Severe Weather of May 30, 2013


Local Storm Reports Rainfall Reports

Southerly winds, in the wake of the warm front that passed through on May 29, continued to bring warm and humid air into the Upper Mississippi River Valley region. During the afternoon hours, a trough of low pressure in the upper levels of the atmosphere lifting out of the central plains triggered what is known as a "bow echo" over eastern Iowa.  

Bow echoes are notorious for producing wind damage. The northern portion of the bow, called the "comma head," is what affected our region, and in particular portions of northeast Iowa and southwest Wisconsin. Numerous reports of trees and power lines down were received, along with a wind gust as high as 70 mph.

Below is the radar loop from the event over the region and how it compares to the evolution of a bow echo on radar.

Radar Loop from May 30, 2013

Radar loop from 4:30 to 7:30 p.m.

Click on image for a larger loop (will take longer to load)

Evolution of a bow echo

Evolution of a bow echo

DB = downburst, or where where the strongest winds occur

Bow echoes which produce severe thunderstorm winds ( >= 58 mph ) for over a 240 mile stretch is considered a "derecho".  This bow echo was not a derecho. The last severe weather event that affected our region that was close to being a derecho was Sept 2, 2011.  Learn more about derechoes and bow echoes from the Storm Prediction Center

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Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LA CROSSE WI
946 PM CDT THU MAY 30 2013

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

0243 PM     TSTM WND GST     1 S LANCASTER           42.83N 90.71W
05/30/2013  M70.00 MPH       GRANT              WI   911 CALL CENTER

            IN THE ORCHARD MANOR AREA

0326 PM     TSTM WND DMG     4 W GOTHAM              43.21N 90.38W
05/30/2013                   RICHLAND           WI   EMERGENCY MNGR

            TREES DOWN NEAR COUNTY LINE

0356 PM     TSTM WND DMG     4 NW BIG FLATS          44.16N 89.86W
05/30/2013                   ADAMS              WI   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN

0416 PM     TSTM WND DMG     ADAMS                   43.96N 89.82W
05/30/2013                   ADAMS              WI   911 CALL CENTER

            TREES AND POWER LINES DOWN

0427 PM     TSTM WND DMG     4 SW GRAND MARSH        43.86N 89.77W
05/30/2013                   ADAMS              WI   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN

0519 PM     TSTM WND GST     EDGEWOOD                42.65N 91.40W
05/30/2013  E50.00 MPH       CLAYTON            IA   FIRE DEPT/RESCUE

            NEARLY ZERO VISIBILITY WITH HEAVY RAIN

0543 PM     TSTM WND GST     LUANA                   43.06N 91.46W
05/30/2013  E55.00 MPH       CLAYTON            IA   LAW ENFORCEMENT

0543 PM     TSTM WND GST     5 SE GARNAVILLO         42.82N 91.17W
05/30/2013  E60.00 MPH       CLAYTON            IA   FIRE DEPT/RESCUE

            ALONG HIGHWAY 52

0550 PM     TSTM WND GST     MCGREGOR                43.02N 91.18W
05/30/2013  E50.00 MPH       CLAYTON            IA   911 CALL CENTER

            ZERO VISIBILITY WITH HEAVY RAIN

0552 PM     TSTM WND GST     GLEN HAVEN              42.83N 91.07W
05/30/2013  E45.00 MPH       GRANT              WI   EMERGENCY MNGR

0559 PM     TSTM WND GST     5 S EASTMAN             43.09N 91.02W
05/30/2013  E60.00 MPH       CRAWFORD           WI   AMATEUR RADIO

0604 PM     TSTM WND GST     LANCASTER               42.85N 90.71W
05/30/2013  E50.00 MPH       GRANT              WI   TRAINED SPOTTER

0620 PM     TSTM WND GST     MOUNT STERLING          43.31N 90.93W
05/30/2013  M30.00 MPH       CRAWFORD           WI   AMATEUR RADIO

            0.56 OF RAIN SO FAR

0620 PM     TSTM WND GST     BOSCOBEL                43.14N 90.70W
05/30/2013  E45.00 MPH       GRANT              WI   AMATEUR RADIO

0625 PM     TSTM WND GST     4 W VIROQUA             43.56N 90.97W
05/30/2013  E65.00 MPH       VERNON             WI   AMATEUR RADIO

            ALONG HIGHWAY 56

0646 PM     TSTM WND DMG     LA CROSSE               43.83N 91.23W
05/30/2013                   LA CROSSE          WI   911 CALL CENTER

            13 INCH DIAMETER TREES DOWN ON FERRY ST BETWEEN 11TH AND
            WEST AVE...AND ON 6TH STREET

 


Rainfall Reports

...RAINFALL TOTALS ACROSS THE AREA AS OF 945 PM MAY 30...

LOCATION                   COUNTY              RAINFALL

...IOWA...
DORCHESTER HWY 76          ALLAMAKEE             0.47
CHARLES CITY               FLOYD                 1.23
BEAVER                     WINONA                0.25
ELKADER                    CLAYTON               1.40
EL DORADO 1E               FAYETTE               0.18
GARBER                     CLAYTON               0.85
ION                        ALLAMAKEE             0.71
YELLOW RIVER PARK          ALLAMAKEE             0.65
LITTLEPORT                 CLAYTON               0.39
MCGREGOR                   CLAYTON               1.24
MARQUETTE                  CLAYTON               0.29
OELWEIN AWOS               FAYETTE               0.19


...MINNESOTA...
AUSTIN 3S                  MOWER                 0.01
BROWNSVILLE                HOUSTON               0.68
BEAVER                     WINONA                0.25
AUSTIN 2NE                 MOWER                 0.14
DAKOTA                     WINONA                0.42
LAKE CITY                  WABASHA               0.05
LANESBORO                  FILLMORE              0.85
MOUND PRAIRIE              HOUSTON               0.78
KELLOGG                    WABASHA               0.19
ROCHESTER BEAR CR          OLMSTED               0.25
ROCHESTER CASCADE CR       OLMSTED               0.28
ROCHESTER SILVER CR        OLMSTED               0.30
ROCHESTER BELTLINE         OLMSTED               0.23
ROCHESTER ASOS             OLMSTED               0.54


...WISCONSIN...
DIAMOND LAKE RAWS          TAYLOR                0.54
LA CROSSE                  LA CROSSE             0.57
NECEDAH RAWS               JUNEAU                1.05
STEUBEN                    CRAWFORD              2.10
ONTARIO                    VERNON                0.36
NEILLSVILLE                CLARK                 0.38
ROCKVILLE                  GRANT                 0.51
BURTON                     GRANT                 0.58
HILLSBORO                  VERNON                0.50
READSTOWN                  VERNON                1.11
LA CROSSE ASOS             LA CROSSE             1.15
BOSCOBEL ASOS              GRANT                 0.86
BOSCOBEL RAWS              GRANT                 0.91
MONDOVI                    BUFFALO               0.84
NECEDAH 5WNW CRN           JUNEAU                0.98
DAHLEN DAM                 VERNON                0.59
KLINKNER DAM               VERNON                0.47
HIDDEN VALLEY DAM          VERNON                0.63
SEAS BRANCH DAM            VERNON                0.60
RUNGE HOLLOW DAM           VERNON                0.44
SIDIE HOLLOW DAM           VERNON                0.75
YTTRI DAM                  VERNON                0.79
THOMPSON DAM               VERNON                0.67


OBSERVATIONS ARE COLLECTED FROM A VARIETY OF SOURCES WITH VARYING
EQUIPMENT AND EXPOSURE. NOT ALL DATA LISTED IS CONSIDERED OFFICIAL.

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