U.S. Drought Monitor Inputs

If there are missing GIS data used in the USDM analysis, please send the needed information to DroughtMonitor@unl.edu to have them included here.

Air


AIRS

Last Updated: 7-16-2024

Data Source: NASA JPL

Data Status: Active

About the data:
AIRS vapor pressure deficit and standardized relative humidity products have the capacity to detect meteorological drought up to three months earlier than other drought indicators (Farahmand et al. 2015, Behrangi et al. 2016). These products along with AIRS surface air temperature are now part of the regular suite of indicators used in the generation of the USDM. As of AIRS processing version 7, AIRS Level 2 Vapor Pressure Deficit is a standard product in the AIRS product suite.

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Fire


AHPS Keetch-Byram Drought Index

Last Updated: 7-16-2024

Data Source: N.C. State

Data Status: Active

About the data:
The KBDI is an estimate of the soil moisture deficit, which is the amount of water necessary to bring the soil moisture to its full capacity. A high soil moisture deficit means there is little water available for evaporation or plant transpiration. This occurs in conditions of extended drought, and has significant effects on fire behaviour.

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Impacts


CoCoRaHS Imp

Last Updated: N/A

Data Source: CoCoRaHS

Data Status: Active

About the data:
N/A

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Precipitation


JAWF TUE 12Z

Last Updated: 7-16-2024

Data Source: CPC Joint Agricultural Weather Facility

Data Status: Active

About the data:
N/A

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AHPS Precipitation

Last Updated: 7-16-2024

Data Source: N/A

Data Status: Active

About the data:
N/A

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AHPS SPI

Last Updated: N/A

Data Source: NC State/Texas A&M

Data Status: Inactive

About the data:
N/A

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AHPS SPEI

Last Updated: N/A

Data Source: NC State/Texas A&M

Data Status: Inactive

About the data:
N/A

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HPRCC SPI MON

Last Updated: 7-15-2024

Data Source: HPRCC

Data Status: Active

About the data:
N/A

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HPRCC SPI TUE

Last Updated: 7-16-2024

Data Source: HPRCC

Data Status: Active

About the data:
N/A

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CPC Precipitation

Last Updated: 7-15-2024

Data Source: CPC

Data Status: Active

About the data:
N/A

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CPC SPI

Last Updated: 7-15-2024

Data Source: CPC

Data Status: Active

About the data:
N/A

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WWDT SPI

Last Updated: 7-8-2024

Data Source: N/A

Data Status: Active

About the data:
N/A

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WWDT SPEI

Last Updated: 7-8-2024

Data Source: N/A

Data Status: Active

About the data:
N/A

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WWDT PDSI

Last Updated: N/A

Data Source: N/A

Data Status: Active

About the data:
N/A

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WWDT Precipitation

Last Updated: N/A

Data Source: N/A

Data Status: Active

About the data:
N/A

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Soil Moisture


NLDAS2

Last Updated: 7-15-2024

Data Source: N/A

Data Status: Active

About the data:
Soil moisture rasters for current, 7 days nd 30 days for 5 different models: Ensemble, NOAH, VIC, SAC and Mosaic.

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NASA GRACE Soil Moisture

Last Updated: 7-16-2024

Data Source: NASA

Data Status: Active

About the data:
The maps are based on data from NASA's Gravity Recovery and Climate Experiment (GRACE; 2002-2017) and GRACE Follow On (GRACE-FO; 2018-present) satellites, which detect small changes in the Earth's gravity field caused by the redistribution of water on and beneath the land surface. The paired satellites travel about 137 miles (220 km) apart at an altitude of 300 miles (485 km) and record small changes in the distance separating them as they encounter variations in the Earth's gravitational field. To make the maps, scientists use a sophisticated computer model that combines measurements of water storage anomalies from GRACE and GRACE-FO with a long-term meteorological dataset to generate a continuous record of soil moisture and groundwater that stretches back to 1948. The meteorological data include precipitation, temperature, solar radiation and other ground- and space-based measurements.

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CPC Soil Moisture

Last Updated: 7-16-2024

Data Source: CPC

Data Status: Active

About the data:
N/A

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Streamflows


USGS Streamflow

Last Updated: 7-16-2024

Data Source: USGS

Data Status: Active

About the data:
N/A

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Temperature


WWDT Temperature

Last Updated: N/A

Data Source: N/A

Data Status: Active

About the data:
N/A

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Vegetation


NOAA Evaporative Demand Drought Index

Last Updated: 7-15-2024

Data Source: NOAA

Data Status: Active

About the data:
The Evaporative Demand Drought Index (EDDI) is an experimental drought monitoring and early warning guidance tool. It examines how anomalous the atmospheric evaporative demand (E0; also known as "the thirst of the atmosphere") is for a given location and across a time period of interest. EDDI is multi-scalar, meaning that this period—or "timescale"—can vary to capture drying dynamics that themselves operate at different timescales; we generate EDDI at 1-week through 12-month timescales.

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NASA Evaporative Stress Index

Last Updated: N/A

Data Source: NASA

Data Status: Active

About the data:
N/A

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CPC Vegitative Health Index

Last Updated: 7-15-2024

Data Source: CPC

Data Status: Active

About the data:
N/A

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NDMC Vegetation Drought Response Index

Last Updated: 7-15-2024

Data Source: NDMC/USGS

Data Status: Active

About the data:
The VegDRI calculations integrate satellite-based observations of vegetation conditions, climate data, and other biophysical information such as land cover/land use type, soil characteristics, and ecological setting. The VegDRI maps that are produced deliver continuous geographic coverage over large areas, and have inherently finer spatial detail (1-km2 resolution) than other commonly available drought indicators such as the U.S. Drought Monitor.

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NDMC Quick Drought Response Index

Last Updated: 7-15-2024

Data Source: NDMC/USGS

Data Status: Active

About the data:
QuickDRI is a geospatial tool that characterizes the intensification of short-term drought condition patterns on a weekly basis across the continental United States (CONUS) at a 1-km gridded spatial resolution. The primary goal of QuickDRI is to serve as an "alarm" indicator of rapidly emerging events such as "flash drought" that manifest rapidly on the order of a few days to weeks, are often difficult to detect using traditional drought indicators, and can having devastating negative impacts on agriculture and natural resources.

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Wells


USGS Well

Last Updated: N/A

Data Source: USGS

Data Status: Inactive

About the data:
N/A

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