A warm front approaching from the south served as the focus for convection during the overnight hours. Wind damage was the primary severe weather threat, with 1 to 3 inches of heavy rain producing flooding for areas along and north of Interstate 69. A map and list of the severe weather reports are listed below.
PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 102 AM EDT WED JUN 22 2011 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0827 PM TSTM WND DMG 5 NW TEMPERANCE 41.82N 83.63W 06/21/2011 MONROE MI TRAINED SPOTTER 2 FOOT DIAMETER TREE DOWN ACROSS THE ROAD NEAR THE INTERSECTION OF RAUCH AND SECOR ROADS. 0842 PM TSTM WND DMG 4 NW ONSTED 42.05N 84.25W 06/21/2011 LENAWEE MI LAW ENFORCEMENT SEVERAL POWERLINES DOWN. 0850 PM TSTM WND DMG FREELAND 43.52N 84.12W 06/21/2011 SAGINAW MI 911 CALL CENTER SEVERAL TREES BLOW DOWN. 0920 PM TSTM WND DMG FREELAND 43.52N 84.12W 06/21/2011 SAGINAW MI TRAINED SPOTTER SEVERAL TREES DOWN IN THE NORTHERN PART OF TOWN. 0940 PM TSTM WND GST 5 SE AUBURN 43.55N 84.00W 06/21/2011 E65.00 MPH BAY MI AMATEUR RADIO MULTIPLE POWER LINES DOWN. 0943 PM TSTM WND GST OAKLEY 43.14N 84.17W 06/21/2011 E80.00 MPH SAGINAW MI AMATEUR RADIO COUNTY DISPATCH ALSO REPORTED MULTIPLE TREES DOWN THROUGHOUT SAGINAW COUNTY. 0953 PM TSTM WND DMG ESSEXVILLE 43.61N 83.84W 06/21/2011 BAY MI 911 CALL CENTER SEVERAL TREES DOWN. 1000 PM TSTM WND DMG 4 E PERRY 42.83N 84.15W 06/21/2011 SHIAWASSEE MI EMERGENCY MNGR A LARGE 20X30 FOOT SHED FLIPPED OVER, 2 MAPLE TREES 3-4 FEET IN DIAMETER BLOWN DOWN, AND VINYL SIDING BLOWN OFF A HOME. 1020 PM TSTM WND DMG 2 S SAGINAW 43.39N 83.95W 06/21/2011 SAGINAW MI AMATEUR RADIO A LARGE TREE DOWN APPROXIMATELY 10 INCHES IN DIAMETER 1040 PM MARINE TSTM WIND 12 NNW BAY PARK 43.81N 83.72W 06/21/2011 M52.00 MPH LHZ422 MI C-MAN STATION OBSERVATION FROM SAGINAW BAY LIGHT. 1045 PM FLASH FLOOD FREELAND 43.52N 84.12W 06/21/2011 SAGINAW MI 911 CALL CENTER 8200 BLOCK OF GOLDFINCH ROAD IS CLOSED DUE TO STORM DRAINS BACKING UP AND 2 FEET OF WATER ON THE ROADS. 1050 PM TSTM WND DMG 5 N ALMONT 42.99N 83.05W 06/21/2011 LAPEER MI 911 CALL CENTER TREE DOWN AT RIDER AND BOWMAN ROADS. 1053 PM TSTM WND DMG 4 SSE COLUMBIAVILLE 43.11N 83.37W 06/21/2011 LAPEER MI 911 CALL CENTER POWERLINE DOWN. 1100 PM FLASH FLOOD 3 SW FLINT 42.99N 83.75W 06/21/2011 GENESEE MI 911 CALL CENTER A COUPLE FEET OF WATER COVERING NORTHBOUND AND SOUTHBOUND I-75 BETWEEN CORUNNA ROAD AND I-69 1100 PM MARINE TSTM WIND 8 ESE AU GRES 44.02N 83.54W 06/21/2011 M47.00 MPH LHZ421 MI C-MAN STATION OBSERVATION FROM GRAVELLY SHOALS LIGHT. 1110 PM MARINE TSTM WIND 8 ESE AU GRES 44.02N 83.54W 06/21/2011 M49.00 MPH LHZ421 MI C-MAN STATION OBSERVATION FROM GRAVELLY SHOALS LIGHT. 1115 PM FLASH FLOOD EMMETT 42.99N 82.77W 06/21/2011 ST. CLAIR MI 911 CALL CENTER FLOODING OVER THE ROADWAYS. 1115 PM TSTM WND DMG FORT GRATIOT 43.01N 82.43W 06/21/2011 ST. CLAIR MI 911 CALL CENTER POWERLINES DOWN AND POWER OUTAGES IN THE AREA. 1116 PM FLASH FLOOD FREELAND 43.52N 84.12W 06/21/2011 SAGINAW MI TRAINED SPOTTER THE INTERSECTION OF CARTER AND SARLE ROADS IS IMPASSABLE WITH WATER UP TO THE BOTTOM OF DOORS. ROADWAY DITCHES NEARBY ARE CLOSE TO BEING FULL. 1120 PM TSTM WND DMG 3 E NEW BALTIMORE 42.69N 82.67W 06/21/2011 ST. CLAIR MI 911 CALL CENTER POWERLINES DOWN WITH POWER OUTAGES IN THE AREA. 1120 PM TSTM WND DMG ALGONAC 42.62N 82.53W 06/21/2011 ST. CLAIR MI 911 CALL CENTER POWERLINES DOWN. 1130 PM FLASH FLOOD 1 ESE RUBY 43.04N 82.59W 06/21/2011 ST. CLAIR MI 911 CALL CENTER FLOODING OVER THE ROADWAYS.