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Colorado Precipitation Monitoring The maps below are created monthly in order to track Water Year (October 1 - September 30) precipitation in Colorado to aid in drought monitoring, runoff forecasting, agricultural planning and emergency management. For past water year maps click here
Disclaimer: These maps are based on preliminary data which is subject to change. Please use these products with appropriate caution.
These maps utilize total monthly precipitation from the following sources: National Weather Service Cooperative (COOP) network Natural Resources Conservation Service (NRCS) Snow Telemetry (Snotel) stations National Climatic Data Center (NCDC) Climate Reference Network (CRN) stations Community Collaborative Rain, Hail and Snow Network (CoCoRaHS)
The Monthly Precipitation maps are a spatially distributed representation of point data across the state. The units are in inches of precipitation. The Monthly Percent of Normal maps divide the monthly precipitation by the distributed normal precipitation (from COOP and Snotel only) for the month. It is represented as a percentage of normal. Water Year (Oct-Sept) Percent of Normal maps track Colorado's precipitation status through the water year by comparing the most current conditions to what is climatically expected starting with the snow accumulation period and extending through spring melt-out into the drier summer months.
For past water year maps click here
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