Overview
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A severe squall line tracked from the Chicago/Milwaukee areas across southern Lower Michigan. The line of storms accelerated across the state. These storms preceded extreme heat which had been in place since Tuesday. Widespread 60 to 70 mph thunderstorm wind gusts had an outsized impact on Metro Detroit and Ann Arbor. This resulted in significant tree damage with reports of trees and/or tree limbs onto homes, businesses and vehicles. An estimated 300,000 people lost power. |
Radar
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| Loop of NEXRAD Base Reflectivity Radar from 1 pm to 9 pm on July 3, 2026 - courtesy Iowa Environmental Mesonet (IEM) |
Storm Reports
Preliminary Local Storm Report...Summary
National Weather Service Detroit/Pontiac MI
149 PM EDT Sat Jul 04 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0526 PM Tstm Wnd Dmg Chelsea 42.32N 84.02W
07/03/2026 Washtenaw MI Emergency Mngr
Report of tree down on a house along with multiple
power lines down in the area
0538 PM Tstm Wnd Dmg 1 N Dexter 42.34N 83.88W
07/03/2026 Washtenaw MI Emergency Mngr
Report of multiple trees on roadway around Mast Rd and
Joy Rd
0542 PM Tstm Wnd Dmg 2 W Ann Arbor 42.28N 83.76W
07/03/2026 Washtenaw MI Public
Photo showing large tree down
0550 PM Tstm Wnd Dmg 1 NE Manchester 42.15N 84.02W
07/03/2026 Washtenaw MI Trained Spotter
Report of a tree down
0550 PM Tstm Wnd Dmg 3 S Laingsburg 42.85N 84.34W
07/03/2026 Shiawassee MI Emergency Mngr
Report of a tree down across Woodbury and Winegar with
additional report of downed trees across Laingsburg
0553 PM Tstm Wnd Gst Monroe Custer Airport 41.94N 83.43W
07/03/2026 M48 mph Monroe MI AWOS
0553 PM Tstm Wnd Dmg Britton 41.99N 83.83W
07/03/2026 Lenawee MI Trained Spotter
Photo of downed tree causing roof and car damage.
0556 PM Tstm Wnd Dmg 2 NE Ypsilanti 42.26N 83.58W
07/03/2026 Washtenaw MI Trained Spotter
Report of multiple trees down on roadway
0559 PM Tstm Wnd Gst Willow Run Airport 42.24N 83.53W
07/03/2026 M59 mph Wayne MI ASOS
0606 PM Tstm Wnd Dmg Plymouth 42.37N 83.47W
07/03/2026 Wayne MI 911 Call Center
Report of multiple trees and powerlines down across
Plymouth Twp
0607 PM Tstm Wnd Dmg 1 S Northville 42.42N 83.48W
07/03/2026 Wayne MI Trained Spotter
Large tree limbs downed blocking roadway near 5 mile
and Sheldon in Plymouth.
0617 PM Tstm Wnd Dmg 2 NW Bolles Harbor 41.89N 83.41W
07/03/2026 Monroe MI Trained Spotter
Photos of large tree limbs down estimated 8 inches in
diameter
0622 PM Tstm Wnd Dmg 1 S Cora St 42.20N 83.17W
07/03/2026 Wayne MI Trained Spotter
Numerous trees down in Wyandotte. Photo received on
social media of a large snapped tree at Oak St and 11
mile road.
0623 PM Tstm Wnd Dmg Wayne 42.28N 83.39W
07/03/2026 Wayne MI NWS Employee
Numerous large trees and wires downed across
0626 PM Tstm Wnd Gst Detroit Metro Intl Airp 42.23N 83.33W
07/03/2026 M63 mph Wayne MI ASOS
0636 PM Tstm Wnd Gst Oakland County Intl Air 42.66N 83.41W
07/03/2026 M62 mph Oakland MI ASOS
0639 PM Marine Tstm Wind Detroit River Light 42.00N 83.14W
07/03/2026 M63 mph Monroe MI Buoy
Measured at Detroit River Light
0648 PM Tstm Wnd Dmg Berkley 42.50N 83.18W
07/03/2026 Oakland MI NWS Employee
Numerous large trees downed across Berkley, some on
homes and vehicles, in addition to downed wires.
0649 PM Marine Tstm Wind Grosse Pointe YC 42.43N 82.87W
07/03/2026 M58 mph Wayne MI Mesonet
Measured at Grosse Pointe Yacht Club
0649 PM Tstm Wnd Dmg Royal Oak 42.51N 83.15W
07/03/2026 Oakland MI Trained Spotter
Numerous large trees and wires downed across Royal Oak.
0652 PM Marine Tstm Wind Peche Island Light 42.36N 82.91W
07/03/2026 M64 mph Wayne MI Buoy
Measured at Peche Island Light
0700 PM Marine Tstm Wind SC S Harbor 42.47N 82.88W
07/03/2026 M57 mph Macomb MI Mesonet
Measured at SCS Harbor
0713 PM Tstm Wnd Gst Chesterfield 42.66N 82.84W
07/03/2026 M63 mph Macomb MI Trained Spotter
Measured on a handheld anemometer
0718 PM Tstm Wnd Gst Selfridge ANGB 42.62N 82.83W
07/03/2026 M53 mph Macomb MI ASOS
0725 PM Tstm Wnd Dmg 1 W Roberts Landing 42.66N 82.53W
07/03/2026 St. Clair MI NWS Employee
Report of several large healthy tree branches down
around Algonac State Park
0754 PM Marine Tstm Wind Fort Gratiot Light 43.01N 82.42W
07/03/2026 M41 mph St. Clair MI Buoy
Measured at Fort Gratiot Light
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| NWS Detroit/Pontiac, MI Local Storm Reports (LSR) from July 3, 2026 |
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| SPC National Storm Reports from July 3, 2026 |
Photos & Video
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| Berkley, MI (Courtesy of Trained Spotter) |
Wayne, MI (Courtesy of Trained Spotter) |
Royal Oak, MI (Courtesy of Trained Spotter) |
Taylor, MI (Courtesy of Trained Spotter) |
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| Plymouth, MI (Courtesy of Trained Spotter) |
Belle Isle, MI (Courtesy of Trained Spotter) |
Environment
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| Figure 1: WPC Surface Analysis, valid 18 UTC July 3, 2026 | Figure 2: WPC Surface Analysis, valid 21 UTC July 3, 2026 | Figure 3: Mixed-Layer CAPE, valid 18 UTC July 3, 2026 |
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| Figure 4: Mixed-Layer CAPE, valid 21 UTC July 3, 2026 | Figure 5: DTX Sounding, valid 12 UTC July 3, 2026 | Figure 6: SPC Categorical Severe Weather Outlook, valid 20 UTC July 3, 2026 |
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| Figure 7: SPC Mesoscale Discussion #1474, valid 1942 UTC July 3, 2026 | Figure 8: Severe Thunderstorm Watch #447, valid 1841 UTC July 3, 2026 |
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