A wintry mix will continue in interior New England through tonight as a coastal storm quickly passes to the east. Heavy snow is expected in northern Maine, with a coating of ice expected for much of interior New England. Behind this storm system, lake effect snow and snow squalls will develop from the Ohio Valley to interior New England through Monday. Read More >
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Overview During the late afternoon of August 19th, a supercell developed across northeast Wyoming and tracked directly over Devils Tower, where it caused extensive damage to trees, buildings, campers, and vehicles. The National Park Service closed Devils Tower due to the severe storm damage. The supercell then tracked eastward through the Northern Black Hills and onto the plains of western South Dakota, and continued to produce large hail, strong winds, and heavy rain, before dissipating later in the evening. |
 Devils Tower Courtesy of Thomas Winesett |
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| Devils Tower Courtesy of Jodi Havener |
Devils Tower Courtesy of Jodi Havener |
Devils Tower Courtesy of Jodi Havener |
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| Devils Tower Courtesy of NPS |
Devils Tower Courtesy of State of Wyoming |
Devils Tower Courtesy of Ken Nutter |
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| Devils Tower Courtesy of Ken Nutter |
Devils Tower Courtesy of Ken Nutter |
Spearfish, SD Courtesy of Janice Wolfe |
Radar
Storm Reports
...PRELIMINARY RAINFALL TOTALS SORTED BY MAGNITUDE... LOCATION TOTAL RAIN COMMENTS Deadwood SD 3.50 200 PM 8/20/2024 Lead SD 2.85 900 AM 8/20/2024 12 WSW Hereford SD 2.50 1130 PM 8/19/2024 1 E Lead SD 2.46 800 AM 8/20/2024 4 SSW Saint Onge SD 2.05 600 AM 8/20/2024 3 SE Spearfish SD 2.03 800 AM 8/20/2024 Sundance WY 1.90 805 AM 8/20/2024 2 NW Central City SD 1.84 826 AM 8/20/2024 1 NNW Dwtn Spearfish SD 1.68 1000 AM 8/20/2024 1 SSE Dwtn Spearfish SD 1.67 800 AM 8/20/2024 1 SSW Sturgis SD 1.53 700 AM 8/20/2024 Dwtn Spearfish SD 1.52 1053 PM 8/19/2024 2 WNW Dwtn Spearfish SD 1.52 818 AM 8/20/2024 4 NNW Tilford SD 1.46 800 AM 8/20/2024 1 NNW Nisland SD 1.41 800 AM 8/20/2024 7 NNE Ellsworth AFB SD 1.41 700 AM 8/20/2024 2 E Sturgis SD 1.37 1120 PM 8/19/2024 Tilford SD 1.20 700 AM 8/20/2024 4 NNW Elm Springs SD 1.19 600 AM 8/20/2024 Devils Tower WY 1.05 1041 PM 8/19/2024 1 S Devils Tower WY 1.05 800 AM 8/20/2024 3 SE Nisland SD 1.02 800 AM 8/20/2024 6 NNW Dwtn Spearfish SD 1.00 700 AM 8/20/2024 3 SE Saint Onge SD 0.99 600 AM 8/20/2024 7 E Sturgis SD 0.97 800 AM 8/20/2024 12 WNW Philip SD 0.94 800 AM 8/20/2024 7 N Kirley SD 0.93 700 AM 8/20/2024 9 NNE Sturgis SD 0.91 629 AM 8/20/2024 2 NW Sundance WY 0.91 645 AM 8/20/2024 4 NNW Sturgis SD 0.86 700 AM 8/20/2024 9 SE Kirley SD 0.82 800 AM 8/20/2024 Union Center SD 0.82 800 AM 8/20/2024 1 WSW South Eagle Butte SD 0.77 800 AM 8/20/2024 2 E Vale SD 0.72 630 AM 8/20/2024 1 S Belle Fourche SD 0.72 700 AM 8/20/2024 9 N Kirley SD 0.66 800 AM 8/20/2024 3 E Philip SD 0.66 800 AM 8/20/2024 6 WNW Union Center SD 0.65 700 AM 8/20/2024 6 NE Summerset SD 0.62 800 AM 8/20/2024 Wasta SD 0.58 800 AM 8/20/2024 6 SW Beulah WY 0.55 800 AM 8/20/2024 9 WSW Red Elm SD 0.50 700 AM 8/20/2024 2 E Cottonwood SD 0.47 200 PM 8/20/2024 2 E Cottonwood SD 0.41 800 AM 8/20/2024 3 SE Philip SD 0.38 639 AM 8/20/2024 6 SSW Fairpoint SD 0.36 609 AM 8/20/2024 Wall SD 0.35 800 AM 8/20/2024 4 NNE Summerset SD 0.32 600 AM 8/20/2024 4 WNW Cedar Butte SD 0.28 800 AM 8/20/2024 2 N Summerset SD 0.28 800 AM 8/20/2024 19 NNE Creighton SD 0.27 700 AM 8/20/2024 1 N Red Owl SD 0.25 700 AM 8/20/2024 3 WNW Milesville SD 0.23 700 AM 8/20/2024 8 ENE Alva WY 0.22 700 AM 8/20/2024 3 ESE Cheyenne Crossing SD 0.21 700 AM 8/20/2024 6 WSW Opal SD 0.19 700 AM 8/20/2024 3 WNW Kadoka SD 0.17 500 AM 8/20/2024 3 E Midland SD 0.16 700 AM 8/20/2024 12 NNW White River SD 0.15 700 AM 8/20/2024 11 W Milesville SD 0.13 800 AM 8/20/2024 8 S Wall SD 0.13 800 AM 8/20/2024 17 SW Milesville SD 0.13 800 AM 8/20/2024 9 N Cedar Butte SD 0.13 600 AM 8/20/2024 2 W Hamill SD 0.13 800 AM 8/20/2024 3 ENE Kyle SD 0.08 700 AM 8/20/2024 Wright WY 0.08 700 AM 8/20/2024 1 NNE Faith SD 0.08 800 AM 8/20/2024 12 SSE Milesville SD 0.08 700 AM 8/20/2024 5 W Ellsworth AFB SD 0.07 700 AM 8/20/2024 1 NNW Piedmont SD 0.07 800 AM 8/20/2024 2 SSE Ideal SD 0.07 600 AM 8/20/2024 1 S White River SD 0.07 800 AM 8/20/2024 1 ESE Pactola Resv SD 0.06 900 AM 8/20/2024 6 N Hamill SD 0.06 600 AM 8/20/2024 10 W Reva SD 0.05 800 AM 8/20/2024 3 W Scenic SD 0.05 700 AM 8/20/2024 12 S Quinn SD 0.05 800 AM 8/20/2024 Nemo SD 0.05 800 AM 8/20/2024 Piedmont SD 0.05 700 AM 8/20/2024 1 NE Winner SD 0.04 800 AM 8/20/2024 3 NE Hisega SD 0.04 700 AM 8/20/2024 11 NNE Weston WY 0.04 700 AM 8/20/2024 4 NW Dwtn Rapid City SD 0.04 700 AM 8/20/2024 5 NE Porcupine SD 0.04 800 AM 8/20/2024 7 N Wood SD 0.03 600 AM 8/20/2024 3 NNE Johnson Siding SD 0.03 700 AM 8/20/2024 1 N Buffalo SD 0.03 800 AM 8/20/2024 4 NW Parmelee SD 0.03 700 AM 8/20/2024 1 N Hisega SD 0.02 700 AM 8/20/2024 8 SE Mud Butte SD 0.02 800 AM 8/20/2024 4 NNE Johnson Siding SD 0.02 800 AM 8/20/2024 2 SSW Custer SD 0.01 800 AM 8/20/2024 6 W Rochford SD 0.01 800 AM 8/20/2024 1 NE Dwtn Rapid City SD 0.01 600 AM 8/20/2024 ...MAXIMUM OBSERVED WINDS SORTED BY MAGNITUDE... LOCATION MAX WIND COMMENTS 9 NE Tilford SD 80 1000 PM 8/19/2024 12 WSW Hereford SD 60 935 PM 8/19/2024 14 SSE Hereford SD 60 1025 PM 8/19/2024 3 NW Wasta SD 60 1106 PM 8/19/2024 1 S Devils Tower WY 54 545 PM 8/19/2024 5 SW Aladdin WY 51 640 PM 8/19/2024 ...MAXIMUM HAIL SIZE SORTED BY MAGNITUDE... LOCATION MAX SIZE COMMENTS Devils Tower WY 2.75 550 PM 8/19/2024 Brownsville SD 2.00 801 PM 8/19/2024 3 ESE Cheyenne Crossing SD 2.00 745 PM 8/19/2024 2 SW Galena SD 1.75 800 PM 8/19/2024 9 NE Tilford SD 1.75 1000 PM 8/19/2024 Deadwood SD 1.75 745 PM 8/19/2024 8 NNE Sundance WY 1.50 630 PM 8/19/2024 Tilford SD 1.25 838 PM 8/19/2024 Box Elder SD 1.00 1050 PM 8/19/2024 3 W Galena SD 1.00 915 PM 8/19/2024 Dwtn Spearfish SD 1.00 732 PM 8/19/2024
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