Damaging Winds in Michigan, August 12, 2021

Name: Damaging Winds in Michigan, August 12, 2021
Start: 2021-08-12T04:36
End: 2021-08-12T17:22
Location: Michigan

August 12, 2021 · NWS IWX · 17 events in 3 counties and zones

Storms moved across the area during the early morning of 8/12. Initial disorganized storms evolved into two distinct, organized multi-cell clusters.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: $58,000
Crop damage: None recorded
Events: 17

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS IWX wrote it up.

Storms moved across the area during the early morning of 8/12. Initial disorganized storms evolved into two distinct, organized multi-cell clusters. One tracking from Bristol ENE through Middlebury, Constantine, Sturgis, Coldwater, Jonesville, HIllsdale and Moscow. The second tracked from Francesville ENE through Winimac, Rochester, Mentone, Warsaw, Syracuse, and Albion. Both were characterized by downbursting cores which tapped into an exceptional strong mid level jet (winds in excess of 70kts) which lead to extensive tree and powerline damage. Multiple homes were also impacted from falling trees.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Northern Indiana wrote its last area forecast discussion before the first event at Aug 12, 2:50 AM EST, 1 hour 46 minutes earlier.

Area forecast discussion, Aug 12, 2:50 AM EST, 1 hour 46 minutes before

Area Forecast Discussion
National Weather Service Northern Indiana
350 AM EDT Thu Aug 12 2021

.SYNOPSIS...
Issued at 333 AM EDT Thu Aug 12 2021

Storms will move into the area early this morning a be accompanied
by strong or possibly damaging winds and very heavy rain. There
should be a brief ending of the storms by noon. Hot and humid
conditions will develop this afternoon with highs close to 90
degrees and heat indices from 98 to 105. Storms may bring some
relief from the heat by this evening. Dry and pleasant conditions
are forecast for the weekend.

&&

.SHORT TERM...(Today and Tonight)
Issued at 333 AM EDT Thu Aug 12 2021

The powder keg of CAPE (instability) was still over the area with
surface based values of close to 5000 J/kg just to the west of
the forecast area according to the latest SPC mesoanalysis. Last
night, a small embeded shortwave/disturbance over northern MO was
able to tap into this energy with the storm activity really
exploding as the system moved northeast over the forecast area
producing widespread wind damage yesterday. At the time of this
writing, another embedded disturbance was near the southeast
corner of IA with convection starting to take off. Farther north,
more storms were forming along a front where dew points were
pooling near 80F. Overall, models were really struggling with this
pattern and not initializing convection well. SPC analysis showed
a layer of inhibition (CIN) below a large area of steep lapse
rates in the EML. These storms should continue to develop and grow
more rapidly as they tap into deeper instability aloft. Storms
should become more numerous before daybreak but should move out of
the area before noon.

At 1 AM EDT heat indices already 85 to 92 west of highway 13 which
covered the western half of northern Indiana and far southwest
Lower Michigan. Will likely reissue the heat advisory given an
anticipated break in the storms during max afternoon heating. More
storms will likely form before evening given daytime instability
and residual boundaries. The main threats for the storms today and
tonight is damaging winds and local flooding.

&&

.LONG TERM...(Friday through Wednesday)
Issued at 333 AM EDT Thu Aug 12 2021

Storms should end by Saturday morning with clearing skies and
cooler temperatures behind a cold front.

&&

.AVIATION...(For the 06Z TAFS through 06Z Thursday Night)
Issued at 126 AM EDT Thu Aug 12 2021

Uncertain near term owing to renewed convective development across
wrn-ne IL attm and potential downstream ramifications going forward.
00Z based CAMS not particularly helpful although recent HRRR
suggestion looks on target. Upstream mass convergence ahead of sfc
cold front and in association with upper trough in WI aiding storm
development within a very unstable airmass aloft. Low level capping
inversion present in most midwest UA soundings yet apparently
weakening enough in tandem with strong LLJ in place to force renewed
development which with time should fill in/organize with ewd extent.
Some attendant svr risk should storms root into this moist/unstable
boundary layer and will monitor closely upstream evolution. For now,
will just tempo a IFR/MVFR cat storm based restriction early
this morning.

In wake of this, most of today expected to be quiet or until this
aftn as strong destabilization and potential influence of sw trough
aloft leads to another round of storms. Will address that potential
in 12Z fcst.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...Heat Advisory from 1 PM EDT /noon CDT/ this afternoon to 8 PM
     EDT /7 PM CDT/ this evening for INZ003>009-012>018-020-
     022>027-032>034.

MI...Heat Advisory from 1 PM this afternoon to 8 PM EDT this evening
     for MIZ077>081.

OH...Heat Advisory from 1 PM this afternoon to 8 PM EDT this evening
     for OHZ001-002-004-005-015-016-024-025.

LM...NONE.
&&

SYNOPSIS...Skipper
SHORT TERM...Skipper
LONG TERM...Skipper
AVIATION...T

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Hazardous weather outlook, Aug 12, 4:36 AM EST, 0 minutes before

Hazardous Weather Outlook
National Weather Service Northern Indiana
536 AM EDT Thu Aug 12 2021

INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005-
015-016-024-025-130945-
La Porte-St. Joseph IN-Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-
Pulaski-Marshall-Fulton IN-Kosciusko-Whitley-Allen IN-White-Cass IN-
Miami-Wabash-Huntington-Wells-Adams-Grant-Blackford-Jay-Berrien-
Cass MI-St. Joseph MI-Branch-Hillsdale-Williams-Fulton OH-Defiance-
Henry-Paulding-Putnam-Van Wert-Allen OH-
536 AM EDT Thu Aug 12 2021 /436 AM CDT Thu Aug 12 2021/

...HEAT ADVISORY IN EFFECT FROM 1 PM EDT /NOON CDT/ THIS AFTERNOON
TO 8 PM EDT /7 PM CDT/ THIS EVENING...

This Hazardous Weather Outlook is for northern Indiana, southwest
Michigan and northwest Ohio.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Heat Advisory.

Thunderstorms are likely at times, especially early this morning, and
then again late this afternoon through tonight. The storms may be
accompanied by strong winds and locally heavy rain.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Thunderstorms are possible Friday. The storms may be accompanied by
strong gusty winds and locally heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

LMZ043-046-130945-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
536 AM EDT Thu Aug 12 2021

This Hazardous Weather Outlook is for the nearshore waters of
southeastern Lake Michigan.

.DAY ONE...Today and tonight.

A moderate swim risk is forecast for today and tonight along with a
chance thunderstorms accompanied by strong gusty winds.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

A moderate swim risk is forecast for Friday along with a slight
chance for a thunderstorm accompanied by gusty winds.

In the hours before

Local storm report, Aug 11, 11:02 PM EST, 5 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1202 AM EDT THU AUG 12 2021

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

1246 PM     TSTM WND DMG     1 SSW INWOOD            41.30N 86.21W
08/11/2021                   MARSHALL           IN   TRAINED SPOTTER

            DELAYED REPORT. SEVERAL HEALTHY 1-2 FT
            DIAMETER TREES DOWNED, NUMEROUS SMALLER
            LIMBS BROKEN OFF. ONE ROTTED TREE WAS
            SNAPPED IN HALF. NEAR COUNTY ROADS 12B AND
            12TH.

0118 PM     TSTM WND DMG     2 E ADAMSBORO           40.79N 86.24W
08/11/2021                   CASS               IN   PUBLIC

            DELAYED REPORT. SNAPPED POWER POLE AND
            DOWNED TREES, BRANCHES ALONG E 150 N. NO
            TREE OR LIMB HEALTH OR SIZE INFORMATION.
            ALSO REPORTS OF TREES AND LIMBS DOWN ON
            600E.

0125 PM     TSTM WND DMG     CONSTANTINE             41.84N 85.66W
08/11/2021                   ST. JOSEPH         MI   BROADCAST MEDIA

            DELAYED REPORT. MASSIVE TREE UPROOTED AT THE
            CONSTANTINE TWP. CEMETERY. APPROXIMATELY 3
            FEET IN DIAMETER. APPEARED TO BE IN GOOD
            HEALTH.

0130 PM     TSTM WND DMG     1 N TRI-LAKES           41.23N 85.48W
08/11/2021                   WHITLEY            IN   TRAINED SPOTTER

            DELAYED REPORT. HEALTHY PINE TREE OF AROUND
            1 TO 2 FT IN DIAMETER SNAPPED IN HALF.
            NUMEROUS LIMBS RANGING FROM 3 INCHES TO 1 FT
            IN DIAMETER DOWNED.

0145 PM     TSTM WND DMG     COLON                   41.96N 85.32W
08/11/2021                   ST. JOSEPH         MI   PUBLIC

            DELAYED REPORT. NUMEROUS 1-2 FT DIAMETER OR
            SMALLER LIMBS DOWNED AROUND COLON TOWNSHIP
            AND THE VILLAGE. SEVERAL TREES UPROOTED OR
            SNAPPED, AROUND 1-3 FT IN DIAMETER. ONE TREE
            FELL ON A HOUSE, MINOR STRUCTURAL DAMAGE.
            PART OF A METAL ROOF WAS TORN OFF A STORAGE
            BUILDING.

0150 PM     TSTM WND DMG     2 NW FORT WAYNE         41.10N 85.17W
08/11/2021                   ALLEN              IN   PUBLIC

            DELAYED REPORT. A TREE LIMB BROKE THROUGH A
            WINDOW AT A MANUFACTURING PLANT. NO
            INJURIES.

0150 PM     TSTM WND DMG     COLDWATER               41.94N 85.00W
08/11/2021                   BRANCH             MI   PUBLIC

            LARGE TREE DOWNED ON A HOME.

0210 PM     TSTM WND GST     HICKSVILLE              41.29N 84.77W
08/11/2021  M65 MPH          DEFIANCE           OH   BROADCAST MEDIA

            DELAYED REPORT.

0210 PM     TSTM WND DMG     HICKSVILLE              41.29N 84.77W
08/11/2021                   DEFIANCE           OH   BROADCAST MEDIA

            DELAYED REPORT. A 1 FT DIAMETER TREE LIMB
            WAS DOWNED ACROSS HIGH STREET, FELL ONTO
            POWER LINE. TREE LIMB APPEARED HEALTHY IN
            PICTURE.

0300 PM     TSTM WND DMG     GOMER                   40.84N 84.19W
08/11/2021                   ALLEN              OH   PUBLIC

            DELAYED REPORT. SEVERAL 1 TO 2 FT DIAMETER
            LIMBS DOWNED, A FEW LARGER TREES OF 2 TO 3
            FEET IN DIAMETER DOWNED. TREES APPEARED
            HEALTHY IN PHOTOS.

&&

Local storm report, Aug 11, 11:06 PM EST, 5 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1206 AM EDT THU AUG 12 2021

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

0329 PM     TSTM WND DMG     3 E BELLFOUNTAIN        40.44N 84.80W
08/11/2021                   JAY                IN   EMERGENCY MNGR

            TREE DOWN ACROSS STATE LINE ROAD AT 200 S
            BETWEEN JAY AND MERCER COUNTIES ON THE
            INDIANA SIDE.

0325 PM     TSTM WND GST     2 WNW WESTMINSTER       40.70N 84.02W
08/11/2021  M54 MPH          ALLEN              OH   ASOS

            ASOS STATION KAOH LIMA.

0322 PM     TSTM WND DMG     PORTLAND                40.44N 85.02W
08/11/2021                   JAY                IN   EMERGENCY MNGR

            MULTIPLE TREES REPORTED DOWN NEAR 200 W AND
            SR 67 NEAR JAY COUNTY HIGH SCHOOL. ALSO
            MULTIPLE TREES DOWN NEAR 100 N AND US 27
            NEAR OAKWOOD TRAILER PARK.

0317 PM     TSTM WND DMG     MONTPELIER              41.59N 84.61W
08/11/2021                   WILLIAMS           OH   PUBLIC

            LARGE BRANCHES DOWN ON A HOUSE AND IN THE
            ROAD.

0315 PM     TSTM WND GST     1 NNW PORTLAND          40.45N 84.99W
08/11/2021  M67 MPH          JAY                IN   MESONET

            MESONET STATION KPLD PORTLAND MUNICIPAL
            AIRPORT.

0315 PM     TSTM WND DMG     1 N SWANTON             41.60N 83.89W
08/11/2021                   FULTON             OH   AMATEUR RADIO

            TREE DOWN ON A HOUSE IN SWANTON OFF OF
            BROOKSIDE DRIVE.

0315 PM     TSTM WND DMG     YODER                   40.69N 84.07W
08/11/2021                   ALLEN              OH   EMERGENCY MNGR

            TWO TREES AND SEVERAL POWERLINES DOWN.

0312 PM     TSTM WND GST     5 SW PORTLAND           40.39N 85.05W
08/11/2021  E45 MPH          JAY                IN   PUBLIC

            ESTIMATED 40-45 MPH WIND GUSTS.

0310 PM     TSTM WND DMG     2 W PORTLAND            40.43N 85.02W
08/11/2021                   JAY                IN   EMERGENCY MNGR

            MULTIPLE TREES BEING REPORTED DOWN IN THE
            AREA OF 200 W AND SR 67 NEAR JAY COUNTY HIGH
            SCHOOL, IN THE CITY OF PORTLAND AND NORTH OF
            PORTLAND 100 N US 27 AT OAKWOOD TRAILER PARK
            NO TREE SIZES GIVEN.

0306 PM     HEAVY RAIN       BRYAN                   41.50N 84.72W
08/11/2021  M0.76 INCH       WILLIAMS           OH   PUBLIC

0306 PM     TSTM WND DMG     2 NNW SWANTON           41.62N 83.91W
08/11/2021                   FULTON             OH   FIRE DEPT/RESCUE

            WIRES DOWN ON SR 64 AT CR K. FULTON
            TOWNSHIP.

0306 PM     TSTM WND DMG     1 NNW SWANTON           41.60N 83.89W
08/11/2021                   FULTON             OH   FIRE DEPT/RESCUE

            WIRES DOWN ON BROOKSIDE DRIVE.

0303 PM     TSTM WND DMG     2 SSW LYONS             41.67N 84.09W
08/11/2021                   FULTON             OH   FIRE DEPT/RESCUE

            WIRES DOWN ON US 20 ROYALTON TOWNSHIP, OH.

0302 PM     TSTM WND GST     KALIDA                  40.98N 84.20W
08/11/2021  M53 MPH          PUTNAM             OH   MESONET

            MESONET STATION DW3681 KALIDA.

0300 PM     TSTM WND DMG     DELTA                   41.58N 84.00W
08/11/2021                   FULTON             OH   FIRE DEPT/RESCUE

            WIRES DOWN ON CR 7.

0300 PM     TSTM WND DMG     GOMER                   40.84N 84.19W
08/11/2021                   ALLEN              OH   PUBLIC

            DELAYED REPORT. SEVERAL 1 TO 2 FT DIAMETER
            LIMBS DOWNED, A FEW LARGER TREES OF 2 TO 3
            FEET IN DIAMETER DOWNED. TREES APPEARED
            HEALTHY IN PHOTOS.

0259 PM     TSTM WND GST     JEWELL                  41.33N 84.29W
08/11/2021  E40 MPH          DEFIANCE           OH   PUBLIC

            40 MPH WINDS SUSTAINED.

0257 PM     TSTM WND GST     HOAGLAND                40.95N 85.00W
08/11/2021  M40 MPH          ALLEN              IN   PUBLIC

            40 MPH SUSTAINED WINDS MEASURED.

0256 PM     HEAVY RAIN       1 E GRANGER             41.76N 86.13W
08/11/2021  M0.85 INCH       ST. JOSEPH         IN   PUBLIC

            0.85 INCHES OF RAIN FELL BETWEEN NOW AND 7
            AM EDT THIS MORNING.

0255 PM     TSTM WND GST     1 N OTTOKEE             41.62N 84.13W
08/11/2021  M46 MPH          FULTON             OH   AWOS

            AWOS STATION KUSE WAUSEON.

0254 PM     TSTM WND DMG     2 SSE LYONS             41.67N 84.05W
08/11/2021                   FULTON             OH   FIRE DEPT/RESCUE

            LYONS-ROYALTON FIRE REPORTS WIRES DOWN.

0254 PM     TSTM WND DMG     2 WSW OAKSHADE          41.65N 84.19W
08/11/2021                   FULTON             OH   TRAINED SPOTTER

            4 LIMBS DOWNED, 3 OF THEM AROUND 1-2 FEET IN
            DIAMETER, THE OTHER WAS AROUND 3-6 INCHES IN
            DIAMETER.

0254 PM     TSTM WND DMG     STURGIS                 41.81N 85.42W
08/11/2021                   ST. JOSEPH         MI   PUBLIC

            MULTIPLE LARGE TREES DOWN IN STURGIS.

0253 PM     TSTM WND DMG     3 WSW DENSON            41.69N 84.21W
08/11/2021                   FULTON             OH   FIRE DEPT/RESCUE

            MORENCI FIRE REPORTS WIRES DOWN ON SR 108 IN
            CHESTERFIELD TWP OHIO.

0248 PM     TSTM WND DMG     FAYETTE                 41.68N 84.33W
08/11/2021                   FULTON             OH   AMATEUR RADIO

            MULTIPLE 3-4 INCH TREE BRANCHES DOWN AT THE
            INTERSECTION OF STATE ROAD 66 AND US 20.

0247 PM     TSTM WND GST     FORT WAYNE INTERNATIONA 40.98N 85.18W
08/11/2021  M54 MPH          ALLEN              IN   ASOS

0247 PM     TSTM WND DMG     1 N ZONE                41.63N 84.33W
08/11/2021                   FULTON             OH   FIRE DEPT/RESCUE

            GORHAM-FAYETTE FIRE REPORTED WIRES DOWNED ON
            STATE ROUTE 66 IN GORHAM TWP.

0242 PM     TSTM WND GST     1 N BLAKESLEE           41.54N 84.73W
08/11/2021  E60 MPH          WILLIAMS           OH   PUBLIC

            ESTIMATED 60 MPH WIND GUSTS.

0242 PM     TSTM WND DMG     FAYETTE                 41.67N 84.33W
08/11/2021                   FULTON             OH   TRAINED SPOTTER

            NUMEROUS POWERLINES, TREES, AND LIMBS DOWNED
            IN SOUTH FAYETTE AND EASTWARD ALONG US
            HIGHWAY 20 (BETWEEN CR 19 AND 23). THERE
            WERE LIMBS RANGING FROM 6 INCHES TO AROUND 2
            FEET IN DIAMETER. SEVERAL PINE TREES OF
            AROUND 1 TO 2 FEET IN DIAMETER WERE SNAPPED
            OFF, MOST APPEAR HEALTHY. A COUPLE OF TREES
            WERE ALSO UPROOTED. ONE HOUSE ON CYNTHIA
            DRIVE IN SOUTH FAYETTE HAD A TREE DOWNED ON
            THE HOUSE, WITH GUTTER AND ROOF DAMAGE.
            SHINGLES WERE STREWN ABOUT THE AREA, CORN
            CROPS WERE FLATTENED IN SOME PLACES.

0240 PM     TSTM WND GST     2 SW HALLOCK            41.51N 84.59W
08/11/2021  M47 MPH          WILLIAMS           OH   MESONET

            MESONET STATION AS584 BRYAN.

0239 PM     TSTM WND DMG     3 N HICKSVILLE          41.34N 84.77W
08/11/2021                   DEFIANCE           OH   EMERGENCY MNGR

            ROOF BLOWN OFF OF A SHED AND INTO POWER
            LINES.

0238 PM     TSTM WND GST     VAN WERT                40.87N 84.58W
08/11/2021  E47 MPH          VAN WERT           OH   EMERGENCY MNGR

            47 MPH WIND GUST REPORTED AS THE GUST FRONT
            GOES THROUGH IN VAN WERT.

0231 PM     HAIL             3 W WOODBURN            41.13N 84.91W
08/11/2021   NAN INCH        ALLEN              IN   AMATEUR RADIO

            PEA SIZED HAIL REPORTED.

0230 PM     TSTM WND DMG     MENDON                  42.01N 85.45W
08/11/2021                   ST. JOSEPH         MI   PUBLIC

            LARGE BRANCHES DOWN IN THE ROAD AT YZ AVENUE
            AND 27TH STREET.

0230 PM     TSTM WND DMG     1 S BLUFFTON            40.73N 85.17W
08/11/2021                   WELLS              IN   TRAINED SPOTTER

            ROTTED TREE DOWN.

0229 PM     TSTM WND DMG     HICKSVILLE              41.29N 84.77W
08/11/2021                   DEFIANCE           OH   PUBLIC

            LARGE TREE LIMB DOWN BLOCKING ROAD. BETWEEN
            300 WEST ARTHUR STREET AND WEST HIGH STREET.

0229 PM     TSTM WND DMG     HICKSVILLE              41.29N 84.77W
08/11/2021                   DEFIANCE           OH   PUBLIC

            TREE DOWN ON WEST HIGH STREET NEAR
            SPENCERVILLE.

0229 PM     TSTM WND DMG     1 NNW HOWE              41.73N 85.43W
08/11/2021                   LAGRANGE           IN   PUBLIC

            LARGE TREE DOWN ACROSS CR 800 SOUTH NEAR SR
            19.

0225 PM     TSTM WND DMG     1 N ARCANA              40.55N 85.50W
08/11/2021                   GRANT              IN   LAW ENFORCEMENT

            MULTIPLE TREES AND POWERLINES DOWNED.

0224 PM     TSTM WND GST     3 SSE HICKSVILLE        41.25N 84.74W
08/11/2021  M73 MPH          DEFIANCE           OH   TRAINED SPOTTER

            TRAINED SPOTTER 73 MPH MEASURED WIND GUST AT
            THE CORNER OF OHIO STATE ROUTE 49 AND
            PAULDING/DEFIANCE COUNTY LINE RD. SEVERAL
            LARGE BRANCHES DOWN AND OBJECTS BLOWN AROUND
            IN THE AREA.

0223 PM     HEAVY RAIN       1 NW SOUTH BEND         41.70N 86.24W
08/11/2021  E1.00 INCH       ST. JOSEPH         IN   PUBLIC

            ESTIMATED 1 INCH OF RAIN IN 25 MINUTES.

0223 PM     TSTM WND DMG     3 NNE GOSHEN            41.62N 85.81W
08/11/2021                   ELKHART            IN   PUBLIC

            MULTIPLE TREES DOWN IN YARDS ON CR 126.

0220 PM     TSTM WND DMG     HILLSDALE               41.92N 84.64W
08/11/2021                   HILLSDALE          MI   PUBLIC

            REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN;
            POWER POLES BROKEN.

0217 PM     TSTM WND DMG     HILLSDALE               41.92N 84.64W
08/11/2021                   HILLSDALE          MI   PUBLIC

            REPORT FROM MPING: SHINGLES BLOWN OFF.

0217 PM     TSTM WND DMG     FORT WAYNE              41.08N 85.14W
08/11/2021                   ALLEN              IN   EMERGENCY MNGR

            MULTIPLE REPORTS OF DOWNED TREES AND
            POWERLINES REPORTED BY ALLEN COUNTY
            DISPATCH.

0217 PM     TSTM WND DMG     3 W NEW HAVEN           41.07N 85.08W
08/11/2021                   ALLEN              IN   PUBLIC

            REPORT FROM MPING: TREES UPROOTED OR
            SNAPPED.

0216 PM     TSTM WND DMG     LEO-CEDARVILLE          41.21N 85.02W
08/11/2021                   ALLEN              IN   PUBLIC

            REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN;
            POWER POLES BROKEN.

0215 PM     TSTM WND GST     4 NNW UNIONDALE         40.88N 85.28W
08/11/2021  M61 MPH          WELLS              IN   PUBLIC

            SHINGLES REMOVED FROM OLD BARN. AUTOMATED WX
            STATION RECORDED 61 MPH WIND GUST.

0215 PM     TSTM WND DMG     2 NW WOODBURN           41.15N 84.88W
08/11/2021                   ALLEN              IN   AMATEUR RADIO

            ESTIMATED 3 INCH DIAMETER ROTTED BRANCH
            DOWN. ESTIMATED WIND GUSTS OF 47-54 MPH.

0215 PM     TSTM WND DMG     2 NNW ROLLING HILLS     41.06N 85.28W
08/11/2021                   ALLEN              IN   PUBLIC

            STREET LIGHT POLE AND LIGHT FELL TO THE
            GROUND AT THIS INTERSECTION.

0214 PM     TSTM WND DMG     1 N HUNTERTOWN          41.25N 85.17W
08/11/2021                   ALLEN              IN   FIRE DEPT/RESCUE

            LARGE TREE BLOCKING THE ROAD AT INTERSECTION
            STATE ROAD 3 AND SHOAFF ROAD.

0213 PM     TSTM WND DMG     ANGOLA                  41.64N 85.00W
08/11/2021                   STEUBEN            IN   EMERGENCY MNGR

            EMERGENCY MANAGER REPORTS TREES DOWN AND 40
            MPH WIND GUSTS IN STEUBEN COUNTY.

0212 PM     TSTM WND GST     1 NNW BRYAN             41.48N 84.55W
08/11/2021  M48 MPH          WILLIAMS           OH   PUBLIC

0212 PM     TSTM WND DMG     BRYAN                   41.48N 84.55W
08/11/2021                   WILLIAMS           OH   PUBLIC

            CORN FLATTENED AND SEVERAL TREES DOWN.

0210 PM     TSTM WND DMG     3 SSE WALLEN            41.12N 85.15W
08/11/2021                   ALLEN              IN   PUBLIC

            TREE DOWN ON WELLS ST. REPORTED THROUGH
            FACEBOOK.

0210 PM     TSTM WND GST     HICKSVILLE              41.29N 84.77W
08/11/2021  M65 MPH          DEFIANCE           OH   BROADCAST MEDIA

            DELAYED REPORT.

0210 PM     TSTM WND DMG     HICKSVILLE              41.29N 84.77W
08/11/2021                   DEFIANCE           OH   BROADCAST MEDIA

            DELAYED REPORT. A 1 FT DIAMETER TREE LIMB
            WAS DOWNED ACROSS HIGH STREET, FELL ONTO
            POWER LINE. TREE LIMB APPEARED HEALTHY IN
            PICTURE.

0207 PM     TSTM WND DMG     HARLAN                  41.19N 84.92W
08/11/2021                   ALLEN              IN   PUBLIC

            REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN;
            POWER POLES BROKEN.

0205 PM     TSTM WND DMG     2 WNW WATERLOO          41.44N 85.06W
08/11/2021                   DE KALB            IN   NWS EMPLOYEE

            A PORTION OF US-6 WAS BLOCKED BY EITHER A
            TREE OR KNOCKED DOWN ROAD SIGN.

0202 PM     TSTM WND DMG     BRISTOL                 41.72N 85.82W
08/11/2021                   ELKHART            IN   AMATEUR RADIO

            LARGE, PARTIALLY ROTTED TREE DOWN IN
            BRISTOL. ESTIMATED 1-2 FEET IN DIAMETER FROM
            PHOTO.

0200 PM     TSTM WND DMG     AUBURN                  41.37N 85.06W
08/11/2021                   DE KALB            IN   EMERGENCY MNGR

            NUMEROUS TREES DOWN ACROSS THE ENTIRE
            COUNTY.

0158 PM     TSTM WND DMG     2 ENE ELKHART           41.70N 85.93W
08/11/2021                   ELKHART            IN   PUBLIC

            NUMEROUS TREES AND LARGE BRANCHES DOWN.

0157 PM     TSTM WND DMG     1 SE ORLAND             41.72N 85.15W
08/11/2021                   STEUBEN            IN   EMERGENCY MNGR

            TREE DOWN ON ORLAND ROAD SOUTHEAST OF
            ORLAND, INDIANA.

0150 PM     TSTM WND DMG     COLDWATER               41.94N 85.00W
08/11/2021                   BRANCH             MI   PUBLIC

            LARGE TREE DOWNED ON A HOME.

0150 PM     TSTM WND DMG     2 NW FORT WAYNE         41.10N 85.17W
08/11/2021                   ALLEN              IN   PUBLIC

            DELAYED REPORT. A TREE LIMB BROKE THROUGH A
            WINDOW AT A MANUFACTURING PLANT. NO
            INJURIES.

0148 PM     TSTM WND GST     4 SSW HUNTINGTON        40.83N 85.53W
08/11/2021  M47 MPH          HUNTINGTON         IN   MESONET

            MESONET STATION CW9663 HUNTINGTON.

0145 PM     TSTM WND DMG     CONSTANTINE             41.84N 85.67W
08/11/2021                   ST. JOSEPH         MI   PUBLIC

            LARGE BRANCHES DOWN. LAWN AND GARDEN
            FURNITURE ALSO LOFTED.

0145 PM     TSTM WND DMG     1 NE CHURUBUSCO         41.25N 85.30W
08/11/2021                   ALLEN              IN   TRAINED SPOTTER

            CORRECTS TIME OF PREVIOUS TSTM WND DMG
            REPORT FROM 1 NE CHURUBUSCO. TREE DOWN ON
            TOP OF POWER LINES.

0145 PM     TSTM WND DMG     COLON                   41.96N 85.32W
08/11/2021                   ST. JOSEPH         MI   PUBLIC

            DELAYED REPORT. NUMEROUS 1-2 FT DIAMETER OR
            SMALLER LIMBS DOWNED AROUND COLON TOWNSHIP
            AND THE VILLAGE. SEVERAL TREES UPROOTED OR
            SNAPPED, AROUND 1-3 FT IN DIAMETER. ONE TREE
            FELL ON A HOUSE, MINOR STRUCTURAL DAMAGE.
            PART OF A METAL ROOF WAS TORN OFF A STORAGE
            BUILDING.

0140 PM     TSTM WND DMG     2 W BRISTOL             41.73N 85.87W
08/11/2021                   ELKHART            IN   PUBLIC

            TREES AND BRANCHES DOWN. BLOCKING COUNTY
            ROAD 6.

0134 PM     TSTM WND GST     2 NW BENTON             41.53N 85.78W
08/11/2021  M53 MPH          ELKHART            IN   ASOS

            ASOS STATION KGSH GOSHEN.

0133 PM     TSTM WND GST     1 ENE PEABODY           41.09N 85.47W
08/11/2021  M52 MPH          WHITLEY            IN   PUBLIC

0130 PM     TSTM WND DMG     1 N CENTREVILLE         41.94N 85.53W
08/11/2021                   ST. JOSEPH         MI   EMERGENCY MNGR

            6 TO 8 POWER POLES SNAPPED ON COVERED BRIDGE
            ROAD NORTH OF CENTREVILLE.

0130 PM     TSTM WND DMG     1 N COLUMBIA CITY       41.17N 85.49W
08/11/2021                   WHITLEY            IN   NWS EMPLOYEE

            TRAMPOLINE STRUCTURE LOFTED. LIKELY ROTTED,
            TREE FELL ON US 30.

0130 PM     TSTM WND DMG     COLUMBIA CITY           41.16N 85.49W
08/11/2021                   WHITLEY            IN   NWS EMPLOYEE

            CONFIRMED 8 INCH DIAMETER TREE BRANCH DOWN.
            ESTIMATED 50-60 MPH WIND GUSTS.

0130 PM     TSTM WND DMG     LARWILL                 41.18N 85.62W
08/11/2021                   WHITLEY            IN   PUBLIC

            CORRECTS PREVIOUS TSTM WND DMG REPORT FROM
            LARWILL. MANGLED TRAMPOLINE IN THE CENTER
            DIVIDE ON US 30 NEAR SR 5.

0130 PM     TSTM WND DMG     1 N TRI-LAKES           41.23N 85.48W
08/11/2021                   WHITLEY            IN   TRAINED SPOTTER

            DELAYED REPORT. HEALTHY PINE TREE OF AROUND
            1 TO 2 FT IN DIAMETER SNAPPED IN HALF.
            NUMEROUS LIMBS RANGING FROM 3 INCHES TO 1 FT
            IN DIAMETER DOWNED.

0125 PM     TSTM WND DMG     WHITE PIGEON            41.80N 85.65W
08/11/2021                   ST. JOSEPH         MI   PUBLIC

            1 TO 2 INCH LIMBS DOWN. WINDS ESTIMATED AT
            55 MPH.

0125 PM     TSTM WND DMG     WHITE PIGEON            41.80N 85.64W
08/11/2021                   ST. JOSEPH         MI   TRAINED SPOTTER

            TREES AND POWERLINES DOWN.

0125 PM     TSTM WND DMG     CONSTANTINE             41.84N 85.66W
08/11/2021                   ST. JOSEPH         MI   BROADCAST MEDIA

            DELAYED REPORT. MASSIVE TREE UPROOTED AT THE
            CONSTANTINE TWP. CEMETERY. APPROXIMATELY 3
            FEET IN DIAMETER. APPEARED TO BE IN GOOD
            HEALTH.

0120 PM     TSTM WND DMG     LEESBURG                41.33N 85.85W
08/11/2021                   KOSCIUSKO          IN   BROADCAST MEDIA

            LARGE TREE TOPPLED IN THIS AREA.

0120 PM     TSTM WND DMG     WARSAW                  41.24N 85.85W
08/11/2021                   KOSCIUSKO          IN   BROADCAST MEDIA

            LIMBS ALSO KNOCKED DOWN IN TOWN.

0118 PM     TSTM WND DMG     1 E BIG BARBEE LAKE     41.29N 85.69W
08/11/2021                   KOSCIUSKO          IN   NWS EMPLOYEE

            SMALL TREE DOWNED ACROSS SR-13 (ABOUT 1 FT
            DIAMETER). TREE APPEARED HEALTHY.

0118 PM     TSTM WND DMG     2 E ADAMSBORO           40.79N 86.24W
08/11/2021                   CASS               IN   PUBLIC

            DELAYED REPORT. SNAPPED POWER POLE AND
            DOWNED TREES, BRANCHES ALONG E 150 N. NO
            TREE OR LIMB HEALTH OR SIZE INFORMATION.
            ALSO REPORTS OF TREES AND LIMBS DOWN ON
            600E.

0116 PM     TSTM WND DMG     1 NNW OSCEOLA           41.68N 86.09W
08/11/2021                   ST. JOSEPH         IN   TRAINED SPOTTER

            DOWNED TREE LIMBS. GUST ESTIMATED AT 60 MPH.

0115 PM     TSTM WND GST     2 NNE WARSAW            41.27N 85.83W
08/11/2021  M41 MPH          KOSCIUSKO          IN   AWOS

            AWOS STATION KASW WARSAW AIRPORT.

0115 PM     TSTM WND DMG     LEESBURG                41.33N 85.85W
08/11/2021                   KOSCIUSKO          IN   BROADCAST MEDIA

            LARGE TREE DOWN IN ROAD.

0115 PM     TSTM WND DMG     3 NW GOSHEN             41.60N 85.88W
08/11/2021                   ELKHART            IN   PUBLIC

            REPORT FROM MPING: TREES UPROOTED OR
            SNAPPED.

0115 PM     TSTM WND DMG     4 SSW BRISTOL           41.67N 85.84W
08/11/2021                   ELKHART            IN   PUBLIC

            CORRECTS TIME FOR PREVIOUS TSTM WND DMG
            REPORT FROM 4 SSW BRISTOL. TREE DAMAGE AT US
            20 AND CR 23. POWERLINES DOWN AT CR 20
            ACROSS SR 15 IN ELKHART COUNTY.

0112 PM     TSTM WND GST     MONOQUET                41.28N 85.86W
08/11/2021  E60 MPH          KOSCIUSKO          IN   NWS EMPLOYEE

            SOME BRANCHES DOWN.

0110 PM     TSTM WND DMG     ELKHART                 41.69N 85.97W
08/11/2021                   ELKHART            IN   PUBLIC

            TREES AND POWERLINES DOWN.

0110 PM     TSTM WND DMG     2 SSW ELKHART           41.67N 85.99W
08/11/2021                   ELKHART            IN   BROADCAST MEDIA

            LARGE TREE DOWN IN ROAD. ESTIMATED 60 MPH
            WINDS.

0108 PM     TSTM WND DMG     UNION                   41.79N 85.87W
08/11/2021                   CASS               MI   EMERGENCY MNGR

            2 TREES DOWNED, ONE ON A MOBILE HOME AND THE
            OTHER ON A HOUSE. SEVERAL SMALLER LIMBS DOWN
            IN THE AREA.

0105 PM     TSTM WND DMG     SIMONTON LAKE           41.75N 85.97W
08/11/2021                   ELKHART            IN   EMERGENCY MNGR

            NUMEROUS TREES DOWN ALONG NORTHSHORE DR WITH
            AT LEAST ONE ONTO A HOUSE.

0100 PM     TSTM WND DMG     OSCEOLA                 41.67N 86.08W
08/11/2021                   ST. JOSEPH         IN   PUBLIC

            CORRECTS TIME FROM PREVIOUS TSTM WND DMG
            REPORT FROM OSCEOLA. SEVERAL LARGE TREES
            DOWN NEAR PLEASANT VALLEY. SOME SHEARED OFF
            20 FEET HIGH.

0100 PM     TSTM WND DMG     1 S TIPPECANOE          41.19N 86.11W
08/11/2021                   MARSHALL           IN   COCORAHS

            SEVERAL 6 INCH DIAMETER LIMBS DOWN AND CORN
            FLATTENED.

0100 PM     TSTM WND DMG     FULTON                  40.95N 86.26W
08/11/2021                   FULTON             IN   EMERGENCY MNGR

            CORRECTS TIME AND EVENT FROM PREVIOUS TSTM
            WND DMG REPORT FROM FULTON. MULTIPLE TREES
            DOWN.

0100 PM     TSTM WND DMG     2 ESE ELKHART           41.68N 85.93W
08/11/2021                   ELKHART            IN   PUBLIC

            REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN.

1254 PM     LIGHTNING        1 ESE GEORGETOWN        41.73N 86.22W
08/11/2021                   ST. JOSEPH         IN   PUBLIC

            LIGHTNING STRUCK BUSINESS ON IRONWOOD ROAD.

1250 PM     TSTM WND GST     2 SW MISHAWAKA          41.65N 86.19W
08/11/2021  E60 MPH          ST. JOSEPH         IN   PUBLIC

            SMALL HAIL OBSERVED AS WELL.

1250 PM     TSTM WND DMG     1 SW MISHAWAKA          41.65N 86.19W
08/11/2021                   ST. JOSEPH         IN   BROADCAST MEDIA

            LARGE TREE LIMB DOWN. WINDS ESTIMATED AT 60
            MPH.

1248 PM     TSTM WND DMG     1 E BERTRAND            41.77N 86.25W
08/11/2021                   BERRIEN            MI   PUBLIC

            REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN.

1246 PM     TSTM WND DMG     1 SSW INWOOD            41.30N 86.21W
08/11/2021                   MARSHALL           IN   TRAINED SPOTTER

            DELAYED REPORT. SEVERAL HEALTHY 1-2 FT
            DIAMETER TREES DOWNED, NUMEROUS SMALLER
            LIMBS BROKEN OFF. ONE ROTTED TREE WAS
            SNAPPED IN HALF. NEAR COUNTY ROADS 12B AND
            12TH.

1232 PM     TSTM WND DMG     NORTH JUDSON            41.21N 86.77W
08/11/2021                   STARKE             IN   PUBLIC

            REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN.

&&

Special weather statement, Aug 12, 2:35 AM EST, 2 hours 1 minute before

Special Weather Statement
National Weather Service Northern Indiana
335 AM EDT Thu Aug 12 2021

MIZ079-080-120800-
Branch MI-St. Joseph MI-
335 AM EDT Thu Aug 12 2021

...A strong thunderstorm will impact portions of east central St.
Joseph and central Branch Counties through 400 AM EDT...

At 334 AM EDT, Doppler radar was tracking a strong thunderstorm near
Colon, or 7 miles north of Sturgis, moving east at 50 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This strong thunderstorm will be near...
  Bronson around 345 AM EDT.

Other locations in the path of this storm include Coldwater.

This includes Interstate 69 in Michigan between mile markers 4 and
15.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

A Severe Thunderstorm Watch remains in effect until 500 AM EDT for
southwestern Michigan.

&&

LAT...LON 4187 8544 4195 8544 4199 8492 4179 8492
TIME...MOT...LOC 0734Z 271DEG 44KT 4190 8538

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

FISHER

Special weather statement, Aug 12, 3:04 AM EST, 1 hour 32 minutes before

Special Weather Statement
National Weather Service Northern Indiana
404 AM EDT Thu Aug 12 2021

INZ003-012-013-120830-
La Porte IN-Starke IN-Pulaski IN-
404 AM EDT Thu Aug 12 2021

...Strong thunderstorms will impact portions of western Pulaski,
western Starke and La Porte Counties through 430 AM EDT/330 AM
CDT/...

At 404 AM EDT/304 AM CDT/, Doppler radar was tracking strong
thunderstorms along a line extending from near Beverly Shores to near
Dunns Bridge to near Collegeville. Movement was east at 40 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Strong thunderstorms will be near...
  Westville, Trail Creek and La Crosse around 410 AM EDT.
  La Porte and North Judson around 420 AM EDT.

Other locations in the path of these storms include Knox and
Francesville.

This includes the following highways...
 Interstate 80 in Indiana between mile markers 38 and 54.
 Interstate 94 in Indiana between mile markers 33 and 39.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A Severe Thunderstorm Watch remains in effect until 500 AM EDT/400 AM
CDT/ for northwestern Indiana.

&&

LAT...LON 4169 8693 4169 8658 4125 8661 4091 8677
      4091 8693
TIME...MOT...LOC 0804Z 271DEG 34KT 4162 8697 4127 8699 4093 8723

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

FISHER

Special weather statement, Aug 12, 3:28 AM EST, 1 hour 8 minutes before

Special Weather Statement
National Weather Service Northern Indiana
428 AM EDT Thu Aug 12 2021

INZ003-004-012>015-120900-
La Porte IN-St. Joseph IN-Marshall IN-Fulton IN-Starke IN-Pulaski IN-
428 AM EDT Thu Aug 12 2021

...Strong thunderstorms will impact portions of southwestern St.
Joseph, northern Pulaski, northwestern Fulton, Starke, Marshall and
central La Porte Counties through 500 AM EDT/400 AM CDT/...

At 428 AM EDT/328 AM CDT/, Doppler radar was tracking strong
thunderstorms along a line extending from near Westville to Hamlet to
near Medaryville. Movement was east at 50 mph.

HAZARD...Wind gusts of 50 to 55 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Strong thunderstorms will be near...
  Hamlet around 435 AM EDT.
  La Porte, Walkerton and Koontz Lake around 440 AM EDT.
  Plymouth and North Liberty around 445 AM EDT.

Other locations in the path of these storms include Culver, Lakeville
and Argos.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A Severe Thunderstorm Watch remains in effect until 500 AM EDT/400 AM
CDT/ for north central and northwestern Indiana.

&&

LAT...LON 4111 8693 4136 8666 4152 8693 4157 8693
      4166 8644 4150 8617 4109 8628
TIME...MOT...LOC 0828Z 248DEG 41KT 4157 8692 4137 8660 4112 8684

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

FISHER

Special weather statement, Aug 12, 4:15 AM EST, 21 minutes before

Special Weather Statement
National Weather Service Northern Indiana
515 AM EDT Thu Aug 12 2021

INZ005-006-008-121000-
Lagrange IN-Noble IN-Elkhart IN-
515 AM EDT Thu Aug 12 2021

...A strong thunderstorm will impact portions of eastern Elkhart,
northern Noble and Lagrange Counties through 600 AM EDT...

At 514 AM EDT, Doppler radar was tracking a strong thunderstorm over
Goshen, moving east at 45 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

This strong thunderstorm will be near...
  Millersburg around 525 AM EDT.
  Ligonier and Topeka around 530 AM EDT.

Other locations in the path of this storm include Lagrange and Rome
City.

This includes Interstate 80 in Indiana between mile markers 123 and
132.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4147 8519 4145 8591 4169 8593 4176 8529
      4176 8520
TIME...MOT...LOC 0914Z 264DEG 41KT 4155 8582

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

JBALL

The radar

The Northern Indiana radar (KIWX), 54 km away, was scanning. The volume nearest the first event began at 09:36 UTC.

Open the radar archive at this moment

Event by event

17 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, St. Joseph

When: August 12, 4:36 AM EST to 4:37 AM EST
Where: St. Joseph County, 0.69 mi N of Constantine
Measured: 52 kt (60 mph) estimated gust
Reported by: Public
Coordinates: 41.840, -85.670

Rotted tree snapped in half.

Thunderstorm Wind, St. Joseph

When: August 12, 4:39 AM EST to 4:45 AM EST
Where: St. Joseph County, 0.52 mi W of White Pigeon
Measured: 56 kt (64 mph) estimated gust
Reported by: Public
Coordinates: 41.800, -85.640

Trees down across the town of White Pigeon.

Thunderstorm Wind, St. Joseph

When: August 12, 4:46 AM EST to 4:50 AM EST
Where: St. Joseph County, Sturgis
Measured: 61 kt (70 mph) estimated gust
Reported by: Public
Coordinates: 41.800, -85.420

Trees down and power outages across Sturgis.

Thunderstorm Wind, St. Joseph

When: August 12, 4:46 AM EST to 4:55 AM EST
Where: St. Joseph County, 2.07 mi NE of Kirsch Muni Arpt
Measured: 61 kt (70 mph) estimated gust
Reported by: Public
Coordinates: 41.840, -85.420

Several large 200 year old oak trees uprooted or snapped, approximately 1-3 feet diameter. Numerous 1-2 foot diameter limbs down. Trees appeared healthy. Water from the lake moving inland into the backyards of properties.

Thunderstorm Wind, St. Joseph

When: August 12, 4:53 AM EST to 5:00 AM EST
Where: St. Joseph County, 2.17 mi WSW of Kings Mill
Measured: 61 kt (70 mph) estimated gust
Reported by: Trained Spotter
Coordinates: 42.010, -85.410

Numerous trees down or damaged from M60 at the St. Joseph-Branch county line, west to M66, and then south to Sturgis.

Thunderstorm Wind, St. Joseph

When: August 12, 4:57 AM EST to 5:00 AM EST
Where: St. Joseph County, 0.69 mi N of Colon
Measured: 61 kt (70 mph) estimated gust
Property damage: $15,000
Reported by: Broadcast Media
Coordinates: 41.960, -85.320

Two foot diameter healthy tree snapped in half, and thrown into a house causing roof and gutter damage.

Thunderstorm Wind, St. Joseph

When: August 12, 4:57 AM EST to 5:00 AM EST
Where: St. Joseph County, 0.69 mi S of Findley
Measured: 61 kt (70 mph) estimated gust
Property damage: $15,000
Reported by: Broadcast Media
Coordinates: 41.890, -85.370

Healthy 1 to 3 ft diameter tree uprooted and downed on a garage. A tree with partial rotting was snapped at the base and the top limbs damaged a house. Several smaller 3 to 6 inch limbs down around porperty. Powerlines bent or down as well.

Thunderstorm Wind, Branch

When: August 12, 5:04 AM EST to 5:05 AM EST
Where: Branch County, 0.86 mi NW of Coldwater
Measured: 56 kt (64 mph) estimated gust
Reported by: Public
Coordinates: 41.960, -85.010

Trees downed on Union City Road and State Road.

Thunderstorm Wind, Branch

When: August 12, 5:07 AM EST to 5:10 AM EST
Where: Branch County, 0.69 mi N of Matteson
Measured: 61 kt (70 mph) estimated gust
Reported by: Public
Coordinates: 41.940, -85.200

Trees uprooted or snapped. Roof blown off. Reported from MPing.

Thunderstorm Wind, Branch

When: August 12, 5:08 AM EST to 5:09 AM EST
Where: Branch County, Coldwater Arpt
Measured: 51 kt (59 mph) measured gust
Reported by: AWOS
Coordinates: 41.930, -85.050

Thunderstorm Wind, Branch

When: August 12, 5:10 AM EST to 5:11 AM EST
Where: Branch County, 0.69 mi S of Coldwater
Measured: 56 kt (64 mph) estimated gust
Property damage: $10,000
Reported by: Public
Coordinates: 41.940, -85.000

One to two foot diameter tree and several limbs down on a house causing gutter and siding damage.

Thunderstorm Wind, Hillsdale

When: August 12, 5:18 AM EST to 5:20 AM EST
Where: Hillsdale County, 1.72 mi SE of Bankers
Measured: 56 kt (64 mph) estimated gust
Property damage: $3,000
Reported by: Trained Spotter
Coordinates: 41.880, -84.680

Numerous branches down, damaging a car. Estimated 12-14 inches in diameter. Tree uprooted.

Thunderstorm Wind, Hillsdale

When: August 12, 5:18 AM EST to 5:20 AM EST
Where: Hillsdale County, 2.31 mi SSE of Bankers
Measured: 56 kt (64 mph) estimated gust
Reported by: Trained Spotter
Coordinates: 41.870, -84.680

Tree tops snapped and trees uprooted. Wires down.

Thunderstorm Wind, Hillsdale

When: August 12, 5:20 AM EST to 5:25 AM EST
Where: Hillsdale County, 1.38 mi N of Moscow
Measured: 61 kt (70 mph) estimated gust
Property damage: $15,000
Reported by: Trained Spotter
Coordinates: 42.070, -84.500

Three foot diameter tree snapped. Large 1-2 ft diameter limb down. Power pole snapped and leaning on a house. Damage along Mosherville Rd at 2 separate residences.

Thunderstorm Wind, Hillsdale

When: August 12, 5:23 AM EST to 5:25 AM EST
Where: Hillsdale County, 1.03 mi W of Hillsdale
Measured: 56 kt (64 mph) estimated gust
Reported by: Public
Coordinates: 41.920, -84.640

Three inch tree limbs broken. Power poles broken. Report from MPing.

Thunderstorm Wind, Hillsdale

When: August 12, 5:25 AM EST to 5:30 AM EST
Where: Hillsdale County, 1.24 mi NW of Hillsdale
Measured: 56 kt (64 mph) estimated gust
Reported by: Public
Coordinates: 41.930, -84.640

Multiple trees down in Hillsdale.

Thunderstorm Wind, Hillsdale

When: August 12, 5:20 PM EST to 5:22 PM EST
Where: Hillsdale County, Jerome
Measured: 56 kt (64 mph) estimated gust
Reported by: Trained Spotter
Coordinates: 42.030, -84.470

A few trees down.

What these are

Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Michigan in 2021 Every state in 2021 This day in weather history Warnings in Michigan, August 2021

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 981637, 981638, 981639, 981640, 981642, 981643, 981645, 981646, 981651, 981652, 981653, 981655, 981656, 981657, 981659, 981660, 981661.