Public Information Statement
Issued by NWS Aberdeen, SD
Issued by NWS Aberdeen, SD
479 NOUS43 KABR 020000 AAC PNSABR SDZ009-021200- Public Information Statement...UPDATED National Weather Service Aberdeen SD 700 PM CDT Sun Sep 1 2024 ...NWS Damage Survey for 8/28/24 Tornado Event Update #3... Update...the damage survey has been updated based on the collection of multiple data sources. Data from the original ground survey broke the path into three separate tracks. However, with the review of drone and high-resolution satellite imagery, there is evidence of a continuous track from beginning to end. The event was very complicated with many smaller tornadoes/vortices embedded within, or rotating around, the main circulation. This resulted in sporadic, intense areas of multi-directional tornado damage, as well as areas of very broad uniform damage. Experts were also consulted to determine wind speeds based on the electric transmission tower damage indicators. Path length, width, and peak winds were all increased with this update. .Southwest Mound City Tornado #1... Rating: EF2 Estimated Peak Wind: 130 mph Path Length /statute/: 5.42 miles Path Width /maximum/: 200 yards Fatalities: 0 Injuries: 0 Start Date: 08/28/2024 Start Time: 07:50 PM CDT Start Location: 8 WSW Mound City / Campbell County / SD Start Lat/Lon: 45.6837 / -100.2431 End Date: 08/28/2024 End Time: 08:20 PM CDT End Location: 6 SW Mound City / Campbell County / SD End Lat/Lon: 45.6695 / -100.159 Survey Summary: Around 7:50 pm CDT, the tornado touched down on the west side of SDHWY 1804, just north of 118th St. Within a few minutes of being on the ground, it tracked east and crossed SDHWY 1804, tossing hay bales in its path. Between 8:00-8:05 pm CDT, the tornado continued in a more southeast direction, crossing 118th St and encountering an electric transmission line, resulting in the collapse of three electrical transmission towers. The tornado then continued east-southeast toward 119th St, where it encountered a farmstead. At this location, multiple trees were broken, snapped, and uprooted. One small shed was lifted, another had its walls collapse, and a machine shed had its doors blown out. The main house lost windows, and a tractor lost its doors facing east and west, although the front and back windshields remained intact. Additionally, a trailer was rolled onto the road, and other farm implements were destroyed or moved. Between 8:05-8:10 pm CDT, the tornado would cross to the south of 119th St, flipping a haybine to the west and through a fence. The main tornadic circulation broadened and tracked east, becoming nearly stationary at times as it traversed over cropland between 299th and 301st Ave. Despite this, many smaller tornadic vortices were noted on video accounts, and the track is evident in drone and high-resolution satellite imagery. Toward the end of the tornado cycle, between roughly 8:15-8:20 pm CDT, it intensified once again, becoming narrower and tracking from southwest to northeast, crossing 119th St between 301st and 302nd Ave. The track was clearly seen through a corn crop before lifting. Around this same time, a distinct smaller tornado/vortex damaged a farmstead. At this location, a tree was uprooted, a silo was dented, and two shop buildings lost roof panels and doors. Additionally, a travel trailer was rolled 100 feet across 119th St, with debris tossed from north-northeast to south-southwest into a cornfield. Two other smaller tornadic circulations were also noted in the corn crop just west of the intersection of 302nd Ave and 119th St. .Southeast Mound City Tornado #2... Rating: EFU Estimated Peak Wind: N/A Path Length /statute/: N/A Path Width /maximum/: N/A Fatalities: 0 Injuries: 0 Start Date: 08/28/2024 Start Time: 08:50 PM CDT Start Location: 3.5 SE Mound City / Campbell County / SD Start Lat/Lon: 45.71 / -100.00 End Date: 08/28/2024 End Time: 08:52 PM CDT End Location: 3.5 SE Mound City / Campbell County / SD End Lat/Lon: 45.71 / -100.00 Survey Summary: Photo evidence of a tornado touchdown roughly 3.5 miles southeast of Mound City continues to be investigated. && EF Scale: The Enhanced Fujita Scale classifies tornadoes into the following categories: EF0.....65 to 85 mph EF1.....86 to 110 mph EF2.....111 to 135 mph EF3.....136 to 165 mph EF4.....166 to 200 mph EF5.....>200 mph NOTE: The information in this statement is preliminary and subject to change pending final review of the event and publication in NWS Storm Data. $$