Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >
Overview
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A significant low pressure system approached the northern plains on Friday, April 22. Ahead of this system, warm, moist air was advected into our region. Thunderstorms began to develop early Friday evening, some of which became severe, dropping large hail and producing strong winds. Several places received an inch or two of rain, much needed in our current drought situation. Storms moved eastward and dissipated Friday night. On Saturday morning, precipitation increased again, and rain changed over to snow. Northwesterly winds became strong, gusting to 70+ mph in some locations. The strong winds combined with the falling snow created very poor visibilities and hazardous travel conditions. Some areas received heavy snow, but even in areas that didn't receive heavy snow, the blowing snow caused blizzard conditions. |
 West of Gillette (A. Cope) |
Severe Thunderstorms:
Friday, April 22
Severe thunderstorms brought strong winds, large hail, and heavy rain to the area.
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| Rapid City (P. Hill) | Edgemont (J. Essink) | 7 S Custer (L. Piggott) | 2 W Hot Springs (J. Burgess) |
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| North of Oglala (E. Ludes) | Badlands (J. Tang) |
Snowstorm/Blizzard:
Saturday and Sunday, April 23-24
Rain changed to snow by early Saturday morning. Some places received heavy snowfall, while other places had snowmelt as it fell. Gusty winds brought low visibility and blizzard conditions to much of the area, which caused hazardous travel.
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| Gillette (B. Miller) | Scenic (B.J. Walker) | 19 N Camp Crook (E. Klocksiem) | Lead (L.J. Osburne) |
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| By New Underwood (SD Public Safety) | West of Gillette (A. Cope) | South of Buffalo (B. Wardell) | 5 E Pringle (T. Carlin) |
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| Belle Fourche (K. Benson Owen) | Spearfish (@aowolf) | Gillette (A. Herman) | Gillette (R. Hoffman) |
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| Lead (S. Mason) | Spearfish (E. Elder) | Spearfish (D. Krugman) | Buffalo Chip (R. Gutknecht) |
Conditions on I-90 East of Box Elder towards Wall. Thanks so Much Amanda Webster...@NWSRapidCity pic.twitter.com/YhkUnORUQE
— Brant Beckman (@BrantBeckmanwx) April 23, 2022
I-90 is shut down from mile marker 67 to 110. pic.twitter.com/ER3FPv635y
— Pennington County SO (@PennCoSheriff) April 23, 2022
I-90 is closing at 7 PM MT from Sturgis to the WY state line. Yes, it is that bad - as you can see. Stay home and stay safe. #KeepSDsafe pic.twitter.com/ueNaaEdMws
— SDPublicSafety (@SDPublicSafety) April 24, 2022
Radar
Severe thunderstorms on Friday, April 22
Storms ending, and rain changing to snow on Saturday, April 23
Storm Reports
...PRELIMINARY SNOW AND SLEET TOTALS SORTED BY MAGNITUDE... LOCATION SNOWFALL COMMENTS IN/S/ Lead SD 22.0 900 AM 4/24/2022 4 SE Dwtn Gillette WY 19.0 430 PM 4/24/2022 3 SW Whitewood SD 18.0 1148 AM 4/24/2022 8 NW Rockypoint WY 18.0 921 AM 4/24/2022 1 NNW Dwtn Spearfish SD 15.8 900 AM 4/24/2022 12 WSW Dwtn Gillette WY 15.0 600 AM 4/24/2022 6 E Deadwood SD 15.0 352 PM 4/24/2022 4 S Devils Tower WY 15.0 1223 PM 4/24/2022 8 NW Terry Peak SD 14.0 312 PM 4/23/2022 3 SSE Harding SD 14.0 800 AM 4/24/2022 Dwtn Spearfish SD 12.0 556 PM 4/23/2022 14 WNW Ladner SD 12.0 600 AM 4/24/2022 Dwtn Gillette WY 11.5 415 PM 4/23/2022 5 SW Nemo SD 10.5 1223 PM 4/24/2022 10 SSW Reva SD 10.0 600 AM 4/24/2022 Cheyenne Crossing SD 10.0 707 AM 4/24/2022 13 W Lodgepole SD 9.0 908 PM 4/23/2022 Newcastle WY 9.0 736 AM 4/24/2022 Saint Onge SD 8.0 1004 AM 4/24/2022 3 NE Whitewood SD 8.0 1024 AM 4/24/2022 2 ENE Weston WY 8.0 600 AM 4/24/2022 1 SE Ladner SD 8.0 250 PM 4/23/2022 1 NE Upton WY 7.0 747 AM 4/24/2022 1 SW Shadehill SD 7.0 600 AM 4/24/2022 5 S Lodgepole SD 7.0 251 PM 4/23/2022 2 WNW Dwtn Spearfish SD 6.0 321 PM 4/23/2022 2 N Four Corners WY 6.0 453 PM 4/23/2022 Moorcroft WY 6.0 439 PM 4/23/2022 Lemmon SD 5.5 632 PM 4/24/2022 5 NNE Belle Fourche Resv SD 5.0 600 AM 4/24/2022 2 W Custer SD 5.0 1009 AM 4/24/2022 7 S Custer SD 5.0 534 PM 4/23/2022 5 E Newell SD 5.0 1225 PM 4/24/2022 5 ESE Elm Springs SD 4.0 538 PM 4/23/2022 2 ESE Belle Fourche Resv SD 4.0 600 AM 4/24/2022 Tilford SD 4.0 126 PM 4/24/2022 Beulah WY 4.0 247 PM 4/23/2022 1 SSW Rockerville SD 4.0 1225 PM 4/24/2022 1 N Hot Springs SD 3.5 1227 PM 4/24/2022 8 SSW Union Center SD 3.0 338 PM 4/23/2022 7 SE Mud Butte SD 3.0 329 PM 4/23/2022 3 N Johnson Siding SD 2.0 325 PM 4/23/2022 14 SSE Dupree SD 1.8 800 AM 4/24/2022 ...MAXIMUM OBSERVED WINDS SORTED BY MAGNITUDE... LOCATION MAX WIND COMMENTS MPH 1 E Dwtn Rapid City SD 76 129 AM 4/24/2022 Rapid City Arpt SD 76 923 AM 4/23/2022 25 ESE Wright WY 72 305 PM 4/23/2022 1 E Lead SD 71 1210 AM 4/24/2022 1 N Buffalo SD 71 601 PM 4/23/2022 5 WNW New Underwood SD 70 928 PM 4/23/2022 1 W Box Elder SD 70 938 AM 4/23/2022 3 NW Wasta SD 70 957 PM 4/23/2022 13 SSW Reva SD 68 245 PM 4/23/2022 12 WSW Castle Rock SD 68 630 PM 4/23/2022 1 ENE Mud Butte SD 68 355 PM 4/23/2022 1 NE Echeta WY 68 351 PM 4/23/2022 10 W Edgemont SD 68 1234 PM 4/23/2022 7 E Sturgis SD 68 655 AM 4/24/2022 3 NNW Scenic SD 68 1110 PM 4/23/2022 Ellsworth AFB SD 67 843 PM 4/23/2022 8 S Wall SD 67 120 AM 4/24/2022 4 E Cactus Flat SD 66 646 PM 4/23/2022 8 N Redig SD 66 313 AM 4/24/2022 11 W Hot Springs SD 64 352 PM 4/23/2022 1 NNE Faith SD 64 1018 PM 4/23/2022 4 N Ludlow SD 64 607 PM 4/23/2022 1 NE Midland SD 63 510 PM 4/23/2022 7 WSW Hoover SD 63 1159 PM 4/23/2022 5 NNW Dwtn Gillette WY 63 540 PM 4/23/2022 7 NNE Ralph SD 62 349 AM 4/24/2022 10 NNW Ottumwa SD 62 509 AM 4/24/2022 Four Corners WY 62 236 PM 4/23/2022 3 E Philip SD 62 310 AM 4/24/2022 7 SSE Meadow SD 61 1036 PM 4/23/2022 6 W Parmelee SD 61 728 AM 4/24/2022 15 SSE Mission SD 61 700 AM 4/24/2022 8 SSW Union Center SD 60 338 PM 4/23/2022 9 ENE Belvidere SD 60 754 AM 4/24/2022 5 ESE Elm Springs SD 60 538 PM 4/23/2022 7 E Wanblee SD 60 938 PM 4/23/2022 1 NE Winner SD 59 941 AM 4/24/2022 13 NW Belle Fourche SD 59 652 PM 4/23/2022 2 NNW Pactola Res SD 59 229 AM 4/24/2022 1 NNW Piedmont SD 59 720 AM 4/24/2022 13 NNE Wright WY 58 236 PM 4/23/2022 4 S Dwtn Rapid City SD 58 1140 PM 4/23/2022 8 WNW Fairburn SD 58 1018 AM 4/23/2022 16 WSW Dwtn Gillette WY 58 212 PM 4/23/2022 2 SSW Custer SD 58 503 PM 4/23/2022 4 E Dwtn Spearfish SD 58 735 PM 4/23/2022 8 W Jewel Cave SD 58 416 PM 4/23/2022 3 W Lemmon SD 58 700 PM 4/23/2022 3 SE Dwtn Spearfish SD 57 811 PM 4/23/2022 11 SW Parmelee SD 57 1132 PM 4/23/2022 3 W Union Center SD 56 249 PM 4/23/2022 5 NE Porcupine SD 56 1241 AM 4/24/2022 1 SSW Rozet WY 56 1100 AM 4/23/2022 2 ENE Rockerville SD 55 1000 PM 4/23/2022 4 SSE Witten SD 55 840 AM 4/24/2022 Wasta SD 55 930 PM 4/23/2022 8 SSW Folsom SD 54 735 AM 4/23/2022 Wright WY 54 116 PM 4/23/2022 1 NNW Nisland SD 54 345 PM 4/23/2022 Tilford SD 54 319 PM 4/23/2022 7 S Shadehill SD 53 1108 PM 4/23/2022 9 ENE Hayward SD 53 827 AM 4/24/2022 6 WNW Newcastle WY 53 115 PM 4/23/2022 Beulah WY 53 952 PM 4/23/2022 7 ESE Rosebud SD 53 725 AM 4/24/2022 Wewela SD 53 424 AM 4/24/2022 9 NNE Edgemont SD 52 757 PM 4/23/2022 3 E Dwtn Gillette WY 52 645 PM 4/23/2022 2 SW Bridger SD 52 229 AM 4/24/2022 2 E Cottonwood SD 52 225 AM 4/24/2022 27 WNW Castle Rock SD 52 456 PM 4/23/2022 12 E Oelrichs SD 51 405 PM 4/23/2022 1 ESE Martin SD 51 615 AM 4/24/2022 7 NW Rockypoint WY 51 630 PM 4/23/2022 10 W Reva SD 50 805 PM 4/23/2022 1 SW Newell SD 50 510 PM 4/23/2022 10 ESE Pine Haven WY 50 222 PM 4/23/2022 4 NW Cheyenne Crossing SD 50 1158 PM 4/23/2022 2 W Hamill SD 50 820 AM 4/24/2022 ...MAXIMUM HAIL SIZE SORTED BY MAGNITUDE... LOCATION MAX SIZE COMMENTS IN/S/ Cottonwood SD 3.50 555 PM 4/22/2022 1 WNW Sharps Corner SD 2.50 432 PM 4/22/2022 1 SSW Custer SD 2.00 820 PM 4/22/2022 Custer SD 1.75 825 PM 4/22/2022 7 SW Custer SD 1.75 814 PM 4/22/2022 19 S Quinn SD 1.75 516 PM 4/22/2022 20 S South Eagle Butte SD 1.75 730 PM 4/22/2022 12 N Kyle SD 1.75 456 PM 4/22/2022 17 N Philip SD 1.75 630 PM 4/22/2022 4 SE Wind Cave Visitors Cente 1.75 933 PM 4/22/2022 4 W Pringle SD 1.50 806 PM 4/22/2022 4 NW Kirley SD 1.50 710 PM 4/22/2022 11 N Philip SD 1.50 627 PM 4/22/2022 12 W Philip SD 1.25 600 PM 4/22/2022 5 SSW Custer SD 1.25 815 PM 4/22/2022 3 SE Deerfield SD 1.25 815 PM 4/22/2022 5 SSE Ideal SD 1.25 717 PM 4/22/2022 Box Elder SD 1.00 926 PM 4/22/2022 Sharps Corner SD 1.00 435 PM 4/22/2022 5 NNW Fairburn SD 1.00 926 PM 4/22/2022 9 SSW Jewel Cave SD 0.88 755 PM 4/22/2022 15 ENE Cherry Creek SD 0.88 733 PM 4/22/2022 2 S Lead SD 0.88 831 PM 4/22/2022 8 W Billsburg SD 0.88 645 PM 4/22/2022 1 S Oglala SD 0.88 335 PM 4/22/2022 5 ESE Hot Springs SD 0.75 917 PM 4/22/2022 1 NNW Piedmont SD 0.75 922 PM 4/22/2022 3 N Johnson Siding SD 0.70 911 PM 4/22/2022 15 SW Billsburg SD 0.70 620 PM 4/22/2022 15 NW Edgemont SD 0.70 737 PM 4/22/2022 6 WNW Custer SD 0.70 830 PM 4/22/2022 ...PRELIMINARY RAINFALL TOTALS SORTED BY MAGNITUDE... LOCATION TOTAL RAIN COMMENTS IN/S/ 1 SSW Opal SD 2.40 950 AM 4/23/2022 Buffalo SD 2.36 630 AM 4/23/2022 2 ESE Belle Fourche Resv SD 2.00 1100 PM 4/22/2022 11 SW Buffalo SD 1.46 900 AM 4/23/2022 2 WNW Dwtn Spearfish SD 1.28 700 AM 4/23/2022
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