August 9, 2012 Severe Weather Reports

During the late afternoon of August 9th, a strong low pressure system moved through the Upper Mississippi River Valley. This system produced some severe thunderstorms west of the Mississippi River.  Two-inch diameter hail fell near Decorah, IA and 70 mph winds were reported near Conover and Calmar in northeast Iowa (Winneshiek County). 

In addition to the severe weather, most areas received up to a half inch of rain from this storm system.  The highest rainfall reports received were from Neillsville, WI (1.48 inches); Pilot Mound, MN (1.32 inches); Lanesboro, MN (1.19 inches); and West Union, IA (1.15 inches).

rainfall

 

Radar Estimated Rainfall
from August 9, 2012

 Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LA CROSSE WI
933 PM CDT THU AUG 09 2012

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

0223 PM     HAIL             3 SE LAKE CITY          44.42N 92.24W
08/09/2012  E0.50 INCH       WABASHA            MN   PUBLIC

            PEA TO MARBLE SIZE HAIL COVERED LAKE PEPIN GOLF COURSE

0227 PM     HAIL             4 WSW WABASHA           44.35N 92.12W
08/09/2012  E0.88 INCH       WABASHA            MN   PUBLIC

0240 PM     HAIL             6 WSW WABASHA           44.34N 92.16W
08/09/2012  E0.50 INCH       WABASHA            MN   PUBLIC

0258 PM     HAIL             4 NNE PLAINVIEW         44.22N 92.14W
08/09/2012  E0.88 INCH       WABASHA            MN   TRAINED SPOTTER

0320 PM     TSTM WND DMG     5 N ST. CHARLES         44.04N 92.06W
08/09/2012                   WINONA             MN   AMATEUR RADIO

            15 INCH DIAMETER WALNUT TREE SNAPPED 30 FEET ABOVE
            GROUND. CORN PUSHED OVER 45 DEGREES. SOME CORN SNAPPED ON
            TOP. OTHER TREES PUSHED OVER.

0320 PM     HAIL             5 N ST. CHARLES         44.04N 92.06W
08/09/2012  E0.50 INCH       WINONA             MN   AMATEUR RADIO

0455 PM     HAIL             4 E RIDGEWAY            43.30N 91.91W
08/09/2012  E1.00 INCH       WINNESHIEK         IA   PUBLIC

            DIME TO QUARTER SIZED. ALSO SOME SMALL BRANCHES DOWNED
            FROM WIND.

0456 PM     HAIL             4 E RIDGEWAY            43.30N 91.91W
08/09/2012  E1.75 INCH       WINNESHIEK         IA   PUBLIC

            QUARTER TO GOLFBALL. DENTED CAMPER. WIND ESTIMATED AT 50
            MPH WITH LEAVES SPRAYED ONTO SIDE OF HOUSE. NO DAMAGE TO
            HOME SIDING.

0456 PM     HAIL             2 W DECORAH             43.31N 91.83W
08/09/2012  M2.00 INCH       WINNESHIEK         IA   PUBLIC

            COURTESY KWWL MEDIA. VERIFIED WITH PICTURE.

0505 PM     TSTM WND GST     CONOVER                 43.21N 91.92W
08/09/2012  E70.00 MPH       WINNESHIEK         IA   LAW ENFORCEMENT

0510 PM     TSTM WND GST     CALMAR                  43.18N 91.87W
08/09/2012  E70.00 MPH       WINNESHIEK         IA   FIRE DEPT/RESCUE

            CALMAR FIRE DEPARTMENT ESTIMATED A WIND GUST OF 70 MILES
            PER HOUR.

0510 PM     HAIL             2 NE CALMAR             43.20N 91.84W
08/09/2012  M1.00 INCH       WINNESHIEK         IA   CO-OP OBSERVER

            COOPERATIVE OBSERVER MEASURED UP TO QUARTER SIZE HAIL.
            DRIFTS OF HAIL IN ROAD DITCH AND THE CORN WAS STRIPPED OF
            THE LEAVES WITH STALKS AND EARS LEFT.

Rainfall Reports

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
738 AM CDT FRI AUG 10 2012

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

LOCATION                   RAINFALL    TIME     LAT/LON


IOWA

...ALLAMAKEE COUNTY...
WAUKON                     0.16        0700 AM  43.27N 91.47W
DORCHESTER HIGHWAY 76      0.07        0700 AM  43.42N 91.51W
LANSING 4SE                0.06        0700 AM  43.32N 91.16W
HARPERS FERRY              0.05        0700 AM  43.17N 91.24W
ION                        0.04        0700 AM  43.11N 91.27W

...CHICKASAW COUNTY...
IONIA                      0.52        0700 AM  43.03N 92.50W

...CLAYTON COUNTY...
VOLGA                      0.23        0700 AM  42.81N 91.52W
ELKADER 6SSW               0.14        0700 AM  42.79N 91.45W
GUTTENBERG                 0.09        0700 AM  42.79N 91.10W
LITTLEPORT                 0.08        0700 AM  42.75N 91.37W
ELKADER                    0.07        0700 AM  42.84N 91.40W
MONONA                     0.04        0700 AM  43.04N 91.40W
GARBER                     0.04        0700 AM  42.74N 91.26W
MARQUETTE                  0.03        0700 AM  43.04N 91.21W

...FAYETTE COUNTY...
ELDORADO                   0.49        0700 AM  43.05N 91.81W
FAYETTE                    0.36        0700 AM  42.85N 91.82W
OELWEIN AWOS               0.00        0700 AM  42.68N 91.97W

...FLOYD COUNTY...
CHARLES CITY AWOS          0.46        0700 AM  43.07N 92.61W
COLWELL                    0.15        0700 AM  43.16N 92.59W

...MITCHELL COUNTY...
ST ANSGAR                  0.30        0700 AM  43.37N 92.83W

...WINNESHIEK COUNTY...
BLUFFTON                   0.40        0700 AM  43.41N 91.90W
DECORAH                    0.21        0700 AM  43.30N 91.80W
DECORAH AWOS               0.08        0700 AM  43.28N 91.74W

MINNESOTA

...DODGE COUNTY...
DODGE CENTER AWOS          0.27        0700 AM  44.03N 92.83W

...FILLMORE COUNTY...
PILOT MOUND                1.32        0700 AM  43.78N 92.03W
LANESBORO                  1.19        0700 AM  43.72N 91.97W
HIGHLAND                   0.61        0700 AM  43.65N 91.84W
PRESTON AWOS               0.33        0700 AM  43.68N 92.18W
CARIMONA                   0.26        0700 AM  43.66N 92.15W
SPRING VALLEY 3E           0.05        0700 AM  43.68N 92.33W

...HOUSTON COUNTY...
HOUSTON                    0.13        0700 AM  43.77N 91.57W
MOUND PRAIRIE              0.06        0700 AM  43.78N 91.45W

...MOWER COUNTY...
AUSTIN                     0.44        0700 AM  43.67N 92.95W
LANSING                    0.41        0700 AM  43.75N 92.95W
AUSTIN AWOS                0.38        0700 AM  43.67N 92.93W
AUSTIN 3S                  0.01        0700 AM  43.62N 93.00W

...OLMSTED COUNTY...
ELBA                       0.97        0700 AM  44.05N 92.05W
DOVER 1E                   0.83        0700 AM  43.97N 92.12W
ROCHESTER - CASCADE CREEK  0.48        0700 AM  44.03N 92.48W
BYRON                      0.38        0700 AM  44.07N 92.66W
POST TOWN                  0.37        0700 AM  44.09N 92.82W
ROCHESTER - BEAR CREEK     0.22        0700 AM  43.92N 92.48W
ROCHESTER 5SW              0.19        0700 AM  43.98N 92.56W
ELGIN                      0.17        0700 AM  44.10N 92.27W
ROCHESTER AP 2NE           0.09        0700 AM  43.93N 92.48W
ROCHESTER - SILVER CREEK   0.09        0700 AM  44.03N 92.42W
ROCHESTER BELTLINE         0.09        0700 AM  43.91N 92.50W
ROCHESTER ASOS             0.05        0700 AM  43.91N 92.50W

...WABASHA COUNTY...
LAKE CITY                  0.86        0700 AM  44.45N 92.26W
KELLOGG                    0.24        0700 AM  44.32N 92.00W

...WINONA COUNTY...
ALTURA                     0.42        0700 AM  44.15N 92.01W
WINONA                     0.16        0700 AM  44.09N 91.67W
MINNESOTA CITY             0.10        0700 AM  44.16N 91.81W
LA CRESCENT DAM 7          0.07        0700 AM  43.87N 91.31W
DAKOTA                     0.05        0700 AM  43.92N 91.37W

WISCONSIN

...BUFFALO COUNTY...
ALMA DAM 4                 0.06        0700 AM  44.33N 91.92W

...CLARK COUNTY...
NEILLSVILLE 3SW            1.48        0700 AM  44.53N 90.64W
NEILLSVILLE                0.50        0700 AM  44.56N 90.61W

...CRAWFORD COUNTY...
LYNXVILLE DAM 9            0.11        0700 AM  43.21N 91.10W
STEUBEN                    0.04        0700 AM  43.18N 90.87W
PRAIRIE DU CHIEN           0.03        0700 AM  43.05N 91.13W
PRAIRIE DU CHIEN AWOS      0.01        0700 AM  43.30N 89.76W

...GRANT COUNTY...
MUSCODA                    0.53        0700 AM  43.20N 90.44W
BOSCOBEL ASOS              0.15        0700 AM  43.16N 90.68W
BOSCOBEL RAWS              0.10        0700 AM  43.15N 90.68W
ROCKVILLE                  0.01        0700 AM  42.73N 90.64W

...JACKSON COUNTY...
HATFIELD DAM               0.46        0700 AM  44.41N 90.73W
BLACK RIVER FALLS          0.20        0700 AM  44.38N 90.84W
BLACK RIVER FALLS AWOS     0.18        0700 AM  44.25N 90.86W
BLACK RIVER FALLS RAWS     0.15        0700 AM  44.30N 90.84W

...JUNEAU COUNTY...
NEW LISBON 4ENE            0.76        0700 AM  43.91N 90.07W
CAMP DOUGLAS               0.68        0700 AM  43.94N 90.26W
NECEDAH 1W                 0.56        0700 AM  44.02N 90.08W
NECEDAH 5WNW               0.48        0700 AM  44.06N 90.17W

...LA CROSSE COUNTY...
WEST SALEM 2W              0.06        0700 AM  43.90N 91.12W
HOLMEN 2S                  0.05        0700 AM  43.93N 91.25W
LA CROSSE NWS              0.03        0700 AM  43.82N 91.19W
LA CROSSE AIRPORT            T         0700 AM  43.88N 91.26W

...MONROE COUNTY...
FOUR CORNERS               0.23        0700 AM  44.07N 90.92W
SPARTA AWOS                0.07        0700 AM  43.96N 90.74W

...RICHLAND COUNTY...
RICHLAND CENTER 1NW        0.43        0700 AM  43.36N 90.42W

...TAYLOR COUNTY...
LUBLIN DIAMOND LAKE        0.86        0700 AM  45.11N 90.69W
JUMP RIVER                 0.34        0700 AM  45.36N 90.80W

...TREMPEALEAU COUNTY...
OSSEO                      0.35        0700 AM  44.58N 91.22W
TREMPEALEAU DAM 6          0.30        0700 AM  44.00N 91.44W
GALESVILLE 3ENE            0.16        0700 AM  44.09N 91.29W

...VERNON COUNTY...
HILLSBORO                  0.93        0700 AM  43.65N 90.35W
ONTARIO                    0.89        0700 AM  43.72N 90.59W
HILLSBORO***               0.81        0700 AM  43.65N 90.33W
LIBERTY POLE 2SW           0.20        0700 AM  43.49N 90.95W
LA FARGE                   0.18        0700 AM  43.57N 90.64W
SEAS BRANCH HAUGEN         0.16        0700 AM  43.61N 90.85W
COON VALLEY 6S             0.16        0700 AM  43.61N 91.01W
READSTOWN                  0.15        0700 AM  43.45N 90.76W
VIROQUA 4NE                0.11        0700 AM  43.61N 90.82W
VIROQUA 3ESE               0.08        0700 AM  43.55N 90.82W
COON VALLEY 5E             0.07        0700 AM  43.71N 90.92W
WESTBY 2NNE                0.04        0700 AM  43.70N 90.85W
VIROQUA 4WSW               0.04        0700 AM  43.54N 90.96W
STODDARD                   0.03        0700 AM  43.66N 91.24W
GENOA                      0.02        0700 AM  43.57N 91.23W

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

$$



Return to News Archive

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