Tools Monitor soil, crops, weather and other conditions.

map of US shows regions where different crops are raised and where they are in drought
The USDA produces monthly maps and charts showing locations and percentages of drought-affected areas which produce corn, soybeans, hay, cattle, and winter wheat.
Sample of Crop Moisture Index
Weekly maps shows short term need vs. available water in shallow soils.
map of US shows soil moisture levels in a model
Modeled soil moisture from the NOAA Climate Prediction Center.