Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >
Overview
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A fairly localized cluster of thunderstorms developed over northeast Iowa and southwest Wisconsin Monday evening, July 11th 2017. The storms developed rapidly, becoming strong to severe. Large hail and damaging winds accompanied a few of the storms early, but the main threat quickly moved to heavy rainfall and flash flooding. Some of the higher rainfall totals:
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 12 hour rainfall radar estimates, ending 7 am July 12, 2017 |
Flooding
Hydrographs
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| Grant River at Burton, WI | Turkey River at Garber, IA | Mississippi River at Guttenberg, IA |
Radar:
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| Evening radar loop (July 11) | Zoomed view of southwest WI and northeast IA from 8 pm July 11 to 1 am July 12. | Overnight radar loop (July 12) |
Storm Reports
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LA CROSSE WI
726 AM CDT WED JUL 12 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0654 AM HEAVY RAIN 1 NNW FERRYVILLE 43.36N 91.09W
07/12/2017 E4.00 INCH CRAWFORD WI PUBLIC
RELAYED VIA WKBT. THE DURATION OF THE HEAVY
RAIN EVENT WAS 24 HOURS.
0654 AM HEAVY RAIN 1 NNW FERRYVILLE 43.36N 91.09W
07/12/2017 E4.00 INCH CRAWFORD WI PUBLIC
RELAYED VIA WKBT.
0643 AM HEAVY RAIN 1 N LANSING 43.37N 91.22W
07/12/2017 E5.25 INCH ALLAMAKEE IA PUBLIC
RELAYED VIA KCRG.
0643 AM HEAVY RAIN LANSING 43.37N 91.22W
07/12/2017 E5.25 INCH ALLAMAKEE IA PUBLIC
RELAYED VIA KCRG. THE DURATION OF THE HEAVY
RAIN EVENT WAS 24 HOURS.
0505 AM HEAVY RAIN 1 N GUTTENBERG 42.81N 91.10W
07/12/2017 E5.65 INCH CLAYTON IA PUBLIC
RELAYED VIA KWWL. LOCATION ESTIMATED. THE
DURATION OF THE HEAVY RAIN EVENT WAS 24
HOURS.
0505 AM HEAVY RAIN 2 N GUTTENBERG 42.81N 91.10W
07/12/2017 E5.65 INCH CLAYTON IA PUBLIC
RELAYED VIA KWWL. LOCATION ESTIMATED.
0425 AM HEAVY RAIN 3 W SAINT JOSEPH 43.78N 91.10W
07/12/2017 M2.27 INCH LA CROSSE WI MESONET
MESONET STATION C4143, 3 W SAINT JOSEPH.
0400 AM HEAVY RAIN 4 WSW SAINT OLAF 42.91N 91.47W
07/12/2017 M2.20 INCH CLAYTON IA MESONET
MESONET STATION BSHI4, ELKADER 5NW.
0345 AM HEAVY RAIN LITTLEPORT 42.75N 91.37W
07/12/2017 M2.22 INCH CLAYTON IA MESONET
MESONET STATION VLPI4, LITTLEPORT.
0315 AM HEAVY RAIN GARBER 42.74N 91.26W
07/12/2017 M5.39 INCH CLAYTON IA MESONET
MESONET STATION GRBI4, GARBER.
0250 AM FLASH FLOOD CASSVILLE 42.72N 90.99W
07/12/2017 GRANT WI LAW ENFORCEMENT
ROCK SLIDE ALONG COUNTY ROAD VV AND ROAD
WASHOUT NEAR CASSVILLE.
0239 AM FLASH FLOOD GARBER 42.74N 91.26W
07/12/2017 CLAYTON IA LAW ENFORCEMENT
MANY ROADS WASHED OUT IN SOUTHEAST PART OF
COUNTY.
0235 AM HEAVY RAIN 4 W NORTH BUENA VISTA 42.69N 91.04W
07/12/2017 M8.25 INCH CLAYTON IA PUBLIC
RELAYED VIA LAW ENFORCEMENT.
0106 AM HEAVY RAIN 1 N OSTERDOCK 42.74N 91.16W
07/12/2017 E8.20 INCH CLAYTON IA PUBLIC
REPORT RELAYED VIA BROADCAST MEDIA.
0103 AM HEAVY RAIN GUTTENBERG 42.79N 91.10W
07/12/2017 M5.48 INCH CLAYTON IA PUBLIC
RAINFALL THROUGH 1 AM. REPORT RELAYED VIA
BROADCAST MEDIA.
1246 AM HEAVY RAIN 1 N ELKADER 42.87N 91.40W
07/12/2017 M3.36 INCH CLAYTON IA BROADCAST MEDIA
3.36 INCHES REPORTED AT THE ELKADER CENTRAL
COMMUNITY SCHOOLS.
1200 AM HAIL NORTH BUENA VISTA 42.68N 90.96W
07/12/2017 E1.00 INCH CLAYTON IA LAW ENFORCEMENT
1126 PM FLASH FLOOD 4 SSE OSTERDOCK 42.68N 91.12W
07/11/2017 CLAYTON IA LAW ENFORCEMENT
LAW ENFORCEMENT ARE EVACUATING RESIDENTS
ALONG THE LITTLE TURKEY RIVER AND MILL CREEK
SOUTHEAST OF OSTERDOCK, IA.
0953 PM HAIL 1 N GARBER 42.76N 91.26W
07/11/2017 E1.75 INCH CLAYTON IA LAW ENFORCEMENT
0950 PM TSTM WND DMG ELKADER 42.86N 91.40W
07/11/2017 CLAYTON IA LAW ENFORCEMENT
POWER LINES DOWN IN ELKADER.
0950 PM HAIL GARNAVILLO 42.87N 91.24W
07/11/2017 E0.88 INCH CLAYTON IA LAW ENFORCEMENT
0917 PM HAIL ELKADER 42.86N 91.40W
07/11/2017 E0.88 INCH CLAYTON IA LAW ENFORCEMENT
NICKEL HAIL IN ELKADER.
&&
$$
Rain Reports
...24 hour Rainfall Reports as of 7 am July 12... Location Amount Time/Date Lat/Lon ...Iowa... ...Allamakee County... 4 ENE Watson 1.53 in 0645 AM 07/12 43.11N/91.26W 3 S Dorchester 0.56 in 0700 AM 07/12 43.42N/91.51W Postville 0.05 in 0700 AM 07/12 43.09N/91.56W ...Clayton County... 4 W North Buena Vista 8.25 in 0235 AM 07/12 42.69N/91.04W Osterdock 8.20 in 0106 AM 07/12 42.74N/91.16W Guttenberg Dam 10 5.57 in 0600 AM 07/12 42.78N/91.10W Garber 5.39 in 0615 AM 07/12 42.74N/91.26W Littleport 2.22 in 0645 AM 07/12 42.75N/91.37W Elkader 5NW 2.20 in 0700 AM 07/12 42.91N/91.47W Volga 1NE 0.85 in 0600 AM 07/12 42.81N/91.52W Elkader Turkey River 0.81 in 0645 AM 07/12 42.84N/91.40W Marquette-Bloody Run Creek 0.78 in 0700 AM 07/12 43.04N/91.21W Monona WWTP 0.37 in 0700 AM 07/12 43.04N/91.40W ...Fayette County... Fayette 0.03 in 0700 AM 07/12 42.85N/91.82W Eldorado 0.01 in 0645 AM 07/12 43.05N/91.81W Fayette-CWOP 0.01 in 0707 AM 07/12 42.84N/91.80W ...Floyd County... Charles City 0.01 in 0700 AM 07/12 43.06N/92.67W ...Minnesota... ...Fillmore County... Pilot Mound-Root River 0.13 in 0700 AM 07/12 43.78N/92.03W 1 SSE Pilot Mound 0.12 in 0700 AM 07/12 43.79N/92.03W Lanesboro 2NE 0.05 in 0700 AM 07/12 43.73N/91.94W Mabel 0.03 in 0630 AM 07/12 43.52N/91.76W Lanesboro-Root River 0.01 in 0630 AM 07/12 43.72N/91.98W Preston Airport 0.01 in 0659 AM 07/12 43.68N/92.18W ...Houston County... Mound Prairie 0.17 in 0645 AM 07/12 43.78N/91.45W Caledonia 0.11 in 0700 AM 07/12 43.63N/91.50W ...Wabasha County... Kellogg-Zumbro River 1.15 in 0700 AM 07/12 44.32N/92.00W Wabasha 0.66 in 0700 AM 07/12 44.38N/92.05W Bear Valley Alert Rain Gage 0.47 in 0446 AM 07/12 44.36N/92.51W Lake City 0.37 in 0442 AM 07/12 44.45N/92.27W Lake City 0.37 in 0650 AM 07/12 44.44N/92.28W 2 NNW Zumbro Falls 0.33 in 0717 AM 07/12 44.32N/92.44W 1 SSE Kellogg 0.01 in 0715 AM 07/12 44.28N/91.99W Plainview 0.01 in 0724 AM 07/12 44.17N/92.17W ...Winona County... La Crescent Dam 7 0.64 in 0600 AM 07/12 43.87N/91.31W Minnesota City Dam 5 0.60 in 0700 AM 07/12 44.16N/91.81W Winona Dam 5A 0.47 in 0600 AM 07/12 44.09N/91.67W Dakota 0.42 in 0615 AM 07/12 43.91N/91.36W 1 ESE Minnesota City 0.22 in 0700 AM 07/12 44.08N/91.73W Winona Municipal Airport 0.22 in 0652 AM 07/12 44.08N/91.71W Beaver-White Water River 0.17 in 0645 AM 07/12 44.15N/92.00W Elba 0.01 in 0645 AM 07/12 44.09N/92.03W ...Wisconsin... ...Clark County... Neillsville 1W 1.52 in 0700 AM 07/12 44.56N/90.61W ...Crawford County... Ferryville 3.64 in 0700 AM 07/12 43.33N/91.07W Lynxville Dam 9 2.53 in 0600 AM 07/12 43.21N/91.10W Prairie Du Chien 2.31 in 0700 AM 07/12 43.05N/91.13W Steuben 1.68 in 0645 AM 07/12 43.18N/90.86W Prairie Du Chien Airport 1.59 in 0655 AM 07/12 43.02N/91.12W Steuben 4SE 1.49 in 0537 AM 07/12 43.13N/90.84W De Soto 1.20 in 0721 AM 07/12 43.42N/91.19W ...Grant County... Platteville Municipal Airpor 1.13 in 0655 AM 07/12 42.69N/90.44W Boscobel Airport 0.87 in 0653 AM 07/12 43.16N/90.67W 1 ENE Boscobel 0.75 in 0703 AM 07/12 43.15N/90.68W Muscoda 0.55 in 0645 AM 07/12 43.20N/90.44W ...Jackson County... Black River Falls 1.7 NNE 2.09 in 0700 AM 07/12 44.32N/90.83W Black River Falls Area Airpo 1.94 in 0655 AM 07/12 44.25N/90.86W Hatfield Dam 1.75 in 0700 AM 07/12 44.41N/90.73W 1 E Black River Falls 1.20 in 0715 AM 07/12 44.30N/90.83W Mather 3nw 0.96 in 0700 AM 07/12 44.17N/90.35W ...Juneau County... Necedah 1.12 in 0648 AM 07/12 44.03N/90.08W Mauston 1.06 in 0722 AM 07/12 43.80N/90.07W New Lisbon 4ene 0.92 in 0700 AM 07/12 43.91N/90.07W Mauston Airport 0.91 in 0655 AM 07/12 43.84N/90.14W 2 N Cloverdale 0.80 in 0710 AM 07/12 44.06N/90.17W 2 WNW Wisconsin Dells 0.77 in 0730 AM 07/12 43.65N/89.82W Volk Field 0.55 in 0658 AM 07/12 43.94N/90.25W ...La Crosse County... 3 W Saint Joseph 2.75 in 0715 AM 07/12 43.78N/91.10W La Crosse Weather Office 1.74 in 0600 AM 07/12 43.82N/91.19W La Crosse Regional Airport 0.82 in 0653 AM 07/12 43.88N/91.26W ...Monroe County... Four Corners 2.84 in 0700 AM 07/12 44.09N/90.91W Cashton 3NNW 2.60 in 0709 AM 07/12 43.79N/90.80W Tomah 5NNW 2.25 in 0700 AM 07/12 2 E Cataract 2.18 in 0728 AM 07/12 44.09N/90.79W Warrens 4WSW 1.13 in 0700 AM 07/12 44.10N/90.59W ...Taylor County... Jump River 1 NW 1.37 in 0610 AM 07/12 45.36N/90.80W Chelsea 0.87 in 0719 AM 07/12 45.30N/90.30W Medford Airport 0.48 in 0655 AM 07/12 45.10N/90.30W 3 NE Lublin 0.44 in 0714 AM 07/12 45.11N/90.69W ...Trempealeau County... 1 NW Trempealeau 0.86 in 0700 AM 07/12 44.03N/91.46W 1 NE Galesville 0.78 in 0600 AM 07/12 44.10N/91.34W Trempealeau Dam 6 0.67 in 0600 AM 07/12 44.00N/91.44W ...Vernon County... Coon Valley 1.73 in 0600 AM 07/12 43.70N/91.01W Ontario 1.50 in 0700 AM 07/12 43.72N/90.59W Viroqua 1.42 in 0700 AM 07/12 43.56N/90.88W Viroqua Municipal Airport 1.23 in 0655 AM 07/12 43.58N/90.90W Hillsboro 2sw 1.07 in 0700 AM 07/12 43.63N/90.38W Hillsboro WSW 1.05 in 0700 AM 07/12 43.65N/90.35W Readstown 1.01 in 0700 AM 07/12 43.45N/90.76W Stoddard 0.90 in 0700 AM 07/12 43.66N/91.22W Genoa Dam 8 0.62 in 0600 AM 07/12 43.57N/91.23W 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. $$
Photos & Video:
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| This "pond" flooded my yard and garage after the creek went over the banks in Blair, WI (Bobby Bishop) | County G at LaCrosse and Vernon county line (Heather L Euler) |
Flooding along County P in Vernon County (Heather L. Euler) | Flooding in Hegg, WI in Trempealeau County (Daryl Tjerstad) |
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| Flooding in Hegg, WI in Trempealeau County (Daryl Tjerstad) | Below Middle Ridge (Heather L Euler) | This is normally a small stream in Monroe County (Jeannie Jones) | Flooding in Norwalk, WI (Carsen Culpitt) |
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| Flooding in Norwalk, WI (Carsen Culpitt) | Wind damage in Ontario, WI (Candie Dunwald) | A tree came off the rock and covered the road in Pier County Park at Rockbridge WI. (Amanda Ruskamp) | South side of Tomah, WI at approximately 5:45 a.m. on July 12th (Kathy J Mitchell) |
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| Wind damage in Tomah WI (Tonya Noggle) |
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