National Weather Service Weather Forecast Office

Thunderstorms which moved across south-central and southeast South Dakota Tuesday evening produced many reports of damaging winds of 60 to 70 mph. Thunderstorms weakened as they moved into southwest Minnesota.  

Below is a map showing the location of the reports received by the National Weather Service in Sioux Falls so far.  An interactive version of this map can be found at http://www.wrh.noaa.gov/sgx/kml/lsr.php?cwa=fsd&lsr=All&start=201107270100&end=201107270600. 

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE SIOUX FALLS SD
ISSUED 221 AM CDT WED JUL 27 2011

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

0815 PM     TSTM WND GST     12 N WESSINGTON         44.62N 98.65W
07/26/2011  E60.00 MPH       BEADLE             SD   TRAINED SPOTTER

0843 PM     TSTM WND GST     5 WSW WOLSEY            44.38N 98.56W
07/26/2011  E60.00 MPH       BEADLE             SD   TRAINED SPOTTER

0845 PM     TSTM WND GST     SSE WOLSEY              44.41N 98.47W
07/26/2011  E60.00 MPH       BEADLE             SD   TRAINED SPOTTER

            WINDS ESTIMATED AT 60 MPH KNOCKED SOME SMALL BRANCHES
            DOWN FROM TREES IN SPOTTERS YARD.

0852 PM     TSTM WND GST     HURON                   44.36N 98.22W
07/26/2011  M70.00 MPH       BEADLE             SD   ASOS

0912 PM     TSTM WND GST     YALE                    44.43N 97.99W
07/26/2011  E70.00 MPH       BEADLE             SD   TRAINED SPOTTER

1010 PM     TSTM WND GST     11 SW WESSINGTON SPRING 43.98N 98.74W
07/26/2011  E60.00 MPH       JERAULD            SD   TRAINED SPOTTER

1025 PM     TSTM WND GST     3 ESE LANE              44.06N 98.37W
07/26/2011  E70.00 MPH       JERAULD            SD   TRAINED SPOTTER

1105 PM     TSTM WND GST     3 ENE CARTHAGE          44.19N 97.65W
07/26/2011  E60.00 MPH       MINER              SD   TRAINED SPOTTER

            THUNDERSTORM WIND GUSTS ESTIMATED AT 60 MPH WITH HEAVY
            RAIN AND FREQUENT LIGHTNING.

1205 AM     TSTM WND GST     2 W SALEM               43.73N 97.43W
07/27/2011  E60.00 MPH       MCCOOK             SD   TRAINED SPOTTER

1235 AM     TSTM WND GST     6 NNE HUMBOLDT          43.72N 97.01W
07/27/2011  E60.00 MPH       MINNEHAHA          SD   TRAINED SPOTTER

            THUNDERSTORM WIND GUSTS ESTIMATED AT 60 MPH KNOCKED DOWN
            2 TO 3 INCH DIAMETER TREE BRANCHES. HEAVY RAIN
            ACCOMPANIED THE STORM.