North American Drought Monitor

North American Drought Monitor
Name	North American Drought Monitor
Formation	2002
Jurisdiction	North America
Headquarters	Washington, D.C.

North American Drought Monitor The North American Drought Monitor is a collaborative, interagency program that produces weekly maps and narrative assessments of drought conditions across the United States, Canada, and Mexico. It supports decision-making for water managers, agricultural stakeholders, public health officials, and emergency planners by integrating observations from federal agencies, academic institutions, and regional partners. The product synthesizes inputs from multiple monitoring systems and translates complex hydrometeorological data into an accessible graphical format for policymakers and the public.

Overview

The initiative began as a trilateral effort among agencies including the U.S. Department of Agriculture, the National Oceanic and Atmospheric Administration, and the Canadian Drought Monitor collaborators, with contributions from the Mexican National Water Commission and research centers such as the University Corporation for Atmospheric Research and the National Center for Atmospheric Research. Operational partners include the U.S. Geological Survey, the U.S. Army Corps of Engineers, the Environment and Climate Change Canada scientific divisions, and the Servicio Meteorológico Nacional (Mexico). The program aligns with international frameworks like the North American Free Trade Agreement era cooperative initiatives and climate monitoring partnerships involving the Intergovernmental Panel on Climate Change assessment teams and regional climate centers such as the Climate Prediction Center.

Methodology and Data Sources

Analysts produce the map by synthesizing observational networks and model outputs from providers such as the Global Historical Climatology Network, the National Environmental Satellite, Data, and Information Service, and the European Centre for Medium-Range Weather Forecasts. Hydrologic inputs draw on streamflow gauges operated by the U.S. Geological Survey and reservoir datasets maintained by the Bureau of Reclamation and the National Water Center. Soil moisture and evapotranspiration estimates come from remote sensing platforms like MODIS, processing centers at the Jet Propulsion Laboratory, and land-surface models run by research groups at the Scripps Institution of Oceanography and Princeton University. Agricultural impact reports are integrated from programs such as the United States Department of Agriculture National Agricultural Statistics Service and provincial counterparts like Agriculture and Agri-Food Canada. Meteorological forcings utilize data from the National Weather Service, the Servicio Meteorológico Nacional (Mexico), and reanalysis products produced by the European Centre for Medium-Range Weather Forecasts and the National Centers for Environmental Prediction.

Drought Classification and Indicators

The mapping convention adopts categorical classes that relate to indicators used by agencies including the U.S. Department of Agriculture and the Food and Agriculture Organization guidance for drought early warning. Categories reflect severity levels analogous to frameworks in reports by the Intergovernmental Panel on Climate Change and are informed by metrics such as the Standardized Precipitation Index outputs from university research groups at Penn State University and Cornell University, the Palmer Drought Severity Index heritage analyses from the National Oceanic and Atmospheric Administration, and soil moisture percentiles derived by the National Center for Atmospheric Research. Hydrological drought signals incorporate streamflow percentiles curated by the U.S. Geological Survey and groundwater assessments coordinated with state and provincial agencies including the Texas Water Development Board and the Ontario Ministry of Natural Resources and Forestry.

Coverage and Maps

Weekly maps cover continental extents assembled at mapping centers comparable to those used by the European Drought Observatory and the Australian Bureau of Meteorology, tailored to North American administrative boundaries such as states, provinces, and federal entities like the District of Columbia. Cartographic production leverages geographic information systems developed at institutions including Esri and academic labs at the University of California, Berkeley and McGill University. Historical archive products connect to long-term datasets maintained by the National Climatic Data Center legacy holdings and research archives at the World Meteorological Organization Regional Association IV. Visual products are disseminated through portals managed by the National Integrated Drought Information System and partner platforms at the Environment and Climate Change Canada data hubs.

Applications and Uses

Stakeholders use the monitor for water allocations overseen by entities such as the Bureau of Reclamation in western basins and provincial water authorities like the Alberta Environment and Parks. Agricultural planners reference the map alongside crop insurance programs administered by the Risk Management Agency and market analysts at institutions including the Chicago Mercantile Exchange and the International Monetary Fund when assessing food security risks. Public health agencies, including the Centers for Disease Control and Prevention and provincial health ministries, consult drought assessments to anticipate vector-borne disease and wildfire smoke impacts coordinated with firefighting agencies such as the U.S. Forest Service and Canadian Interagency Forest Fire Centre. Energy sector planners at utilities and grid operators like the California Independent System Operator and the North American Electric Reliability Corporation use drought information for hydroelectric generation forecasting and fuel supply planning.

Limitations and Criticisms

Critiques of the product mirror concerns raised in peer-reviewed studies from institutions like Stanford University and Columbia University about spatial resolution, indicator selection, and the representativeness of station networks such as the Global Historical Climatology Network. Observational gaps in remote regions and cross-border consistency issues have been noted by agencies including the International Joint Commission and researchers affiliated with the University of Arizona. Methodological debates involve trade-offs highlighted by analysts at the National Academy of Sciences between probabilistic drought forecasting from centers like the Climate Prediction Center and deterministic categorizations used in routine map updates. Stakeholders have recommended enhanced integration with climate projections from the Coupled Model Intercomparison Project ensemble runs and expanded engagement with indigenous water authorities and basin organizations such as the Columbia Basin Trust to improve contextual relevance and equity in impacts reporting.

Category:Hydrology Category:Climate monitoring