U.S. Drought Monitor
Map released: Thurs. October 21, 2021
Data valid: October 19, 2021 at 8 a.m. EDT

Intensity

  • None
  • D0 (Abnormally Dry)
  • D1 (Moderate Drought)
  • D2 (Severe Drought)
  • D3 (Extreme Drought)
  • D4 (Exceptional Drought)
  • No Data

Authors

United States and Puerto Rico Author(s):

Pacific Islands and Virgin Islands Author(s):

The Drought Monitor focuses on broad-scale conditions. Local conditions may vary. See accompanying text summary for forecast statements.

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Statistics

Estimated Population in Drought Areas:

West Drought Summary

Severe (D2) to exceptional (D4) drought continues throughout much of the Pacific Northwest, California, and the Great Basin. Nearly all of this region remained status-quo in terms of drought changes as the Monsoon season ended and the wet season just began. A robust Monsoon brought an end to short-term drought impacts across Arizona and southern Utah, but long-term drought impacts persist. Along and west of the Cascades, above normal precipitation was observed across western Oregon and Washington since mid-September. This favorable start to the wet season along with improving streamflows and SPI values support the removal of small D4 in Douglas and Linn counties of Oregon. Periods of beneficial precipitation and cooler temperatures led to an improvement from D4 to D3 along the mountain range front in Utah. However, D4 persists across the Sevier River Basin of southern Utah. The increase in precipitation, related to the onset of the wet season, along with much cooler temperatures resulted in a large decrease in the number of large wildfires throughout the West during mid-October. Extreme drought (D3) was expanded across northwest Montana based on 28-day streamflows near the 5th percentile along with 30 to 60-day SPIs. Conversely, last week’s major storm prompted slight reduction in drought intensity across parts of eastern Montana.

Full Summary

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