Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >
Overview
Severe storms developed across portions of the Northern Indiana (IWX) forecast area early on the morning of August 12th, 2021. Wind gusts of 55 to 60 mph were measured, but pockets of higher end severe wind gusts ranging from 65 to 75 mph were estimated based off of the damage reports and photos. Wind damage reports came in from several locations in Northern Indiana and southern Lower Michigan starting from around 5 am EDT and ending around 7:30 am EDT. Counties especially hard hit were Elkhart, Marshall, and Kosciusko Counties in Indiana; in addition to St. Joseph/Branch/Hillsdale Counties in Michigan. Click the tabs below to view photos, radar imagery, storm reports, rainfall amounts, and environmental data from this event. Thank you to those who submitted photos and reports of wind speeds and damage, in addition to storm photos and rainfall reports.
Downburst
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Downburst - Sturgis, MI
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Measured Wind Gusts
Below are the wind gusts that were actually measured by weather stations during the August 12th, 2021 damaging wind event. Isolated pockets of much higher wind gusts ranging from 65 to 75 mph were estimated by the damage produced from the storms (see storm report and photos tab).
NOUS43 KIWX 130512 PNSIWX INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005-015- 016-024-025-131712- PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE NORTHERN INDIANA 112 AM EDT FRI AUG 13 2021 ...HIGHEST MEASURED WIND REPORTS AUGUST 12TH 2021... LOCATION SPEED TIME/DATE LAT/LON ...INDIANA... ...ELKHART COUNTY... GOSHEN 43 MPH 0523 AM 08/12 41.53N/85.78W 2.6 SW SIMONTON LAKE (INDOT) 41 MPH 0534 AM 08/12 41.72N/86.01W ...FULTON COUNTY... 1 NNW ATHENS 57 MPH 0644 AM 08/12 41.07N/86.13W 2 NW ROCHESTER 55 MPH 0636 AM 08/12 41.08N/86.22W 4 W ROCHESTER 54 MPH 0630 AM 08/12 41.05N/86.27W ...KOSCIUSKO COUNTY... 2 N NORTH WEBSTER 53 MPH 0722 AM 08/12 41.36N/85.70W WARSAW MUNICIPAL AP 45 MPH 0655 AM 08/12 41.27N/85.83W 1 S MONOQUET 45 MPH 0655 AM 08/12 41.27N/85.86W ...STEUBEN COUNTY... ANGOLA 52 MPH 0835 AM 08/12 41.63N/85.08W ...WHITE COUNTY... MONTICELLO - WHITE COUNTY AR 45 MPH 0615 AM 08/12 40.72N/86.77W ...WHITLEY COUNTY... 4.5 S COLUMBIA CITY 40 MPH 0715 AM 08/12 41.09N/85.47W ...MICHIGAN... ...BRANCH COUNTY... 2 WSW COLDWATER 59 MPH 0608 AM 08/12 41.93N/85.05W 1.6 NW BATAVIA (MAWN) 46 MPH 0700 AM 08/12 41.93N/85.11W ...HILLSDALE COUNTY... 3 E HILLSDALE 54 MPH 0630 AM 08/12 41.92N/84.58W JEROME 45 MPH 0640 AM 08/12 42.02N/84.46W HILLSDALE 41 MPH 0654 AM 08/12 41.92N/84.58W ...ST. JOSEPH COUNTY... STURGIS KIRSCH 54 MPH 0555 AM 08/12 41.80N/85.43W 1 NW STURGIS 54 MPH 0555 AM 08/12 41.81N/85.44W OBSERVATIONS ARE COLLECTED FROM A VARIETY OF SOURCES WITH VARYING EQUIPMENT AND EXPOSURES. WE THANK ALL VOLUNTEER WEATHER OBSERVERS FOR THEIR DEDICATION. NOT ALL DATA LISTED ARE CONSIDERED OFFICIAL. $$
Photos
Wind Damage Photos from August 12th, 2021
Photos from the August 12th, 2021 straight-line wind event are below. Thank you to those who submitted them! If you have pictures of damage or storms that you want us to see, send it to our email account (nws.northernindiana@noaa.gov) or post it on our Twitter (@NWSIWX) or Facebook. Remember to use the TEL method when you submit your report, including the Time, Event, & Location. Unfortunately, at the time of the event and through August 13th, our phone system went down and many folks reported only having a busy signal when they tried to call. We apologize for any inconvenience this may have caused.
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| Wind Damage in Goshen, IN (Twitter User @GHSWx) |
Wind Damage 1.5 NE of Moscow, MI (Scott Taylor) |
Wind Damage 1.5 NE of Moscow, MI (Scott Taylor) |
Wind Damage in Colon, MI (Tom Talbot) |
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| Wind Damage in Findley, MI (Tom Talbot) |
Wind Damage in Sturgis, MI (Jessa Vanites) |
Wind Damage in Sturgis, MI (Jessa Vanites) |
Wind Damage in Bristol, IN (Jen Yoder) |
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| Wind Damage in Bristol, IN (Mike Yoder) |
Wind Damage in Bristol, IN (Mike Yoder) |
Damage in Hillsdale/Jonesville, MI (Rene Philips) |
Damage in Hillsdale/Jonesville, MI (Rene Philips) |
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| Wind Damage in Mentone, IN (Nick Deraneck) |
Wind Damage in Mentone, IN (Nick Deraneck) |
Wind Damage in Mentone, IN (Nick Deraneck) |
Wind Damage in Winona Lake, IN (Roger Grossman) |
Radar
Radar Loops from August 12th, 2021
A radar velocity and reflectivity loop from KIWX (images created with GR2Analyst) of the storms moving through portions of the Northern Indiana Forecast area (map). Click the square on each loop to expand it. The left loop was from 5 am-6:53 am EDT. The loop on the right was from 5:40 am-7:24 am EDT August 12th, 2021. Each loop focuses on a different area of storms, so the times overlap slightly.
Storm Reports
PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE NORTHERN INDIANA 415 PM EDT MON AUG 16 2021 /315 PM CDT MON AUG 16 2021/ ...PUBLIC INFORMATION STATEMENT... ...FINAL SUMMARY OF STORM DAMAGE OCCURRING DURING EARLY MORNING HOURS OF AUGUST 12, 2021... THUNDERSTORMS BROUGHT YET ANOTHER ROUND OF DAMAGING TO NORTHERN INDIANA AND FAR SOUTHERN LOWER MICHIGAN DURING THE EARLY MORNING HOURS OF AUGUST 12, 2021. AFTER EXTENSIVE REVIEW OF DATA FROM EMERGENCY MANAGEMENT OFFICIALS AS WELL AS SPOTTERS AND THE PUBLIC WHO HAVE SHARED THEIR DAMAGE DETAILS, IT HAS BEEN DETERMINED THAT ALL DAMAGE APPEARS TO BE RELATED TO STRAIGHT LINE WINDS OR DOWNBURSTS. THE WINDS CAUSED TREE, TREE LIMB, POWER LINE AND POLE DAMAGE WITH REPORTS OF STRUCTURE DAMAGE GENERALLY COMING FROM FALLING TREES OR TREE LIMBS. WHILE AREAS OF DAMAGE WERE REPORTED IN PORTIONS OF KOSCIUSKO, MARSHALL AND ELKHART COUNTIES IN INDIANA, THE GREATEST DAMAGE HAS BEEN REPORTED IN PORTIONS OF ST. JOSEPH, BRANCH AND HILLSDALE COUNTIES IN MICHIGAN. WINDS SPEEDS FOR MUCH OF THE DAMAGE ARE ESTIMATED FROM 60 TO AS HIGH AS 75 MPH. HOWEVER, A FEW INSTANCES OF MORE INTENSE DOWNBURST DAMAGE WERE OBSERVED. BELOW ARE ADDITIONAL DETAILS ON AREAS OF MORE SIGNIFICANT DAMAGE OR REPORTS OF WEATHER RELATED INJURIES. THIS IS THE FINAL UPDATE TO THE AUGUST 12, 2021 STORM DAMAGE SUMMARY. .ELKHART COUNTY, INDIANA THREE PEOPLE WERE INJURED ON COUNTY ROAD 1, NORTH OF WYNDTREE BOULEVARD WHEN A VEHICLE STRUCK A TREE IN THE ROADWAY. THE DRIVER AND TWO PASSENGERS WERE TAKEN TO LOCAL HOSPITALS WITH UNKNOWN INJURIES. IN THE TOWN OF BRISTOL, SEVERAL TREES WERE UPROOTED IN A NEIGHBORHOOD NEAR BRISTOL ELEMENTARY SCHOOL IN ADDITION TO CONGDON PARK ALONG THE ELKHART RIVER. TWO HOMES WERE DAMAGED NEAR THE ELEMENTARY SCHOOL WHEN LARGE TREES UPROOTED DURING THE STORM FELL ONTO THE ROOFS. DUE SOUTH OF THE SCHOOL, A BUSINESS HAD PART OF THEIR METAL ROOF BLOWN OFF. ADDITIONAL CONSIDERABLE TREE AND POWER LINE DAMAGE WAS NOTED AT THE INTERSECTION OF ST. JOESPH AND ELM STREET, WHERE AN UPROOTED TREE OF AN ESTIMATED 5-6 FT IN DIAMETER FELL ON POWER LINES. NUMEROUS BRANCHES AND TREE LIMBS WERE ALSO DOWN ONTO POWER LINES THROUGHOUT THE CITY OF BRISTOL, PRIMARILY CONCENTRATED ON THE NORTHWEST SIDE OF TOWN. MAXIMUM ESTIMATED WIND SPEEDS OF UP TO 75 MPH APPEAR LIKELY IN SPOTS. .ST JOSEPH COUNTY, MICHIGAN SIGNIFICANT DAMAGE APPEARS TO HAVE OCCURRED IN EASTERN ST. JOSEPH COUNTY IN A SWATH FROM WHITE PIGEON AND CONSTANTINE NORTHEAST TO CENTREVILLE, STURGIS AND COLON. DETAILS FROM THE CITY OF STURGIS AS WELL AS ST. JOSEPH COUNTY EMERGENCY MANAGEMENT INDICATES THAT WIDESPREAD TREE DAMAGE BETWEEN STURGIS AND CENTREVILLE HAS CAUSED RESULTING IN DAMAGE TO OVER 15 MILES OF POWER LINES AND OVER 40 POWER POLES BEING SNAPPED. GROUND AND AERIAL PICTURES OF THE DAMAGE CLEARLY INDICATE STRONG DOWNBURST WINDS SNAPPING OR LEVELING AREAS OF TREES, NUMBERING WELL OVER 100 IN SPOTS. WIND SPEEDS IN THESE AREAS ARE ESTIMATED BETWEEN 85 TO OVER 90 MPH. .BRANCH COUNTY, MICHIGAN BRANCH COUNTY EMERGENCY MANAGEMENT, WITH THE ASSISTANCE OF THE MICHIGAN STATE POLICE, PERFORMED A AERIAL ASSESSMENT OF DAMAGE FROM COLDWATER, SOUTHEAST TO MARBLE LAKE AND THEN NORTH TO QUINCY. SMALL AREAS OF TREE AND CROP DAMAGE WERE NOTED BETWEEN COLDWATER AND MARBLE LAKE, CONSISTENT WITH WIND SPEEDS OF 60 TO AT MOST 70 MPH. THE AMOUNT OF TREE DAMAGE DID INCREASE SOMEWHAT ON THE NORTHEAST SIDE OF MARBLE LAKE, WITH SEVERAL FALLING ONTO HOMES. SOME FIELDS IN THE AREA SHOWN SOME FLATTENED CORN. WIND SPEEDS IN THE AREA OF MARBLE LAKE WERE LIKELY CLOSER TO 70 MPH. .HILLSDALE COUNTY, MICHIGAN THE SOUTHWEST FACING PORTION OF THE ROOF OF THE JONESVILLE CITY HALL WAS LIFTED UP AND OVER THE BUILDING, LANDING ROUGHLY 80 FEET INTO A NEARBY PARK. THE CITY'S WEATHER SIREN, LOCATED AT THE TOP OF CITY HALL, WAS ALSO BLOWN OFF. NO OTHER STRUCTURE DAMAGE, NOR SIGNIFICANT TREE DAMAGE, WAS NOTED IN THE CITY. A COMBINATION OF WHAT WAS REPORTED AS POOR CONDITION TO THE ROOF, HIGHER ELEVATION OF THE TOWN AND THE BUILDING, AS WELL AS WIND FLOW UNDER THE LIP OF THE ROOF, ALL LED TO THE ROOF FAILURE. WIND SPEEDS ARE ESTIMATED BETWEEN 60 AND 70 MPH. WIDESPREAD DAMAGE WAS REPORTED ACROSS MAINLY WESTERN AND NORTHERN PORTIONS OF THE COUNTY WITH DOWNED TREES BLOCKING ROADWAYS, LANDING ON HOMES OR VEHICLES. MANY POWER LINES WERE REPORTED DOWN AS WELL, MAINLY FROM FALLING TREES OR TREE LIMBS. WIND SPEEDS ARE ESTIMATED FROM 60 MPH TO 70 MPH. THE AERIAL SURVEY FROM BRANCH COUNTY DID EXTEND OVER INTO HILLSDALE COUNTY IN AND NORTHWEST OF JONESVILLE. IN ADDITION TO FLYING OVER THE CITY OF JONESVILLE, AREAS TO THE NORTHWEST OF THE CITY WERE LOOKED AT. A FEW CORN FIELDS SHOWED EXTENSIVE DAMAGE WITH THE CORN FLATTENED IN NEARLY ALL OF ONE FIELD AND NEARLY THREE QUARTERS OF ANOTHER FIELD NEARBY. OF NOTE IS TREES SURROUNDING THESE FIELDS SHOWED NO DAMAGE AND IN ONE FIELD THE CROPS WERE ACTUALLY PARTIALLY SHELTERED FROM THE STRONG WINDS. $$ FISHER
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NORTHERN INDIANA
152 AM EDT FRI AUG 13 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0445 AM TSTM WND DMG 2 E WALKERTON 41.47N 86.44W
08/12/2021 MARSHALL IN EMERGENCY MNGR
ROAD CLOSED DUE TO TREES DOWN.
0450 AM TSTM WND DMG 2 NE TWIN LAKES 41.32N 86.34W
08/12/2021 MARSHALL IN EMERGENCY MNGR
ROAD CLOSED DUE TO TREES DOWN.
0450 AM TSTM WND DMG 2 N DONALDSON 41.39N 86.44W
08/12/2021 MARSHALL IN EMERGENCY MNGR
ROAD CLOSED DUE TO TREES DOWN.
0455 AM TSTM WND DMG 1 SSE LINKVILLE 41.40N 86.27W
08/12/2021 MARSHALL IN EMERGENCY MNGR
ROAD CLOSED DUE TO DOWNED TREES.
0515 AM TSTM WND DMG 1 NNE WATERFORD MILLS 41.56N 85.82W
08/12/2021 ELKHART IN TRAINED SPOTTER
HEALTHY TREE SNAPPED AT THE BASE AND DOWN ON
A FENCE. PHOTO VIA EMAIL.
0515 AM TSTM WND DMG GOSHEN 41.58N 85.83W
08/12/2021 ELKHART IN NWS EMPLOYEE
SEVERAL LARGE TREE BRANCHES DOWN ACROSS THE
SOUTH SIDE OF CITY. POWER OUTAGES.
0530 AM TSTM WND DMG BRISTOL 41.72N 85.82W
08/12/2021 ELKHART IN BROADCAST MEDIA
HEALTHY PINE TREE SPLIT NEAR THE BASE, TREE
LEANING ON POWER LINE. PHOTO VIA EMAIL.
0532 AM TSTM WND DMG 1 E BRISTOL 41.72N 85.79W
08/12/2021 ELKHART IN BROADCAST MEDIA
HEALTHY PINE TREE SNAPPED AND DOWN ON A
MOBILE HOME. UNKNOWN IF THERE ARE INJURIES.
0536 AM TSTM WND DMG CONSTANTINE 41.84N 85.67W
08/12/2021 ST. JOSEPH MI PUBLIC
DELAYED REPORT. ROTTED TREE SNAPPED IN HALF.
0539 AM TSTM WND DMG WHITE PIGEON 41.80N 85.64W
08/12/2021 ST. JOSEPH MI PUBLIC
TREES DOWN IN THE TOWN OF WHITE PIGEON.
0546 AM TSTM WND DMG 3 N STURGIS 41.84N 85.42W
08/12/2021 ST. JOSEPH MI PUBLIC
DELAYED REPORT. SEVERAL LARGE 200 YEAR OLD
OAK TREES UPROOTED OR SNAPPED, APPROXIMATELY
1-3 FT IN DIAMETER. NUMEROUS 1-2 FT DIAMETER
LIMBS DOWNED. TREES APPEAR HEALTHY. WATER
FROM THE LAKE MOVING INLAND ONTO THE
BACKYARD OF THE PROPERTY.
0546 AM TSTM WND DMG STURGIS 41.80N 85.42W
08/12/2021 ST. JOSEPH MI PUBLIC
TREES DOWN AND POWER OUTAGES IN STURGIS.
0553 AM TSTM WND DMG 2 E MENDON 42.01N 85.41W
08/12/2021 ST. JOSEPH MI TRAINED SPOTTER
NUMEROUS TREES DOWN OR DAMAGED ON A DRIVE
FROM M60 AT THE ST. JOSEPH CO-BRANCH CO
LINE, WEST TO M66, AND THEN SOUTH ON M66 TO
STURGIS. LSR IS AT THE INTERSECTION OF M60
AND M66.
0557 AM TSTM WND DMG COLON 41.96N 85.32W
08/12/2021 ST. JOSEPH MI BROADCAST MEDIA
DELAYED REPORT. 2 FT DIAMETER HEALTHY TREE
SNAPPED IN HALF. TOP HALF WAS THROWN INTO A
HOUSE, CAUSING ROOF AND GUTTER DAMAGE.
0557 AM TSTM WND DMG FINDLEY 41.89N 85.37W
08/12/2021 ST. JOSEPH MI BROADCAST MEDIA
DELAYED REPORT. HEALTHY 1 TO 3 FT DIAMETER
TREE UPROOTED AND DOWNED ON A GARAGE.
NEARBY, A TREE WITH PARTIAL ROTTING WAS
SNAPPED AT THE BASE AND THE TOP LIMBS DID
DAMAGE TO A HOUSE. SEVERAL SMALLER 3-6 INCH
LIMBS DOWNED AROUND THE PROPERTY. POWERLINES
BENT OR DOWNED AS WELL.
0604 AM TSTM WND DMG 1 NNW COLDWATER 41.96N 85.01W
08/12/2021 BRANCH MI PUBLIC
TREES DOWN ON UNION CITY ROAD AND STATE
ROAD.
0605 AM TSTM WND GST 1 SSW COLDWATER LAKE 41.81N 84.99W
08/12/2021 M37 MPH BRANCH MI PUBLIC
DELAYED REPORT. MULTIPLE 3- TO 4-INCH
DIAMETER BRANCHES DOWN.
0607 AM TSTM WND DMG WINAMAC 41.05N 86.60W
08/12/2021 PULASKI IN TRAINED SPOTTER
REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN;
POWER POLES BROKEN. TIME ESTIMATED FROM
RADAR.
0607 AM TSTM WND DMG WINAMAC 41.05N 86.60W
08/12/2021 PULASKI IN BROADCAST MEDIA
CORRECTS PREVIOUS TSTM WND DMG REPORT FROM
WINAMAC. TREES DOWN ON 12TH AND MARKET
STREET IN WINAMAC.
0607 AM TSTM WND DMG 1 NNE MATTESON LAKE 41.94N 85.20W
08/12/2021 BRANCH MI PUBLIC
REPORT FROM MPING: TREES UPROOTED OR
SNAPPED; ROOF BLOWN OFF.
0610 AM TSTM WND DMG COLDWATER 41.94N 85.00W
08/12/2021 BRANCH MI PUBLIC
DELAYED. 1 TO 2 FT DIAMETER TREE AND SEVERAL
LIMBS DOWNED ON A HOUSE, CAUSING GUTTER AND
SIDING DAMAGE.
0611 AM TSTM WND DMG WINAMAC 41.05N 86.60W
08/12/2021 PULASKI IN BROADCAST MEDIA
TREES DOWN ON 12TH AND MARKET STREET IN
WINAMAC.
0618 AM TSTM WND DMG LAKE WILSON 41.88N 84.68W
08/12/2021 HILLSDALE MI TRAINED SPOTTER
NUMEROUS BRANCHES DOWN. ESTIMATED 12-14IN
DIAMETER BRANCH DOWN DAMAGING A CAR. TREE
UPROOTED. PHOTOS VIA EMAIL.
0618 AM TSTM WND DMG LAKE WILSON 41.87N 84.68W
08/12/2021 HILLSDALE MI TRAINED SPOTTER
CORRECTS PREVIOUS TSTM WND DMG REPORT FROM
LAKE WILSON. TREE TOPS SNAPPED AND TREES
UP-ROOTED. WIRES DOWN. TIME IS ESTIMATED
FROM RADAR.
0620 AM TSTM WND DMG 1 NNE MOSCOW 42.07N 84.50W
08/12/2021 HILLSDALE MI TRAINED SPOTTER
CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1
NNE MOSCOW. DELAYED REPORT. 3 FT DIAMETER
TREE SNAPPED, LARGE 1-2 FT DIAMETER LIMB
DOWNED. A POWER POLE WAS ALSO SNAPPED AND
LEANING ON A HOUSE. DAMAGE WAS ALONG
MOSHERVILLE RD AT TWO SEPARATE RESIDENCES
NEAR BIBBINS RD.
0620 AM TSTM WND DMG LAKE WILSON 41.87N 84.68W
08/12/2021 HILLSDALE MI TRAINED SPOTTER
TREE TOPS SNAPPED AND TREES UP-ROOTED. WIRES
DOWN. TIME IS ESTIMATED FROM RADAR.
0623 AM TSTM WND DMG HILLSDALE 41.92N 84.64W
08/12/2021 HILLSDALE MI PUBLIC
REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN;
POWER POLES BROKEN.
0625 AM TSTM WND DMG HILLSDALE 41.93N 84.64W
08/12/2021 HILLSDALE MI PUBLIC
MULTIPLE TREES DOWN IN THE TOWN OF HILLSDALE
RELAYED VIA FACEBOOK.
0632 AM TSTM WND DMG ROCHESTER 41.06N 86.20W
08/12/2021 FULTON IN BROADCAST MEDIA
MULTIPLE TREES DOWN IN AND AROUND ROCHESTER.
0635 AM TSTM WND DMG MENTONE 41.17N 86.04W
08/12/2021 KOSCIUSKO IN BROADCAST MEDIA
METAL SHED TOSSED AND HIT A HOME IN MENTONE.
0637 AM TSTM WND DMG BURKET 41.15N 85.97W
08/12/2021 KOSCIUSKO IN BROADCAST MEDIA
SIGNIFICANT TREE DAMAGE IN BURKET. VIA CHAT.
TIME FROM RADAR.
0639 AM TSTM WND DMG PALESTINE 41.18N 85.95W
08/12/2021 KOSCIUSKO IN BROADCAST MEDIA
LARGE TREE LIMB DOWN ONTO A PICK UP TRUCK.
NO INJURIES. TIME ESTIMATED FROM RADAR.
0644 AM TSTM WND DMG BURKET 41.15N 85.97W
08/12/2021 KOSCIUSKO IN BROADCAST MEDIA
MULTIPLE TREES DOWN AROUND TOWN.
0651 AM TSTM WND DMG 1 NNW WINONA LAKE 41.23N 85.82W
08/12/2021 KOSCIUSKO IN BROADCAST MEDIA
TREES DOWN IN THE WARSAW AND WINONA LAKE
AREA.
0700 AM TSTM WND DMG 1 NNW NORTH WEBSTER 41.34N 85.70W
08/12/2021 KOSCIUSKO IN NWS EMPLOYEE
TREE TOPPED IN THE AREA. NUMEROUS SMALL
LIMBS DOWN IN THE AREA. TIME ESTIMATED FROM
RADAR.
0730 AM TSTM WND DMG 1 NE LAKE WAWASEE 41.41N 85.70W
08/12/2021 KOSCIUSKO IN PUBLIC
A BOAT LIFT COVER DAMAGE AND TREE UPROOTED
ON THE EASTERN BANK OF LAKE WAWASEE.
0755 AM TSTM WND DMG 5 SSE EDGERTON 41.38N 84.73W
08/12/2021 DEFIANCE OH EMERGENCY MNGR
MULTIPLE REPORTS OF TREES DOWN IN MILFORD
TOWNSHIP.
&&
$$
Rain Reports
PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE NORTHERN INDIANA 134 AM EDT FRI AUG 13 2021 ...MAX 24 HOUR PRECIPITATION REPORTS AUGUST 12TH 2021... LOCATION AMOUNT TIME/DATE LAT/LON ...INDIANA... ...ELKHART COUNTY... GOSHEN 3 SW 1.15 IN 0700 PM 08/12 41.56N/85.88W GOSHEN 0.47 IN 1253 AM 08/13 41.53N/85.78W JAMESTOWN 0.36 IN 0118 AM 08/13 41.64N/86.04W 1.9 W ELKHART 0.26 IN 1158 PM 08/12 41.68N/86.00W ...FULTON COUNTY... 3 W ROCHESTER 1.06 IN 0110 AM 08/13 41.05N/86.26W ATHENS 0.69 IN 0110 AM 08/13 41.07N/86.13W ...KOSCIUSKO COUNTY... LEESBURG 0.82 IN 0118 AM 08/13 41.31N/85.72W 5.5 NNE WARSAW 0.79 IN 0115 AM 08/13 41.33N/85.77W 2.3 N NORTH WEBSTER 0.72 IN 1158 PM 08/12 41.36N/85.70W 1 SW SEVASTOPOL 0.28 IN 0114 AM 08/13 41.11N/86.04W ...LAGRANGE COUNTY... LAGRANGE 0.75 IN 0120 AM 08/13 41.65N/85.40W ...NOBLE COUNTY... KENDALLVILLE 0.86 IN 0115 AM 08/13 41.45N/85.23W ...PULASKI COUNTY... MONTEREY 0.43 IN 0115 AM 08/13 41.11N/86.52W ...STEUBEN COUNTY... ANGOLA 0.64 IN 0118 AM 08/13 41.66N/85.02W ...WHITE COUNTY... BURNETTSVILLE 9.9 NNW 0.39 IN 0143 PM 08/12 40.90N/86.65W ...WHITLEY COUNTY... 4.5 S COLUMBIA CITY 0.29 IN 0115 AM 08/13 41.09N/85.47W ...MICHIGAN... ...BERRIEN COUNTY... 0.7 SW NILES 0.38 IN 0200 PM 08/12 41.83N/86.26W NILES 0.37 IN 0117 AM 08/13 41.83N/86.27W ...HILLSDALE COUNTY... JEROME 0.84 IN 0116 AM 08/13 42.02N/84.46W ...ST. JOSEPH COUNTY... STURGIS KIRSCH 0.66 IN 0115 AM 08/13 41.80N/85.43W 2.0 SE MENDON 0.51 IN 0100 AM 08/13 41.98N/85.43W OBSERVATIONS ARE COLLECTED FROM A VARIETY OF SOURCES WITH VARYING EQUIPMENT AND EXPOSURES. WE THANK ALL VOLUNTEER WEATHER OBSERVERS FOR THEIR DEDICATION. NOT ALL DATA LISTED ARE CONSIDERED OFFICIAL. $$
Environment
Initially storms struggled to get going during the late evening and overnight hours, despite an intense low level jet and moisture transport into the area (Fig. 1). Precipitable water at the time of the event was up to around 2.1 inches (Fig. 2), which is around 150-175% percent of normal for this time of year. This was because we initially had little forcing to get anything more than elevated non-severe storms in southern MI, and there was a capping inversion in place (CIN in Fig. 3) . By morning however, the mid level trough (Fig. 4) approached the area and gave us enough lift to overcome this and access the instability in the low levels (MLCAPE in Fig. 3) despite it being so early in the morning when it's typically difficult to get storms like these because it is often so stable. This allowed the storms to intensify rapidly and produce damaging winds. To learn more about thunderstorm ingredients and lifecycle, check out our spotter training video here.
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| Figure 1: 5 am EDT 8/12/21: 850 mb Moisture transport (fill and vector), height (black), and theta-e (dashed green). Image from SPC Mesoanalysis Archive. | Figure 2: 6 am EDT 8/12/21: Precipitable Water (in) and 850 mb Moisture Transport Vectors. Image from SPC Mesoanalysis Archive. | Figure 3: 6 am EDT 8/12/21: MLCAPE (J/kg, red contour) and MLCIN (J/kg, blue shading). | Figure 4: 6 am EDT 8/12/21: 500mb height (m MSL, black), temp (C, red), and wind (kt, hatched>=40kts). |
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