NWS Hydrologic Information Center
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Palmer Drought Severity Index

 Developed to measure long-term (months) soil moisture variations

Crop Moisture Index

 Monitors shorter-term (days) soil moisture variations (top 5 feet)
Image of Soil Moisture and Prediction

Soil Moisture Monitoring and Prediction

 Experimental project conducted by the NWS National Centers for Environmental Prediction (NCEP) Climate Prediction Center
Image of Soil Moisture and Outlook for U.S.

Soil Moisture and Outlook for U.S.

 Center for Ocean-Land-Atmosphere Studies initial mModel  conditions and predicted 14-day change in soil moisture

Image of Keetch-Byram Drought Map product

Keetch-Byram Drought Index

 Used by the U.S. Dept. of Agriculture to monitor wildfire conditions.

Please note: Soil moisture indices may be misleading in winter because they may not adequately
account for frozen precipitation, snow on the ground or frozen ground.

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Last Updated: March 19, 2009 		Disclaimer
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