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Natural Resources Conservation Service
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National Water and Climate Center

  

Map Products

Precipitation

Note: "1st of Month" date summarizes the previous month.

SNOTEL
Precipitation
Month to Date
Water Year to Date
West-wide point maps  % of Normal
 % of Monthly Total Normal
 % of Normal
 % of Annual Total Normal
 Percentile
 Record
State point maps    % of Normal
   
 % of Normal
    
Basin-filled maps    % of Normal
    

% of Normal
    

 % of Normal
    

% of Normal
    

SNOTEL
Precipitation
1st of Month
 
West-wide point maps  % of Normal
    
 % of Monthly Total Normal
    
 
State point maps    % of Normal
    
 
Basin-filled maps    % of Normal
    
 
SNOTEL & ACIS
Precipitation
Month to Date
Water Year to Date
West-wide point maps  % of Normal  % of Normal
PRISM
Precipitation
Month to Date
 
U.S. maps Total Monthly
Monthly % of Average
 

Definitions:

Water Year: October 1 to September 30
Normal: The 1981-2010 average.
% of Normal: The current value as percent of the current date’s normal.
% of Normal to Date: In the case of precipitation, the current sub-seasonal total as % of the normal sub-seasonal total.
          Example: October 1-March 13 2005 / October 1 – March 13 Normal
          Example: March 1-March 13 2005 / March 1 – March 13 Normal
% of Monthly/Annual Total Normal: In the case of precipitation, the current sub-seasonal total as % of the normal seasonal total.
          Example: October 1-March 13 2005 / October 1 – September 30 Normal
          Example: March 1-March 13 2005 / March 1 – March 31 Normal
SNOTEL (SNOwpack TELemetry):  An automated near real-time data collection network that provides mid to high elevation hydroclimatic data from mountainous regions of the western United States.  A standard SNOTEL station provides snow water equivalent, snow depth, precipitation, and temperature data.  The SNOTEL network is maintained by the USDA Natural Resources Conservation Service Snow Survey and Water Supply Forecasting Program.
ACIS: Data served by the Regional Climate Centers and the NOAA National Climate Data Center’s “Applied Climate Information System”. This includes the Cooperative Observer Network, the Hourly Surface Airways Network and the Historical Climatology Network and other regional networks.
PRISM: The "Parameter-elevation Regressions on Independent Slopes Model" is a knowledge-based system that uses point measurements of precipitation, temperature, and other climate elements to produce continuous, digital coverages. These products were developed through a partnership between the NRCS National Water and Climate Center (NWCC) and the Spatial Climate Analysis Service (SCAS) at Oregon State University (OSU).

Disclaimer:

Data are provisional and subject to revision

Content Manager:
David Garen