ABRFC Monthly Precipitation Images - National Weather Service  
Monthly/Annual Precipitation Products
Observed Precip Estimate Normal Precipitation Percent-of-Normal
September, 2013 Precip Estimate - Click to enlarge September Normal Precipitation - Click to enlarge September, 2013 Percent-of-Normal Precipitation - Click to enlarge

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These pages graphically describe the monthly and annual precipitation across the ABRFC area of responsibility.

  • "Observed precipitation estimate" images are a composite of all daily precipitation estimates for the specified duration. Since December 1997 the ABRFC has used Process 1 (P1) almost exclusively to create these precipitation estimates.
  • "Normal precipitation" images are reprojections of PRISM climate data. These gridded climate maps are considered the most detailed, highest-quality spatial climate datasets currently available.
  • "Percent-of-Normal" images are the product of dividing each "observed precipitation estimate" grid cell by its "normal precipitation" counterpart.
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  • Page last modified: 22-Aug-2011 3:55 PM UTC