In order to help ensure that this web analysis page remains available, we would greatly appreciate feedback on its use, particularily in the clasroom, for presentations or for research. Mail to Cathy Smith at (cathy.smith@noaa.gov).
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Background Information
The building maintenance scheduled for Friday February 27th at 5:00pm MST has been postponed until 5:00pm March 6th. PSD's website will be down during the maintenance.
  PSD no longer makes the V1 version of the 20th Century Reanalysis available. Please try the V2 monthly composite page or access the data at NCAR.