Severe Thunderstorm Summary 6-10-2020

Photos

Saginaw Credit: Brad Sugden	Saginaw County Credit: Chris Easlick	Saginaw County Credit: Chris Easlick
Elkton Credit: Michelle McArdle	Oakland Township Credit: Ben Redmon	Onsted Credit: Ryan Harriott
Chelsea Credit: Bill Rapai	Novi Credit: Nick Dewhirst	Detroit Credit: Mike Taylor

Radar

Click to Enlarge Radar loop courtesy of Iowa Environmental Mesonet (IEM)

Storm Reports

Map of severe weather reports, with wind reports as blue circles and hail reports as green circles.

Severe Weather Local Storm Reports:

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1213 PM EDT THU JUN 11 2020

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

0106 PM     TSTM WND DMG     SHIELDS                 43.42N 84.07W 
06/10/2020                   SAGINAW            MI   BROADCAST MEDIA 

            LINE OF SEVERAL DOWNED TREES

0107 PM     TSTM WND DMG     4 WNW ST. CHARLES       43.32N 84.23W 
06/10/2020                   SAGINAW            MI   TRAINED SPOTTER 

            BARN DAMAGED WITH MULTIPLE POLES AND WIRES DOWN.

0107 PM     TSTM WND DMG     5 E MERRILL             43.42N 84.23W 
06/10/2020                   SAGINAW            MI   PUBLIC          

            WINDS KNOCKED DOWN SEVEN LARGE TREES. THREE OF THEM FELL 
            ON A HOME. TIME ESTIMATED BASED ON RADAR. 

0109 PM     TSTM WND DMG     NE SHIELDS              43.42N 84.07W 
06/10/2020                   SAGINAW            MI   TRAINED SPOTTER 

            TREE DOWN AND POWER LINES DOWN ON A BACK PORCH ALONG N 
            MILLER RD. REPORTS OF ANOTHER TREE DOWN ON MILLER RD 
            BLOCKING BOTH DIRECTIONS.

0113 PM     TSTM WND GST     NNW SAGINAW             43.43N 83.95W 
06/10/2020  M63.00 MPH       SAGINAW            MI   PUBLIC          

            WIND GUSTS MEASURED ON A PERSONAL WEATHER STATION IN 
            DOWNTOWN SAGINAW. 

0114 PM     TSTM WND DMG     1 S MIDLAND             43.61N 84.23W 
06/10/2020                   MIDLAND            MI   TRAINED SPOTTER 

            SPOTTER REPORTED 8 INCH DIAMETER TREE BLOWN DOWN AND 
            NUMEROUS SMALL BRANCHES DOWN. 

0115 PM     TSTM WND DMG     4 WNW SAGINAW           43.45N 84.02W 
06/10/2020                   SAGINAW            MI   TRAINED SPOTTER 

            MULTIPLE REPORTS AND PICTURES OF LARGE TREES DOWN IN 
            SAGINAW TOWNSHIP.

0116 PM     TSTM WND DMG     2 SW SAGINAW            43.40N 83.98W 
06/10/2020                   SAGINAW            MI   TRAINED SPOTTER 

            NUMEROUS TREES WERE BLOWN DOWN AND THERE WAS A REPORT OF 
            A ROOF BLOWN OFF OF A HOME. 

0118 PM     TSTM WND GST     5 S AUBURN              43.53N 84.08W 
06/10/2020  M69.00 MPH       SAGINAW            MI   ASOS            

            KMBS ASOS MEASURED WIND GUST OF 60 KNOTS. 

0120 PM     TSTM WND DMG     2 NE SAGINAW            43.44N 83.92W 
06/10/2020                   SAGINAW            MI   EMERGENCY MNGR  

            *** 1 INJ *** A PERSON WAS INJURED WHEN A TREE FELL ON 
            THEIR CAR IN THE CITY OF SAGINAW

0126 PM     TSTM WND DMG     4 NNW AUBURN            43.65N 84.11W 
06/10/2020                   BAY                MI   TRAINED SPOTTER 

            REPORTS OF WIRES DOWN CAUSING A GRASS FIRE NEAR 11 MILE 
            AND TOWNLINE 14TH ROAD.

0130 PM     TSTM WND DMG     2 SSE LINWOOD           43.71N 83.97W 
06/10/2020                   BAY                MI   TRAINED SPOTTER 

            MULTIPLE REPORTS OF TREES AND WIRES DOWN ALONG ROUTE 13 
            NEAR PARISH RD.

0140 PM     TSTM WND GST     13 NNW BAY PARK         43.81N 83.72W 
06/10/2020  M54.00 MPH       LHZ422             MI   BUOY            

            SUSTAINED WIND AT SAGINAW BAY LIGHT 1. STATION HAS 
            STOPPED REPORTING GUSTS. 

0140 PM     TSTM WND DMG     2 NE PINCONNING         43.88N 83.94W 
06/10/2020                   BAY                MI   PUBLIC          

            REPORT OF TREES KNOCKED DOWN ON ROADWAY NEAR E CODY ESTEY
            ROAD. TIME ESTIMATED BASED ON RADAR.

0157 PM     TSTM WND DMG     1 SSW SEBEWAING         43.72N 83.46W 
06/10/2020                   HURON              MI   TRAINED SPOTTER 

            TREES DOWN ALONG LIKEN RD BETWEEN MYERS RD AND BAY ST.

0157 PM     TSTM WND DMG     SEBEWAING               43.73N 83.45W 
06/10/2020                   HURON              MI   TRAINED SPOTTER 

            MULTIPLE REPORTS OF POWER LINES DOWN ON ROADS AND 
            BUILDINGS ACROSS SEBEWAING.

0200 PM     TSTM WND GST     8 ESE AU GRES           44.02N 83.54W 
06/10/2020  M48.00 MPH       LHZ421             MI   BUOY            

            SUSTAINED WIND OF 42KTS AT GRAVELLY SHOAL LIGHT. STATION 
            STOPPED REPORTING GUSTS.

0209 PM     TSTM WND DMG     N PIGEON                43.84N 83.27W 
06/10/2020                   HURON              MI   TRAINED SPOTTER 

            POWER POLES AND WIRES DOWN ON RAILROAD TRACKS ALONG BERNE
            STREET

0210 PM     TSTM WND DMG     ELKTON                  43.82N 83.18W 
06/10/2020                   HURON              MI   BROADCAST MEDIA 

            PICTURES OF BARN THAT COLLAPSED IN THE ELKTON AREA.

0220 PM     TSTM WND GST     18 ENE TURNER           44.25N 83.46W 
06/10/2020  M66.00 MPH       LHZ349             MI   BUOY            

            TAWAS POINT STATION MEASURED WIND GUST. 

0230 PM     TSTM WND DMG     BAY CITY                43.59N 83.89W 
06/10/2020                   BAY                MI   PUBLIC          

            SEVERAL REPORTS OF TREE DAMAGE IN BAY CITY. ONE REPORT 
            ALONG MIDLAND ROAD AND ANOTHER AT LINCOLN AND 13TH 
            STREET. 

0231 PM     TSTM WND DMG     2 N PINNEBOG            43.96N 83.10W 
06/10/2020                   HURON              MI   PUBLIC          

            PICTURES OF POWER POLES SNAPPED.

0243 PM     TSTM WND DMG     1 WNW SWAN CREEK        43.39N 84.11W 
06/10/2020                   SAGINAW            MI   TRAINED SPOTTER 

            LIVE WIRES DOWN ALONG LAKEWOOD DRIVE.

0246 PM     TSTM WND DMG     3 W SHIELDS             43.42N 84.13W 
06/10/2020                   SAGINAW            MI   TRAINED SPOTTER 

            MULTIPLE REPORTS OF TREES AND WIRES DOWN BETWEEN THOMAS 
            AND HEMLOCK ROADS.

0300 PM     FLOOD            3 E SAGINAW             43.42N 83.89W 
06/10/2020                   SAGINAW            MI   BROADCAST MEDIA 

            VIDEO OF FLOODING ON SOUTHBOUND I-75.

0303 PM     MARINE TSTM WIND 2 ESE HURON CITY        44.02N 82.80W 
06/10/2020  M40.00 MPH       HURON              MI   BUOY            

            34KT GUST AT PORT HOPE.

0304 PM     TSTM WND DMG     2 WNW SHIELDS           43.43N 84.11W 
06/10/2020                   SAGINAW            MI   TRAINED SPOTTER 

            DOZENS OF REPORTS OF TREES DOWN ACROSS SAGINAW COUNTY, 
            PARTICULARLY AROUND THOMAS TWP.

0322 PM     TSTM WND DMG     2 S HURON CITY          44.00N 82.83W 
06/10/2020                   HURON              MI   911 CALL CENTER 

            DISPATCH REPORTS A FEW SPROADIC TREES DOWN ACROSS EASTERN
            HURON COUNTY.

0345 PM     TSTM WND DMG     SAGINAW                 43.42N 83.95W 
06/10/2020                   SAGINAW            MI   TRAINED SPOTTER 

            MORE REPORTS OF TREES DOWN ON CARS AND BUILDINGS AROUND 
            THE CITY OF SAGINAW.

0347 PM     TSTM WND DMG     1 S FLUSHING            43.06N 83.84W 
06/10/2020                   GENESEE            MI   TRAINED SPOTTER 

            TREE DOWN ON HOUSE CAUSING HOUSE FIRE.

0350 PM     TSTM WND DMG     3 NNW FLINT             43.06N 83.72W 
06/10/2020                   GENESEE            MI   TRAINED SPOTTER 

            POWER LINES DOWN ALONG ROSELAWN DRIVE.

0350 PM     TSTM WND DMG     4 SSE BROOKLYN          42.05N 84.21W 
06/10/2020                   LENAWEE            MI   911 CALL CENTER 

            NUMEROUS TREES REPORTED DOWN ACROSS THE AREA WITH 
            WIDESPREAD POWER OUTAGES ALSO REPORTED.

0353 PM     TSTM WND DMG     2 N FENTON              42.83N 83.72W 
06/10/2020                   GENESEE            MI   TRAINED SPOTTER 

            LARGE TREE DOWN ALONG LAKESHORE DRIVE.

0354 PM     TSTM WND DMG     MOUNT MORRIS            43.12N 83.70W 
06/10/2020                   GENESEE            MI   TRAINED SPOTTER 

            A TREE FELL ON A HOUSE FROM A MEASURED WIND GUST OF 57 
            MPH.

0356 PM     TSTM WND DMG     1 SE CHELSEA            42.30N 84.01W 
06/10/2020                   WASHTENAW          MI   PUBLIC          

            PICTURE OF LARGE TREE DOWN ON A CAR.

0400 PM     FLOOD            SAGINAW                 43.42N 83.95W 
06/10/2020                   SAGINAW            MI   LAW ENFORCEMENT 

            MSP BAY REGION REPORTED I-75 BETWEEN M-46 AND M-81 ARE 
            CLOSED DUE TO FLOODING. 

0400 PM     TSTM WND DMG     5 SSE CLIO              43.12N 83.69W 
06/10/2020                   GENESEE            MI   EMERGENCY MNGR  

            TREE DOWN ON HOUSE IN MT MORRIS.

0407 PM     TSTM WND DMG     5 SSE BRIGHTON          42.47N 83.75W 
06/10/2020                   LIVINGSTON         MI   TRAINED SPOTTER 

            TREE DOWN BLOCKING PART OF SILVER LAKE RD.

0420 PM     TSTM WND DMG     BRIGHTON                42.53N 83.78W 
06/10/2020                   LIVINGSTON         MI   TRAINED SPOTTER 

            SPOTTER REPORTED NUMEROUS SIX INCH DIAMETER TREE BRANCHES
            DOWN. 

0424 PM     TSTM WND DMG     2 E NORTH BRANCH        43.23N 83.16W 
06/10/2020                   LAPEER             MI   TRAINED SPOTTER 

            TREE DOWN ON LIVE WIRES AT CEDAR CREEK AND NORTH BRANCH 
            ROADS.

0426 PM     TSTM WND DMG     ATTICA                  43.03N 83.16W 
06/10/2020                   LAPEER             MI   TRAINED SPOTTER 

            TREE DOWN ON POWER POLE WITH LIVE WIRES DOWN NEAR NORTH 
            YOUNGS RD.

0436 PM     TSTM WND DMG     5 SSE OXFORD            42.75N 83.20W 
06/10/2020                   OAKLAND            MI   TRAINED SPOTTER 

            PICTURES OF MULTIPLE TREES DOWN AROUND ADAMS AND ORION 
            ROADS.

0436 PM     TSTM WND DMG     3 ESE CLARKSTON         42.72N 83.36W 
06/10/2020                   OAKLAND            MI   PUBLIC          

            LARGE TREE LIMB DOWN AT THE INTERSECTION OF GRIGGS DRIVE 
            ADN MARY SUE ST. 

0437 PM     TSTM WND DMG     2 SE LAKEVILLE          42.80N 83.12W 
06/10/2020                   OAKLAND            MI   TRAINED SPOTTER 

            LARGE TREE DOWN OVER 32 MILE ROAD JUST WEST OF TOWNSEND 
            ROAD. TIME ESTIMATED BASED ON RADAR.

0445 PM     TSTM WND DMG     4 S ALMONT              42.86N 83.03W 
06/10/2020                   MACOMB             MI   911 CALL CENTER 

            DISPATCH REPORTS TREE DOWN IN BRUCE TWP.

0445 PM     TSTM WND DMG     ROMEO                   42.80N 83.01W 
06/10/2020                   MACOMB             MI   LAW ENFORCEMENT 

            ROMEO POLICE DEPARTMENT REPORTS WIRES DOWN IN TOWN.

0447 PM     TSTM WND DMG     6 W PECK                43.26N 82.94W 
06/10/2020                   SANILAC            MI   PUBLIC          

            PICTURES OF CHURCH ROOF PARTIALLY PEELED OFF ALONG WITH A
            COUPLE OF TREES SNAPPED.

0448 PM     TSTM WND DMG     3 SW DRYDEN             42.92N 83.16W 
06/10/2020                   LAPEER             MI   TRAINED SPOTTER 

            POWER LINES DOWN WITH A POWER POLE ON FIRE.

0455 PM     TSTM WND DMG     ROME CENTER             41.94N 84.19W 
06/10/2020                   LENAWEE            MI   TRAINED SPOTTER 

            NUMEROUS TREES DOWN WITH SEVERAL POWER OUTAGES REPORTED 
            BY LOCAL SPOTTERS IN THE TOWN. 

0501 PM     TSTM WND DMG     2 ESE NOVI              42.47N 83.46W 
06/10/2020                   OAKLAND            MI   TRAINED SPOTTER 

            LARGE TREE UPROOTED NEAR PEACHTREE PLAZA

0508 PM     TSTM WND DMG     MANCHESTER              42.15N 84.04W 
06/10/2020                   WASHTENAW          MI   TRAINED SPOTTER 

            14 INCH DIAMETER TREE BLOWN OVER. POWER LINES DOWN WITH 
            POWER POLE SNAPPED.

0510 PM     MARINE TSTM WIND 1 SSE PORT SANILAC      43.42N 82.54W 
06/10/2020  M40.00 MPH       SANILAC            MI   BUOY            

            34KT GUST AT PORT SANILAC.

0515 PM     HEAVY RAIN       5 WSW CHESANING         43.17N 84.21W 
06/10/2020  M1.50 INCH       SAGINAW            MI   TRAINED SPOTTER 

            3 HOUR RAINFALL TOTAL.

0517 PM     HEAVY RAIN       BURTON                  43.00N 83.62W 
06/10/2020  M1.00 INCH       GENESEE            MI   CO-OP OBSERVER  

0519 PM     TSTM WND DMG     4 SSW SALINE            42.13N 83.80W 
06/10/2020                   WASHTENAW          MI   PUBLIC          

            PICTURE OF TREE DOWN ACROSS JORDAN RD BLOCKING MOST OF 
            THE ROAD.

0519 PM     TSTM WND GST     ANN ARBOR               42.28N 83.73W 
06/10/2020  M61.00 MPH       WASHTENAW          MI   OFFICIAL NWS OBS

            ASOS PEAK WIND GUST MEASURED AT ANN ARBOR MUNICIPAL 
            AIRPORT. 

0521 PM     TSTM WND DMG     1 SSE ANN ARBOR         42.26N 83.72W 
06/10/2020                   WASHTENAW          MI   TRAINED SPOTTER 

            LARGE TREE DOWN BLOCKING WESTBOUND LANES AT STADIUM AND 
            BROCKMAN BLVDS.

0526 PM     TSTM WND DMG     2 S GROSSE ILE          42.10N 83.15W 
06/10/2020                   WAYNE              MI   PUBLIC          

            LARGE TREE FELL ON A HOUSE WITH SEVERAL OTHER TREES DOWN 
            ON THE SOUTH END OF ELBA ISLAND. TIME ESTIMATED BASED ON 
            RADAR. 

0549 PM     HAIL             DETROIT                 42.38N 83.11W 
06/10/2020  M1.00 INCH       WAYNE              MI   BROADCAST MEDIA 

            PICTURE OF QUARTER-SIZED HAIL IN DOWNTOWN DETROIT.

0605 PM     HEAVY RAIN       2 NE AUBURN             43.62N 84.05W 
06/10/2020  M1.54 INCH       BAY                MI   TRAINED SPOTTER 

            5 HOUR RAINFALL TOTAL

0615 PM     HEAVY RAIN       2 W SAGINAW             43.42N 83.99W 
06/10/2020  M1.32 INCH       SAGINAW            MI   PUBLIC          

            5 HOUR STORM TOTAL RAINFALL

0622 PM     TSTM WND DMG     5 N ALGONAC             42.70N 82.54W 
06/10/2020                   ST. CLAIR          MI   911 CALL CENTER 

            DISPATCH REPORTS TREE DOWN SOUTHWEST OF MARINE CITY.

0625 PM     HAIL             3 NNW NEW BALTIMORE     42.72N 82.76W 
06/10/2020  M1.00 INCH       MACOMB             MI   TRAINED SPOTTER 

            QUARTER-SIZED HAIL NEAR 26 MILE AND I-94.

0642 PM     TSTM WND GST     GROSSE POINTE WOODS     42.44N 82.90W 
06/10/2020  E60.00 MPH       WAYNE              MI   TRAINED SPOTTER 

            A LARGE TREE WAS BLOWN DOWN AND SEVERAL TREE BRANCHES 
            WERE BLOWN DOWN. 

0650 PM     TSTM WND GST     2 SSE ST. CLAIR SHORES  42.47N 82.88W 
06/10/2020  M43.00 MPH       MACOMB             MI   C-MAN STATION   

            37KT GUST AT ST CLAIR SHORES.

0653 PM     MARINE TSTM WIND 5 ESE MOUNT CLEMENS     42.57N 82.80W 
06/10/2020  M40.00 MPH       LCZ460             MI   C-MAN STATION   

            35KT GUST AT LAKE ST CLAIR METROPARK.

0657 PM     TSTM WND GST     3 E MOUNT CLEMENS       42.60N 82.83W 
06/10/2020  M40.00 MPH       MACOMB             MI   ASOS            

            34KT GUST AT SELFRIDGE AIR BASE KMTC.

0800 AM     HEAVY RAIN       8 NW SAGINAW            43.50N 84.06W 
06/11/2020  M2.10 INCH       SAGINAW            MI   CO-OP OBSERVER  

            24 HOUR STORM TOTAL RAINFALL. RAIN FELL MAINLY BETWEEN 1 
            PM AND 6 PM.

National Storm Reports (for June 10, 2020):

Environment

The remnants of Tropical Storm Cristobal tracked from the Gulf Coast of Louisiana up the Mississippi River Valley, reaching the western Great Lakes on the evening of June 9. Scattered showers and storms moved through southeast Michigan late that evening as a warm front associated with the post-tropical system lifted through. These storms remained sub-severe, however the warm and moist air mass that moved in helped set the stage for a widespread severe weather event on June 10.

Dew points reached the lower 70s across southeast Michigan by the early morning on June 10. Temperatures rose into the upper 80s to lower 90s by early afternoon while winds became gusty (30-35 mph) due to an increased pressure gradient in the wake of the departing tropical remnants which were located over central Ontario by the afternoon (see Figure 2 below). An upper trough was positioned over the upper midwest that afternoon while a potent shortwave rotated around it and took on a negative tilt as it reached the Great Lakes. Jet stream energy around this feature led to increased effective wind shear to 40+ kt by the early afternoon (Figure 8). Midlevel warm air was initially in place during the morning, but the shortwave helped erode this cap which opened the door for convection to develop. With the warm and moist air at the surface and cool and dry air aloft, instability was high with 3000 J/kg of surface-based CAPE observed in the 18z special weather balloon sounding (Figure 5). A strong wind field was noted throughout the atmospheric column as well with southwest winds over 50 kt through the 700-500mb layer. Precipitable water came in at 1.66 inches which indicated potential for heavy downpours with any storms.

Storms developed over northern Indiana and southwest Lower Michigan during the late morning along a surface trough/convergence axis ahead of the cold front set to sweep through later in the afternoon/evening. These storms raced northeastward at roughly 50 mph and reached the Saginaw Valley region by early afternoon, taking on a bowing structure and causing widespread wind damage across this area. Widespread power outages resulted from these storms, and a gust as high as 69 mph was measured at MBS International Airport in Freeland. One person was injured when a tree fell on their car in Saginaw.

Shortly after, storms began to fill in across the rest of central Lower Michigan and progress eastward through the rest of the afternoon. Wind damage reports were very common across the area with numerous trees downed and several instances of roof damage. Over 450,000 customers lost power across the state due to the storms. While damaging wind was the main hazard, severe hail occurred with a few storms including one over downtown Detroit. Localized flooding also occurred as storms trained over certain areas for extended periods of time, including Saginaw where a portion of I-75 was closed due to flooding. Rainfall amounts were generally 1 to 1.5 inches, though some localized areas near Saginaw likely saw closer to 2 inches.

Click on the images below to see them expanded.

Figure 1: Weather Prediction Center (WPC) surface map, valid 12 UTC 10 June 2020.	Figure 2: WPC surface map, valid 18 UTC 10 June 2020.	Figure 3: WPC surface map, valid 00 UTC 11 June 2020.
Figure 4: KDTX observed sounding, valid 12 UTC 10 June 2020.	Figure 5: KDTX observed sounding, valid 18 UTC 10 June 2020.	Figure 6: KDTX observed sounding, valid 00 UTC 11 June 2020.
Figure 7: Storm Prediction Center (SPC) Day 1 Convective Outlook, valid 12 UTC 10 June to 12 UTC 11 June 2020.	Figure 8: Loop of effective bulk shear, valid 12 UTC 10 June 2020 to 00 UTC 11 June 2020.	Figure 9: Loop of surface-based CAPE, valid 12 UTC 10 June 2020 to 00 UTC 11 June 2020.