Precipitation Maps - Western Regional Climate Center

PRISM Precipitation Maps: 1961-90

Courtesy of Oregon Climate Service

Maps from OCS server.
Maps and data from NRCS server.

Note: These maps display best with a 1024 by 768 or higher screen size.

United States

Click on * for more detailed map (file may be much larger and require longer downloading)

Western States	Central and Mid-western States	Eastern and Southeastern States	Regional WRCC Maps	Regional WRCC Maps Percent of Annual
Western U.S.	Arkansas *	Alabama *	Western U.S.	January
Alaska	Illinois *	Connecticut *	Western U.S. (Oct.-Mar.)	February
Arizona *	Indiana *	Delaware *	Central Rockies	March
California *	Iowa *	Florida *	Great Basin	April
California, Northern	Kansas *	Georgia *	Northern Rockies	May
California, Southern	Louisiana *	Kentucky *	Pacific Northwest	June
Colorado *	Michigan *	Maine *	Southern Rockies	July
Hawaii (unavailable)	Minnesota *	Maryland *	Southwest	August
Idaho *	Missouri *	Massachusetts *	Desert SW - Scale 1	September
Montana *	Nebraska *	Mississippi *	Desert SW - Scale2	October
New Mexico *	North Dakota *	New Hampshire *	Hawaii Island	November
Nevada *	Ohio *	New Jersey *	Kauai Island	December
Oregon *	Oklahoma *	New York *	Maui Island	April-June
Utah *	South Dakota *	North Carolina *	Molokai & Lanai Islands	July-August
Washington *	Texas *	Pennsylvania *	Oahu Island	October-March
Wyoming *	Wisconsin *	Rhode Island *
		South Carolina *
		Tennessee *
		Vermont *
		Virginia *
		West Virginia *

Non-regional WRCC maps produced by Oregon Climate Service (OCS) and National Resource Conservation Service (NRCS)
Regional WRCC maps produced by WRCC from PRISM data set provided by Oregon Climate Service (OCS)

Published Articles:

C. Daly, R.P. Neilson, and D.L. Phillips, 1994. A statistical-topographic model for mapping climatological precipitation over mountainous terrain. J. Appl. Meteor., 33(2), 140-158.

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Western Regional Climate Center, wrcc@dri.edu