A broad low pressure system touched off periods of rain with scattered thunderstorms on Monday. Many locations did not receive significant rainfall, but storms with over 1-inch-per-hour rainfall rates persisted near Rockford and Lansing, which led to higher totals. Areas near Rockford received over 2 inches of rain, and areas between Portland and Lansing received 2.5 to 4.5 inches. Moderate street flooding and ponding of water was common in Lansing. Roads in some low spots had water levels approaching the roofs of cars. US-127 near Saginaw St was shut down for hours due to deep floodwaters and clogged storm drains.

A total of 3.77 inches was measured at Capital Region International Airport, which breaks the record for the most rainfall received in a calendar day in August. The old August record was 3.39 inches set on August 27, 2013. This was also the 6th most rain received on any calendar day at Lansing. The record for rainiest calendar day is 5.47 inches on June 6, 1905.

Radar animation from 10 AM to 2 PM August 10:

Radar-estimated rainfall totals:

Below is a list of rainfall and flood reports received on August 10:

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
933 PM EDT MON AUG 10 2015

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

1213 PM     FLOOD            2 N LANSING             42.74N 84.55W
08/10/2015                   INGHAM             MI   COUNTY OFFICIAL  

            3 VEHICLES STUCK IN WATER AT SHIAWASSEE AND 
            GRAND AVE.  

1215 PM     FLOOD            1 WNW EAST LANSING      42.74N 84.51W
08/10/2015                   INGHAM             MI   COUNTY OFFICIAL  

            US 127 CLOSED DUE TO FLOODING NEAR SAGINAW 
            HWY.  

1222 PM     FLOOD            1 NW WAVERLY            42.75N 84.63W
08/10/2015                   EATON              MI   TRAINED SPOTTER  

            FLOODED INTERSECTION AT STONEY POINT DRIVE 
            AND RILEY RIDGE DR. 6-12 INCHES OF STANDING 
            WATER.  

1225 PM     HEAVY RAIN       1 S WAVERLY             42.73N 84.62W
08/10/2015  M2.94 INCH       EATON              MI   COCORAHS         

            RAINFALL DURATION 1 HOUR, 15 MINUTES. MINOR 
            FLOODING.  

1230 PM     FLOOD            1 NE LANSING            42.72N 84.54W
08/10/2015                   INGHAM             MI   BROADCAST MEDIA  

            PENNSYLVANIA AVENUE IS FLOODED IN FRONT OF 
            POTTER PARK ZOO.  

1230 PM     HAIL             1 S OKEMOS              42.69N 84.41W
08/10/2015  M0.25 INCH       INGHAM             MI   PUBLIC           

            MOST HAIL LESS THAN PEA SIZE.  

1253 PM     HEAVY RAIN       2 N EDGEMONT PARK       42.78N 84.59W
08/10/2015  M2.82 INCH       CLINTON            MI   ASOS             

            2.82 INCHES IN 2 HOURS AT CAPITAL CITY 
            AIRPORT.  

1257 PM     FLOOD            2 N LANSING             42.74N 84.55W
08/10/2015                   INGHAM             MI   PUBLIC           

            2 CARS PARTIALLY SUBMERGED NEAR SAGINAW HWY 
            AND CEDAR NEAR DOWNTOWN LANSING. 

0137 PM     HEAVY RAIN       1 W WAVERLY             42.74N 84.65W
08/10/2015  M4.00 INCH       EATON              MI   CO-OP OBSERVER   



0200 PM     HEAVY RAIN       2 N EDGEMONT PARK       42.78N 84.59W
08/10/2015  M3.77 INCH       CLINTON            MI   ASOS             

            TOTAL DAILY RAINFALL SO FAR AT CAPITAL CITY 
            AIRPORT (KLAN).  

0200 PM     HEAVY RAIN       1 SSW WAVERLY           42.72N 84.63W
08/10/2015  M3.27 INCH       EATON              MI   COCORAHS         

            RAINFALL BETWEEN 7 AM AND 1:45 PM. 
            RESIDENTIAL ROAD PONDED WATER TO TOP OF CURB 
            DURING MOST INTENSE RAINFALL. COCORAHS 
            OBSERVER LANSING 3.9 WNW /MI-ET-3/ 

0200 PM     HEAVY RAIN       3 ENE KENTWOOD          42.89N 85.54W
08/10/2015  M1.22 INCH       KENT               MI   OFFICIAL NWS OBS 

            RAINFALL TOTAL SO FAR TODAY 

0212 PM     HEAVY RAIN       1 NE LANSING            42.73N 84.54W
08/10/2015  M2.52 INCH       INGHAM             MI   AMATEUR RADIO    



0230 PM     HEAVY RAIN       4 NNW DANSVILLE         42.61N 84.34W
08/10/2015  M1.84 INCH       INGHAM             MI   COCORAHS         

            2 HOUR TOTAL. COCORAHS OBSERVER MASON 5.8 
            ENE /MI-IH-34/ 

0230 PM     HEAVY RAIN       OKEMOS                  42.71N 84.41W
08/10/2015  M3.07 INCH       INGHAM             MI   PUBLIC           

            STORM TOTAL TODAY. 0.60 INCHES ALSO FELL 
            YESTERDAY FROM AN ISOLATED THUNDERSTORM. 

0400 PM     HEAVY RAIN       SUNFIELD                42.76N 84.99W
08/10/2015  M4.10 INCH       EATON              MI   TRAINED SPOTTER  

            STORM TOTAL 

0500 PM     HEAVY RAIN       2 NW GRAND LEDGE        42.77N 84.77W
08/10/2015  M4.58 INCH       CLINTON            MI   BROADCAST MEDIA  

            STORM TOTAL