Statistics presented with the weekly map show what portion of various geographic areas are in each category of dryness or drought, and how many people are affected. Once they gather and consider this input, they publish the weekly drought map. The final step is to check their assessments with local experts who can check actual conditions. Based on dozens of indicators and using a 'convergence of evidence' approach, experts make their best judgments of regional-scale drought conditions. Experts also check whether areas are showing drought impacts such as water shortages or business interruptions. They evaluate how recent precipitation amounts across the country compare to their long-term averages, and monitor variables such as temperature, soil moisture, snow cover, and meltwater runoff. Major crop/pastures losses widespread water shortages or restrictions.Įxceptional and widespread crop/pasture losses shortages of water in reservoirs, streams, and wells creating water emergencies.Įach week, drought experts consider how much water is available in streams, lakes, and soils compared to usual for the the current time of the year. Some damage to crops/pastures streams, reservoirs, or wells are low with some water shortages developing or imminent voluntary water-use restrictions requested.Ĭrops/pasture losses are likely water shortages are common and water restrictions are imposed. Going into drought: short-term dryness slows growth of crops/pastures.Ĭoming out of drought: some lingering water deficits crops/pastures not fully recovered. The maps use bright colors to highlight experts' current assessments of conditions related to dryness and drought. Drought Monitor (USDM) is a weekly map-updated each Thursday-that shows the location and intensity of areas currently experiencing abnormal dryness or drought across the United States.

Spy fox in dry cereal sea map