Preliminary Flash Flood Event Summary for July 5, 2024

Overview

An area of low pressure slowly tracked east across east-central
Wisconsin to central Lake Michigan through the day on July 5, 2024. Showers and thunderstorms developed shortly after daybreak and then became more concentrated during the mid-morning into the early afternoon. Particularly, a cluster of showers and storms became slow moving over Waupaca County during this time, resulting in 4 to 6 inches of rain. The area of heaviest rain slowly tracked east into the Fox Valley, where 1 to 4 inches of rain fell across parts of Outagamie, Brown, Calumet, Kewaunee, and Manitowoc counties.

The city of Manawa measured around 5.7 inches of rain. This rain, coupled with the impacts from around 6 inches of recent rain from the two weeks prior, led to the failure of the Manawa Dam, as water overtopped the dam around 1230 pm. This led to evacuations of residences and businesses in Manawa and downstream of the dam into the town of Royalton. Additionally, several water rescues of people trapped in vehicles were made during the morning, especially in Manawa and Appleton. A Boil Water advisory was also issued for Manawa and surrounding areas.

Please see the tabs below for more information.

24- Hour Rainfall Estimate for July 5, 2024

Radar Loop from 8am to 2pm on July 5, 2024

Radar Loop from 8:46 to 11:03am on July 5, 2024

Rain Maps / Reports
Rivers
Photos

Rain Maps / Reports

1 - Hour Rainfall Running Total Estimate for July 5, 2024

24 - Hour Rainfall Estimate for July 5, 2024

 ...24-HOUR PRECIPITATION REPORTS ON JULY 5, 2024...

Location                     Amount    Time/Date       Lat/Lon              

...Wisconsin...

...Brown County...
Wrightstown                  0.83 in   0706 AM 07/06   44.33N/88.17W        
De Pere                      0.68 in   0700 AM 07/06   44.37N/88.07W        
Denmark WWTP                 0.55 in   0800 AM 07/06   44.35N/87.81W        

...Calumet County...
New Holstein 1 W             2.11 in   0710 AM 07/06   43.95N/88.10W        
Brillion 4.9 S               1.16 in   0700 AM 07/06   44.11N/88.05W        
Chilton 0.5 E                0.60 in   0700 AM 07/06   44.03N/88.15W        

...Door County...
Ephraim 0.2 WSW              0.68 in   0700 AM 07/06   45.16N/87.17W        
Fish Creek 1 E WWTP          0.61 in   0625 AM 07/06   45.12N/87.23W        
Ephraim Airport              0.60 in   0655 AM 07/06   45.13N/87.18W        

...Langlade County...
White Lake 1.4 SE            1.24 in   0800 AM 07/06   45.15N/88.74W        

...Manitowoc County...
Reedsville                   1.41 in   0700 AM 07/06   44.23N/87.96W        
Millhome 2 E                 1.28 in   0709 AM 07/06   43.90N/87.91W        
Valders 3.3 WSW              0.58 in   0700 AM 07/06   44.04N/87.94W        

...Marathon County...
Stratford 4 W                0.78 in   0705 AM 07/06   44.81N/90.17W        

...Marinette County...
Peshtigo 1 S                 1.09 in   0730 AM 07/06   45.03N/87.74W        

...Outagamie County...
2 W Appleton                 2.50 in   0530 PM 07/05   44.26N/88.43W        
New London 2 SE              2.50 in   0630 AM 07/06   44.36N/88.72W        
Appleton 1.3 NW              2.30 in   0700 AM 07/06   44.28N/88.41W        
Mackville 2 S                2.09 in   0600 AM 07/06   44.31N/88.41W        
New London 3.3 NE            1.80 in   0740 AM 07/06   44.43N/88.70W        
Appleton 2.3 NW              1.74 in   0600 AM 07/06   44.29N/88.43W        
Grand Chute                  1.39 in   0710 AM 07/06   44.31N/88.42W        
Shiocton 0.6 NW              1.27 in   0730 AM 07/06   44.44N/88.58W        
Black Creek 3 NW             1.10 in   0700 AM 07/06   44.50N/88.47W        
New London 4.1 N             0.99 in   0600 AM 07/06   44.45N/88.73W        
Seymour                      0.72 in   0710 AM 07/06   44.54N/88.25W        

...Portage County...
Stevens Point                0.64 in   0530 AM 07/06   44.51N/89.59W        
Plover 1.8 W                 0.55 in   0700 AM 07/06   44.46N/89.58W        

...Shawano County...
Shawano 2 SSW                0.54 in   0800 AM 07/06   44.76N/88.62W        

...Waupaca County...
Ogdensburg 2 E               5.05 in   0700 AM 07/06   44.46N/88.98W        
1 WNW Waupaca                3.65 in   1259 PM 07/05   44.34N/89.08W        
Waupaca 1 E                  2.45 in   0600 AM 07/06   44.35N/89.06W        
Waupaca                      2.21 in   0707 AM 07/06   44.34N/89.11W        
New London - WWTP            1.70 in   0700 AM 07/06   44.39N/88.75W        
Waupaca 7.6 SW               1.63 in   0600 AM 07/06   44.27N/89.17W        
Clintonville 0.7 WNW         0.72 in   0600 AM 07/06   44.63N/88.76W        
Clintonville 0.9 N           0.68 in   0700 AM 07/06   44.62N/88.75W        
Fremont                      0.63 in   0705 AM 07/06   44.28N/88.82W        
Clintonville Airport         0.58 in   0655 AM 07/06   44.62N/88.73W        

...Waushara County...
Hancock 1.5 SW               0.51 in   0700 AM 07/06   44.12N/89.54W        

...Winnebago County...
Menasha 1.5 W                1.32 in   0800 AM 07/06   44.20N/88.47W        
      
Zittau                       0.52 in   0600 AM 07/06   44.22N/88.78W        

...Wood County...
New Rome 3 WNW               1.26 in   0700 AM 07/06   44.26N/89.94W        
New Rome 1 WNW               0.96 in   0700 AM 07/06   44.25N/89.91W        
New Rome 4 ENE               0.54 in   0705 AM 07/06   44.26N/89.81W        

Observations are collected from a variety of sources with varying
equipment and exposures. We thank all volunteer weather observers 
for their dedication. Not all data listed are considered official.

Rivers

The heaviest rain was rather localized, which helped reduce the river flooding across the area. However, a few locations near where the heaviest rainfall occurred did see a rise in river levels, with flooding observed on the Little Wolf River. The dam failure in Manawa also contributed to this flooding. Some water rises were also observed on the East River.