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  Home > Water Services > Water Resources > Hydrologic Report >
 2003-2004 HYDROLOGIC REPORT
 Sections
Introduction
Los Angeles County
Flood Control and Water Conservation
Precipitation
Evaporation
Runoff
Reservoirs
Erosion Control
Water Conservation
Acknowledgments
Disclaimer
 Precipitation Contents
Indices 
Active Stations
Daily Rainfall
Location Map
PRECIPITATION
RAINFALL INDICES
 USING SELECTED STATIONS
FOR THE PERIOD OCTOBER 1, 2003 THROUGH SEPTEMBER 30, 2004
Area Percent
of
Area		 Seasonal
Normal
(inches)		 Total
Percipitation
to Date		 Percent of
Seasonnal
Normal
A. Coastal Plain 14.1% 13.71 13.76 56%
B. San Fernando Valley 7.9% 17.62 20.46 62%
C. San Gabriel Valley 7.5% 17.64 17.81 67%
D. San Gabriel Mountains 13.4% 27.50 23.20 49%
E. Little Rock, Big Rock 4.5% 18.61 20.79 68%
F. Santa Monica Mountains 5.7% 19.96 22.28 64%
G. Santa Clara 18.9% 16.64 14.84 58%
H. Desert 28.0% 7.83 9.30 65%
County* 100.0% 15.65 15.62 59%
Los Angeles (Station No. 716) 15.51 15.57 55%
Cogswell Dam (Station No. 334-B) 32.88 34.09 65%