Observing and Understanding the Variability of Water in Weather and Climate
17TH Conference on Hydrology


Updating NOAA/NWS Rainfall Frequency Atlases

Geoffrey M. Bonnin, NOAA/NWS, Silver Spring, MD; and B. Lin and T. Parzybok

The rainfall frequency atlases and technical papers published by the National Oceanic and Atmospheric Administration's (NOAA) National Weather Service (NWS) serve as national standards for rainfall intensity at specified frequencies and durations in the United States. The current standards were published between 1961 and 1973. The NWS is updating the standards for the semiarid southwest, the Ohio River basin and surrounding states, Hawaii, Puerto Rico, and the Virgin Islands. The Hydrometeorological Design Studies Center located within the NWS Office of Hydrologic Development is responsible for the updates and its work is funded by contributions from other Federal, State and local agencies. This paper provides an overview of the technology and data improvements used in the updates including: use of significantly longer data records than were available in the 1960/70s and emphasizing data quality control and consistency, use of a regional L-moments analysis technique, a spatial interpolation-based mapping procedure using a statistical-geographic approach, and web-based delivery of the final product.

extended abstract  Extended Abstract (160K)

Supplementary URL: http://www.nws.noaa.gov/oh/hdsc

Joint Session 3, Instrumentation and Remote Sensing to Observe Water in all its Phases (Joint with the Symposium on Observing and Understanding the Variability of Water in Weather and Climate and the 17th Conference on Hydrology)
Tuesday, 11 February 2003, 8:30 AM-5:30 PM

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