Precipitation Data

CNRFC Precipitation Summary - Google™ Maps Interface

A summary of nearly 2000 precipitation stations located throughout southern Oregon, California, and Nevada displayed on a Google™ Maps Interface. Data are available for the past 1, 2, 3, 6, 12, and 24 hours as well as 6 and 24 hour data ending at synoptic times (00, 06, 12, and 18 UTC). Data are updated every 10 minutes between 05 and 55 minutes past the top of the hour. Also, KML files are available for download and use in Google™ Earth.

    Precipitation Summary - Google™ Maps Interface

A regional summary of precipitation for the past 1, 2, 3, 6, 12, and 24 hours for California, Nevada, and portions of southern Oregon. Updates hourly at 18, 28, and 48 minutes after the hour. Alternate links are provided as a backup option.

    Precipitation Summary for the Past 1, 2, 3, 6, 12 & 24 Hours - [Alternate Link]

A summary of hourly precipitation for the past 6 hours for California, Nevada, and portions of southern Oregon. Gages are arrranged alphabetically by NWS Location Identifier. Updates hourly at 20, 30, and 50 minutes after the hour.

    Hourly Precipitation Summary for the Past 6 Hours

A summary of 6 hour and 24 hour precipitation ending at 4 AM PST updated 9:00 AM PST.
The precipitation data have been quality controlled. Missing data is estimated based on inverse-distance-squared weighting of nearby gage data to monthly PRISM climatological data.

    6/24-Hour Precipitation Summary - [Alternate Link]

A summary of precipitation since midnight, current seasonal totals (since July 1), and comparison to last year's seasonal totals. Precipitation totals are ending at 4 PM PST. This product is updated 6:00 PM PST.

    California Climate Station Precipitation Summary - [Alternate Link]

Observed 24-hour Basin Precipitation and next 24 Hour Basin QPF/Freezing Levels

    24-Hour Basin QPE/QPF/Freezing Level

Gridded Precipitation Maps

Small Scale Precipitation Gage Maps

Regional Large Scale Precipitation Gage Maps

California County Precipitation Maps

Since November 9, 2005, 24-hour precipitation gage maps for the entire CNRFC area, northern California, southern California, and Nevada are being archived and available for retrieval. An incomplete set of the gridded version for the entire CNRFC area is also available (back to 04/18/2003). The 24-hour period runs from 4am-4am during PST (5am-5am PDT). The file naming convention uses the ending date, so for example, today's date will provide precipitation data for the past 24 hours ending at 4am PST (5am PDT) this morning. Additionally since April 06, 2006, gage map subareas are being archived and available for retrieval.

Please Note: Precipitation gage maps are available daily after 4:30 am PST (5:30 am PDT). The CNRFC Grid map is available after 8:30 am PST (9:30 am PDT).

Please note that the maps display data from automated gages that have not been verified for accuracy.
Units of measurement are inches. M denotes missing data.

The National Weather Service generates a graphical representation of short-term observed and climatic trends of precipitation. This precipitation analylsis is available for the lower 48 United States (CONUS) and Puerto Rico.

NWS Precipitation Analysis

The following are data from NWS cooperative observers for the current water year and historically back to Water Year 2002. The water year starts on Oct 1 and ends on Sept 30. Precipitation data is provided for each month of the current water year, total precipitation for the water year, the percent of normal for the water year to date, and the percent of the entire water year received to date.

Current Water Year (2013) Monthly Observed Precipitation
Water Year 2012 Monthly Observed Precipitation
Water Year 2011 Monthly Observed Precipitation
Water Year 2010 Monthly Observed Precipitation
Water Year 2009 Monthly Observed Precipitation
Water Year 2008 Monthly Observed Precipitation
Water Year 2007 Monthly Observed Precipitation
Water Year 2006 Monthly Observed Precipitation
Water Year 2005 Monthly Observed Precipitation
Water Year 2004 Monthly Observed Precipitation
Water Year 2003 Monthly Observed Precipitation
Water Year 2002 Monthly Observed Precipitation

Northern Sierra 8-Station Precipitation Index - California Dept. of Water Resources
San Joaquin 5-Station Precipitation Index - California Dept. of Water Resources
ALERT Rainfall/Stream Level Data - Sacramento County Public Works
CoCoRaHS - Community Collaboraive Rain, Hail and Snow Network
California   |    Nevada   |    Oregon - CoCoRaHS State Data Maps
San Bernardino Co. ALERT Rainfall Data - San Bernardino Co. Flood Control District
Los Angeles County Precipitation - Los Angeles County Dept. of Public Works
Ventura County Precipitation - Ventura County Watershed Protection District
Santa Barbara County Precipitation - Santa Barbara County Dept. of Public Works
San Luis Obispo County Precipitation - San Luis Obispo County Dept. of Public Works
Precipitation/Snow Information - California Dept. of Water Resources
Precipitation Products - NESDIS/SSD - Satellite Analysis Branch
Srn CA Precipitation Maps and Tables (WFO Los Angeles/Oxnard)
Telemetry Data - U.S. Army Corps of Engineers - Los Angeles District
National Hourly/Daily Rain Data - NOAA Forecast Systems Laboratory