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 4:30 to 7:30 p.m.
Click on image for a larger loop (will take longer to load)
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.
Media use of NWS Web News Stories is encouraged. Please acknowledge the NWS as the source of any news information accessed from this site.
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 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.