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Quantitative Precipitation Forecast (QPF)

Associated Agencies

NOAA / National Weather Service / National Centers for Environmental Prediction / Weather Prediction Center (WPC)

Forecasters at the WPC and its predecessor organizations have been making Quantitative Precipitation Forecasts since 1960. Quantitative Precipitation Forecasts, or QPFs, depict the amount of liquid precipitation expected to fall in a defined period of time. In the case of snow or ice, QPF represents the amount of liquid that will be measured when the precipitation is melted. Precipitation amounts can vary significantly over short distances, especially when thunderstorms occur, and for this reason QPFs issued by the WPC are defined as the expected "areal average" (on a 20 x 20 km grid) in inches. 

How to

How to use this site:

  • Select the Quantitative Precipitation Forecasts (QPFs) Day/Days of choice
  • Select map to enlarge/save image
  • Below map images, NWS allows you to download WPC QPFs in GRIB2, Shapefiles, or KML formats