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Overview

After a derecho moved through the region on July 28, 2025, a second round of thunderstorms developed over central South Dakota late in the afternoon of the 29th.   Several clusters of thunderstorms moves southeast through the evening hours.  While these thunderstorms were not as organized and powerful as the storms the evening prior, they were capable or producing fairly widespread 60 to 75 mph wind gusts through the region.  

In addition to the strong wind gusts, locally heavy rainfall was reported across northwestern Iowa, with upwards of 2 to 5 inches of rain observed. 

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Radar Reflectivity - July 29, 2025
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Severe Weather Warnings - July 29, 2025 Local Storm Reports - July 29, 2025 Rainfall Totals July 29, 2025

Storm Reports

Local Storm Reports - July 29, 2025
Preliminary Local Storm Report...Summary
National Weather Service Sioux Falls SD
456 PM CDT Wed Jul 30 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0510 PM     Tstm Wnd Dmg     5 S Chamberlain         43.74N 99.31W
07/29/2025                   Brule              SD   CO-OP Observer

            Several trees blown over. Very strong winds
            tore off part of roof of house.

0542 PM     Tstm Wnd Gst     14 W Platte             43.39N 99.12W
07/29/2025  M61 MPH          Charles Mix        SD   Mesonet

            Mesonet station 154 SD RWIS Platte-Winner
            Bridge.

0546 PM     Tstm Wnd Gst     9 SW Platte             43.30N 98.99W
07/29/2025  M59 MPH          Charles Mix        SD   Mesonet

            Public Mesonet Wind Observation.

0608 PM     Tstm Wnd Dmg     7 N Platte              43.49N 98.85W
07/29/2025                   Charles Mix        SD   Trained Spotter

            Strong winds. Large healthy tree branch
            down, estimated 8-9 inches in diameter. Time
            estimated via radar.

0618 PM     Tstm Wnd Gst     5 W Plankinton          43.71N 98.58W
07/29/2025  M60 MPH          Aurora             SD   Mesonet

            Mesonet station 214 SD RWIS Plankinton.

0623 PM     Tstm Wnd Gst     5 W Plankinton          43.71N 98.58W
07/29/2025  M61 MPH          Aurora             SD   Mesonet

            Mesonet station 214 SD RWIS Plankinton.

0646 PM     Tstm Wnd Gst     3 N Mitchell            43.77N 98.04W
07/29/2025  M63 MPH          Davison            SD   ASOS

            ASOS station KMHE Mitchell Municipal
            Airport.

0652 PM     Tstm Wnd Gst     3 S Corsica             43.38N 98.41W
07/29/2025  M63 MPH          Douglas            SD   Mesonet

            Mesonet station 304 SD RWIS Corsica.

0658 PM     Tstm Wnd Gst     8 WNW Dimock            43.51N 98.14W
07/29/2025  M62 MPH          Davison            SD   Mesonet

            Reported via mobile mesonet on X.

0701 PM     Tstm Wnd Gst     4 N Fulton              43.79N 97.83W
07/29/2025  M73 MPH          Hanson             SD   Public

            Personal weather station.

0714 PM     Tstm Wnd Gst     2 NW Tripp              43.24N 97.99W
07/29/2025  M61 MPH          Hutchinson         SD   Mesonet

            Mesonet station 26 SD RWIS Tripp.

0715 PM     Tstm Wnd Gst     4 ENE Alexandria        43.67N 97.71W
07/29/2025  M60 MPH          Hanson             SD   Mesonet

            Mesonet station 213 SD RWIS Alexandria.

0720 PM     Tstm Wnd Gst     2 NW Tripp              43.24N 97.99W
07/29/2025  M68 MPH          Hutchinson         SD   Mesonet

            Mesonet station 26 SD RWIS Tripp.

0725 PM     Hail             1 E Fulda               43.87N 95.59W
07/29/2025  M0.75 Inch       Murray             MN   Public



0732 PM     Tstm Wnd Gst     1 SW Tyndall            42.98N 97.87W
07/29/2025  M60 MPH          Bon Homme          SD   Public

            Personal weather system.

0735 PM     Tstm Wnd Dmg     Bridgewater             43.55N 97.50W
07/29/2025                   McCook             SD   Emergency Mngr

            Scattered tree damage throughout the city of
            Bridgewater.

0735 PM     Tstm Wnd Gst     Bridgewater             43.55N 97.51W
07/29/2025  E75 MPH          McCook             SD   Emergency Mngr



0745 PM     Tstm Wnd Gst     5 S Freeman             43.28N 97.42W
07/29/2025  M62 MPH          Hutchinson         SD   Mesonet

            Mesonet station 163 SD RWIS Freeman.

0745 PM     Tstm Wnd Gst     4 W Dolton              43.48N 97.46W
07/29/2025  M70 MPH          Hutchinson         SD   Public

            Personal weather station.

0745 PM     Hail             4 W Heron Lake          43.79N 95.41W
07/29/2025  M1.00 Inch       Jackson            MN   Public



0749 PM     Tstm Wnd Gst     4 NNE Freeman           43.40N 97.41W
07/29/2025  M75 MPH          Hutchinson         SD   Public

            Personal weather station.

0750 PM     Tstm Wnd Gst     4 N Dolton              43.54N 97.39W
07/29/2025  M67 MPH          McCook             SD   Mesonet

            Mesonet station 322 SD RWIS STANLEY CORNER.

0800 PM     Tstm Wnd Gst     2 ESE Marion            43.41N 97.22W
07/29/2025  M69 MPH          Turner             SD   Public

            Personal weather station.

0805 PM     Tstm Wnd Gst     4 E Dolton              43.49N 97.31W
07/29/2025  M64 MPH          Turner             SD   Public

            Personal weather station.

0806 PM     Tstm Wnd Gst     5 SW Hurley             43.23N 97.17W
07/29/2025  E69 MPH          Turner             SD   Mesonet

            First severe gust at 806 pm, peak of 69 mph
            at 816 pm. Hurley SDSU Mesonet site.

0830 PM     Tstm Wnd Gst     3 ESE Parker            43.37N 97.08W
07/29/2025  M59 MPH          Turner             SD   Mesonet

            Mesonet station 310 SD RWIS Parker.

0833 PM     Tstm Wnd Gst     4 WSW Rowena            43.51N 96.64W
07/29/2025  M59 MPH          Minnehaha          SD   Public

            Personal weather station.

0848 PM     Tstm Wnd Gst     4 E Irene               43.08N 97.08W
07/29/2025  M60 MPH          Turner             SD   Mesonet

            Mesonet station 320 SD RWIS IRENE.

0851 PM     Tstm Wnd Gst     3 SSW Beresford         43.04N 96.80W
07/29/2025  M63 MPH          Union              SD   Mesonet

            Mesonet station 16 SD RWIS Beresford.

0851 PM     Tstm Wnd Gst     6 SSE Centerville       43.04N 96.90W
07/29/2025  M70 MPH          Clay               SD   Mesonet

            Mesonet station BFMS2 Beresford 7 WSW (SD
            Mesonet).

0852 PM     Tstm Wnd Gst     1 SSW Vermillion        42.77N 96.93W
07/29/2025  M61 MPH          Clay               SD   AWOS

            AWOS station KVMR Vermillion.

0854 PM     Tstm Wnd Gst     1 NW Beresford          43.09N 96.79W
07/29/2025  M72 MPH          Lincoln            SD   Public

            Personal weather station.

0855 PM     Tstm Wnd Gst     2 WSW Gayville          42.88N 97.22W
07/29/2025  M58 MPH          Yankton            SD   Mesonet

            Mesonet station 197 SD RWIS Gayville.

0857 PM     Tstm Wnd Gst     1 NNE Beresford         43.09N 96.78W
07/29/2025  M66 MPH          Lincoln            SD   Public

            Personal weather station.

0857 PM     Tstm Wnd Gst     6 N Vermillion          42.86N 96.91W
07/29/2025  M60 MPH          Clay               SD   Public

            Personal weather station.

0900 PM     Tstm Wnd Dmg     Newcastle               42.65N 96.87W
07/29/2025                   Dixon              NE   Trained Spotter

            NE Highway 12 blocked by several large trees
            down in Newcastle.

0905 PM     Tstm Wnd Gst     3 SSW Beresford         43.04N 96.80W
07/29/2025  M73 MPH          Union              SD   Mesonet

            Mesonet station 16 SD RWIS Beresford.

0915 PM     Tstm Wnd Gst     3 NW Ponca              42.59N 96.75W
07/29/2025  M62 MPH          Dixon              NE   Public

            Personal weather station.

0925 PM     Tstm Wnd Dmg     Wakefield               42.27N 96.87W
07/29/2025                   Dixon              NE   CO-OP Observer

            Large section of a 50-60 foot tree down at
            the cemetery. Other spotty wind damage
            around town to tree limbs.

0925 PM     Tstm Wnd Gst     1 E Remsen              42.81N 95.96W
07/29/2025  M62 MPH          Plymouth           IA   Public

            Personal weather station.

0933 PM     Tstm Wnd Gst     4 WSW North Sioux City  42.52N 96.57W
07/29/2025  M67 MPH          Union              SD   Public

            Personal weather station.

0935 PM     Tstm Wnd Gst     3 SE Jefferson          42.57N 96.53W
07/29/2025  M68 MPH          Union              SD   Dept of Highways

            Mesonet station 53 SD RWIS North Sioux City.

0937 PM     Tstm Wnd Gst     4 SSW Newcastle         42.60N 96.91W
07/29/2025  M60 MPH          Dixon              NE   Public

            Personal weather station.

0942 PM     Tstm Wnd Gst     6 SSE Westfield         42.67N 96.55W
07/29/2025  M66 MPH          Plymouth           IA   Mesonet

            Personal weather station.

0959 PM     Tstm Wnd Gst     1 WSW Sioux City        42.50N 96.41W
07/29/2025  M58 MPH          Woodbury           IA   Public

            Personal weather station.

1001 PM     Tstm Wnd Gst     2 SW Sergeant Bluff     42.38N 96.38W
07/29/2025  M59 MPH          Woodbury           IA   ASOS

            ASOS station KSUX Sioux Gateway Airport.

1221 AM     Flash Flood      3 SSW Alton             42.95N 96.03W
07/30/2025                   Sioux              IA   Law Enforcement

            Hwy 60 near 480th closed due the roadway
            being flooded.

0205 AM     Flash Flood      2 NNE Struble           42.92N 96.18W
07/30/2025                   Sioux              IA   Other Federal

            The Floyd River near Struble rose nearly 8
            feet in 3 hours to flood stage.

 


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