This dataset contains spatially gridded average monthly and annual precipitation for the climatological period 1971-2000. Distribution of the point measurements to a spatial grid was accomplished by using the PRISM model, developed and applied by Chris Daly of Oregon State University (OSU) PRISM Group.
Display and/or analyses requiring spatially distributed monthly or annual precipitation for the climatological period 1971-2000.
Climatological period from which the point observations were taken.
None
These data were not checked by the U.S. Geological Survey for accuracy or completeness. Should a question of accuracy or completeness arise, the user should contact the originator cited in the metadata.
All data were based on the same averaging period (1971-2000). Similar quality assurance procedures were used with all input datasets.
Point estimates of precipitation originated from some or all of the following sources: 1) National Weather Service (NWS) Cooperative (COOP) stations, 2) Natural Resources Conservation Service (NRCS) Snowpack Telemetry (SNOTEL), 3) United States Forest Service (USFS) and Bureau of Land Management (BLM) Remote Automated Weather (RAWS) Stations, 4) Bureau of Reclamation (AGRIMET) stations, 5) California Data Exchange Center (CDEC) stations, 6) Storage gages, 7) NRCS Snowcourse stations, 8) Other State and local station networks, 9) Estimated station data, 10) Canadian stations, 11) Upper air stations, and 12) NWS/Federal Aviation Administration (FAA) Automated surface observation stations (ASOS). All COOP station data were subjected to quality-control checks by the National Climatic Data Center (NCDC). All COOP, SNOTEL and other data were subjected to further quality control checks by the PRISM Group.
Accuracy of this dataset is based on the original specification of the Defense Mapping Agency (DMA) 1 degree digital elevation models (DEM). The stated accuracy of the original DEMs are 130 meter circular error with 90 percent probability.
The broad DMA production
Nationwide dataset clipped to the extent of the state of Oklahoma.
202 NW 66th St., Bldg. 7
Original raster dataset of average annual precipitation (1971-2000) in values of millimeters was converted to values of inches.
202 NW 66th St., Bldg. 7
spatially gridded average precipitation values
2000 Kelley Engineering Center
Oregon State University
This digital dataset publication was prepared by the PRISM Group. Neither the PRISM Group nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or misuse of the data, or for damage, transmission of viruses or computer contamination through the distribution of these datasets or for the usefulness of any information, apparatus, product, or process disclosed in this report, or represents that the use would not infringe on privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply the endorsement, recommendation, or favoring by the PRISM Group or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the PRISM Group or any agency thereof.
2000 Kelley Engineering Center