Severe Weather of July 18, 2012


Rainfall Totals Photos Local Storm Reports

On Wednesday, July 18th, the boundary between cooler air to the north and a very hot and humid airmass to the south set the stage for severe thunderstorms. Initially an isolated storm developed over southeast Minnesota and produced heavy rain and large hail. Additional storms formed later in the afternoon over northern Iowa and as they combined, storms not only dropped large hail but began to produce damaging wind as they moved east into southern Wisconsin. Wind damage was the main threat from extreme northeast Iowa all the way across southern Wisconsin by Wednesday evening.

Some areas received over 2 inches of rain while others received hardly a drop.

storm reports

National storm reports from July 18th

Local storm reports and storm-based warnings plotted.
(Yellow lines are borders of Severe Thunderstorm Warnings issued)

radar view radar view radar view

Radar view of Hayfield, MN storm at 1:00 p.m. CDT

Radar view of storms at 3:20 p.m. CDT when large hail was falling around Ridgeway, IA.

Radar animation from 1:00-6:30 p.m. July 18th. Courtesy of Iowa Environmental Mesonet (IEM).

radar view radar view

Wind velocity image when damage was hitting Highland, IA area (bright green is stronger winds blowing toward the northeast) at 3:52 p.m. CDT

Wind velocity image at 5:35 p.m. CDT when strong winds were moving across Richland County, WI. (bright red is strongest winds blowing toward the east)

nws logo Media use of NWS Web News Stories is encouraged. Please acknowledge the NWS as the source of any news information accessed from this site.

 


Storm Photos

large hail large hail large hail
large hail large hail large hail
storm clouds storm clouds large hail

Photo submissions courtesy of local photographers and media partners.


Rainfall Totals

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
945 AM CDT THU JUL 19 2012

...24 HOUR RAINFALL TOTALS ACROSS THE AREA...

LOCATION                   RAINFALL    TIME     LAT/LON


IOWA

...ALLAMAKEE COUNTY...
DORCHESTER HIGHWAY 76      2.07        0700 AM  43.42N 91.51W
DORCHESTER                 1.23        0700 AM  43.47N 91.51W
HARPERS FERRY              1.22        0700 AM  43.17N 91.24W
ION                        1.15        0700 AM  43.11N 91.27W
WAUKON 5E                  0.80        
POSTVILLE                  0.71        0700 AM  43.09N 91.56W
LANSING 4SE                0.31        0700 AM  43.32N 91.16W

...CHICKASAW COUNTY...
NEW HAMPTON                0.52        0700 AM  43.06N 92.31W
IONIA                      0.25        0700 AM  43.03N 92.50W

...CLAYTON COUNTY...
MONONA                     1.75        0700 AM  43.04N 91.40W
MARQUETTE                  0.77        0700 AM  43.04N 91.21W
MCGREGOR                   0.29        0700 AM  43.02N 91.17W

...FAYETTE COUNTY...
CLERMONT                   0.64        0700 AM  43.00N 91.66W
ELDORADO                   0.48        0700 AM  43.05N 91.81W
FAYETTE                    0.17        0700 AM  42.85N 91.82W

...FLOYD COUNTY...
NASHUA ISU AG STATION      0.28        0700 AM  42.94N 92.57W
CHARLES CITY CEDAR RVR     0.14        0700 AM  43.06N 92.67W
CHARLES CITY AWOS          0.09        0700 AM  43.07N 92.61W
COLWELL                    0.07        0700 AM  43.16N 92.59W
CHARLES CITY COOP          0.07        0700 AM  43.08N 92.67W

...HOWARD COUNTY...
CRESCO                     2.65        0700 AM  43.37N 92.11W

...MITCHELL COUNTY...
ST ANSGAR                  0.06        0700 AM  43.37N 92.83W
OSAGE                      0.04        0700 AM  43.28N 92.81W

...WINNESHIEK COUNTY...
DECORAH                    1.52        0700 AM  43.30N 91.80W
BLUFFTON                   1.50        0700 AM  43.41N 91.90W
DECORAH AWOS               0.94        0700 AM  43.28N 91.74W
WAUCOMA                    0.62        0700 AM  43.05N 92.04W
CALMAR                     0.62

MINNESOTA

...DODGE COUNTY...
DODGE CENTER AWOS          0.63        0700 AM  44.03N 92.83W
KASSON                     0.50        0700 AM
MANTORVILLE                0.46        0700 AM  44.07N 92.77W

...FILLMORE COUNTY...
SPRING VALLEY 1 NW         1.63        0700 AM  43.70N 92.40W
SPRING VALLEY              1.51        0700 AM  43.69N 92.39W
SPRING VALLEY 3E           0.94        0700 AM  43.68N 92.33W
CARIMONA                   0.69        0700 AM  43.66N 92.15W
PRESTON AWOS               0.64        0700 AM  43.68N 92.18W
PRESTON 1 NNE              0.58        0700 AM  43.68N 92.08W
PRESTON                    0.52        0700 AM  43.67N 92.07W
HIGHLAND                   0.42        0700 AM  43.65N 91.84W
LANESBORO                  0.35        0700 AM  43.72N 91.97W
PILOT MOUND                0.33        0700 AM  43.78N 92.03W

...HOUSTON COUNTY...
HOUSTON                    0.38        0700 AM  43.77N 91.57W
MOUND PRAIRIE              0.21        0700 AM  43.78N 91.45W

...MOWER COUNTY...
GRAND MEADOW               1.01        0700 AM  43.71N 92.56W
AUSTIN                     0.42        0700 AM  43.67N 92.95W
AUSTIN WWTF                0.34        0700 AM  43.67N 92.95W
AUSTIN 3S                  0.32        0700 AM  43.62N 93.00W
AUSTIN-DOBBINS CREEK       0.28        0700 AM  43.67N 92.95W
AUSTIN AWOS                0.24        0700 AM  43.67N 92.93W
LANSING                    0.14        0700 AM  43.75N 92.95W

...OLMSTED COUNTY...
POST TOWN                  0.35        0700 AM  44.09N 92.82W
ROCHESTER - CASCADE CREEK  0.31        0700 AM  44.03N 92.48W
ROCHESTER - BEAR CREEK     0.29        0700 AM  43.92N 92.48W
ROCHESTER BELTLINE         0.26        0700 AM  43.91N 92.50W
ROCHESTER - SILVER CREEK   0.25        0700 AM  44.03N 92.42W
ROCHESTER AIRPORT          0.24
ELGIN                      0.19        0700 AM  44.10N 92.27W
ELBA                       0.14        0700 AM  44.05N 92.05W

...WABASHA COUNTY...
LAKE CITY-MISSISSIPPI RVR  0.37        0700 AM  44.45N 92.26W
LAKE CITY                  0.34        0700 AM  44.45N 92.26W
THEILMAN                   0.15        0700 AM  44.28N 92.19W
KELLOGG                    0.05        0700 AM  44.32N 92.00W

...WINONA COUNTY...
LA CRESCENT DAM 7          0.25        0600 AM  43.87N 91.31W
DAKOTA                     0.15        0700 AM  43.92N 91.37W
ST CHARLES 5N              0.12        0700 AM
ALTURA 5W                  0.11        0700 AM  44.06N 92.04W
ALTURA                     0.07        0700 AM  44.15N 92.01W
MINNESOTA CITY             0.06        0600 AM  44.16N 91.81W
WINONA DAM 5A              0.06        0600 AM  44.09N 91.67W

WISCONSIN

...ADAMS COUNTY...
FRIENDSHIP                 0.34        0700 AM  43.98N 89.83W

...BUFFALO COUNTY...
ALMA DAM 4                 0.18        0600 AM  44.33N 91.92W

...CLARK COUNTY...
NEILLSVILLE 7NW            1.70        
OWEN 2N                    1.65        0700 AM  44.98N 90.55W
NEILLSVILLE 3SW            1.62        0700 AM  44.53N 90.64W
NEILLSVILLE 1W             0.50        0700 AM  44.56N 90.61W

...CRAWFORD COUNTY...
SOLDIERS GROVE             1.07        0700 AM  43.39N 90.78W
PRAIRIE DU CHIEN           0.81        0700 AM  43.05N 91.13W
PRAIRIE DU CHIEN AWOS      0.76        0700 AM  43.30N 89.76W
LYNXVILLE DAM 9            0.59        0600 AM  43.21N 91.10W
MT ZION                    0.53
STEUBEN                    0.37        0700 AM  43.18N 90.87W

...GRANT COUNTY...
BOSCOBEL ASOS              0.66        0700 AM  43.16N 90.68W
PLATTEVILLE                0.64        0700 AM  42.80N 90.52W
BOSCOBEL RAWS              0.55        0700 AM  43.15N 90.68W
LANCASTER                  0.15        0700 AM
LANCASTER 4WSW             0.11        0700 AM  42.83N 90.79W
BURTON                     0.02        0700 AM  42.72N 90.82W
ROCKVILLE                  0.01        0700 AM  42.73N 90.64W

...JACKSON COUNTY...
MATHER 3NW                 0.14        0700 AM  44.17N 90.35W

...JUNEAU COUNTY...
NEW LISBON 4ENE            0.17        0700 AM  43.91N 90.07W
NECEDAH 5WNW               0.14        0700 AM  44.06N 90.17W
NECEDAH 1W                 0.05        0700 AM  44.02N 90.08W
NECEDAH                    0.05        0700 AM  44.00N 90.04W

...LA CROSSE COUNTY...
LA CROSSE-MISSISSIPPI RVR  0.33        0700 AM  43.80N 91.37W
LA CROSSE WEATHER OFFICE   0.24        0700 AM  43.82N 91.19W
LA CROSSE AIRPORT          0.20        0700 AM  43.88N 91.26W
HOLMEN 2S                  0.18        0700 AM
HOLLAND                    0.13        0700 AM  43.97N 91.29W

...MONROE COUNTY...
LEON                       0.50        0700 AM
TUNNEL CITY                0.14        0700 AM  44.01N 90.57W
WARRENS                    0.10        0700 AM  44.10N 90.59W

...RICHLAND COUNTY...
RICHLAND CENTER 1NW        0.77        0700 AM  43.36N 90.42W
RICHLAND CENTER            0.67        0700 AM

...TAYLOR COUNTY...
MEDFORD 1E                 1.02        0700 AM  45.14N 90.33W
LUBLIN DIAMOND LAKE        0.88        0700 AM  45.11N 90.69W
GAD 6E                     0.52        0700 AM  45.14N 90.20W
JUMP RIVER                 0.48        0700 AM  45.36N 90.80W
MEDFORD                    0.45        0700 AM  45.13N 90.34W
MEDFORD 4NW                0.44        0700 AM  45.21N 90.36W

...TREMPEALEAU COUNTY...
TREMPEALEAU DAM 6          0.09        0600 AM  44.00N 91.44W
GALESVILLE 3ENE            0.05        0700 AM  44.09N 91.29W
OSSEO                      0.01        0700 AM  44.58N 91.22W

...VERNON COUNTY...
LA FARGE                   2.68        0700 AM  43.57N 90.64W
VIROQUA 3ESE               1.42        0700 AM  43.55N 90.82W
VIROQUA 4WSW               1.14        0700 AM  43.54N 90.96W
HILLSBORO                  0.97        0700 AM  43.65N 90.33W
READSTOWN 4NE              0.90        0700 AM  43.48N 90.69W
VALLEY 1NW                 0.80        0700 AM
HILLSBORO WSW              0.67        0700 AM  43.65N 90.35W
READSTOWN                  0.59        0700 AM  43.45N 90.76W
COON VALLEY 5E             0.59        0700 AM  43.71N 90.92W
ONTARIO                    0.53        0700 AM  43.72N 90.59W
COON VALLEY 6S             0.44        0700 AM  43.61N 91.01W
WESTBY 3SE                 0.39        0700 AM  43.62N 90.82W
VIROQUA 4NE                0.36        0700 AM  43.61N 90.82W
WESTBY 3ENE                0.36        0700 AM  43.68N 90.81W
ONTARIO 3E                 0.36        0700 AM  43.72N 90.60W
GENOA DAM 8                0.27        0600 AM  43.57N 91.23W
WESTBY 2NNE                0.20        0700 AM  43.70N 90.85W
LIBERTY POLE 2SW           0.16        0700 AM  43.49N 90.95W

 

Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LA CROSSE WI
639 PM CDT WED JUL 18 2012

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

1258 PM     HAIL             HAYFIELD                43.89N 92.85W
07/18/2012  M1.50 INCH       DODGE              MN   TRAINED SPOTTER

0151 PM     HAIL             2 NE DEXTER             43.74N 92.67W
07/18/2012  M0.88 INCH       MOWER              MN   TRAINED SPOTTER

0158 PM     TSTM WND GST     1 W GRAND MEADOW        43.71N 92.59W
07/18/2012  E50.00 MPH       MOWER              MN   TRAINED SPOTTER

0227 PM     HAIL             1 S RACINE              43.76N 92.48W
07/18/2012  E0.75 INCH       MOWER              MN   TRAINED SPOTTER

            DIME SIZED HAIL

0227 PM     TSTM WND GST     1 S RACINE              43.76N 92.48W
07/18/2012  E50.00 MPH       MOWER              MN   TRAINED SPOTTER

0245 PM     TSTM WND DMG     SPRING VALLEY           43.69N 92.39W
07/18/2012                   FILLMORE           MN   EMERGENCY MNGR

            TREE BRANCHES UP TO 8 INCHES IN DIAMETER DOWN. LOCALIZED
            STREET FLOODING.

0250 PM     TSTM WND DMG     SPRING VALLEY           43.69N 92.39W
07/18/2012                   FILLMORE           MN   EMERGENCY MNGR

            SIX THREE FOOT DIAMETER TREES DOWN. PARK PAVILION AND
            APARTMENT BUILDING DAMAGED.

0254 PM     TSTM WND GST     5 W PRESTON             43.67N 92.18W
07/18/2012  M49.00 MPH       FILLMORE           MN   AWOS

0324 PM     HAIL             3 W FREDERICKSBURG      42.96N 92.26W
07/18/2012  E1.50 INCH       CHICKASAW          IA   PUBLIC

0327 PM     TSTM WND GST     HARMONY                 43.56N 92.01W
07/18/2012  M53.00 MPH       FILLMORE           MN   FIRE DEPT/RESCUE

0328 PM     HAIL             RIDGEWAY                43.30N 91.99W
07/18/2012  E1.75 INCH       WINNESHIEK         IA   PUBLIC

0340 PM     TSTM WND DMG     HESPER                  43.48N 91.79W
07/18/2012                   WINNESHIEK         IA   LAW ENFORCEMENT

            TREES DOWN IN TOWN.

0345 PM     TSTM WND DMG     2 S HIGHLANDVILLE       43.42N 91.68W
07/18/2012                   WINNESHIEK         IA   PUBLIC

            CORN BENT OVER AND SEVERAL TREES UPROOTED.

0345 PM     HEAVY RAIN       1 N CRESCO              43.39N 92.12W
07/18/2012  M1.20 INCH       HOWARD             IA   CO-OP OBSERVER

            RAIN AMOUNT IN 45 MINUTES.

0350 PM     TSTM WND DMG     1 N DECORAH             43.32N 91.79W
07/18/2012                   WINNESHIEK         IA   PUBLIC

            LARGE TREE UPROOTED.

0400 PM     TSTM WND GST     DECORAH                 43.31N 91.79W
07/18/2012  E50.00 MPH       WINNESHIEK         IA   PUBLIC

0401 PM     TSTM WND GST     4 N CALMAR              43.24N 91.87W
07/18/2012  M65.00 MPH       WINNESHIEK         IA   CO-OP OBSERVER

0406 PM     TSTM WND DMG     DORCHESTER              43.47N 91.52W
07/18/2012                   ALLAMAKEE          IA   CO-OP OBSERVER

            BARN DESTORYED. TIME ESTIMATED FROM RADAR.

0410 PM     TSTM WND GST     1 NW WAUKON             43.28N 91.49W
07/18/2012  E50.00 MPH       ALLAMAKEE          IA   PUBLIC

            SOME CORN BENT OVER.

0414 PM     TSTM WND GST     4 E NORDNESS            43.23N 91.70W
07/18/2012  M53.00 MPH       WINNESHIEK         IA   DEPT OF HIGHWAYS

0415 PM     TSTM WND DMG     WEST UNION              42.96N 91.81W
07/18/2012                   FAYETTE            IA   EMERGENCY MNGR

            A FEW TREES DOWN AND POWER LINES DOWN

0415 PM     TSTM WND GST     DORCHESTER              43.47N 91.52W
07/18/2012  E45.00 MPH       ALLAMAKEE          IA   CO-OP OBSERVER

            COUPLE OF 6 INCH DIAMETER TREE BRANCHES DOWN.

0420 PM     HEAVY RAIN       DECORAH                 43.31N 91.79W
07/18/2012  M1.50 INCH       WINNESHIEK         IA   PUBLIC

            HOUR RAINFALL TOTAL.

0445 PM     FLASH FLOOD      2 N LYNXVILLE           43.28N 91.05W
07/18/2012                   CRAWFORD           WI   LAW ENFORCEMENT

            ROCK SLIDE ONTO HWY 35 NORTH OF LYNXVILLE.

0445 PM     TSTM WND DMG     FERRYVILLE              43.34N 91.08W
07/18/2012                   CRAWFORD           WI   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN AROUND FERRYVILLE.

0445 PM     TSTM WND DMG     RICHLAND CENTER         43.34N 90.38W
07/18/2012                   RICHLAND           WI   AMATEUR RADIO

            5 INCH DIAMETER BRANCHES DOWN AT 4TH AND CEDAR.

0448 PM     HAIL             1 SW MOUNT IDA          42.96N 90.77W
07/18/2012  E0.25 INCH       GRANT              WI   LAW ENFORCEMENT

0450 PM     HEAVY RAIN       MONONA                  43.05N 91.39W
07/18/2012  M1.75 INCH       CLAYTON            IA   PUBLIC

            HALF HOUR RAINFALL TOTAL.

0450 PM     TSTM WND DMG     SENECA                  43.27N 90.97W
07/18/2012                   CRAWFORD           WI   LAW ENFORCEMENT

            REPORTS OF TREES POWER LINES DOWN ACROSS CRAWFORD COUNTY.
            LOCATION ESTIMATED FROM RADAR.

0450 PM     HEAVY RAIN       BURR OAK                43.45N 91.88W
07/18/2012  M1.75 INCH       WINNESHIEK         IA   BROADCAST MEDIA

            HOUR RAINFALL TOTAL.

0455 PM     TSTM WND GST     PRAIRIE DU CHIEN        43.04N 91.14W
07/18/2012  M52.00 MPH       CRAWFORD           WI   AWOS

0501 PM     TSTM WND DMG     PRAIRIE DU CHIEN        43.04N 91.14W
07/18/2012                   CRAWFORD           WI   LAW ENFORCEMENT

            TREES AND POWERLINES DOWN.

0512 PM     TSTM WND GST     PRAIRIE DU CHIEN        43.04N 91.14W
07/18/2012  M72.00 MPH       CRAWFORD           WI   PUBLIC

            MATURE TREES DOWN IN PARTS OF TOWN.

0512 PM     TSTM WND GST     BOSCOBEL                43.14N 90.70W
07/18/2012  M48.00 MPH       GRANT              WI   ASOS

0530 PM     TSTM WND DMG     RICHLAND CENTER         43.34N 90.38W
07/18/2012                   RICHLAND           WI   PUBLIC

            LARGE TREES 3 FEET IN DIAMETER SNAPPED OFF 8 TO 12 FEET
            ABOVE THE GROUND.

0530 PM     FLOOD            VIROQUA                 43.56N 90.89W
07/18/2012                   VERNON             WI   TRAINED SPOTTER

            SOME STREET FLOODING AROUND TOWN.

0533 PM     TSTM WND DMG     RICHLAND CENTER         43.34N 90.38W
07/18/2012                   RICHLAND           WI   LAW ENFORCEMENT

            TREES DOWN IN THE CITY. ALSO OTHER TREES DOWN IN THE
            COUNTY. TIME ESTIMATED VIA RADAR.


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.