Photos

Mayville, MI Credit: Fred Moses	Brown City, MI Credit: Mary Stikeleather Piorunek	Gregory, MI Credit: Kris Kashubosky DeAngelo
Macomb Township, MI Credit: Brendan Morang	Macomb Township, MI Credit: Brendan Morang

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
908 AM EDT Wed Jul 12 2023

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

0250 PM     Tstm Wnd Gst     5 NNE Keewahdin         43.10N  82.40W
07/11/2023  M40 mph          LHZ443             MI   Buoy

            Measured at Buoy 45209

0252 PM     Hail             8 E Vassar              43.37N  83.42W
07/11/2023  M1.00 inch       Tuscola            MI   Broadcast Media

            Picture of quarter sized hail

0313 PM     Tstm Wnd Dmg     3 WSW Silverwood        43.31N  83.30W
07/11/2023                   Lapeer             MI   911 Call Center

            Dispatch reports wires down across the northern portion
            of Lapeer county with a tree down near Mayville

0402 PM     Tstm Wnd Dmg     Hell                    42.43N  83.98W
07/11/2023                   Livingston         MI   Broadcast Media

            Tree and large limbs down with small hail

0402 PM     Tstm Wnd Dmg     1 SSE Chalkerville      42.42N  84.01W
07/11/2023                   Washtenaw          MI   Emergency Mngr

            EM reports numerous trees down on houses, numerous
            wires down, and a 20ft pontoon boat was flipped on
            Halfmoon Lake

0436 PM     Rain             3 W Lakeport            43.11N  82.56W
07/11/2023  M2.20 inch       St. Clair          MI   Public

0442 PM     Tstm Wnd Dmg     1 SW Goodison           42.72N  83.17W
07/11/2023                   Oakland            MI   Public

            Social media picture of tree across road near the
            intersection of Silverbell and Gallagher Rds

0443 PM     Tstm Wnd Dmg     1 ESE Rochester Hills   42.65N  83.13W
07/11/2023                   Oakland            MI   Trained Spotter

            Large limbs down area the area of Rochester Rd, Hamlin
            Rd, and Avon Rds

0444 PM     Tstm Wnd Dmg     Yates                   42.67N  83.10W
07/11/2023                   Oakland            MI   Trained Spotter

            Large limbs down causing damage to house siding near
            Avon and Dequindre

0449 PM     Tstm Wnd Dmg     2 ENE Yates             42.68N  83.07W
07/11/2023                   Macomb             MI   Trained Spotter

            Numerous large limbs down around 24 mile and Shelby Rd

0500 PM     Tstm Wnd Dmg     1 NW Allen`s Trailer Co 42.09N  83.97W
07/11/2023                   Washtenaw          MI   Emergency Mngr

            EM reports numerous trees down and damage to a barn
            near Clinton and Allen Rds

0503 PM     Tstm Wnd Dmg     1 N Meade               42.73N  82.88W
07/11/2023                   Macomb             MI   Public

            Large tree limbs down partially blocking North Ave
            between 26 and 27 mile rds

0505 PM     Tstm Wnd Dmg     Chesterfield            42.66N  82.84W
07/11/2023                   Macomb             MI   Public

            Social media pictures of numerous trees down in yards,
            across streets, and on power lines

0512 PM     Tstm Wnd Dmg     1 ENE New Baltimore     42.69N  82.72W
07/11/2023                   Macomb             MI   Public

            Social media pictures of large limbs down near M-29 and
            Walpole.

0520 PM     Tstm Wnd Dmg     3 N Britton             42.02N  83.83W
07/11/2023                   Lenawee            MI   Trained Spotter

            Pictures of tree uprooted, numerous tree limbs of
            various sizes down

0525 PM     Hail             2 ENE Britton           42.00N  83.80W
07/11/2023  M1.00 inch       Lenawee            MI   Trained Spotter

            Quarter size hail along the edge of the hail core

0528 PM     Tstm Wnd Dmg     Marine City             42.72N  82.49W
07/11/2023                   St. Clair          MI   Trained Spotter

            Snapped power pole and large tree limb down on house.

0530 PM     Tstm Wnd Dmg     Marine City             42.71N  82.50W
07/11/2023                   St. Clair          MI   Trained Spotter

            Tree limbs down throughout town

0548 PM     Tstm Wnd Dmg     1 SW Smiths Creek       42.90N  82.62W
07/11/2023                   St. Clair          MI   Trained Spotter

            Large limbs down in yard near Mayer and Yager Rds

0600 PM     Rain             Jeddo                   43.15N  82.58W
07/11/2023  M2.00 inch       St. Clair          MI   Trained Spotter

            4 hour rainfall total.

0621 PM     Tstm Wnd Gst     Grosse Pointe Shores    42.43N  82.87W
07/11/2023  M41 mph          LCZ460             MI   Mesonet

            Measured at Grosse Pointe Yacht Club

1200 AM     Rain             Adrian                  41.90N  84.04W
07/12/2023  M1.09 inch       Lenawee            MI   Co-Op Observer

            24 hour rainfall total.

National Storm Reports for July 11, 2023

Environment

Click on the images below to see them expanded.

Figure 1: WPC Surface Analysis, valid 18 UTC   July 11, 2023	Figure 2: SPC Day 1 Outlook, valid 1630 UTC    July 11, 2023	Figure 3: KDTX Observed Sounding, valid 20 UTC  July 11, 2023
Figure 4: Mid Level Lapse Rates, valid 19 UTC  July 11, 2023	Figure 5: Mixed-Layer CAPE, valid 19 UTC          July 11, 2023	Figure 6: Surface Dew Points, valid 18 UTC         July 11, 2023
Figure 7: Downdraft CAPE, valid 18 UTC           July 11, 2023	Figure 8: 0-3 km Lapse Rates, valid 19 UTC         July 11, 2023	Figure 9: Effective Bulk Wind Shear, valid 19 UTC July 11, 2023