USGS Current Water Data for Pennsylvania
Over the
next year, the USGS Pennsylvania Water Science Center will be updating
the geodetic vertical elevation (gage datum) for many locations. Click
HERE for additional information including a current list of
streamgages with upcoming datum changes. This update in gage datum does
not affect the location of the streamgage, nor the observed local gage
height or discharge recorded at the streamgage.
ICE EFFECTS
ON STREAMFLOW -- During cold weather, stage and discharge values may be
affected by ice at some streamgages. Streamgages experiencing ice
conditions will have the discharge record temporarily disabled to
prevent the display of erroneous discharge values. Display of discharge
record will resume when it is determined that ice conditions are no
longer present. Adjustment of data affected by ice can only be done
after detailed analysis.
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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 Current Conditions 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 current conditions data are provisional and subject to revision.
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