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Short Range Public Discussion
 
(Caution: Version displayed is not the latest version. - Issued 2010Z Jul 26, 2021)
 
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Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 410 PM EDT Mon Jul 26 2021 Valid 00Z Tue Jul 27 2021 - 00Z Thu Jul 29 2021 ...Monsoon moisture continues to fuel showers and thunderstorms and a flash flooding threat for parts of the western U.S.... ...Above normal temperatures continue to impact a large portion of the U.S.... ...Severe weather likely for portions of the northern Great Plains and Upper Midwest Monday evening... Monsoon moisture continues to fuel showers and thunderstorms across portions of the southwestern U.S. These storms will have the potential to produce locally heavy rainfall amounts, resulting in flash flooding. Flash flood watches remain in effect across portions of California, Nevada, southern Utah, and southwestern Colorado. As this moisture streams north, shower and thunderstorm coverage is expected to increase across the Great Basin and portions of the Northwest on Tuesday. While widespread heavy rainfall amounts are not expected, locally heavy accumulations resulting in flash flooding will remain a concern over the next couple of days. From the southwestern U.S. to southern Oregon, these storms will help to keep temperatures at or below their seasonal averages through Tuesday. However, temperatures for much of the remainder of the contiguous states will remain above normal into the middle part of the week. Heat Advisories and Excessive Heat Warnings currently cover a significant portion of the central U.S. -- from the central Gulf Coast to central Montana. Heat Advisories or Excessive Heat Warnings are also in effect for portions of southern Idaho, northern Nevada, eastern Oregon, and Florida. It expected to become a stormy afternoon and evening across portions of the northern Great Plains and Upper Midwest. Storms that develop later today will have significant potential to become severe, with damaging winds and large hail expected from portions of the eastern Dakotas to northern Minnesota, northern Wisconsin, and Upper Michigan. There is also the threat for severe storms to develop producing damaging winds across parts of southern Virginia and North Carolina. Storms developing across these areas will also have to the potential to produce locally heavy rainfall amounts resulting in flash flooding. Showers and thunderstorms are forecast to develop once again across portions of the Upper Midwest on Tuesday. However, the greater threat for severe weather is expected to shift farther south into southern Minnesota and Wisconsin, where storms producing damaging winds and hail may become a concern. Meanwhile, locally severe storms may also develop along a cold front dropping into the Northeast on Tuesday. In addition to those storms, this front is expected to deliver much cooler temperatures to the region that will continue through midweek. Pereira Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php