Design Rainfall

[TankDude]

Does anyone know a good resource for design rainfall maps? I have looked in the ASCE 7-05 but didn't find a map.

 

[JLSeagull]

ICC and BOCA IPC-1997 (International Plumbing Code) include appendices with rainfall rates. Appendix B includes a table of rainfall rates for various cities with rainfall rates in inches per hour based on a storm of one hour duration and 100-year return period. On this basis Pecos, Texas and Albuquerque, NM are much higher than Seatle, WA or Portland, OR.

Find an annual rainfall chart at

http://www-das.uwyo.edu/~geerts/cwx/notes/chap17/rain_usa.html

Poke around the NOAA site to find interesting climatic data. However you may not find the "universal rain chart".

http://www.wrh.noaa.gov/ggw/precip.php

http://www.ncdc.noaa.gov/oa/climate/research/2005/ann/us-summary.html

Good luck.