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Intermountain West Drought Early Warning System

While all five states in the Intermountain West depend on the over-allocated Colorado River, climatic, geographic, economic, and social conditions vary significantly across the region, which ranges from deserts and riparian woodlands to high valleys and alpine systems. The Southwestern Monsoon is a dominant driver of weather in the southern states, while continental weather systems have a greater impact on the northern states. Droughts may onset quickly as a flash drought in portions of Colorado and Wyoming, and may last decades, as with current conditions in parts of Arizona. The Intermountain West DEWS helps foster interstate coordination to cope with current and future droughts and growing water demands and supports increased communication and collaboration between scientific, water, and land management communities.

Read more about the Intermountain West DEWS

U.S. Drought Monitor - Intermountain West DEWS

Drought Conditions (Percent Area)
WeekNoneD0-D4D1-D4D2-D4D3-D4D4
Current
3/31/2020
57.03%42.97%29.24%5.92%0.00%0.00%
Last Week
3/24/2020
55.29%44.71%29.12%6.15%0.00%0.00%
Three Months Ago
12/31/2019
47.26%52.74%33.81%17.70%0.00%0.00%
Start of Calendar Year
12/31/2019
47.26%52.74%33.81%17.70%0.00%0.00%
One Year Ago
4/02/2019
67.64%32.36%11.34%3.69%0.00%0.00%

Drought Intensities

  •       None: No Drought
  •       D0: Abnormally Dry
  •       D1: Moderate Drought
  •       D2: Severe Drought
  •       D3: Extreme Drought
  •       D4: Exceptional Drought
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Pie chart describing current drought for this location.