August 29, 2022 Severe Weather Summary

Photos

Ann Arbor, MI Credit: Johnny DelPizzo	Clawson, MI Credit: Ryan Jake Jakubowski	Royal Oak, MI Credit: Ryan Jake Jakubowski
Highland, MI Credit: James Brennan	Highland, MI Credit: James Brennan	Highland, MI Credit: James Brennan
Wolverine Lake, MI Credit: Nolan Waters	Pinckney, MI Credit: Jeff Sly	Putnam/Marion Twp, MI Credit: Janell O'Keefe
Grosse Pointe Shores, MI Credit: Michael Meredith	Waterford, MI Credit: Susan Daly	Monroe, MI Credit: Mike Frey

Radar

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

Storm Reports

Severe Weather Local Storm Reports:

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
928 AM EDT TUE AUG 30 2022

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

0431 PM     TSTM WND DMG     3 WNW GORDONVILLE       43.58N 84.43W
08/29/2022                   MIDLAND            MI   911 CALL CENTER

            MULTIPLE LARGE TREES AND POWER LINES DOWN ACROSS MIDLAND
            COUNTY. DISPATCH RECEIVED NUMEROUS REPORTS AT THE
            INTERSECTION OF 9 MILE RD AND STEWART RD.

0435 PM     HAIL             SANFORD                 43.68N 84.38W
08/29/2022  M1.00 INCH       MIDLAND            MI   TRAINED SPOTTER

0453 PM     TSTM WND GST     5 S AUBURN              43.53N 84.08W
08/29/2022  M58.00 MPH       SAGINAW            MI   ASOS

            MEASURED AT KMBS TRI-CITIES AIRPORT.

0521 PM     TSTM WND DMG     2 ENE HOWELL            42.62N 83.90W
08/29/2022                   LIVINGSTON         MI   NWS EMPLOYEE

            LARGE LIMBS DOWNED.

0523 PM     TSTM WND DMG     PINCKNEY                42.45N 83.95W
08/29/2022                   LIVINGSTON         MI   PUBLIC

            SOCIAL MEDIA PHOTOS OF SEVERAL LARGE TREES DOWNED AROUND
            PINCKNEY.

0524 PM     TSTM WND DMG     ONSTED                  42.01N 84.19W
08/29/2022                   LENAWEE            MI   LAW ENFORCEMENT

            LENAWEE COUNTY CENTRAL DISPATCH REPORTED NUMEROUS TREES
            AND POWER LINES DOWN THROUGHOUT CAMBRIDGE TOWNSHIP. THERE
            WAS ALSO A REPORT OF ROOF DAMAGE TO A HOME.

0529 PM     TSTM WND DMG     FENTON                  42.80N 83.71W
08/29/2022                   GENESEE            MI   TRAINED SPOTTER

            TREE DOWNED AND LARGE LIMBS DOWNED.

0535 PM     TSTM WND DMG     MILLINGTON              43.28N 83.53W
08/29/2022                   TUSCOLA            MI   LAW ENFORCEMENT

            TUSOLA COUNTY CENTRAL DISPATCH REPORTED NUMEROUS TREES
            AND POWER LINES DOWN IN AND AROUND MILLINGTON.

0544 PM     TSTM WND GST     4 E WHITE LAKE          42.65N 83.43W
08/29/2022  M58.00 MPH       OAKLAND            MI   OFFICIAL NWS OBS

            MEASURED AT NWS WHITE LAKE.

0545 PM     TSTM WND DMG     5 N MILFORD             42.66N 83.60W
08/29/2022                   OAKLAND            MI   TRAINED SPOTTER

            SEVERAL LARGE TREES DOWN ACROSS WARDLOW RD.

0545 PM     TSTM WND DMG     1 S WALLED LAKE         42.52N 83.48W
08/29/2022                   OAKLAND            MI   TRAINED SPOTTER

            LARGE BRANCH DOWNED AND WIRES DOWNED NEAR WALLED LAKE DR
            AND PONTIAC TRAIL.

0547 PM     TSTM WND GST     2 W LAPEER              43.05N 83.36W
08/29/2022  M74.00 MPH       LAPEER             MI   TRAINED SPOTTER

            UPDATED REPORT. PEAK MEASURED GUST 74 MPH AND 130 FT PINE
            TREE SNAPPED.

0547 PM     TSTM WND GST     2 W LAPEER              43.05N 83.36W
08/29/2022  M58.00 MPH       LAPEER             MI   TRAINED SPOTTER

            MEASURED GUST AND 130 FT PINE TREE SNAPPED.

0552 PM     TSTM WND DMG     1 WNW MARLETTE          43.33N 83.10W
08/29/2022                   SANILAC            MI   TRAINED SPOTTER

            NUMEROUS LARGE TREE BRANCHES GREATER THAN 12 INCHES DOWN
            ACROSS CITY OF MARLETTE.

0554 PM     TSTM WND GST     5 SSW CANTON            42.24N 83.52W
08/29/2022  M60.00 MPH       WAYNE              MI   ASOS

            MEASURED AT KYIP WILLOW RUN AIRPORT.

0602 PM     TSTM WND DMG     BAD AXE                 43.80N 83.00W
08/29/2022                   HURON              MI   TRAINED SPOTTER

            LARGE TREE DOWNED - TIME ESTIMATED VIA RADAR.

0605 PM     TSTM WND GST     2 ENE ROMULUS           42.23N 83.33W
08/29/2022  M58.00 MPH       WAYNE              MI   ASOS

            MEASURED AT KDTW DETROIT METRO AIRPORT.

0606 PM     TSTM WND DMG     TAYLOR                  42.23N 83.27W
08/29/2022                   WAYNE              MI   TRAINED SPOTTER

            6 TO 12 INCH DIAMETER BRANCHES DOWNED.

0608 PM     TSTM WND DMG     NW ROCHESTER            42.69N 83.13W
08/29/2022                   OAKLAND            MI   TRAINED SPOTTER

            SEVERAL LARGE BRANCHES ESTIMATED 8 INCHES IN DIAMETER
            DOWNED.

0612 PM     TSTM WND GST     3 WNW MONROE            41.93N 83.44W
08/29/2022  M64.00 MPH       MONROE             MI   ASOS

            MEASURED AT KTTF MONROE CUSTER AIRPORT.

0615 PM     TSTM WND GST     6 ENE DETROIT           42.41N 83.01W
08/29/2022  M70.00 MPH       WAYNE              MI   ASOS

            MEASURED AT KDET DETROIT CITY AIRPORT.

0615 PM     TSTM WND DMG     MONROE                  41.92N 83.39W
08/29/2022                   MONROE             MI   TRAINED SPOTTER

            1 FOOT DIAMETER BRANCH DOWNED ON PICKUP TRUCK CAB.

0620 PM     TSTM WND DMG     5 S MOUNT CLEMENS       42.52N 82.90W
08/29/2022                   MACOMB             MI   PUBLIC

            PHOTO RELAYED VIA SOCIAL MEDIA OF LARGE TREE BRANCH
            DOWNED ACROSS ROAD.

0623 PM     TSTM WND DMG     2 S MACOMB TOWNSHIP     42.64N 82.92W
08/29/2022                   MACOMB             MI   TRAINED SPOTTER

            MULTIPLE LARGE DIAMETER TREES ALONG HEYDENREICH RD SOUTH
            OF 21 MILE PLUS WIRES DOWNED BY FALLEN TREES.

0623 PM     TSTM WND DMG     ARMADA                  42.84N 82.88W
08/29/2022                   MACOMB             MI   TRAINED SPOTTER

            LARGE TREES BLOCKING A PORTION OF NORTH AVE. ROOF DAMAGE
            ALSO NOTED.

0629 PM     TSTM WND GST     5 E CROSWELL            43.27N 82.52W
08/29/2022  M58.00 MPH       LHZ443             MI   C-MAN STATION

0630 PM     TSTM WND DMG     3 W MONROE              41.92N 83.45W
08/29/2022                   MONROE             MI   PUBLIC

            SOCIAL MEDIA PHOTO SHOWS SNAPPED TREE BRANCH AT
            CARRINGTON GOLF CLUB.

0630 PM     TSTM WND DMG     RICHMOND                42.81N 82.75W
08/29/2022                   MACOMB             MI   TRAINED SPOTTER

            NUMEROUS TREES DOWNED ACROSS RICHMOND. LARGEST WAS A FOOT
            IN DIAMETER.

0631 PM     MARINE TSTM WIND 2 S GROSSE POINTE       42.36N 82.91W
08/29/2022  M60.00 MPH       LCZ460             MI   C-MAN STATION

0635 PM     TSTM WND GST     2 E MOUNT CLEMENS       42.60N 82.84W
08/29/2022  M63.00 MPH       MACOMB             MI   AWOS

            MEASURED AT KMTC SELFRIDGE ANGB.

0655 PM     TSTM WND DMG     ALGONAC                 42.62N 82.53W
08/29/2022                   ST. CLAIR          MI   911 CALL CENTER

            DISPATCH REPORTS NUMEROUS TREES AND POWER LINES DOWN IN
            ALGONAC.

National Storm Reports for August 29, 2022

Environment

A prefrontal trough was positioned across the Upper Midwest during the early morning hours and went through modest amplification as it moved southeastward into the Midwest and Great Lakes region by the later afternoon (Figure 1). Prior to the arrival of severe thunderstorms across SE MI, elevated thunderstorms initially started across Iowa in the vicinity of a cold front. These thunderstorms pushed ahead of the surface cold front into an area of better buoyancy, allowing thunderstorms to grow upscale as a cold pool matured. Thunderstorms turned surface based across central and eastern Illinois as they progressed into an increasingly moist and unstable environment. The 12Z DTX RAOB recorded a precipitable water (PW) value of 1.84 (Figure 2), a near record moisture value per climatology, with SPC mesoanalysis data showing values as high as 2.00 across the Tri-Cities (Figure 4). Near record moisture with dew points firmly in the 70s (Figure 1) allowed MLCAPEs to increase between 2,000 – 3,000 J/kg by the afternoon hours (Figure 5). This allowed thunderstorms to maintain intensity as they traveled east into northern Indiana and southwest Michigan, with new cell growth noted on the northern flank of the initially thunderstorm line in response to the aforementioned prefrontal trough. By the time thunderstorms reached SE MI, it evolved into a squall line with a near-balanced updraft/downdraft convergence zone and embedded pockets of strong winds. This resulted in numerous to widespread wind damage reports for nearly all locations outside of the northern Thumb, as wind gusts on the order of 65-75 mph reached the ground. Additionally, some isolated to scattered convection developed just ahead of this line across the Metro region. DCAPEs on the order of 1200-1400 J/kg (Figure 6) brought some isolated damaging wind gusts to 60 mph, prior to the arrival of the squall line.

Click on the images below to see them expanded.

Figure 1: Surface Analysis, valid 2100 UTC 29 August 2022	Figure 2: KDTX observed sounding, valid 1200 UTC 29 August 2022	Figure 3: KDTX observed sounding, valid 0000 UTC 30 August 2022
Figure 4: Precipitable Water, valid 2100 UTC 29 August 2022	Figure 5: Mixed Layer CAPE, valid 2100 UTC 29 August 2022	Figure 6: Downdraft CAPE, valid 1900 UTC 29 August 2022
Figure 7: Surface-based CAPE, valid 2000 UTC 29 August 2022	Figure 8: 0-6km Bulk Wind Shear, valid 2200 UTC 29 August 2022	Figure 9: 0-1km Bulk Wind Shear, valid 2000 UTC 29 August 2022
Figure 10: Midlevel Lapse Rates, valid 2000 UTC 29 August 2022	Figure 11: Supercell Composite Parameter, valid 2000 UTC 29 August 2022	Figure 12: Significant Tornado Parameter, valid 2100 UTC 29 August 2022
Figure 13: 500mb Analysis, valid 2100 UTC 29 August 2022