Several rounds of thunderstorms developed along a slow moving cold front. These thunderstorms stretched across much of southern Wisconsin into north central and central Iowa.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS ARX wrote it up.
Several rounds of thunderstorms developed along a slow moving cold front. These thunderstorms stretched across much of southern Wisconsin into north central and central Iowa. The thunderstorms tracked repeatedly over the same areas dropping several inches of rain across Fayette and Clayton counties which resulted in flooding problems on July 22nd into the 23rd.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS La Crosse, WI wrote its last area forecast discussion before the first event at Jul 22, 1:42 AM CST, 4 hours 18 minutes earlier.
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</html>The La Crosse radar (KARX), 130 km away, was scanning. The volume nearest the first event began at 12:00 UTC.
5 flood, 2 heavy rain, 1 lightning. Local standard time, as filed.
The Strawberry Point COOP observer measured 9.04 inches of rain in the 24 hour period ending at 6 a.m. CST July 23rd.
The COOP observer 1 mile east of Oelwein measured 10.15 inches of rain in the 24 hour period ending at 6 a.m. CST July 23rd.
Officers reported street flooding in the town of Monona.
The Edgewood Fire Department reported that Bear Creek had rose out of its banks and caused minor flooding.
Lightning struck a house chimney blowing bricks into the street. No fire occurred from the lightning strike.
Water from heavy rain was about a foot deep at the intersection of 10th Ave SE and Frederick in the city of Oelwein. A total of 6.23 inches of rain fell in the previous 24 hours.
Flood waters from heavy rain caused State Highways 150 and 281 to be closed on the south side of the city of Oelwein. Several other reports of city streets flooded as well as water in basements were also received.
Nearly ten inches of rain (9.93 inches) in Oelwein caused Dry Run Creek to go out of its banks.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2010Every state in 2010This day in weather historyWarnings in Iowa, July 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 246609, 246610, 246560, 246555, 247572, 246565, 246571, 246593.