The Severe Weather of July 25, 2012


Storm Pictures Local Storm Reports Rainfall Reports

On Wednesday, July 25th, a cold front moved through the region and was quiet for many hours. In the mid-evening, the front became active and thunderstorms developed over northcentral Iowa and these then shifted east into southern Wisconsin by midnight. Some hail was reported but the main story was damaging winds in the 60 to 70 mph range that downed power lines and trees. Some much needed rain fell over that area as well with reports up to 4 inches!

reports

radar loop

lightning

National storm reports from July 25th

Radar reflectivity loop from 8 pm July 25 to 1 am July 26. Polygons indicate Severe Thunderstorm Warnings issued by the NWS.

Hourly cloud-to-ground lightning loop from 8 pm July 25 to 1 am July 26. From 9-10pm, the region shown had over 4,000 strikes!

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Storm Photos

Damage near Nashua, Iowa 

   
nashua 1 nashua 2 nashua 3
nashua 4 Nashua radar  nashua 5 
   Matching radar image for Nashua damage (936 pm)  
     

Near Platteville, Wisconsin

   
Platteville Storm Platteville Storm  
  Matching radar image for photo (955 pm)  

Photo submissions courtesy of local photographers, spotters, and emergency managers.


 Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LA CROSSE WI
1241 AM CDT THU JUL 26 2012

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

0850 PM     TSTM WND GST     GUTTENBERG              42.79N 91.10W
07/25/2012  M64.00 MPH       CLAYTON            IA   BROADCAST MEDIA

            ALSO PENNY SIZED HAIL

0900 PM     HAIL             4 N GUTTENBERG          42.85N 91.10W
07/25/2012  M1.00 INCH       CLAYTON            IA   LAW ENFORCEMENT

0938 PM     TSTM WND DMG     NASHUA                  42.95N 92.54W
07/25/2012                   CHICKASAW          IA   LAW ENFORCEMENT

            LARGE TREE AND LIMBS DOWN

0944 PM     TSTM WND DMG     CASSVILLE               42.72N 90.99W
07/25/2012                   GRANT              WI   LAW ENFORCEMENT

            A FEW TREES AND POWER LINES DOWN

0945 PM     TSTM WND DMG     NASHUA                  42.95N 92.54W
07/25/2012                   CHICKASAW          IA   BROADCAST MEDIA

            POWER OUTAGES IN TOWN. TREE BRANCHES DOWN. WIND BUSTED
            OUT WINDOW OF HOME.

0948 PM     TSTM WND DMG     ELLENBORO               42.78N 90.62W
07/25/2012                   GRANT              WI   LAW ENFORCEMENT

            A BARN DOWN ALONG WITH NUMEROUS TREES

0954 PM     TSTM WND GST     3 N PLATTEVILLE         42.78N 90.48W
07/25/2012  M60.00 MPH       GRANT              WI   TRAINED SPOTTER

            TREE BRANCHES DOWN. ALSO 1/2 INCH HAIL OBSERVED

1005 PM     HAIL             2 NW WESTGATE           42.79N 92.02W
07/25/2012  M0.50 INCH       FAYETTE            IA   BROADCAST MEDIA

            IN THE TOWN OF SUMNER

1013 PM     TSTM WND DMG     HAWKEYE                 42.94N 91.95W
07/25/2012                   FAYETTE            IA   LAW ENFORCEMENT

            NUMEROUS REPORTS OF TREES AND POWER LINES DOWN ACROSS
            TOWN

1020 PM     TSTM WND GST     OELWEIN                 42.68N 91.91W
07/25/2012  E45.00 MPH       FAYETTE            IA   TRAINED SPOTTER

            ALSO 1/2 INCH HAIL

1023 PM     TSTM WND DMG     WEST UNION              42.96N 91.81W
07/25/2012                   FAYETTE            IA   LAW ENFORCEMENT

            NUMEROUS REPORTS OF TREES AND POWER LINES DOWN ACROSS
            TOWN

1025 PM     TSTM WND DMG     ELKADER                 42.86N 91.40W
07/25/2012                   CLAYTON            IA   LAW ENFORCEMENT

            SUMMARY FROM CLAYTON COUNTY LAW ENFORCEMENT. 17 REPORTS
            OF POWER LINES DOWN ACROSS COUNTY. AT LEAST 30 REPORTS OF
            TREES DOWN. 1 ONE INCH HAIL REPORT IN GUTTENBERG

1025 PM     HAIL             3 N FAYETTE             42.88N 91.80W
07/25/2012  M1.00 INCH       FAYETTE            IA   AMATEUR RADIO

1043 PM     HEAVY RAIN       OELWEIN                 42.68N 91.91W
07/25/2012  M2.00 INCH       FAYETTE            IA   TRAINED SPOTTER

            SOME PONDING ON ROADWAYS IN TOWN

1045 PM     HEAVY RAIN       GARNAVILLO              42.87N 91.24W
07/25/2012  M4.00 INCH       CLAYTON            IA   LAW ENFORCEMENT

1048 PM     TSTM WND DMG     EDGEWOOD                42.65N 91.40W
07/25/2012                   CLAYTON            IA   TRAINED SPOTTER

            18 INCH DIAMETER TREE DOWN

1048 PM     TSTM WND DMG     EDGEWOOD                42.65N 91.40W
07/25/2012                   CLAYTON            IA   TRAINED SPOTTER

            POWER OUT ACROSS TOWN. A FEW TREE BRANCHES DOWN

1050 PM     TSTM WND GST     EDGEWOOD                42.65N 91.40W
07/25/2012  M43.00 MPH       CLAYTON            IA   TRAINED SPOTTER

            MEASURED AT THE FIRE DEPT

1112 PM     TSTM WND DMG     LANCASTER               42.85N 90.71W
07/25/2012                   GRANT              WI   LAW ENFORCEMENT

            SEVERAL REPORTS OF TREES DOWN ACROSS TOWN

1122 PM     TSTM WND DMG     FENNIMORE               42.98N 90.65W
07/25/2012                   GRANT              WI   LAW ENFORCEMENT

            SEVERAL POWER LINES DOWN ACROSS TOWN

1152 PM     TSTM WND DMG     4 SW SEXTONVILLE        43.24N 90.35W
07/25/2012                   RICHLAND           WI   AMATEUR RADIO

            6 INCH DIAMETER TREE AND SEVERAL BRANCHES DOWN ALONG
            RIVERVIEW RIDGE DRIVE.

1155 PM     TSTM WND DMG     SEXTONVILLE             43.28N 90.30W
07/25/2012                   RICHLAND           WI   AMATEUR RADIO

            TREES DOWN ACROSS TOWN

1201 AM     TSTM WND GST     GOTHAM                  43.21N 90.30W
07/26/2012  M54.00 MPH       RICHLAND           WI   AMATEUR RADIO
 

Rainfall Reports

 

...24 HOUR RAINFALL TOTALS ENDING 7 AM THURSDAY JULY 26TH...

LOCATION                   RAINFALL    TIME     LAT/LON


IOWA

...ALLAMAKEE COUNTY...
ION                        1.56        0700 AM  43.11N 91.27W
POSTVILLE                  0.61        0700 AM  43.09N 91.56W
HARPERS FERRY              0.21        0700 AM  43.17N 91.24W
LANSING 4SE                0.09        0700 AM  43.32N 91.16W
WAUKON                     0.09        0700 AM  43.27N 91.47W

...CHICKASAW COUNTY...
IONIA                      0.21        0700 AM  43.03N 92.50W
NEW HAMPTON                0.20        0700 AM  43.06N 92.31W

...CLAYTON COUNTY...
ELKADER                    2.28        0700 AM  42.84N 91.40W
MARQUETTE                  1.43        0700 AM  43.04N 91.21W
ELKADER 6SSW               1.35        0700 AM  42.79N 91.45W
VOLGA                      1.26        0700 AM  42.81N 91.52W
LITTLEPORT                 1.06        0700 AM  42.75N 91.37W
GUTTENBERG                 1.00        0700 AM  42.79N 91.10W
EDGEWOOD                   0.89        0700 AM  42.65N 91.40W
MONONA                     0.81        0700 AM  43.04N 91.40W
GARBER                     0.47        0700 AM  42.74N 91.26W
MCGREGOR                   0.40        0700 AM  43.02N 91.17W

...FAYETTE COUNTY...
OELWEIN AWOS               2.79        0700 AM  42.68N 91.97W
FAYETTE                    1.92        0700 AM  42.85N 91.82W
ELDORADO                   0.70        0700 AM  43.05N 91.81W
CLERMONT                   0.34        0700 AM  43.00N 91.66W

...FLOYD COUNTY...
NASHUA                     0.92        0700 AM  42.94N 92.57W
CHARLES CITY AWOS          0.04        0700 AM  43.07N 92.61W
CHARLES CITY COOP          0.03        0700 AM  43.08N 92.67W

...MITCHELL COUNTY...
ST ANSGAR                  0.05        0700 AM  43.37N 92.83W

...WINNESHIEK COUNTY...
WAUCOMA                    0.47        0700 AM  43.05N 92.04W
CALMAR                     0.11        0700 AM  43.18N 91.87W
DECORAH AWOS               0.04        0700 AM  43.28N 91.74W
DECORAH                    0.03        0700 AM  43.30N 91.80W

MINNESOTA

...MOWER COUNTY...
LANSING                    0.04        0700 AM  43.75N 92.95W
AUSTIN                     0.01        0700 AM  43.67N 92.95W

...WABASHA COUNTY...
LAKE CITY                  0.01        0700 AM  44.45N 92.26W

WISCONSIN

...CRAWFORD COUNTY...
PRAIRIE DU CHIEN           2.41        0700 AM  43.05N 91.13W
STEUBEN                    0.74        0700 AM  43.18N 90.87W
LYNXVILLE DAM 9            0.27        0700 AM  43.21N 91.10W
STEUBEN 4SE                0.18        0700 AM  43.13N 90.84W
SOLDIERS GROVE             0.11        0700 AM  43.39N 90.78W

...GRANT COUNTY...
MILLVILLE                  3.23        0700 AM  43.03N 90.93W
BOSCOBEL RAWS              1.76        0700 AM  43.15N 90.68W
BOSCOBEL ASOS              1.65        0700 AM  43.16N 90.68W
LANCASTER 4WSW             1.56        0700 AM  42.83N 90.79W
PLATTEVILLE                1.28        0700 AM  42.80N 90.52W
LANCASTER                  1.17        0700 AM  42.85N 90.71W
CUBA CITY                  0.52        0700 AM  42.63N 90.46W
ROCKVILLE                  0.49        0700 AM  42.73N 90.64W
BURTON                     0.45        0700 AM  42.72N 90.82W
PLATTEVILLE AWOS           0.02        0700 AM  42.69N 90.44W

...JUNEAU COUNTY...
NEW LISBON 4ENE            0.02        0700 AM  43.91N 90.07W

...LA CROSSE COUNTY...
LA CROSSE WEATHER          0.01        0700 AM  43.82N 91.19W
HOLMEN                     0.01        0700 AM  43.97N 91.27W

...RICHLAND COUNTY...
RICHLAND CENTER            2.62        0700 AM  43.34N 90.38W
RICHLAND CENTER 1NW        2.25        0700 AM  43.36N 90.42W

...TAYLOR COUNTY...
MEDFORD                    0.02        0700 AM  45.13N 90.34W

...TREMPEALEAU COUNTY...
TREMPEALEAU DAM 6          0.03        0700 AM  44.00N 91.44W
WHITEHALL 2W               0.03        0700 AM  44.37N 91.36W

...VERNON COUNTY...
READSTOWN 4NE              0.09        0700 AM  43.48N 90.69W
READSTOWN                  0.08        0700 AM  43.45N 90.76W
HILLSBORO                  0.04        0700 AM  43.65N 90.33W
LA FARGE                   0.03        0700 AM  43.57N 90.64W
ONTARIO                    0.03        0700 AM  43.72N 90.59W
DESOTO 1SE                 0.03        0700 AM  43.41N 91.19W
WESTBY 3ENE                0.03        0700 AM  43.68N 90.81W
VIROQUA                    0.02        0700 AM  43.55N 90.90W

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