USGS Current Water Data for Virginia
During cold weather, ice effects on stage and
discharge determinations at some stream-gaging stations are likely.
Data values reported on these pages may be significantly higher or
lower than actual values. Adjustment of data for ice effects can
only be done after detailed analysis. Users are encouraged to
contact this office for more information on specific
sites.
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The colored dots on this map depict streamflow conditions as a
percentile, which is computed from the period of record for the
current day of the year. Only stations with at least 30 years of
record are used.
The gray circles indicate other stations that were not ranked in
percentiles either because they have fewer than 30 years of record or
because they report parameters other than streamflow. Some stations,
for example, measure stage only.
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Statewide Streamflow Real-Time TableStatewide Ground-Water Real-Time TableStatewide Water-Quality Real-Time TableReal-time data typically are recorded at 15-60 minute intervals, stored onsite, and then transmitted to USGS offices every 1 to 4 hours, depending on the data relay technique used. Recording and transmission times may be more frequent during critical events. Data from real-time sites are relayed to USGS offices via satellite, telephone, and/or radio and are available for viewing within minutes of arrival. All real-time data are provisional and subject to revision.
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