South Fork Shenandoah River near Lynnwood, Rockingham County VA (LYWV2)
Gage Location: Rockingham County, VirginiaSite Location: Rockingham County, Virginia
Latitude: 38.323Longitude: -78.755Elevation: 1013.17 ft. MSLDrainage Area: 1079 Sq. Mi.
Minor Stage: 16 ft. Moderate Stage: 17 ft.Major Stage: 20 ft.
First Flood: 1934-12-01Last Flood: 2011-04-17 Crest: 19.93 ft.Datum change: 1930-09-30Number of Floods: 32

Click on table headers to sort
Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1934-12-0121.6245600Majornone
1936-03-1826.5777000Majornone
1937-04-2620.4839800Majornone
1940-08-1719.8633100Moderatenone
1942-05-1616.9723200Minornone
1942-05-2220.3736300Majornone
1942-10-1527.280000Majornone
1945-09-1821.742800Majornone
1948-12-0416.421500Minornone
1949-06-1823.653600Majornone
1950-12-0416.220900Minornone
1950-12-0816.8822900Minornone
1955-08-1822.9446800Majornone
1971-05-3019.4331700Moderatenone
1972-06-2223.4550700Majornone
1972-10-0621.9242600Majornone
1975-03-1920.4435800Majornone
1976-10-0917.9926500Moderatenone
1978-01-2616.7422700Minornone
1979-09-0617.8926200Moderatenone
1985-11-0529.4695100Majornone
1987-04-1719.2933900Moderatenone
1992-04-2217.9128700Moderatenone
1993-03-0419.4534500Moderatenone
1996-01-1924.8862500Majornone
1996-09-0730.84107000Majornone
1998-02-1817.4927600Moderatenone
2003-09-1922.448400Majornone
2004-09-2918.9232900Moderatenone
2005-11-3017.8128700Moderatenone
2010-01-2519.0933600Moderatenone
2011-04-1719.9337000Moderatenone



Codes and description

C1|Crest information during this period may be incomplete and therefore was not used in frequency calculations. Some of the floods are based on current flood stage and nearby gage information.
C2|Crest information during this period looks reliable despite potential problems. This data was used in frequency calculations.
C3|Crest height estimated by the USGS.
C4|Crest height is from the National Weather Service.
C5|Crest height affected by backwater.
C6|Crest occurred at a previous flood stage that is lower than the current flood stage. The crests below the new flood stage are not used in flood frequency calculations.
C7|Crest from USGS yearly peak and/or date is different than the crest we provide. In many cases MARFC uses crest based on backwater or ice effects.
C8|Crest month or day of occurrence has been estimated by The Middle Atlantic River Forecast Center usually based on nearby gage information.
C9|Crest date (day) in the month is unknown.
F1|Flow is an estimate.
F2|Flow affected by regulation or diversion and in some cases to an unknown degree.
F3|Flow effected by snow-melt, ice jam or debris jam break up.
F4|Flow affected by dam failure.
F5|Flow - All or part of the record affected by urbanization, mining, agricultural changes, channelization or other factors.
G1|Gage height at a different site and/or datum.
G2|Gage is not an official USGS gage with crests provided by the NWS. Crest information looks unreliable and incomplete and not used in flood frequency calculations.
G3|Gage datum changed during this year.
none,No code; Good Data

Updated: 07:31 AM Dec 19, 2014