A prolonged period of moderate to heavy snow affects the region tonight through early Sunday morning, resulting in hazardous road conditions. Portions of northeast Iowa into southwest Wisconsin could see snowfall amounts of 12+". Colder air arrives for Sunday through Tuesday with overnight wind chills in the single digits to teens below zero. Read More >
Overview
| Beginning during the pre-sunrise hours on August 10th, storms formed over southeast Minnesota and produced large hail. These moved east into western and central Wisconsin during the morning producing winds to 60 mph. Later in the morning, storms formed over northeast Iowa and produced large hail near Lourdes, Iowa. As the storms moved into southwest Wisconsin, they intensified and produced winds in the 60-70 mph range and a brief tornado. |  |
Tornadoes:
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Tornado - Burton, Wisconsin
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The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:
| EF0 Weak 65-85 mph |
EF1 Moderate 86-110 mph |
EF2 Significant 111-135 mph |
EF3 Severe 136-165 mph |
EF4 Extreme 166-200 mph |
EF5 Catastrophic 200+ mph |
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Photos & Video:
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| Tornado Damage near Burton, WI (Photo courtesy of Grant Co. EM) |
Tornado Damage near Burton, WI (Photo courtesy of Grant Co. EM) |
Wind Damage in Platteville, WI (Photo Courtesy of Angela Dusseau Gillen) |
Wind Damage in Platteville, WI (Photo courtesy of Angela Denise Jones) |
Radar:
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| Radar Loop: Sunrise Thunderstorms August 10, 2020 |
Radar Loop: Late Morning to Afternoon August 10, 2020 |
Storm Reports
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LA CROSSE WI
235 PM CDT MON AUG 10 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0527 AM HAIL 1 WNW MANTORVILLE 44.07N 92.77W
08/10/2020 M1.00 INCH DODGE MN PUBLIC
0609 AM HAIL 1 W STOCKTON 44.03N 91.79W
08/10/2020 E0.25 INCH WINONA MN PUBLIC
0622 AM HAIL 1 W WILSON 43.95N 91.72W
08/10/2020 E0.75 INCH WINONA MN TRAINED SPOTTER
0625 AM HAIL 3 ESE STOCKTON 44.01N 91.71W
08/10/2020 E0.50 INCH WINONA MN PUBLIC
WIND GUSTS TO 30 MPH AS WELL.
0630 AM HAIL RIDGEWAY 43.92N 91.57W
08/10/2020 M2.00 INCH WINONA MN PUBLIC
RECEIVED VIA SOCIAL MEDIA WITH PICTURE. TIME
ESTIMATED FROM RADAR.
0633 AM TSTM WND GST ETTRICK 44.17N 91.27W
08/10/2020 E45 MPH TREMPEALEAU WI TRAINED SPOTTER
TRAINED SPOTTER REPORTED 45 MPH WIND GUST
AND PEA SIZE HAIL.
0641 AM HAIL NODINE 43.91N 91.44W
08/10/2020 E1.00 INCH WINONA MN PUBLIC
DIME TO QUARTER SIZED HAIL.
0646 AM TSTM WND GST 2 NNE FRENCH ISLAND 43.88N 91.25W
08/10/2020 M30 MPH LA CROSSE WI ASOS
ASOS STATION KLSE LA CROSSE REGIONAL
AIRPORT.
0650 AM HAIL 2 NE MOUND PRAIRIE 43.80N 91.43W
08/10/2020 M0.25 INCH HOUSTON MN CO-OP OBSERVER
COOPERATIVE OBSERVER REPORTED 3/8 DIAMETER
HAIL.
0653 AM TSTM WND GST 3 ENE CATARACT 44.09N 90.79W
08/10/2020 M33 MPH MONROE WI MESONET
MESONET STATION AR731 2 E CATARACT.
0700 AM HEAVY RAIN 1 W PLATTEVILLE 42.74N 90.49W
08/10/2020 E1.35 INCH GRANT WI TRAINED SPOTTER
0700 AM HAIL TUNNEL CITY 44.00N 90.57W
08/10/2020 M0.50 INCH MONROE WI TRAINED SPOTTER
0700 AM TSTM WND GST BLACK RIVER FALLS 44.30N 90.85W
08/10/2020 M58 MPH JACKSON WI ASOS
0734 AM TSTM WND GST CAMP DOUGLAS 43.92N 90.27W
08/10/2020 M49 MPH JUNEAU WI AWOS
AWOS STATION KVOK VOLK FIELD.
0748 AM TSTM WND DMG 5 SW NEW ROME 44.19N 89.96W
08/10/2020 JUNEAU WI LAW ENFORCEMENT
LAW ENFORCEMENT REPORTED A TREE DOWN IN
ARMENIA TOWNSHIP.
0803 AM TSTM WND DMG 2 N FRIENDSHIP 44.00N 89.83W
08/10/2020 ADAMS WI LAW ENFORCEMENT
LAW ENFORCEMENT REPORTED A TREE DOWN NEAR
13TH DRIVE AND CYPRESS DRIVE.
1135 AM HEAVY RAIN 1 WNW MANTORVILLE 44.07N 92.77W
08/10/2020 M0.14 INCH DODGE MN PUBLIC
1221 PM TSTM WND GST 2 SSE GLEN HAVEN 42.81N 91.06W
08/10/2020 E50 MPH GRANT WI FIRE DEPT/RESCUE
.
1224 PM HAIL 2 SSE GLEN HAVEN 42.81N 91.06W
08/10/2020 E0.25 INCH GRANT WI FIRE DEPT/RESCUE
.
1228 PM HAIL PATCH GROVE 42.94N 90.97W
08/10/2020 E0.70 INCH GRANT WI FIRE DEPT/RESCUE
1230 PM TSTM WND GST PATCH GROVE 42.94N 90.97W
08/10/2020 M63 MPH GRANT WI FIRE DEPT/RESCUE
.
1243 PM HEAVY RAIN PRAIRIE DU CHIEN 43.04N 91.14W
08/10/2020 E1.25 INCH CRAWFORD WI PUBLIC
1249 PM TSTM WND GST BLOOMINGTON 42.88N 90.93W
08/10/2020 E60 MPH GRANT WI FIRE DEPT/RESCUE
.
1250 PM TSTM WND GST LANCASTER 42.85N 90.71W
08/10/2020 E60 MPH GRANT WI FIRE DEPT/RESCUE
.
0105 PM TSTM WND DMG 2 S BURTON 42.69N 90.82W
08/10/2020 GRANT WI PUBLIC
STORM SPOTTER REPORTED A FUNNEL WITH CORN
LEAVES/STOCKS AND STEEL SIDING DEBRIS.
0110 PM TSTM WND DMG 5 NNW PLATTEVILLE 42.80N 90.51W
08/10/2020 GRANT WI TRAINED SPOTTER
TREE DAMAGE AND WIND GUSTS OF 62 MPH.
0111 PM TSTM WND DMG LANCASTER 42.85N 90.71W
08/10/2020 GRANT WI EMERGENCY MNGR
POWER OUTAGES IN LANCASTER/FENNIMORE AREAS.
0113 PM TSTM WND DMG POTOSI 42.69N 90.71W
08/10/2020 GRANT WI EMERGENCY MNGR
POWER LINES AND TREES DOWN.
0114 PM TSTM WND DMG PLATTEVILLE 42.74N 90.48W
08/10/2020 GRANT WI PUBLIC
TREE FELL ON HOUSE.
0115 PM TSTM WND DMG PLATTEVILLE 42.73N 90.48W
08/10/2020 GRANT WI PUBLIC
4 ROADS BLOCKED OFF IN THE TOWN AND 8-10
INCH TREES AND TREE LIMBS DOWN.
0120 PM TSTM WND DMG 1 W PLATTEVILLE 42.74N 90.49W
08/10/2020 GRANT WI TRAINED SPOTTER
TREE DAMAGE AND POWER OUTAGES.
0147 PM HEAVY RAIN 1 W PLATTEVILLE 42.74N 90.49W
08/10/2020 E2.50 INCH GRANT WI TRAINED SPOTTER
Rain Reports
...24-hour Rainfall Reports... Location Amount Time/Date Lat/Lon ...Iowa... ...Allamakee County... Harpers Ferry 6.4 SSW 0.54 in 0700 AM 08/11 43.11N/91.20W Postville 5.5 NE 0.30 in 0700 AM 08/11 43.14N/91.49W 5 SW Waukon Jct 0.06 in 0715 AM 08/11 43.11N/91.27W Waukon 3N 0.05 in 0600 AM 08/11 43.31N/91.46W 3 S Dorchester 0.04 in 0615 AM 08/11 43.42N/91.51W ...Chickasaw County... Ionia 2W 0.43 in 0700 AM 08/11 43.03N/92.50W 5 NE New Hampton 0.16 in 0830 AM 08/11 43.13N/92.26W New Hampton 0.15 in 0700 AM 08/11 43.06N/92.32W New Hampton 0.4 SW 0.12 in 0700 AM 08/11 43.06N/92.32W ...Clayton County... Mcgregor 0.80 in 0839 AM 08/11 43.02N/91.19W Guttenberg Dam 10 0.58 in 0600 AM 08/11 42.79N/91.10W Garber 0.54 in 0815 AM 08/11 42.74N/91.26W Monona 0.49 in 0839 AM 08/11 43.04N/91.39W Littleport 0.32 in 0700 AM 08/11 42.75N/91.37W Elkader 6SSW 0.19 in 0700 AM 08/11 42.78N/91.45W ...Fayette County... Fayette 0.40 in 0700 AM 08/11 42.88N/91.83W Waucoma 1 WNW 0.20 in 0700 AM 08/11 43.06N/92.05W ...Floyd County... 2 NE Dougherty 0.58 in 0835 AM 08/11 42.95N/93.01W Charles City 0.25 in 0700 AM 08/11 43.06N/92.67W ...Howard County... 3 E Elma 0.39 in 0835 AM 08/11 43.25N/92.38W Saratoga 0.03 in 0830 AM 08/11 43.35N/92.42W Riceville 0.01 in 0830 AM 08/11 43.36N/92.48W ...Mitchell County... Osage 4.7 E 0.08 in 0700 AM 08/11 43.28N/92.72W St Ansgar 0.06 in 0630 AM 08/11 43.38N/92.92W ...Winneshiek County... Spillville 0.40 in 0830 AM 08/11 43.21N/91.95W Fort Atkinson 2.6 W 0.26 in 0700 AM 08/11 43.15N/91.98W Decorah 4.9SE 0.21 in 0700 AM 08/11 43.26N/91.70W 7 ENE Decorah 0.10 in 0800 AM 08/11 43.34N/91.64W 1 ENE Jackson Junction 0.04 in 0840 AM 08/11 43.11N/92.04W ...Minnesota... ...Dodge County... Claremont 2.5 ESE 0.09 in 0800 AM 08/11 44.04N/92.95W 2 WNW Byron 0.02 in 0835 AM 08/11 44.05N/92.69W Hayfield 0.01 in 0837 AM 08/11 43.89N/92.85W Hayfield 0.3 SSE 0.01 in 0800 AM 08/11 43.89N/92.85W Hayfield 0.6 WNW 0.01 in 0700 AM 08/11 43.89N/92.86W ...Fillmore County... Mabel 0.02 in 0630 AM 08/11 43.52N/91.76W Wykoff 3.1 NW 0.01 in 0700 AM 08/11 43.74N/92.31W ...Houston County... 1 NNE Houston 0.18 in 0645 AM 08/11 43.77N/91.57W 1 SSE Brownsville 0.01 in 0745 AM 08/11 43.69N/91.27W La Crescent 1.0 WSW 0.01 in 0700 AM 08/11 43.83N/91.32W ...Mower County... Austin 1.9 ENE 0.04 in 0800 AM 08/11 43.68N/92.94W Austin 1.5 WSW 0.02 in 0700 AM 08/11 43.67N/93.00W ...Olmsted County... Rochester 0.11 in 0839 AM 08/11 44.04N/92.44W Rochester 0.03 in 0836 AM 08/11 44.08N/92.52W 2 NE Rochester 0.03 in 0600 AM 08/11 44.04N/92.44W Rochester 0.02 in 0835 AM 08/11 44.09N/92.51W 1 W Oronoco 0.02 in 0745 AM 08/11 44.17N/92.55W 6 NNW Genoa 0.01 in 0730 AM 08/11 44.19N/92.65W ...Wabasha County... Lake City 0.01 in 0839 AM 08/11 44.32N/92.44W ...Winona County... Stockton 0.4 E 0.50 in 0600 AM 08/11 44.03N/91.76W 4.2 N Rollingstone 0.20 in 0600 AM 08/11 44.16N/91.81W Whitewater State Park 0.01 in 0700 AM 08/11 44.05N/92.05W Stockton 1.2 W 0.01 in 0700 AM 08/11 44.03N/91.79W 1 WSW Elba 0.01 in 0615 AM 08/11 44.09N/92.03W ...Wisconsin... ...Adams County... 0.6 W Friendship 0.26 in 0700 AM 08/11 43.98N/89.83W Friendship 6.4 NNE 0.20 in 0700 AM 08/11 44.06N/89.79W Grand Marsh 1.0 W 0.06 in 0700 AM 08/11 43.89N/89.73W Oxford 4.0 W 0.03 in 0653 AM 08/11 43.79N/89.64W ...Buffalo County... Mondovi 12.1 SSE 0.14 in 0700 AM 08/11 44.40N/91.60W Alma Dam 4 0.12 in 0600 AM 08/11 44.33N/91.92W ...Crawford County... 0.6 NE Prairie Du Chien 0.55 in 0700 AM 08/11 43.05N/91.13W Prairie Du Chien Airport 0.21 in 0835 AM 08/11 43.02N/91.12W Steuben 4SE 0.18 in 0630 AM 08/11 43.13N/90.84W 2.8 E Harpers Ferry 0.12 in 0745 AM 08/11 43.21N/91.10W Gays Mills 6.1 SE 0.12 in 0700 AM 08/11 43.26N/90.76W Gays Mills 1.0 NE 0.12 in 0700 AM 08/11 43.33N/90.84W 1 S De Soto 0.11 in 0801 AM 08/11 43.41N/91.19W De Soto 0.07 in 0836 AM 08/11 43.42N/91.19W ...Grant County... Cassville 7.8 ENE 1.49 in 0700 AM 08/11 42.75N/90.84W Platteville 1.34 in 0830 AM 08/11 42.74N/90.46W Lancaster 1.00 in 0741 AM 08/11 42.83N/90.69W Muscoda 0.20 in 0835 AM 08/11 43.19N/90.46W Fennimore 0.19 in 0839 AM 08/11 42.98N/90.66W Muscoda 0.5 WSW 0.19 in 0815 AM 08/11 43.18N/90.44W Boscobel 0.16 in 0703 AM 08/11 43.15N/90.68W Boscobel Airport 0.14 in 0824 AM 08/11 43.15N/90.68W ...Jackson County... Black River Falls 1.7 NNE 0.55 in 0700 AM 08/11 44.32N/90.83W Mather 3NW 0.42 in 0700 AM 08/11 44.17N/90.35W ...Juneau County... Necedah 0.45 in 0648 AM 08/11 44.03N/90.08W 1.0 E Mauston 0.06 in 0800 AM 08/11 43.79N/90.06W 1 W Lyndon Station 0.05 in 0835 AM 08/11 43.71N/89.93W 3 SW Lemonweir 0.05 in 0835 AM 08/11 43.74N/90.05W Mauston Airport 0.01 in 0835 AM 08/11 43.83N/90.13W New Lisbon 0.01 in 0816 AM 08/11 43.87N/90.17W ...La Crosse County... Coon Valley 4.5 NNW 0.02 in 0700 AM 08/11 43.76N/91.06W ...Monroe County... Warrens 4.7 WSW 0.25 in 0700 AM 08/11 44.10N/90.59W Cashton 3 NNW 0.10 in 0734 AM 08/11 43.79N/90.80W Wilton 4.2 E 0.05 in 0700 AM 08/11 43.81N/90.44W ...Richland County... 1 SSE Richland Center 0.18 in 0839 AM 08/11 43.32N/90.38W ...Taylor County... Medford 0.01 in 0830 AM 08/11 45.30N/90.30W ...Trempealeau County... Ettrick 3.2 NE 0.95 in 0730 AM 08/11 44.20N/91.23W Galesville 4.7 E 0.04 in 0623 AM 08/11 44.08N/91.26W Trempealeau Dam 6 0.02 in 0600 AM 08/11 44.00N/91.44W 1 NW Trempealeau 0.01 in 0630 AM 08/11 44.03N/91.46W ...Vernon County... La Farge 0.13 in 0831 AM 08/11 43.60N/90.63W Hillsboro 2 SW 0.09 in 0700 AM 08/11 43.63N/90.38W Hillsboro 0.5 WSW 0.08 in 0700 AM 08/11 43.65N/90.35W 0.5 E Viroqua 0.08 in 0700 AM 08/11 43.56N/90.88W Genoa Dam 8 0.06 in 0815 AM 08/11 43.57N/91.23W Viroqua Municipal Airport 0.05 in 0835 AM 08/11 43.58N/90.90W Stoddard 4.7 NNE 0.04 in 0700 AM 08/11 43.72N/91.17W Viroqua 0.8 ESE 0.03 in 0700 AM 08/11 43.55N/90.87W Observations are collected from a variety of sources with varying equipment and exposures. We thank all volunteer weather observers for their dedication. Not all data listed are considered official.
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