In 2004 the National Weather Service’s Hydrometeorological Design Studies Center published updated precipitation estimates for much of the United States. NOAA Atlas 14 supercedes previous precipitation estimates such as Technical Memorandum NWS Hydro 35 andTechnical Papers 40 and 49 (TP-40 and TP-49) because the updates are based on more recent and expanded data, current statistical techniques, and enhanced spatial interpolation and mapping procedures. (Bonnin et al., 2003 and NWS, 2004) The “Precipitation-Frequency Atlas of the United States,” NOAA Atlas 14, provides estimates of 2-year through 1000-year storm events for durations ranging from 5 minutes to 60 days (available online at
Users can select precipitation estimates, by entering latitude/longitude coordinates, or by clicking on an interactive map for Precipitation Frequency Data.
Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.”
-Steve