An east-west boundary and strong mid level wind flow combined with several left-over disturbances from convection to the west, to allow for thunderstorm develop. Some of these storms became severe with damaging winds dominating the reports.
Every event with a place to put it. Tap one for its entry below.
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.
The episode as NWS IWX wrote it up.
An east-west boundary and strong mid level wind flow combined with several left-over disturbances from convection to the west, to allow for thunderstorm develop. Some of these storms became severe with damaging winds dominating the reports.
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 Jun 12, 2:29 PM EST, 5 hours 53 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTHERN INDIANA 329 PM EDT SAT JUN 12 2010 .SHORT TERM... TONIGHT THROUGH SUNDAY NIGHT RAIN CHANCES WILL CONTINUE THROUGH THE PERIOD AS A STATIONARY FRONT WILL CONTINUE TO SETTLE OVER THE REGION. SEVERAL IMPULSES WILL ADVECT ALONG THE FRONTAL BOUNDARY...SUPPORTING RENEWED CONVECTIVE GROWTH AND MCS SYSTEMS. VERY LITTLE CHANGES WERE MADE TO THE FORECAST AS TIMING MESOSCALE DISTURBANCES IS QUITE DIFFICULT GIVEN CONVECTIVE INFLUENCES. VERY LARGE LL THETA-E VALUES IN PLACE PER DEEP MOISTURE...WILL CONTINUE TO SUPPORT VERY HEAVY RAINFALL WITH ANY THUNDERSTORMS. SEVERE THREAT WILL LINGER GIVEN REMNANT EML IN PLACE SUPPORTING MID LEVEL DRY INTRUSIONS...AND GIVEN THE EXCEPTIONAL HIGH PW VALUES SUPPORTING CAPES IN EXCESS OF 3000 J/KG. ONE MAIN INGREDIENT THAT IS MISSING IS AMPLE LL AND DEEP SHEAR WHICH HAS CONTINUED TO REMAIN WELL NORTH AND WEST OF THE FA. UPDRAFT CORES WILL CONTINUE TO STRUGGLE TO MAINTAIN LONGEVITY AND OUTFLOW DOMINANT SYSTEMS ARE EXPECTED TO LACK SUFFICIENT ENVIRONMENTAL SHEAR TO BALANCE COLD POOL GENERATED BAROCLINIC VORTICITY. HENCE...PULSE SEVERE WILL BE THE CONCERN FOR NOW...WITH STRONG WIND GUSTS THE MAIN CONCERN. HAVE FAVORED A GFS/SREF/NAM BLEND IN THE PERIOD. CONVECTIVELY MODIFIED MID LEVEL IMPULSE OVER IA INDICATED IN H5 FLUID TRAPPING ANALYSIS AND WATER VAPOR IMAGERY...WILL CONTINUE TO PUSH EAST AND SUPPORT NUMEROUS SHRA TS THIS AFTERNOON INTO THE EVENING. FRONTAL BOUNDARY WILL SETTLE ACROSS THE AREA WITH BACKED WINDS THIS EVENING AHEAD OF THE IA IMPULSE SUPPORTING STALLING AND POSSIBLE NORTHWARD TREND. HEAVY RAINFALL WILL CONTINUE TO BE A CONCERN WITH PW VALUES AROUND 2 INCHES...SOME 200 PERCENT OF NORMAL. ACTIVITY WILL WANE OVERNIGHT WITH A LULL IN ACTIVITY UNTIL LATE SUN MORNING...WITH BETTER CHANCES FOR PRECIP SUN AFTERNOON WITH A CONVECTIVE RESPONSE GIVEN DIURNAL HEATING AND POSSIBLE MCS OUTFLOW INTERACTING FROM EXPECTED STORMS OVER THE CENTRAL PLAINS SAT NIGHT. HAVE CARRIED A 40 POP NORTH WITH 60 IN THE SOUTH THROUGH TONIGHT GIVEN MCS ACTIVITY THIS EVENING. INCLUDED A RAMP UP IN POPS THROUGH SUN. FORECAST MODELS CONTINUE HIGHLIGHT A STRONG SFC WAVE ADVECTING ALONG THE STALLED FRONT ON SUN NIGHT. HAVE RAISED POPS SUN NIGHT FOR THIS ALTHOUGH HAVE REMAINED BELOW LIKELY AT THIS TIME GIVEN CONCERNS ON CONVECTIVE ENHANCEMENT AND WAVE TIMING ISSUES. AREAS OF FOG WILL BE POSSIBLE TONIGHT NORTH AND ALONG THE SFC FRONT...ESPECIALLY IN THE NW NEAR LK MI. HAVE LEFT FOG MENTION OUT OF THE GRIDS FOR NOW GIVEN CONFIDENCE...ONLY INCLUDING IT IN THE MARINE ZONES. AS FOR TEMPS...HAVE INTRODUCED A COOLING TREND GIVEN CONCERNS ON CLOUD COVER. DID BIAS NW FA COOLING MOST GIVEN LOCATION NORTH OF THE FRONT AND FLOW OFF LAKE MICHIGAN. && .LONG TERM...MONDAY THROUGH SATURDAY DEEP WESTERN CONUS TROUGH WILL MERGE/PHASE WITH ENERGY DROPPING OUT OF SOUTH-CENTRAL CANADA TO DEVELOP AN UPPER LOW SOMEWHERE IN THE VICINITY OF THE NORTHERN PLAINS BY MONDAY. A NEARLY STALLED OUT LOW LEVEL BAROCLINIC ZONE SHOULD BE SITUATED FROM THE NORTHERN OH VALLEY SOUTHWEST INTO THE MID MS VALLEY AND CENTRAL PLAINS BY THIS TIME...LOCATED ON THE SOUTHERN FRINGE OF A BELT OF STRONGER SOUTHWEST WINDS ALOFT. THE FRONTAL BOUNDARY SHOULD LIFT NWD INTO THE FA MONDAY NIGHT INTO TUESDAY AND TUESDAY NIGHT AS THE NORTHERN PLAINS UPPER LOW OPENS UP AND PROPAGATES EASTWARD TOWARDS THE NORTHERN PLAINS IN RESPONSE TO ANOTHER UPPER TROUGH DIGGING INTO THE PAC NW. MEDIUM RANGE MODELS AGREE RELATIVELY WELL ON THIS SYNOPTIC EVOLUTION. HOWEVER...CONFIDENCE IN ANY ONE MODEL SOLUTION AND POPS IN ANY ONE PERIOD CONTINUE TO BE LOW AS MESOSCALE/CONVECTIVE PROCESSES WILL DOMINATE. MONDAY THROUGH TUESDAY NIGHT...A STRONG SHORTWAVE IS FCST TO DIG SEWD THROUGH THE NRN GREAT LAKES AND INTO NEW ENGLAND BY MONDAY. THIS FEATURE WILL LIKELY FORCE A SFC TROUGH/BOUNDARY JUST SOUTH OR OVER OUR SOUTHERN AREAS BY MONDAY AND MONDAY NIGHT. LESS HUMID ENE LOW LEVEL FLOW SHOULD ENSUE AS A SFC ANTICYCLONE SETS UP ACROSS THE NRN/EASTERN GREAT LAKES. INCREASED POPS INTO THE CHC RANGE DURING THIS TIME AS THE BOUNDARY WILL BE TOO CLOSE FOR COMFORT AS SEVERAL WEAK SHORTWAVES TRACK ALONG IT IN SOUTHWESTERLY FLOW MENTIONED ABOVE. TUESDAY AND TUESDAY NIGHT STILL APPEAR TO BE THE PERIODS WITH THE BEST SHOT FOR SHOWERS/STORMS AS THE UPPER WAVE PROPAGATES INTO THE NRN GREAT LAKES...ELICITING A DECENT LOW LEVEL RESPONSE AS LARGE SCALE FORCING INCREASES INVOF THE FRONTAL BOUNDARY AS IT LIFTS NWD BACK INTO THE FA. WEDNESDAY THROUGH SATURDAY...INCREASING HEAT AND HUMIDITY IS ANTICIPATED BY THE END OF NEXT WEEK AS THE WAVE PATTERN AMPLIFIES ACROSS NOAM...WITH A WESTERN CONUS TROUGH AND EASTERN CONUS RIDGE. THE BULK OF MEDIUM RANGE GUIDANCE IS HINTING AT SOME ENERGY EJECTING INTO THE UPPER MIDWEST AND WESTERN GREAT LAKES BY LATE FRIDAY/SATURDAY. THIS WOULD FLATTEN THE RIDGE SOME AND POSSIBLY ALLOW A WEAKENING COLD FRONT TO REACH AS FAR SOUTH AS OUR CWA. MAY SEE AN MCS OR AT LEAST SOME SCT AFTN CONVECTION IF THIS PANS OUT. ADDED LOW CHC POPS TO FRI AFTN/FRI NIGHT/SAT TO ACCOUNT FOR THIS. && .AVIATION.../18Z TAFS/ MAINLY MVFR THRU THE PD. SCATTERED SHOWERS AND THUNDERSTORMS CURRENTLY DEVELOPING ACROSS THE FORECAST AREA AND EXPECT PRECIP TO AFFECT KSBN NEAR TAF ISSUANCE AND KFWA SHORTLY AFTER. BRIEF PDS OF IFR VISBYS EXPECTED AS EXTREMELY HEAVY RAINFALL IS POSSIBLE WITH ANY THUNDERSTORM. AS ALSO SEEN WITH PREVIOUS THUNDERSTORMS EARLIER TODAY ACROSS NORTHERN IL...WIND GUSTS WERE NEAR 30KTS. OTHERWISE WINDS WILL BE AT OR BELOW 10KTS...CALMING OVERNIGHT...AND INCREASING BY LATE SUN MRNG/AFTERNOON. OTHER MAIN CONCERN THIS PD IS FOG/HAZE DEVELOPMENT OVERNIGHT AND INTO THE MORNING HOURS ON SUNDAY. KEPT WITH PREVIOUS TAFS IN TERMS OF VISBYS...HOWEVER...WILL NEED TO MONITOR WITH FURTHER ISSUANCES FOR POSSIBLE DROPS INTO THE IFR RANGE. THEN FOR SUNDAY MORNING...FOG/HAZE WILL BEGIN TO LIFT SHORTLY AFTER SUNRISE AND WITH FRONTAL BOUNDARY STILL DRAPED ACROSS THE NORTHERN PORTION OF THE FCST AREA...ADDED MENTION OF CB TO LEAN TOWARDS SHOWER/TSTORM DEVELOPMENT AS AREA WILL STILL BE TAPPED INTO DEEPER MOISTURE. && .IWX WATCHES/WARNINGS/ADVISORIES... IN...NONE. MI...NONE. OH...NONE. LM...NONE. && SHORT TERM...JC LONG TERM...STEINWEDEL AVIATION...WEISSER
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NORTHERN INDIANA 848 AM EDT SAT JUN 12 2010 INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005- 015-016-024-025-131300- 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- INCLUDING THE CITIES OF...MICHIGAN CITY...LA PORTE...SOUTH BEND... MISHAWAKA...ELKHART...GOSHEN...LAGRANGE...TOPEKA...ANGOLA... KENDALLVILLE...LIGONIER...AUBURN...GARRETT...KNOX...NORTH JUDSON... WINAMAC...FRANCESVILLE...PLYMOUTH...BREMEN...ROCHESTER...WARSAW... WINONA LAKE...COLUMBIA CITY...SOUTH WHITLEY...FORT WAYNE... MONTICELLO...BROOKSTON...LOGANSPORT...PERU...WABASH... NORTH MANCHESTER...HUNTINGTON...BLUFFTON...OSSIAN...DECATUR... BERNE...MARION...HARTFORD CITY...MONTPELIER...PORTLAND...NILES... BENTON HARBOR...ST. JOSEPH...BUCHANAN...DOWAGIAC...CASSOPOLIS... STURGIS...THREE RIVERS...COLDWATER...HILLSDALE...BRYAN...WAUSEON... ARCHBOLD...DEFIANCE...NAPOLEON...PAULDING...ANTWERP...OTTAWA... PANDORA...VAN WERT...DELPHOS...LIMA 848 AM EDT SAT JUN 12 2010 /748 AM CDT SAT JUN 12 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST OHIO... SOUTHWEST LOWER MICHIGAN AND NORTHERN INDIANA. .DAY ONE...TODAY AND TONIGHT THERE IS A CHANCE FOR THUNDERSTORMS TODAY AND TONIGHT. HEAVY RAINFALL IS THE PRIMARY THREAT...HOWEVER SOME STORMS COULD BECOME SEVERE WITH DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A CHANCE FOR THUNDERSTORMS SUNDAY THROUGH TUESDAY. SEVERE STORMS ARE NOT ANTICIPATED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX LMZ043-046-131300- NEW BUFFALO MI TO ST JOSEPH MI-MICHIGAN CITY IN TO NEW BUFFALO MI- 848 AM EDT SAT JUN 12 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF SOUTHEASTERN LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE TODAY AND TONIGHT. SOME THUNDERSTORMS MAY PRODUCE WIND GUSTS OVER 35 KNOTS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A CHANCE OF THUNDERSTORMS SUNDAY THROUGH TUESDAY. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX JC
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
831 PM EDT SAT JUN 12 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0822 PM TSTM WND DMG FORT WAYNE 41.08N 85.13W
06/12/2010 ALLEN IN LAW ENFORCEMENT
TREES DOWN ACROSS ROAD. TRANSFORMERS BLOWN AND POWER
OUTAGES REPORTED. TIME ESTIMATED FROM RADAR.
&&
EVENT NUMBER IWX1000700
SAWSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
832 PM EDT SAT JUN 12 2010
INZ026-027-032>034-130115-
ADAMS IN-BLACKFORD IN-GRANT IN-JAY IN-WELLS IN-
832 PM EDT SAT JUN 12 2010
AT 827 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR UPLAND...MOVING EAST AT 35 MPH.
PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...AND HEAVY DOWNPOURS ARE
POSSIBLE WITH THIS STORM.
LOCATIONS IN THE PATH OF THIS STORM INCLUDE...
DUNKIRK...
PORTLAND...
MONTPELIER...
REDKEY...
PENNVILLE...
MILL GROVE...
GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND.
SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
SATURDAY EVENING FOR NORTHEASTERN INDIANA.
LAT...LON 4032 8522 4039 8522 4039 8552 4059 8553
4062 8479 4032 8480 4032 8481 4031 8496
4031 8521
TIME...MOT...LOC 0032Z 264DEG 29KT 4043 8541
MCSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
834 PM EDT SAT JUN 12 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0805 PM TSTM WND DMG ROANOKE 40.96N 85.37W
06/12/2010 HUNTINGTON IN TRAINED SPOTTER
8 INCH DIAMETER TREE DOWN AT 900N AND US24 IN TOWN.
TIME ESTIMATED FROM RADAR.
&&
EVENT NUMBER IWX1000701
SAWPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
849 PM EDT SAT JUN 12 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0848 PM FLOOD CORUNNA 41.44N 85.15W
06/12/2010 DEKALB IN AMATEUR RADIO
STANDING WATER OVER US6 IN MULTIPLE PLACES UP TO TIRE
RIMS.
&&
EVENT NUMBER IWX1000702
SAWSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
850 PM EDT SAT JUN 12 2010
OHZ016-024-025-130130-
ALLEN OH-PUTNAM OH-VAN WERT OH-
850 PM EDT SAT JUN 12 2010
AT 845 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR SPENCERVILLE...OR 7 MILES SOUTHWEST OF
DELPHOS...MOVING EAST AT 25 MPH.
PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...AND HEAVY DOWNPOURS ARE
POSSIBLE WITH THIS STORM.
LOCATIONS IN THE PATH OF THIS STORM INCLUDE...
DELPHOS...
FORT SHAWNEE...
LIMA...
ELIDA...
COLUMBUS GROVE...
NEEDMORE AND OTTOVILLE...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT SUNDAY
MORNING FOR NORTHWESTERN OHIO.
LAT...LON 4066 8422 4068 8422 4068 8441 4098 8443
4096 8387 4066 8387
TIME...MOT...LOC 0049Z 266DEG 22KT 4076 8437
MCSSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
902 PM EDT SAT JUN 12 2010
INZ027-OHZ024-130130-
ADAMS IN-VAN WERT OH-
902 PM EDT SAT JUN 12 2010
AT 859 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 10 MILES WEST OF OHIO CITY...OR 7 MILES SOUTHEAST
OF DECATUR...MOVING EAST AT 25 MPH.
WINDS GREATER THAN 40 MPH AND HEAVY DOWNPOURS ARE POSSIBLE WITH THIS
STORM.
LOCATIONS IN THE PATH OF THIS STORM INCLUDE...
VAN WERT...
CONVOY...
OHIO CITY...
ABANAKA...SCHUMM AND MIDDLEBURY...
GLENMORE AND DULL...
CAVETT...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT SUNDAY
MORNING FOR NORTHWESTERN OHIO.
LAT...LON 4093 8488 4094 8480 4095 8480 4098 8441
4068 8439 4068 8444 4072 8445 4072 8479
4063 8480 4062 8486
TIME...MOT...LOC 0102Z 266DEG 22KT 4077 8479
MCSThe Northern Indiana radar (KIWX), 139 km away, was scanning. The volume nearest the first event began at 01:22 UTC.
1 thunderstorm wind. Local standard time, as filed.
The public reported a barn was blown off its foundation, with numerous trees being downed. Roof damage also occurred to some nearby buildings. Damage is estimated at $25,000.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2010Every state in 2010This day in weather historyWarnings in Ohio, June 2010
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: 245565.