Links to background information, current conditions and precipitation required to end or ameliorate drought across the U.S.
To view maps of precipitation required to end or ameliorate drought across the U.S., please select from the options below and then click "Submit".
The end of a drought is defined by a PHDI value of -0.5.
Drought amelioration is achieved when a PHDI value of -2.0 is reached.
http://www.ncdc.noaa.gov/oa/climate/research/drought/drought.html