Preliminary Severe Weather Summary for July 1, 2011

During the early evening of July 1 around 7 pm, a line of showers and thunderstorms formed over south central Minnesota and north central Iowa.  These storms were initially on a cold front.  However, the storms over south central Minnesota began racing east ahead of the front, into the hot and humid airmass that was over the Upper Mississippi River Valley region.  The result of this was numerous reports of severe wind gusts as well as wind damage across much of southeast Minnesota into southwest into central Wisconsin. A few reports of wind damage were also received in northeast Iowa.  What was most interesting about this severe weather event was that even though the storms were weakening as they tracked east through the region, they still produced plenty of severe weather.  The cause of the weakening was a combination of temperatures cooling through the evening and the environment turning less favorable for storms to organize over Wisconsin.  Nevertheless, severe wind gusts and wind damage occurred into areas as far east as Sparta, Tomah, Necedah and Big Flats in the Upper Mississippi River Valley region.

The following is a summary of reports received into the National Weather Service in La Crosse as of 1238 am July 2nd:

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

0847 PM     TSTM WND GST     HAYFIELD                43.89N 92.85W
07/01/2011  E50.00 MPH       DODGE              MN   FIRE DEPT/RESCUE

0902 PM     TSTM WND GST     HAYFIELD                43.89N 92.85W
07/01/2011  E60.00 MPH       DODGE              MN   AMATEUR RADIO

0909 PM     TSTM WND GST     5 S ROCHESTER           43.94N 92.48W
07/01/2011  M58.00 MPH       OLMSTED            MN   ASOS

0910 PM     TSTM WND GST     3 SW PLAINVIEW          44.13N 92.21W
07/01/2011  M66.00 MPH       WABASHA            MN   AMATEUR RADIO

0916 PM     TSTM WND GST     ELGIN                   44.13N 92.25W
07/01/2011  M60.00 MPH       WABASHA            MN   AMATEUR RADIO

0930 PM     TSTM WND DMG     AUSTIN                  43.67N 92.97W
07/01/2011                   MOWER              MN   BROADCAST MEDIA

            A COUPLE OF 6-8 INCH IN DIAMETER TREES DOWN ON SOUTHEAST
            SIDE OF TOWN.

0942 PM     TSTM WND DMG     LEWISTON                43.98N 91.87W
07/01/2011                   WINONA             MN   LAW ENFORCEMENT

            TREE BLOWN DOWN

0942 PM     TSTM WND GST     2 W SPRING VALLEY       43.69N 92.43W
07/01/2011  M55.00 MPH       FILLMORE           MN   TRAINED SPOTTER

0945 PM     TSTM WND GST     6 W STEWARTVILLE        43.86N 92.61W
07/01/2011  E50.00 MPH       OLMSTED            MN   PUBLIC

0956 PM     TSTM WND GST     2 SE EYOTA              43.97N 92.20W
07/01/2011  M63.00 MPH       OLMSTED            MN   MESONET

0958 PM     TSTM WND GST     5 W PRESTON             43.67N 92.18W
07/01/2011  M72.00 MPH       FILLMORE           MN   AWOS

1002 PM     TSTM WND DMG     OSSEO                   44.58N 91.22W
07/01/2011                   TREMPEALEAU        WI   LAW ENFORCEMENT

            POWER LINES DOWN

1006 PM     HAIL             4 W OSAGE               43.28N 92.89W
07/01/2011  E0.50 INCH       MITCHELL           IA   LAW ENFORCEMENT

1006 PM     TSTM WND DMG     2 W ST. ANSGAR          43.38N 92.96W
07/01/2011                   MITCHELL           IA   LAW ENFORCEMENT

            LARGE TREE DOWN

1006 PM     TSTM WND DMG     2 S LYLE                43.48N 92.94W
07/01/2011                   MITCHELL           IA   LAW ENFORCEMENT

            LARGE TREE DOWN

1014 PM     TSTM WND GST     GALESVILLE              44.08N 91.36W
07/01/2011  E50.00 MPH       TREMPEALEAU        WI   NWS EMPLOYEE

1015 PM     TSTM WND GST     4 NW HOKAH              43.80N 91.41W
07/01/2011  M61.00 MPH       HOUSTON            MN   CO-OP OBSERVER

1017 PM     TSTM WND DMG     OSAGE                   43.28N 92.81W
07/01/2011                   MITCHELL           IA   LAW ENFORCEMENT

            A FEW TREES BLOWN DOWN

1020 PM     TSTM WND DMG     ALMA CENTER             44.44N 90.91W
07/01/2011                   JACKSON            WI   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN.

1022 PM     TSTM WND DMG     DAKOTA                  43.91N 91.36W
07/01/2011                   WINONA             MN   LAW ENFORCEMENT

            TREE BLOWN DOWN

1022 PM     TSTM WND DMG     HOKAH                   43.76N 91.35W
07/01/2011                   HOUSTON            MN   EMERGENCY MNGR

            TREES DOWN IN TOWN

1022 PM     TSTM WND GST     GRAND MEADOW            43.71N 92.57W
07/01/2011  E75.00 MPH       MOWER              MN   BROADCAST MEDIA

1027 PM     BLIZZARD         LA CRESCENT             43.83N 91.30W
07/01/2011                   HOUSTON            MN   EMERGENCY MNGR

            TREES AND POWER LINES DOWN.

1030 PM     TSTM WND DMG     LA CROSSE               43.83N 91.23W
07/01/2011                   LA CROSSE          WI   LAW ENFORCEMENT

            TREE DOWN IN COPELAND PARK

1030 PM     TSTM WND DMG     3 N LA CROSSE           43.87N 91.23W
07/01/2011                   LA CROSSE          WI   PUBLIC

            NUMEROUS TREES SNAPPED OFF AND UPROOTED ALONG THE
            SHORELINE OF LAKE ONALASKA. ESTIMATED WIND GUSTS OF 70
            MPH.

1030 PM     TSTM WND DMG     ONALASKA                43.89N 91.22W
07/01/2011                   LA CROSSE          WI   PUBLIC

            A COUPLE OF TREES AND SEVERAL LIMBS DOWN ON THE NORTHWEST
            SIDE OF TOWN.

1031 PM     TSTM WND GST     1 E LA CROSSE           43.83N 91.21W
07/01/2011  E49.00 MPH       LA CROSSE          WI   MESONET

1033 PM     TSTM WND GST     2 S LA CROSSE           43.80N 91.23W
07/01/2011  M56.00 MPH       LA CROSSE          WI   AMATEUR RADIO

            SOME BRANCHES BLOWN OFF TREES.

1033 PM     TSTM WND GST     ONALASKA                43.89N 91.22W
07/01/2011  E60.00 MPH       LA CROSSE          WI   TRAINED SPOTTER

1042 PM     NON-TSTM WND GST 5 NNE STODDARD          43.73N 91.18W
07/01/2011  E50.00 MPH       LA CROSSE          WI   NWS EMPLOYEE

1045 PM     TSTM WND DMG     3 W NEILLSVILLE         44.56N 90.65W
07/01/2011                   CLARK              WI   EMERGENCY MNGR

            TREE BLOWN DOWN ON VEHICLE.

1050 PM     HAIL             NORA SPRINGS            43.14N 93.01W
07/01/2011  E0.50 INCH       FLOYD              IA   LAW ENFORCEMENT

1055 PM     TSTM WND DMG     SPARTA                  43.94N 90.81W
07/01/2011                   MONROE             WI   EMERGENCY MNGR

            NUMEROUS TREE LIMBS DOWN AROUND TOWN AND ALSO SOME ROOF
            DAMAGE TO A FEW BUILDINGS.

1055 PM     TSTM WND GST     2 E LOYAL               44.74N 90.46W
07/01/2011  E55.00 MPH       CLARK              WI   TRAINED SPOTTER

1059 PM     TSTM WND DMG     SPARTA                  43.94N 90.81W
07/01/2011                   MONROE             WI   AMATEUR RADIO

            LARGE TREE BLOWN DOWN AND SOME ROOF DAMAGE TO BUILDING ON
            WATER STREET.

1136 PM     LIGHTNING        WINONA                  44.05N 91.66W
07/01/2011                   WINONA             MN   LAW ENFORCEMENT

            HOUSE STRUCK BY LIGHTNING

1140 PM     TSTM WND DMG     FINLEY                  44.22N 90.13W
07/01/2011                   JUNEAU             WI   BROADCAST MEDIA

            TREES DOWN ALONG HWY 80 AND COUNTY ROAD F

1142 PM     TSTM WND GST     5 E NECEDAH             44.02N 89.97W
07/01/2011  M63.00 MPH       ADAMS              WI   TRAINED SPOTTER

1145 PM     TSTM WND DMG     1 N NECEDAH             44.04N 90.07W
07/01/2011                   JUNEAU             WI   LAW ENFORCEMENT

            SEVERAL TREES DOWN ACROSS HIGHWAY 21 NORTH OF NECEDAH.

1152 PM     TSTM WND GST     BIG FLATS               44.12N 89.80W
07/01/2011  E60.00 MPH       ADAMS              WI   PUBLIC

 



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