Sioux Falls Dodges Severe Wind July 23, 2010

Sioux Falls dodged strong winds Friday night.  Numerous lines of thunderstorms occurred Friday evening and night throughout this area.  One line was situated right along Interstate 90 and was moving straight eastward at 40 to 50 mph during Friday evening.  This line was producing 60 to 80 mph winds along the I 90 corridor from about 815 pm to 920 pm west of Sioux Falls, causing damage in some locations.  Just west of Sioux Falls beginning in western Minnehaha county, the storms began to rapidly weaken, producing wind speeds of 30 to 40 mph on average.  Then by about 1030 pm, the  line of storms very rapidly reintensified east of Sioux Falls along I 90 in southwest Minnesota in central and eastern Rock county.  With the damage reported, some of these winds along I 90 corridor in southwest Minnesota likely exceeded 80 mph.  

Here are some selected wind reports from the evening of July 23rd, 2010 highlighting this phenomenon.  Notice how strong winds occurred as far east as the Salem SD exit on I 90 - then stopped.  The strong winds then picked up again in Rock county, continuing eastward through southwest Minnesota.  

Time        Report                                Location

826 pm    60 mph wind                             5 NNE Stickney, Aurora county

845 pm    Power lines and trees down              Mitchell, Davison county

845 pm    70 mph wind                             6 NNW Ethan, Davison county

845 pm    House on HWY 37 lost part of roof       3 S Mitchell, Davison county

848 pm    70 mph wind                             4 S Mitchell, Davison county

855 pm    70 mph wind                             Fulton, Hanson county

910 pm    70 mph wind, billboards down            4 S Spencer, McCook county

920 pm    63 mph wind                             4 S Salem, McCook county

1025pm    House and barn down, trees down         7 NNW Luverne, Rock county

1030pm    Barn down killing cattle                2 N Hardwick, Rock county

1045pm    60 mph wind                             1 SW Adrian, Nobles county

1048pm    67 mph wind                             Adrian, Nobles county

1050pm    Large trees down                        Adrian, Nobles county

1050pm    Storage shed collapsed                  Adrian, Nobles county

1054pm    71 mph wind                             2 N Rushmore, Nobles county

1055pm    Roof blown off barn                     2 S Rushmore, Nobles county

1105pm    Semi blown off I 90                     Worthington, Nobles county

1105pm    Numerous trees down                     Worthington, Nobles county

1110pm    60 mph wind                             Round Lake, Nobles county

1125pm    60 mph wind, branches down              Heron Lake, Jackson county

A more detailed listing of severe weather reports and map are also available below.

Note:  Not all severe weather reports are plotted above.  A complete summary follows:

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1210 PM CDT SAT JUL 24 2010

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

0704 PM     HAIL             3 S CHAMBERLAIN         43.76N 99.32W
07/23/2010  E1.00 INCH       BRULE              SD   LAW ENFORCEMENT

0706 PM     TSTM WND GST     CHAMBERLAIN             43.81N 99.32W
07/23/2010  E80.00 MPH       BRULE              SD   TRAINED SPOTTER

0716 PM     HAIL             4 SSE CHAMBERLAIN       43.76N 99.29W
07/23/2010  E1.75 INCH       BRULE              SD   TRAINED SPOTTER

0744 PM     FUNNEL CLOUD     4 NNE BURKE             43.24N 99.28W
07/23/2010                   GREGORY            SD   STORM CHASER

            WELL DEFINED FUNNEL VERY LOW TO THE GROUND

0752 PM     TORNADO          9 NNE PLATTE            43.52N 98.80W
07/23/2010                   BRULE              SD   TRAINED SPOTTER

            BRIEF TOUCHDOWN

0753 PM     TSTM WND GST     7 N PLATTE              43.49N 98.84W
07/23/2010  E65.00 MPH       CHARLES MIX        SD   TRAINED SPOTTER

            VERY HEAVY RAIN AND SMALL HAIL.

0755 PM     TORNADO          8 NNW BONESTEEL         43.18N 99.01W
07/23/2010                   GREGORY            SD   LAW ENFORCEMENT

            ROPE TORNADO GOING UP AND DOWN

0758 PM     TORNADO          5 ENE HERRICK           43.15N 99.10W
07/23/2010                   GREGORY            SD   TRAINED SPOTTER

0823 PM     HAIL             S PLANKINTON            43.71N 98.49W
07/23/2010  E0.75 INCH       AURORA             SD   TRAINED SPOTTER

0826 PM     HAIL             5 NNE STICKNEY          43.66N 98.40W
07/23/2010  E1.75 INCH       AURORA             SD   TRAINED SPOTTER

0826 PM     TSTM WND GST     5 NNE STICKNEY          43.66N 98.40W
07/23/2010  E60.00 MPH       AURORA             SD   TRAINED SPOTTER

0845 PM     TSTM WND DMG     MITCHELL                43.73N 98.03W
07/23/2010                   DAVISON            SD   BROADCAST MEDIA

            POWER LINES AND TREES DOWN

0845 PM     TSTM WND DMG     3 S MITCHELL            43.69N 98.03W
07/23/2010                   DAVISON            SD   TRAINED SPOTTER

            HOUSE ON HWY 37 LOST PART OF THE ROOF

0845 PM     TSTM WND GST     6 NNW ETHAN             43.63N 98.01W
07/23/2010  E70.00 MPH       DAVISON            SD   TRAINED SPOTTER

0848 PM     TSTM WND GST     4 S MITCHELL            43.67N 98.03W
07/23/2010  E70.00 MPH       DAVISON            SD   TRAINED SPOTTER

0855 PM     TSTM WND GST     FULTON                  43.73N 97.82W
07/23/2010  E70.00 MPH       HANSON             SD   TRAINED SPOTTER

0907 PM     TSTM WND DMG     6 N HOWARD              44.10N 97.51W
07/23/2010                   MINER              SD   LAW ENFORCEMENT

            HOUSE MOVED OFF FOUNDATION

0910 PM     TSTM WND GST     4 S SPENCER             43.66N 97.59W
07/23/2010  M70.00 MPH       MCCOOK             SD   TRAINED SPOTTER

            BILLBOARDS BLOWN OVER

0920 PM     TSTM WND GST     4 S SALEM               43.66N 97.39W
07/23/2010  M63.00 MPH       MCCOOK             SD   TRAINED SPOTTER

0927 PM     TSTM WND GST     RAMONA                  44.12N 97.21W
07/23/2010  E60.00 MPH       LAKE               SD   EMERGENCY MNGR

0930 PM     HAIL             W ARLINGTON             44.36N 97.13W
07/23/2010  E1.00 INCH       KINGSBURY          SD   CO-OP OBSERVER

0933 PM     TSTM WND GST     7 W MADISON             44.01N 97.25W
07/23/2010  E60.00 MPH       LAKE               SD   TRAINED SPOTTER

            BRANCHES DOWN

0939 PM     HAIL             1 SSE TYNDALL           42.98N 97.86W
07/23/2010  E1.00 INCH       BON HOMME          SD   TRAINED SPOTTER

0946 PM     TSTM WND DMG     WENTWORTH               44.00N 96.96W
07/23/2010                   LAKE               SD   EMERGENCY MNGR

            LARGE TREE DOWN

0955 PM     TSTM WND GST     1 WSW BROOKINGS         44.30N 96.81W
07/23/2010  M61.00 MPH       BROOKINGS          SD   ASOS

0955 PM     TSTM WND GST     BROOKINGS               44.31N 96.79W
07/23/2010  E60.00 MPH       BROOKINGS          SD   TRAINED SPOTTER

            POWER LINES AND TREES DOWN

0957 PM     TSTM WND DMG     BROOKINGS               44.31N 96.79W
07/23/2010                   BROOKINGS          SD   TRAINED SPOTTER

            SOME TREES DOWN

1000 PM     TSTM WND GST     BROOKINGS               44.31N 96.79W
07/23/2010  E60.00 MPH       BROOKINGS          SD   TRAINED SPOTTER

1004 PM     TSTM WND GST     FLANDREAU               44.05N 96.60W
07/23/2010  E60.00 MPH       MOODY              SD   TRAINED SPOTTER

1015 PM     FLASH FLOOD      BROOKINGS               44.31N 96.79W
07/23/2010                   BROOKINGS          SD   TRAINED SPOTTER

            SOME BUSINESSES ON 6TH STREET HAVE WATER DAMAGE

1025 PM     TSTM WND DMG     7 NNW LUVERNE           43.75N 96.26W
07/23/2010                   ROCK               MN   EMERGENCY MNGR

            HOUSE AND BARN DOWN, TREES DOWN.

1030 PM     TSTM WND DMG     2 N HARDWICK            43.80N 96.20W
07/23/2010                   ROCK               MN   EMERGENCY MNGR

            BARN DOWN KILLING CATTLE.

1033 PM     TSTM WND GST     1 SW PIPESTONE          43.99N 96.33W
07/23/2010  M59.00 MPH       PIPESTONE          MN   AWOS

1035 PM     TSTM WND DMG     PIPESTONE               44.00N 96.31W
07/23/2010                   PIPESTONE          MN   NEWSPAPER

            NUMEROUS LARGE TREES DOWN

1045 PM     TSTM WND GST     1 SW ADRIAN             43.62N 95.95W
07/23/2010  E60.00 MPH       NOBLES             MN   TRAINED SPOTTER

            VERY HEAVY RAIN ACCOMPANIED THE WIND.

1048 PM     TSTM WND GST     ADRIAN                  43.63N 95.93W
07/23/2010  M67.00 MPH       NOBLES             MN   EMERGENCY MNGR

            WIND GUSTS KNOCKED DOWN 2 TO 3 INCH DIAMETER TREE
            BRANCHES. HEAVY RAIN AND PEA TO DIME SIZED HAIL
            ACCOMPANIED THE SEVERE THUNDERSTORM.

1050 PM     TSTM WND DMG     ADRIAN                  43.63N 95.93W
07/23/2010                   NOBLES             MN   EMERGENCY MNGR

            LARGE TREES DOWN

1050 PM     TSTM WND DMG     ADRIAN                  43.63N 95.93W
07/23/2010                   NOBLES             MN   TRAINED SPOTTER

            STORAGE SHED COLLAPSED AND NUMEROUS BRANCHES DOWN

1054 PM     TSTM WND GST     2 N RUSHMORE            43.65N 95.80W
07/23/2010  M71.00 MPH       NOBLES             MN   MESONET

1055 PM     TSTM WND DMG     2 S RUSHMORE            43.59N 95.80W
07/23/2010                   NOBLES             MN   LAW ENFORCEMENT

            ROOF BLOWN OFF OF BARN.

1055 PM     TSTM WND GST     SSW CURRIE              44.07N 95.67W
07/23/2010  E60.00 MPH       MURRAY             MN   TRAINED SPOTTER

1101 PM     TSTM WND GST     1 SE DOVRAY             44.05N 95.53W
07/23/2010  M83.00 MPH       MURRAY             MN   DEPT OF HIGHWAYS

1105 PM     TSTM WND DMG     WORTHINGTON             43.63N 95.60W
07/23/2010                   NOBLES             MN   LAW ENFORCEMENT

            SEMI BLOWN OFF OF INTERSTATE. NUMEROUS TREES DOWN IN
            WORTHINGTON.

1110 PM     TSTM WND GST     W ROUND LAKE            43.54N 95.47W
07/23/2010  E60.00 MPH       NOBLES             MN   TRAINED SPOTTER

1120 PM     TSTM WND GST     4 S JEFFERS             44.00N 95.20W
07/23/2010  E60.00 MPH       COTTONWOOD         MN   EMERGENCY MNGR

            ALTHOUGH THE WIND WAS GUSTING TO AORUND 60 MPH, THERE WAS
            NO DAMAGE AND NO HAIL. RAIN CAME AS A HEAVY DOWNPOUR.

1122 PM     TSTM WND GST     SSW JEFFERS             44.05N 95.20W
07/23/2010  E70.00 MPH       COTTONWOOD         MN   TRAINED SPOTTER

1125 PM     TSTM WND GST     HERON LAKE              43.80N 95.32W
07/23/2010  E60.00 MPH       JACKSON            MN   TRAINED SPOTTER

            TREE LIMBS DOWN AND PATIO FURNITURE MOVED