Heavy rainfall from scattered thunderstorms is expected across the Southwest, Intermountain West, and Plains. Isolated dry thunderstorms may initiate additional fires across the west. The coastal Carolinas may experience flash floods in the coming days due to repeated thunderstorms. Additionally, a wave of intense summer heat will hit the Southern Plains and central Gulf Coast States this week. Read More >
Overview
Severe weather impacted portions of the area on consecutive evenings, Thursday August 10 and Friday August 11. On Thursday, a couple of tornadoes were reported in addition to large hail across southeastern South Dakota. No damage or injuries were reported from these short lived tornadoes. Storms Thursday developed over central South Dakota and moved east/southeast. Large hail and gusty winds impacted portions of southwestern Minnesota and northwestern Iowa on Friday evening, as storms developed and moved east/southeast into these areas.
Data for tornadoes is still considered preliminary and we're still gathering reports; so check back for updates!
Tornadoes:
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Tornado #1 - Mud Lake
Track Map  
Downloadable KMZ File |
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Tornado #2 - Northeast of Lake Preston
Track Map
Downloadable KMZ File |
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The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:
| EF0 Weak 65-85 mph |
EF1 Moderate 86-110 mph |
EF2 Significant 111-135 mph |
EF3 Severe 136-165 mph |
EF4 Extreme 166-200 mph |
EF5 Catastrophic 200+ mph |
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Hail:
Hail
Here's a look at some of the hail which fell Thursday and Friday.
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| Hail Thursday southeast of Alexandria, SD (Jamie Watembach) |
Hail Thursday near Lake Thompson, SD (Morgan Larson) |
Caption (source) |
Caption (source) |
Photos & Video
Check out these additional photos!
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| Tornado North of Lake Preston, SD (Jack Hasche) |
Tornado East of Willow Lake, SD (Heath Seefeldt) |
Storm Structure North of Bridgewater, SD (McCook county EM) |
Video Capture of Tornado Near Spirit Lake, SD (Bob Springer) |
Radar
Radar loops, roughly four hours each, to encompass both nights of severe weather.
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| Radar Loop from 5 PM to 9 PM Thursday. | Radar loop from 9 PM Thursday to 1 AM Friday. | Radar loop from 3 PM to 7 PM Friday. | Radar loop from 7 PM to 11 PM Friday. |
Storm Reports
Preliminary Local Storm Report...Summary
National Weather Service Sioux Falls SD
920 PM CDT Sat Aug 12 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0753 PM Hail Paullina 42.98N 95.69W
08/11/2023 E0.70 inch O`Brien IA Public
Report via social media. Dime sized hail,
winds strong enough to splatter leaves on
the sides of houses and vehicles, and 1.50
inches rainfall.
0734 PM Hail 3 ESE Alton 42.97N 95.96W
08/11/2023 E0.50 inch Sioux IA Public
Report from mPING: Half-inch (0.50 in.).
0505 PM Hail 1 NNE Storden 44.06N 95.31W
08/11/2023 E0.75 inch Cottonwood MN Public
Trained spotter reported pea to dime sized
hail just north of Storden. Time estimated
via radar.
0458 PM Tstm Wnd Dmg 2 N Westbrook 44.07N 95.44W
08/11/2023 Cottonwood MN Public
Report from m:PING: Small tree branches
broken.
0456 PM Hail 5 NE Dovray 44.11N 95.48W
08/11/2023 E0.88 inch Murray MN Public
Trained spotter reported dime to nickel
sized hail northeast of Dovray. Time
estimated with radar.
0447 PM Hail 3 S Tracy 44.19N 95.62W
08/11/2023 E0.25 inch Murray MN Public
Report via social media. Pea sized hail
along with 0.50 inch rainfall.
0429 PM Hail Balaton 44.24N 95.88W
08/11/2023 E1.25 inch Lyon MN Public
Report from mPING: Half Dollar (1.25 in.).
0424 PM Hail 3 WSW Tracy 44.21N 95.68W
08/11/2023 E0.75 inch Lyon MN Emergency Mngr
The Murray County EM reported Dime sized
hail southwest of Tracy. Time estimated via
radar.
0419 PM Hail Florence 44.24N 96.06W
08/11/2023 E1.00 inch Lyon MN Trained Spotter
Pea size transitioned to quarter sized hail
after initial call.
0419 PM Tstm Wnd Gst Florence 44.24N 96.05W
08/11/2023 M56 MPH Lyon MN Mesonet
Mesonet station MN160 U.s.14 - Florence - Mp
21.2. Time estimated with radar.
0417 PM Tstm Wnd Gst 2 N Trosky 43.92N 96.27W
08/11/2023 M53 MPH Pipestone MN Mesonet
Mesonet station MN154 U.s.75 - Trosky - Mp
30.3. Time estimated from radar.
0409 PM Hail 2 NNW Garvin 44.24N 95.78W
08/11/2023 E1.00 inch Lyon MN CO-OP Observer
A COOP observer reported quarter sized hail
8 miles west of Tracy. The time was
estimated via radar.
1002 PM Hail Sioux Falls 43.54N 96.74W
08/10/2023 E0.50 inch Minnehaha SD Public
Report from mPING: Half-inch (0.50 in.).
0958 PM Hail 3 S Sioux Falls 43.50N 96.72W
08/10/2023 E0.50 inch Minnehaha SD Public
Report from mPING: Half-inch (0.50 in.).
0951 PM Hail 4 WSW Sioux Falls 43.52N 96.80W
08/10/2023 E0.75 inch Minnehaha SD Public
Report via social media. Location and time
estimated from radar.
0949 PM Hail 4 N Tea 43.51N 96.83W
08/10/2023 E0.75 inch Minnehaha SD Public
Report from mPING: Dime (0.75 in.).
0949 PM Hail 5 W Sioux Falls 43.53N 96.84W
08/10/2023 E0.50 inch Minnehaha SD Public
Report from mPING: Half-inch (0.50 in.).
0927 PM Hail 4 S Tea 43.40N 96.83W
08/10/2023 E0.75 inch Lincoln SD Public
Report from mPING: Dime (0.75 in.).
0906 PM Hail 3 NNE Madison 44.05N 97.08W
08/10/2023 E1.00 inch Lake SD Trained Spotter
0904 PM Hail Monroe 43.49N 97.22W
08/10/2023 E1.25 inch Turner SD Public
Public report of quarter to half dollar
sized hail. Time estimated by radar.
0847 PM Funnel Cloud 4 SW Ramona 44.07N 97.27W
08/10/2023 Lake SD Storm Chaser
Person was 2 miles southwest of Ramona
looking to the west.
0846 PM Hail Lesterville 43.04N 97.59W
08/10/2023 U1.75 inch Yankton SD Emergency Mngr
0844 PM Hail 2 E Ramona 44.12N 97.17W
08/10/2023 E1.25 inch Lake SD Storm Chaser
0830 PM Funnel Cloud 2 ESE Hetland 44.36N 97.19W
08/10/2023 Kingsbury SD Fire Dept/Rescue
Arlington Fire Department reported funnel.
Radar rotation confirmed time of report.
0815 PM Tornado 2 E Erwin 44.48N 97.40W
08/10/2023 Kingsbury SD Emergency Mngr
Kingsbury EM called to report tornado on the
ground following 200th st, approximately 4
east of 441st ave.
0810 PM Tornado 5 ESE Erwin 44.46N 97.34W
08/10/2023 Kingsbury SD Public
Video of tornado via social media.
0806 PM Hail 5 WSW Bridgewater 43.51N 97.58W
08/10/2023 E1.50 inch McCook SD Public
Delayed social media report of Ping-Pong
Ball sized hail. Time estimated via Radar.
0801 PM Hail 4 SW Lake Preston 44.32N 97.43W
08/10/2023 E1.50 inch Kingsbury SD Public
Report via social media. Time and location
estimated by radar.
0748 PM Tornado 4 W Erwin 44.48N 97.53W
08/10/2023 Kingsbury SD Public
Report relayed through DeSmet Fire, public
reported tornado on the ground.
0745 PM Hail De Smet 44.38N 97.55W
08/10/2023 E0.75 inch Kingsbury SD Public
Report from mPING: Dime (0.75 in.).
0745 PM Hail De Smet 44.39N 97.55W
08/10/2023 E1.00 inch Kingsbury SD Emergency Mngr
EM for Kingsbury county called to report 1
inch hail.
0744 PM Hail De Smet 44.38N 97.55W
08/10/2023 E0.75 inch Kingsbury SD Public
Report from mPING: Dime (0.75 in.).
0739 PM Funnel Cloud 5 E Ethan 43.54N 97.89W
08/10/2023 Hanson SD Law Enforcement
Multiple law enforcement agencies reported a
funnel cloud to the southeast of this
location. Tail was also noted on the
backside of the storm.
0738 PM Hail 6 W Erwin 44.49N 97.56W
08/10/2023 E1.75 inch Kingsbury SD Public
Time estimated via radar.
0736 PM Hail 9 WNW Clayton 43.50N 97.81W
08/10/2023 E1.00 inch Hanson SD Public
Report from mPING: Quarter (1.00 in.).
0643 PM Hail 9 WNW Ethan 43.60N 98.14W
08/10/2023 E1.00 inch Davison SD Trained Spotter
Pea to quarter sized hail, but mostly
quarter sized.
0635 PM Hail 4 S Mount Vernon 43.66N 98.27W
08/10/2023 E1.00 inch Davison SD Public
Report from mPING: Quarter (1.00 in.). Time
estimated from radar.
0548 PM Hail 9 NE Wessington 44.55N 98.56W
08/10/2023 E1.00 inch Beadle SD Public
Report and photo via social media. Largest
stone quarter sized. Time estimated via
radar.
0546 PM Hail 7 NNW Harrison 43.53N 98.60W
08/10/2023 E1.00 inch Aurora SD Trained Spotter
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