From July 22nd through July 24th, a frontal boundary with tropical moisture pooled along it meandered across Iowa, northern Illinois, southern Wisconsin, and southern Minnesota. As low pressure systems moved along this front, multiple rounds of showers and thunderstorms with heavy rainfall occurred. The first of these systems moved through during the morning of July 22nd, which produced widespread rainfall totals of 1 to 2 inches. The next system and its associated round of showers and thunderstorms moved into the Upper Mississippi River Valley region during the afternoon of July 22nd and lingered through the morning of July 23rd. Between eight and ten inches of rain fell across southern Fayette and Clayton counties in northeast Iowa, and the southern third of Grant County in southwest Wisconsin. This caused some flash flooding in Oelwein (Fayette County) and Edgewood (Clayton County). The final system and round of precipitation moved through from the evening of July 23rd through the early morning hours of July 24th. This system produced another 2 to 4 inches of rain across the same areas which were hit hard from the previous round of heavy rain, resulting in additional flash flooding.
Below are images of precipitation totals during the July 22-24 time period, storm reports received from strong storms that moved across during the early morning hours of July 24th, and a table listing the 3 day precipitation totals.
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| Precipitation from 7 AM July 21st through 7 AM July 22nd |
Precipitation from 7 AM July 22nd through 7 AM July 23rd |
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| Precipitation from 7 AM July 23rd through 7 AM July 24th |
3-Day Total: Precipitation from 7 AM July 21st through 7 AM July 24th |
Storm Reports
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LA CROSSE WI
1153 AM CDT SAT JUL 24 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1139 PM FLASH FLOOD ARLINGTON 42.75N 91.67W
07/23/2010 FAYETTE IA BROADCAST MEDIA
MAIN STREET IMPASSABLE DUE TO RISING WATER AND RUNOFF.
1139 PM FLASH FLOOD OELWEIN 42.68N 91.91W
07/23/2010 FAYETTE IA AMATEUR RADIO
WATER OVER HIGHWAY 150 AND HIGHWAY 3 IN OELWEIN
1236 AM FLOOD 2 W ARLINGTON 42.75N 91.71W
07/24/2010 FAYETTE IA AMATEUR RADIO
ROAD SHOULDERS WASHED OUT IN MANY SPOTS ALONG HIGHWAY
187. MANY ACRES OF FARM FIELDS UNDER WATER.
0148 AM FLASH FLOOD 2 W DICKEYVILLE 42.63N 90.63W
07/24/2010 GRANT WI EMERGENCY MNGR
SIGNIFICANT FLOODING OCCURING IN DICKEYVILLE AREA. NEW 20
FOOT BRIDGE WASHED OUT ALONG INDIAN CREEK
0204 AM FLASH FLOOD 1 E CHARLES CITY 43.07N 92.66W
07/24/2010 FLOYD IA BROADCAST MEDIA
HIGHWAY 18 UNDER WATER.
0213 AM TSTM WND DMG ELMA 43.25N 92.44W
07/24/2010 HOWARD IA NWS EMPLOYEE
BROTHER OF NWS QUAD CITIES EMPLOYEE REPORTED TREES DOWN
AROUND THE ELMA AREA. UPDATE...5 FOOT DIAMETER TREES WERE
SNAPPED OFF...SOME ROOFS WERE DAMAGED...ALL DAMAGE
APPEARED TO BE STRAIGHT-LINE WINDS.
0215 AM HEAVY RAIN BURTON 42.72N 90.82W
07/24/2010 M3.28 INCH GRANT WI MESONET
TOTAL RAINFALL IN 3.5 HOURS. 2.07 FELL IN ONE HOUR.
0215 AM HEAVY RAIN ROCKVILLE 42.73N 90.68W
07/24/2010 M4.53 INCH GRANT WI MESONET
RAINFALL IN 3.5 HOURS. 2.82 FELL IN 1 HOUR.
0218 AM TSTM WND DMG CHARLES CITY 43.07N 92.68W
07/24/2010 FLOYD IA COUNTY OFFICIAL
ESTIMATED 50 TO 60 MPH WIND...SEVERAL TREES DOWN IN THE
CITY.
0218 AM FLOOD PLATTEVILLE 42.74N 90.48W
07/24/2010 GRANT WI TRAINED SPOTTER
FLOODWATER FLOWING OVER PIONEER ROAD AT SOUTHWEST ROAD
0226 AM TSTM WND DMG CRESCO 43.37N 92.12W
07/24/2010 HOWARD IA LAW ENFORCEMENT
AWNING TORN OFF OF CAR DEALERSHIP WITH DEBRIS THROWN
SEVERAL BLOCKS. PICNIC TABLES AT NEARBY RESTAURANT LIFTED
WITH BUSTED WINDOWS AND DOWNED TREES.
0240 AM TSTM WND DMG MONDOVI 44.57N 91.67W
07/24/2010 BUFFALO WI CO-OP OBSERVER
LOT OF TREES AND POWER LINES DOWN. NO POWER AT THE
OBSERVERS HOME.
0314 AM TSTM WND GST LA CROSSE 43.83N 91.23W
07/24/2010 M56.00 MPH LA CROSSE WI ASOS
0314 AM TSTM WND DMG 2 S LA CROSSE 43.80N 91.23W
07/24/2010 LA CROSSE WI AMATEUR RADIO
TREES DOWN...SOME UPROOTED AND SOME SNAPPED OFF
0315 AM TSTM WND GST 2 S HOLMEN 43.93N 91.26W
07/24/2010 E45.00 MPH LA CROSSE WI NWS EMPLOYEE
0317 AM TSTM WND GST 3 SE LA CROSSE 43.80N 91.19W
07/24/2010 M57.00 MPH LA CROSSE WI AMATEUR RADIO
MEASUREMENT FROM DAVIS WEATHER STATION. ALSO TREES AND
SIGNS DOWN AROUND THE SHELBY MALL AREA ON THE SOUTH SIDE
OF LA CROSSE.
0318 AM TSTM WND DMG BARRE MILLS 43.84N 91.12W
07/24/2010 LA CROSSE WI NWS EMPLOYEE
A COUPLE OF TREES AND SEVERAL LARGE BRANCHES BLOWN DOWN
0318 AM TSTM WND GST 2 E LA CROSSE 43.83N 91.19W
07/24/2010 M39.00 MPH LA CROSSE WI OFFICIAL NWS OBS
0545 AM FLOOD GARBER 42.74N 91.26W
07/24/2010 CLAYTON IA LAW ENFORCEMENT
WATER FLOODING SOME CORN FIELDS. COUNTY ROAD C7X ALSO HAD
WATER OVER.
0630 AM FLOOD LITTLEPORT 42.75N 91.37W
07/24/2010 CLAYTON IA LAW ENFORCEMENT
WASHOUTS REPORTED ON MOST SECONDARY OR GRAVEL ROADS IN
SOUTHERN PART OF COUNTY.
0700 AM HEAVY RAIN PLATTEVILLE 42.74N 90.48W
07/24/2010 M4.60 INCH GRANT WI AMATEUR RADIO
0700 AM HEAVY RAIN STRAWBERRY POINT 42.68N 91.54W
07/24/2010 M3.19 INCH CLAYTON IA CO-OP OBSERVER
0700 AM HEAVY RAIN DICKEYVILLE 42.63N 90.59W
07/24/2010 M9.25 INCH GRANT WI EMERGENCY MNGR
TWO DAY TOTAL
Rainfall Reports
PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1130 AM CDT SAT JUL 24 2010 ...REPORTED 3 DAY RAINFALL... LOCATION RAINFALL TIME LAT/LON IOWA ...ALLAMAKEE COUNTY... WAUKON 3.08 0700 AM 43.27N 91.48W LANSING 4SE 2.49 0700 AM 43.32N 91.16W DORCHESTER 2.22 0700 AM 43.47N 91.50W ...CHICKASAW COUNTY... IONIA 3.06 0700 AM 43.03N 92.50W ...CLAYTON COUNTY... STRAWBERRY POINT 12.23 0700 AM 42.68N 91.53W GUTTENBERG DAM 10 6.69 0700 AM 42.79N 91.10W VOLGA 6.43 0700 AM 42.81N 91.52W ...FAYETTE COUNTY... OELWEIN 0.8 WNW COCORAHS 12.18 FAYETTE 5.43 0700 AM 42.83N 91.80W WAUCOMA 3.2S COCORAHS 3.70 0700 AM WAUCOMA 1.72 0700 AM 43.05N 92.04W ...FLOYD COUNTY... NASHUA ISU AG 3.64 0700 AM 42.93N 92.55W CHARLES CITY 2.90 0700 AM 43.05N 92.67W ...HOWARD COUNTY... CRESCO 1 NE 2.34 0700 AM 43.38N 92.10W ...MITCHELL COUNTY... ST ANSGAR 2.11 0700 AM 43.38N 92.92W ...WINNESHIEK COUNTY... CALMAR 2.84 0700 AM 43.18N 91.87W MINNESOTA ...FILLMORE COUNTY... PRESTON 2.66 0700 AM 43.67N 92.08W HIGHLAND 2.43 0700 AM 43.65N 91.84W LANESBORO 2.28 0700 AM 43.72N 91.97W SPRING VALLEY 1.72 0700 AM 43.69N 92.39W SPRING VALLEY 3E 1.60 0700 AM 43.68N 92.33W ...HOUSTON COUNTY... SPRING GROVE 2.43 0700 AM 43.61N 91.62W ...MOWER COUNTY... AUSTIN 2.57 0700 AM 43.67N 92.97W GRAND MEADOW 2.06 0700 AM 43.70N 92.57W ...OLMSTED COUNTY... BYRON 2.86 0700 AM 44.04N 92.64W ELGIN 2SSW 2.70 0700 AM 44.10N 92.27W ROCHESTER ARPT 2NE 1.88 0700 AM 43.93N 92.48W ...WABASHA COUNTY... ZUMBRO FALLS 3.37 0700 AM 44.29N 92.43W THEILMAN 3.12 0700 AM 44.29N 92.19W ...WINONA COUNTY... MINNESOTA CITY LD5 2.50 0700 AM 44.16N 91.81W LA CRESCENT DAM 7 2.46 0700 AM 43.87N 91.30W WINONA DAM 5A 2.41 0700 AM 44.09N 91.67W WISCONSIN ...BUFFALO COUNTY... ALMA 3.40 0700 AM 44.33N 91.93W MONDOVI MIRROR LAKE 2.27 0700 AM 44.57N 91.73W ...CLARK COUNTY... NEILLSVILLE 2.01 0700 AM 44.53N 90.64W OWEN 1.84 0700 AM 44.95N 90.53W ...CRAWFORD COUNTY... GAYS MILLS 6.1SE COCORAHS 4.13 0700 AM STEUBEN 4SE 4.22 0700 AM 43.13N 90.84W GAYS MILLS 3.34 0700 AM 43.32N 90.85W SOLDIERS GROVE 3.29 0700 AM 43.40N 90.78W LYNXVILLE DAM 9 3.28 0700 AM 43.22N 91.10W ...GRANT COUNTY... ROCKVILLE 8.96 0700 AM 42.73N 90.64W SINSINAWA 8.70 0700 AM 42.52N 90.54W BURTON 7.44 0700 AM 42.72N 90.82W CUBA CITY 6.59 0700 AM 42.63N 90.46W LANCASTER 0.3N COCORAHS 5.97 0700 AM ...JACKSON COUNTY... TAYLOR 3.28 0700 AM 44.32N 91.12W BLACK RIVER FALLS 1.7NNE COCORAHS 2.93 0700 AM BLACK RIVER FALLS 2.82 0700 AM 44.28N 90.85W ...JUNEAU COUNTY... NECEDAH 2SE 4.12 0700 AM 44.00N 90.04W ...LA CROSSE COUNTY... WEST SALEM 2.69 0700 AM 43.90N 91.09W LA CROSSE AIRPORT 2.52 0700 AM 43.88N 91.26W LA CROSSE-FRENCH ISLAND 2.46 0700 AM 43.87N 91.27W ONALASKA 1.6NW COCORAHS 2.21 0700 AM HOLMEN 0.9N COCORAHS 2.10 0700 AM FOUR CORNERS 1.73 0700 AM 44.07N 90.92W ...MONROE COUNTY... WARRENS 5WSW 3.95 0700 AM 44.10N 90.59W WILTON 4.2E COCORAHS 2.93 0700 AM TUNNEL CITY 1S 2.74 0700 AM 44.01N 90.57W SPARTA 2.48 0700 AM 43.93N 90.82W ...RICHLAND COUNTY... RICHLAND CENTER 1NW 2.62 0700 AM 43.36N 90.42W RICHLAND CENTER 2.55 0700 AM 43.33N 90.38W ...TREMPEALEAU COUNTY... OSSEO 2.59 0700 AM 44.58N 91.22W TREMPEALEAU DAM 6 1.89 0700 AM 44.00N 91.44W ...VERNON COUNTY... ONTARIO 3.24 0700 AM 43.71N 90.59W HILLSBORO 2.65 0700 AM 43.65N 90.33W LA FARGE 2.43 0700 AM 43.57N 90.64W DE SOTO 1SE 2.16 0700 AM 43.41N 91.19W GENOA DAM 8 1.79 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. FOR THIS...AND A WEALTH OF OTHER RIVER AND WEATHER INFORMATION... VISIT OUR WEBSITE AT WEATHER.GOV/LACROSSE
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