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This probabilistic forecast is issued by the Ohio River Forecast Center.
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About this graph
Forecasts for the New River at Allisonia are issued routinely year-round.
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Downstream Gauge Downstream Gauge - at Radford
Zoom Level:15
Flood Categories (in feet)
Major Flood Stage: 17
Moderate Flood Stage: 13
Flood Stage: 8
Action Stage: 7
Low Stage (in feet): 0

Historic Crests
(1) 23.42 ft on 08/14/1940
(2) 16.59 ft on 11/07/1977
(3) 16.56 ft on 01/15/1995
(4) 15.68 ft on 09/22/1989
(5) 15.12 ft on 10/12/2018
(6) 14.16 ft on 05/22/2020
(7) 13.72 ft on 06/05/1992
(8) 12.73 ft on 11/19/2003
(9) 12.69 ft on 08/17/1994
(10) 12.44 ft on 01/19/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.10 ft on 11/12/2020 (P)
(2) 6.73 ft on 10/30/2020
(3) 14.16 ft on 05/22/2020
(4) 11.26 ft on 04/13/2020
(5) 10.47 ft on 02/07/2020
(6) 7.44 ft on 06/10/2019
(7) 8.53 ft on 04/20/2019
(8) 10.64 ft on 02/23/2019
(9) 15.12 ft on 10/12/2018
(10) 11.52 ft on 09/17/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.92 ft on 10/05/2007
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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
13 Several summer homes along the river are flooded with possibly significant damage.
10 Water is several feet deep along portions of Clarks Ferry Road, Route 653.
9 Parts of Julia Simpkins Road, Route 693 on the right bank are cut off.
8 River begins to overflow the left bank and affect Clarks Ferry Road, Route 653.
7.5 Water begins to cover the road at 1620 Julia Simpkins Road with access to three home possibly affected.
7 Water starts to cover parts of Clarks Ferry Road at 4491 and 4661 with access to 16 homes potentially affected.
(1) USGS Gage House - Dir. E: Date - 10/5/2007
(2) Upstream - Dir SW: 10/5/2007; Stage - 0.92' (586 cfs)
(3) Downstream - Dir. NE: 10/5/2007; Record low flow for date

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 7 Day (NAEFS) 7 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics.

Click individual graphics to enlarge.

Collaborative Agencies Collapse
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.
NWS Information
National Weather Service
Blacksburg Weather Forecast Office
1750 Forecast Drive
Blacksburg, VA 24060
(540) 552-0084
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Page last modified: 2-Nov-2020 7:30 PM
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