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USGS Water Data for Pennsylvania

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[!] 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.



Time-series data statistics on Water Data for the Nation vs. USGS publications
The statistics generated on this web site may not match values published by the USGS in various interpretive or data reports for a number of reasons. In general these relate to the fact that the statistics provided on Water Data for the Nation are generated from the daily values upon request. As such, it is not possible to exactly mirror the decisions made by the authors of USGS publications. Some of the most common reasons for differences between statistical values are as follows.

  1. The period of record is different between the statistics from Water Data for the Nation and the published statistics.
  2. The year used may be different
  3. The treatment of partial record may be different
  4. The precision may be different
  5. The statistics themselves are different
  6. The published statistics may combine continuous time-series and discrete data