Atlas of interoccurrence intervals for selected thresholds of daily precipitation in Texas

Water-Resources Investigations Report 2003-4281
In cooperation with the Texas Department of Transportation
By:  and 



A Poisson process model is used to define the distribution of interoccurrence intervals of daily precipitation in Texas. A precipitation interoccurrence interval is the time period between two successive rainfall events. Rainfall events are defined as daily precipitation equaling or exceeding a specified depth threshold. Ten precipitation thresholds are considered: 0.05, 0.10, 0.25, 0.50, 0.75, 1.0, 1.5, 2.0, 2.5, and 3.0 inches. Site-specific mean interoccurrence interval and ancillary statistics are presented for each threshold and for each of 1,306 National Weather Service daily precipitation gages. Maps depicting the spatial variation across Texas of the mean interoccurrence interval for each threshold are presented. The percent change from the statewide standard deviation of the interoccurrence intervals to the root-mean-square error ranges from a magnitude minimum of (negative) -24 to a magnitude maximum of -60 percent for the 0.05- and 2.0-inch thresholds, respectively. Because of the substantial negative percent change, the maps are considered more reliable estimators of the mean interoccurrence interval for most locations in Texas than the statewide mean values.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Atlas of interoccurrence intervals for selected thresholds of daily precipitation in Texas
Series title Water-Resources Investigations Report
Series number 2003-4281
DOI 10.3133/wri034281
Year Published 2003
Language English
Publisher U.S. Geological Survey
Contributing office(s) Texas Water Science Center
Description iv; 204 p.
Country United States
State Texas
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