Weather Dictionary / Glossary of Terms

Three-Hour Rainfall Rate


   Weather TermDescription / Definition
   Three-Hour Rainfall Rate This WSR-88D Radar product displays precipitation total (in inches) of the current and past two clock hours as a graphical image. It displays hourly precipitation total (in inches) as a graphical image (polar format with resolution 1.1 nm by 1 degree). It is updated once an hour. It is used to:
1) Assess rainfall intensities and amounts over a longer viewing interval; and
2) Possibly adjust flash flood guidance values since the product corresponds to the timing of Flash Flood Guidance values.


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Data courtesy of NOAA - National Oceanic and Atmospheric Administration