Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >
Overview
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A significant October storm system brought soaking rains to southern and western portions of South Dakota, and parts of northeastern Wyoming. Light accumulations of snow were observed across the higher elevations of the Black Hills. Some minor flooding of the White River occurred across Jackson County near and downstream from Interior. |
 Estimated precipitation amounts from Thursday morning through Friday noon. |
Minor Flooding
Rainfall amounts of 3 to 4 inches along a good portion of the White River produced some minor flooding in and below the Interior area.
Hydrographs
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| Minor flooding along the White River near Interior Friday afternoon. | Minor flooding expected along the White River near Kadoka through Friday night. |
Photos
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| White River near Interior | White River near Interior | White River near Interior | White River near Interior |
Rain Reports (Thursday morning through Friday noon)
*********STORM TOTAL RAINFALL (AT LEAST 1.00 INCH)********** LOCATION TOTAL TIME/DATE COMMENTS RAINFALL MEASURED (inches) SOUTH DAKOTA ...Bennett County... 8 E Martin 2.75 700 AM 10/13 Co-Op Observer Martin 1.68 345 PM 10/12 Public ...Custer County... 1 SW Hermosa 4.28 754 AM 10/13 Trained Spotter Hermosa 4.14 600 AM 10/13 CoCoRaHS 7 WSW Fairburn 3.67 700 AM 10/13 CoCoRaHS 1 NW Hermosa 3.60 700 AM 10/13 CoCoRaHS 6 W Hermosa 3.48 700 AM 10/13 CoCoRaHS 7 WSW Folsom 3.33 500 AM 10/13 CoCoRaHS 12 ENE Buffalo Gap 3.20 835 AM 10/13 Trained Spotter 5 ENE Custer 3.11 700 AM 10/13 CoCoRaHS 5 WNW Hermosa 3.08 917 PM 10/12 Trained Spotter 1 ENE Custer 2.44 700 AM 10/13 CoCoRaHS ...Fall River County... Oral 3.29 700 AM 10/13 Co-Op Observer 2 SSW Ardmore 3.15 700 AM 10/13 CoCoRaHS Hot Springs 3.04 700 AM 10/13 CoCoRaHS 1 S Hot Springs 2.26 800 AM 10/13 CoCoRaHS 2 ENE Edgemont 2.00 700 AM 10/13 CoCoRaHS Angostura Res 1.32 700 AM 10/12 Trained Spotter 14 NW Edgemont 1.23 800 AM 10/13 CoCoRaHS 1 NNE Edgemont 1.20 700 AM 10/13 Co-Op Observer ...Haakon County... 3 E Midland 2.68 700 AM 10/13 CoCoRaHS 3 SE Philip 2.67 644 AM 10/13 CoCoRaHS 9 SE Kirley 1.25 800 AM 10/13 CoCoRaHS ...Jackson County... 3 WNW Kadoka 2.53 500 AM 10/13 CoCoRaHS 3 WSW Wanblee 1.34 700 AM 10/12 CoCoRaHS ...Lawrence County... 3 ESE Cheyenne Cross 1.67 700 AM 10/13 CoCoRaHS Lead 1.40 900 AM 10/13 Co-Op Observer 2 NW Central City 1.08 729 AM 10/13 CoCoRaHS ...Meade County... 1 NNW Piedmont 2.96 728 PM 10/12 NWS Employee 5 W Ellsworth AFB 1.99 700 AM 10/13 CoCoRaHS 4 NNE Summerset 1.86 550 AM 10/13 CoCoRaHS Piedmont 1.86 700 AM 10/13 CoCoRaHS Tilford 1.76 700 AM 10/13 CoCoRaHS 6 NE Summerset 1.56 700 AM 10/13 CoCoRaHS 7 NNE Ellsworth AFB 1.24 700 AM 10/13 NWS Employee 2 E Sturgis 1.19 700 PM 10/12 Co-Op Observer ...Mellette County... 5 ESE Norris 5.10 1021 AM 10/13 Trained Spotter 9 N Cedar Butte 4.78 600 AM 10/13 CoCoRaHS 4 NE Wood 4.37 700 AM 10/13 CoCoRaHS 3 NE Norris 3.95 500 AM 10/13 CoCoRaHS 7 N Wood 3.83 600 AM 10/13 CoCoRaHS 2 SSW Norris 3.06 700 AM 10/13 CoCoRaHS 12 NNW White River 2.82 700 AM 10/13 CoCoRaHS ...Oglala Lakota County... 3 ENE Kyle 3.06 700 AM 10/13 Co-Op Observer ...Pennington County... 9 ENE Hayward 3.32 800 AM 10/13 CoCoRaHS 3 NE Hisega 3.06 700 AM 10/13 CoCoRaHS 4 W Dwtn Rapid City 2.99 700 AM 10/13 CoCoRaHS 1 N Hisega 2.99 700 AM 10/13 NWS Employee 4 NNE Johnson Siding 2.96 800 AM 10/13 CoCoRaHS 12 S Quinn 2.94 800 AM 10/13 CoCoRaHS 2 WNW Dwtn Rapid Cit 2.90 700 AM 10/13 CoCoRaHS 3 NNE Johnson Siding 2.85 700 AM 10/13 CoCoRaHS 2 SW Dwtn Rapid City 2.78 626 PM 10/12 NWS Employee 4 NW Dwtn Rapid City 2.75 700 AM 10/13 Co-Op Observer 1 ESE Pactola Resv 2.75 900 AM 10/13 Co-Op Observer 1 N Johnson Siding 2.73 800 AM 10/13 CoCoRaHS 2 SSE Dwtn Rapid Cit 2.72 700 AM 10/13 CoCoRaHS Hill City 2.70 928 AM 10/13 NWS Employee Mount Rushmore 2.67 1258 AM 10/13 Co-Op Observer 1 NE Dwtn Rapid City 2.65 600 AM 10/13 CoCoRaHS 1 E Dwtn Rapid City 2.63 600 PM 10/12 Official NWS Obs 2 S Pactola Resv 2.60 600 AM 10/13 CoCoRaHS 4 WNW Dwtn Rapid Cit 2.54 700 AM 10/13 CoCoRaHS 4 S Dwtn Rapid City 2.42 700 AM 10/13 NWS Employee 3 S Mystic 2.40 723 PM 10/12 Trained Spotter 4 WNW Rapid City Arp 2.31 700 AM 10/13 CoCoRaHS 3 W Scenic 2.17 700 AM 10/13 CoCoRaHS 2 SE Dwtn Rapid City 1.80 900 AM 10/12 Public Wall 1.76 800 AM 10/13 CoCoRaHS 2 ENE Wall 1.67 700 AM 10/13 CoCoRaHS 6 W New Underwood 1.64 700 AM 10/13 CoCoRaHS 1 SSW Box Elder 1.62 700 AM 10/13 CoCoRaHS 4 N Johnson Siding 1.50 922 AM 10/12 Trained Spotter 3 SE Rapid Valley 1.25 800 AM 10/12 Public 4 S New Underwood 1.10 900 AM 10/12 CoCoRaHS ...Todd County... 4 NW Parmelee 4.52 700 AM 10/13 CoCoRaHS 14 S Mission 3.69 700 AM 10/13 Co-Op Observer 16 SSE Mission 2.96 600 AM 10/13 CoCoRaHS ...Tripp County... 2 W Clearfield 4.61 802 AM 10/13 Public 9 N Wewela 4.50 700 AM 10/13 CoCoRaHS 1 NE Ideal 3.93 600 AM 10/13 CoCoRaHS 6 N Hamill 3.87 600 AM 10/13 CoCoRaHS 9 ENE Wewela 3.73 600 AM 10/13 CoCoRaHS 2 SSE Ideal 3.60 600 AM 10/13 CoCoRaHS WYOMING ...Campbell County... Wright 1.84 700 AM 10/13 CoCoRaHS 5 SSE Dwtn Gillette 1.53 700 AM 10/13 CoCoRaHS 4 SE Gillette 1.46 530 PM 10/12 Co-Op Observer 14 NNW Dwtn Gillette 1.11 700 AM 10/12 CoCoRaHS 3 S Dwtn Gillette 1.11 700 AM 10/12 CoCoRaHS ...Weston County... 1 WNW Clareton 2.04 700 AM 10/12 CoCoRaHS 5 SW Upton 1.06 700 AM 10/13 CoCoRaHS ...PRELIMINARY RAINFALL TOTALS (AT LEAST 1.00 INCH) SORTED BY MAGNITUDE... LOCATION TOTAL RAIN COMMENTS IN/S/ 5 ESE Norris SD 5.10 1021 AM 10/13/2023 9 N Cedar Butte SD 4.78 600 AM 10/13/2023 2 W Clearfield SD 4.61 802 AM 10/13/2023 4 NW Parmelee SD 4.52 700 AM 10/13/2023 9 N Wewela SD 4.50 700 AM 10/13/2023 4 NE Wood SD 4.37 700 AM 10/13/2023 1 SW Hermosa SD 4.28 754 AM 10/13/2023 Hermosa SD 4.14 600 AM 10/13/2023 3 NE Norris SD 3.95 500 AM 10/13/2023 1 NE Ideal SD 3.93 600 AM 10/13/2023 6 N Hamill SD 3.87 600 AM 10/13/2023 7 N Wood SD 3.83 600 AM 10/13/2023 9 ENE Wewela SD 3.73 600 AM 10/13/2023 14 S Mission SD 3.69 700 AM 10/13/2023 7 WSW Fairburn SD 3.67 700 AM 10/13/2023 2 SSE Ideal SD 3.60 600 AM 10/13/2023 1 NW Hermosa SD 3.60 700 AM 10/13/2023 6 W Hermosa SD 3.48 700 AM 10/13/2023 7 WSW Folsom SD 3.33 500 AM 10/13/2023 9 ENE Hayward SD 3.32 800 AM 10/13/2023 Oral SD 3.29 700 AM 10/13/2023 12 ENE Buffalo Gap SD 3.20 835 AM 10/13/2023 2 SSW Ardmore SD 3.15 700 AM 10/13/2023 5 ENE Custer SD 3.11 700 AM 10/13/2023 5 WNW Hermosa SD 3.08 917 PM 10/12/2023 3 NE Hisega SD 3.06 700 AM 10/13/2023 3 ENE Kyle SD 3.06 700 AM 10/13/2023 2 SSW Norris SD 3.06 700 AM 10/13/2023 Hot Springs SD 3.04 700 AM 10/13/2023 4 W Dwtn Rapid City SD 2.99 700 AM 10/13/2023 1 N Hisega SD 2.99 700 AM 10/13/2023 1 NNW Piedmont SD 2.96 728 PM 10/12/2023 4 NNE Johnson Siding SD 2.96 800 AM 10/13/2023 16 SSE Mission SD 2.96 600 AM 10/13/2023 12 S Quinn SD 2.94 800 AM 10/13/2023 2 WNW Dwtn Rapid City SD 2.90 700 AM 10/13/2023 3 NNE Johnson Siding SD 2.85 700 AM 10/13/2023 12 NNW White River SD 2.82 700 AM 10/13/2023 2 SW Dwtn Rapid City SD 2.78 626 PM 10/12/2023 4 NW Dwtn Rapid City SD 2.75 700 AM 10/13/2023 8 E Martin SD 2.75 700 AM 10/13/2023 1 ESE Pactola Resv SD 2.75 900 AM 10/13/2023 1 N Johnson Siding SD 2.73 800 AM 10/13/2023 2 SSE Dwtn Rapid City SD 2.72 700 AM 10/13/2023 Hill City SD 2.70 928 AM 10/13/2023 3 E Midland SD 2.68 700 AM 10/13/2023 Mount Rushmore SD 2.67 1258 AM 10/13/2023 3 SE Philip SD 2.67 644 AM 10/13/2023 1 NE Dwtn Rapid City SD 2.65 600 AM 10/13/2023 1 E Dwtn Rapid City SD 2.63 600 PM 10/12/2023 2 S Pactola Resv SD 2.60 600 AM 10/13/2023 4 WNW Dwtn Rapid City SD 2.54 700 AM 10/13/2023 3 WNW Kadoka SD 2.53 500 AM 10/13/2023 1 ENE Custer SD 2.44 700 AM 10/13/2023 4 S Dwtn Rapid City SD 2.42 700 AM 10/13/2023 3 S Mystic SD 2.40 723 PM 10/12/2023 4 WNW Rapid City Arpt SD 2.31 700 AM 10/13/2023 1 S Hot Springs SD 2.26 800 AM 10/13/2023 3 W Scenic SD 2.17 700 AM 10/13/2023 1 WNW Clareton WY 2.04 700 AM 10/12/2023 2 ENE Edgemont SD 2.00 700 AM 10/13/2023 5 W Ellsworth AFB SD 1.99 700 AM 10/13/2023 4 NNE Summerset SD 1.86 550 AM 10/13/2023 Piedmont SD 1.86 700 AM 10/13/2023 Wright WY 1.84 700 AM 10/13/2023 2 SE Dwtn Rapid City SD 1.80 900 AM 10/12/2023 Wall SD 1.76 800 AM 10/13/2023 Tilford SD 1.76 700 AM 10/13/2023 Martin SD 1.68 345 PM 10/12/2023 3 ESE Cheyenne Crossing SD 1.67 700 AM 10/13/2023 2 ENE Wall SD 1.67 700 AM 10/13/2023 6 W New Underwood SD 1.64 700 AM 10/13/2023 1 SSW Box Elder SD 1.62 700 AM 10/13/2023 6 NE Summerset SD 1.56 700 AM 10/13/2023 5 SSE Dwtn Gillette WY 1.53 700 AM 10/13/2023 4 N Johnson Siding SD 1.50 922 AM 10/12/2023 4 SE Gillette WY 1.46 530 PM 10/12/2023 Lead SD 1.40 900 AM 10/13/2023 3 WSW Wanblee SD 1.34 700 AM 10/12/2023 Angostura Res SD 1.32 700 AM 10/12/2023 3 SE Rapid Valley SD 1.25 800 AM 10/12/2023 9 SE Kirley SD 1.25 800 AM 10/13/2023 7 NNE Ellsworth AFB SD 1.24 700 AM 10/13/2023 14 NW Edgemont SD 1.23 800 AM 10/13/2023 1 NNE Edgemont SD 1.20 700 AM 10/13/2023 2 E Sturgis SD 1.19 700 PM 10/12/2023 14 NNW Dwtn Gillette WY 1.11 700 AM 10/12/2023 3 S Dwtn Gillette WY 1.11 700 AM 10/12/2023 4 S New Underwood SD 1.10 900 AM 10/12/2023 2 NW Central City SD 1.08 729 AM 10/13/2023 5 SW Upton WY 1.06 700 AM 10/13/2023
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