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This Week's Drought Summary…
The recent pattern of numerous changes in the USDM continued with this week’s map release. Continued dry weather in the Northeast led to widespread worsening of drought and abnormal dryness there. From Missouri northward to the Great Lakes states, many locations saw drought or abnormal dryness worsen. In particular, intense short-term drought continued to worsen in parts of Missouri, Illinois, Indiana and Ohio. However, in southeast Missouri and in the Ohio River Valley and some parts of the Mississippi River Valley, welcome rains fell, locally over 3 inches, leading to widespread improvements in ongoing drought and abnormal dryness in these areas.
Much of Alabama, the Carolinas and Georgia saw drier weather, with local exceptions. As such, drought and abnormal dryness also expanded across portions of these states and a few spots in nearby Florida. Very heavy rain fell in southeast Louisiana; one area received over 5 inches of rain, leading to a 2-category improvement in the USDM, surrounded by nearby 1-category improvements after the heavy rain. In west Louisiana, Oklahoma and Texas, dry weather this week led to many degradations as primarily short-term dryness intensified. A few areas of central and southwest Texas are also seeing long-term dryness and drought and saw some intensification this week.
Drier weather this week in northeast Montana led to the development of moderate drought there. Recent heavy precipitation and reassessment of recent conditions led to widespread improvements in parts of the western United States, especially the Las Vegas area, northern areas of Nevada and Utah, Oregon and southwest Idaho, southeast Wyoming and a few spots in the Colorado Rocky Mountains. A wetter month of September also led to localized improvement away from abnormal dryness on the northeast coast of Kauai, though ongoing drought conditions remained unchanged elsewhere in Hawaii after a mainly drier week.