U.S. Drought Monitoring Tools

The U.S. Drought Monitor is an interagency drought monitoring tool that is issued weekly.

U.S. Drought Monitor Animation: 6-week or 12-week.

This page has been created to help in the preparation of the U.S. Drought Monitor. (The graphics linked to from this page are operational products produced by several different organizations and agencies. The quality control applied to these graphics varies from graphic to graphic and some of the graphics are experimental.) Some of the indicators that are examined to produce the U.S. Drought Monitor include the following:

Indicators Analyzed to Prepare the U.S. Drought Monitor Product

Source Daily/Weekly Maps
Streamflow thumbnail map
USGS
Daily Streamflow for Current Month
7-Day Average Streamflow
Daily Precipitaion thumbnail map
NWS RFC National Precipitation Verification Unit
6-hr and 24-hr Quantitative Precipitation Estimates - maps
NWSAHPS thumbnail map
\ NWS Advanced Hydrologic Prediction Services
NWS-AHPS National Precipitation Analysis
AWSPCP thumbnail map
National Weather Service
NWS Precipitation Analysis
Daily Weather thumbnail map
NWS NCEP Hydrometeorological Prediction Center
Daily Weather Maps (fronts, temperature, precipitation and 500-mb heights)
Topsoil thumbnail map
USDA (CPC)
USDA (NDMC)
USDA Topsoil - Very Short
NESDIS-VHI N. America thumbnail map
NESDIS - VHI Main
Satellite Vegetation Health Index
NESDIS - VHI N. America
NDMC-USGS thumbnail map
NDMC/USGS
Vegetation Drought Response Index
Fire danger thumbnail map
Forest Service
Fire Danger
Keetch-Byram Drought Index
Satellite Vegetation Greenness Index
NIFC thumbnail map
National Interagency Fire Center
NIFC Fire Incidents Map
PDSI thumbnail map
National Climatic Data Center
Weekly PDSI,CMI, Percent of Normal Precipitation and Temperature Departure from Normal
 USGS Water thumbnail map
USGS
USGS Water Monitor (Streamflow, Reservoirs, Groundwater, Snow)
PDSI thumbnail map
Climate Prediction Center
Experimental Objective Blends of Drought Indicators
Soil moisture thumbnail map
Climate Prediction Center
National
Soil Moisture Anomaly
Soil Moisture Percentiles

Evaporation Percentiles
Averaged Runoff Anomaly
Upper layer thumbnail map
Midwest Regional Climate Center
Midwest Climate Watch
WRCC SPEI thumbnail map
Western Regional Climate Center
WRCC Drought Monitoring
OK soil moisture thumbnail map
Oklahoma Mesonet
Oklahoma Mesonet Drought Monitoring
LDAS Drought thumbnail map
NASA
LDAS National Soil Moisture Percentiles (NASA)
LDAS National Soil Moisture Percentiles (EMC)
NLDAS National Runoff Percentiles (EMC)
NLDAS National Streamflow Percentiles (EMC)
Hydro UWA thumbnail map
University of Washington
Experimental Surface Water Monitor (soil moisture, SWE, total moisture storage, runoff)
Ensemble Forecast Analyses (soil moisture, SWE, runoff)
NWS-Leaky Bucket thumbnail map
Natonal Weather Service
NWS Leaky Bucket soil moisture, precipitation and temperature (historical)
NWS Leaky Bucket soil moisture, precipitation and temperature (current)
USDA-Pasture and Rangeland thumbnail map
USDA
USDA Pasture and Rangeland maps
USDA Crop Report thumbnail map
USDA
USDA Crop Reporting Statistics by State
HPRCC Weekly thumbnail map
High Plains Regional Climate Center
COOP station based maps of Temperature and Precipitation at several time frames, from weekly to multi-year
USGS Early Warning thumbnail map
USGS
Rain Days & Model Output
Avg Temp Anomaly thumbnail map
Climate Prediction Center
Average Temperature Anomaly
Accumulated Precipitation Anomaly
Rutgers snow thumbnail map
Rutgers Snow Lab
Northern Hemisphere Snow Cover Maps
Snowpack thumbnail map
USDA Natural Resources Conservation Service
Western U.S. Snowpack
(available January-May)
GLERL water level dashboard thumbnail map
NOAA GLERL
Great Lakes water levels
Data Download Portal (lake levels and ice)
Reservoir thumbnail map
USDA Natural Resources Conservation Service
Western U.S. Reservoir Storage
(available January-May)
* USDA NRCS current graphic *
(available year-round)
MT SWSI thumbnail map
NRCS
Surface Water Supply Index (SWSI)
USDA NRCS thumbnail map
USDA/NRCS
Western U.S. SNOTEL Snow Percentile Maps
(station plots)
USDA NRCS pcp thumbnail map
USDA/NRCS
Western U.S. SNOTEL Precipitation Percentile Maps
(station plots)
Snotel thumbnail map
Western Regional Climate Center
Western U.S. SNOTEL Precipitation Anomaly
(basin maps)
SWE Anomaly thumbnail map
Western Regional Climate Center
Western U.S. SNOTEL Snow Water Equivalent Anomaly
(basin maps)

Monthly Maps

Source Monthly Maps
Palmer thumbnail map
National Climatic Data Center
Monthly
Palmer Z Index
Palmer Drought Severity Index
Palmer Hydrological Drought Index
Standard thumbnail map
National Climatic Data Center
Monthly Standardized Precipitation Index, 1-24 Months