimore/Washington) Sterling, VA, Chance of Exceeding Levels During Entire Period, Short-term Probabilistic Guidance (Experimental), U.S. Geological Survey (USGS) Data and Site Info for Hancock. 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