A cold front moved through northwestern Ohio during the afternoon hours. Surface temperatures in the upper 80s to around 90 and dewpoints in the 60s allowed for most unstable CAPE values approaching 1000 j/kg.
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.
A cold front moved through northwestern Ohio during the afternoon hours. Surface temperatures in the upper 80s to around 90 and dewpoints in the 60s allowed for most unstable CAPE values approaching 1000 j/kg. Shear was less than 30 knots, limiting overall growth potential of the storms, but still allowing for isolated storms to produce damaging winds across portions of Defiance county.
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 21, 12:45 PM EST, 4 hours 39 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTHERN INDIANA 145 PM EDT THU JUN 21 2012 .UPDATE/AVIATION... POTENT NRN STREAM SW CONTS EWD ACRS SW ON THIS AFTN. TRAILING CDFNT EXTENDS SWD FM SFC CYCLONE OVR SRN JAMES BAY BISECTING CNTRL LWR MI THEN TRAILS WWD INTO ERN IL/WRN IN BORDER AREA. DOWNSTREAM WARMING/MIXING HAS BEEN QUICK THROUGH THIS MORNING W/SFC BASED CAPE SUGGESTIVE OF IMMINENT CONV INITIATION ALG SFC BNDRY AND SECONDARY CONVN ALG 850MB FRONT FARTHER BACK ACRS IL AND OBSVD RECENTLY IN THE GREATER CHICAGO METRO AREA. THUS BELIEVE GIST OF AFTN GRIDDED POPS ON THE MARK W/CONCURRENT NOD OF LATEST RUN OF 4KM SPC WRF. HWVR SHEAR IS LACKING AND DOUBT MUCH OF A SVR WIND THREAT EXISTS EVEN IN DEEP/WELL MIXED AND HOT BNDRY LYR GIVEN LACK OF CAPE AND MID LVL FLW MAX OF ONLY 30KTS. VFR CONDS XPCD THROUGH THE TAF PD. HWVR GUSTY WINDS AT KFWA THIS AFTN AND ISOLD-SCT COVERAGE OF CONVN THROUGH MID AFTN. && .SHORT TERM... TODAY THROUGH FRIDAY NIGHT...A COLD FRONT EXTENDING FROM WI INTO E IA WILL MOVE SOUTHEAST ACROSS THE FORECAST AREA TODAY. OVERNIGHT CONVECTIVE OUTFLOWS UPSTREAM HAVE MADE THE FRONT DIFFUSE WITHOUT ANY SHARP OR WELL DEFINED BOUNDARY. VERY CHALLENGING FOR TIMING AND COVERAGE OF CONVECTION TODAY GIVEN VERTICAL WIND PROFILES WITH RELATIVELY WARM MID LEVEL TEMPS. FOR THIS PACKAGE...FAVOR THE 4KM NAM/WRF. THE NAM/WRF APPEARS TO HAVE THE BEST HANDLE WITH THE ONGOING CONVECTION AND BOUNDARIES AND PROVIDES A REASONABLE SOLUTION THIS AFTERNOON. EXPECT A GENERAL DEVELOPMENT OF STORMS OVER NRN INDIANA INTO LOWER MICHIGAN BY EARLY AFTERNOON. ADDED GUSTY WINDS TO STORMS THIS AFTERNOON GIVEN HOT TEMPERATURES WITH SIGNIFICANT DOWNWARD CAPE. KEPT A LINGERING CHANCE FOR A STORM THIS EVENING OVER FAR SOUTHEAST AREAS INCLUDING LIMA/AOH. KEPT THE REST OF THE SHORT TERM FCST DRY CITY WITH COOLER TEMPERATURES. && .LONG TERM... SATURDAY THROUGH WEDNESDAY... NW FLOW PATTERN EXPECTED THROUGH THE EXTENDED PERIOD BRINGING COOLER AND LESS HUMID CONDITIONS TO THE AREA. HIGHS THROUGH THE PERIOD EXPECTED TO BE AOB NORMAL...WITH 5-10F BELOW NORMAL FOR MON AND TUE. DISTURBANCE MOVING DOWN THROUGH NW FLOW TO IMPACT THE AREA THIS WEEKEND ALONG WITH A WEAK SFC REFLECTION IN THE FORM OF A FRONTAL WAVE MOVING ALONG DIFFUSE BOUNDARY. LARGE VARIABILITY AMONG THE MODELS WRT TIMING SO WILL STAY CLOSE TO GOING FCST AND KEEP SLIGHT CHANCE IN FOR SUN/SUN NITE. OTHERWISE DROUGHT CONDITIONS TO PERSIST WITH DRY FCST REMAINDER OF THE PERIOD. && .IWX WATCHES/WARNINGS/ADVISORIES... IN...NONE. MI...NONE. OH...NONE. LM...NONE. && SHORT TERM...SKIPPER LONG TERM...LOGSDON AVIATION...T
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NORTHERN INDIANA 847 AM EDT THU JUN 21 2012 INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005- 015-016-024-025-221000- 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 847 AM EDT THU JUN 21 2012 /747 AM CDT THU JUN 21 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST OHIO... SOUTHWEST LOWER MICHIGAN AND NORTHERN INDIANA. .DAY ONE...TODAY AND TONIGHT ISOLATE TO SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON. NO SEVERE STORMS ARE EXPECTED HOWEVER AN ISOLATED STORM MAY PRODUCE STRONG GUSTY WINDS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A SLIGHT CHANCE FOR THUNDERSTORMS SUNDAY AND SUNDAY NIGHT. HOWEVER...NO RELIEF FROM THE INTENSIFYING DROUGHT IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX LMZ043-046-221000- NEW BUFFALO MI TO ST JOSEPH MI-MICHIGAN CITY IN TO NEW BUFFALO MI- 847 AM EDT THU JUN 21 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF SOUTHEASTERN LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT AN ISOLATED THUNDERSTORM IS POSSIBLE THROUGH EARLY AFTERNOON. NO SEVERE WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A SLIGHT CHANCE FOR THUNDERSTORMS SUNDAY AND SUNDAY NIGHT. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
338 PM EDT THU JUN 21 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0308 PM TSTM WND DMG 2 S BRONSON 41.84N 85.19W
06/21/2012 BRANCH MI PUBLIC
PUBLIC REPORT TREE DOWN ON VEHICLE. WIND GUST ESTIMATED
TO 56 MPH.
0308 PM HAIL 2 S BRONSON 41.84N 85.19W
06/21/2012 E1.00 INCH BRANCH MI PUBLIC
PUBLIC REPORT TREE DOWN ON VEHICLE. WIND GUST ESTIMATED
TO 56 MPH.
0310 PM TSTM WND DMG 1 ENE BATAVIA 41.92N 85.08W
06/21/2012 BRANCH MI EMERGENCY MNGR
REPORT OF TREES AND WIRES DOWN ON WHEELER ROAD
&&
LEWISPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
349 PM EDT THU JUN 21 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0340 PM TSTM WND DMG 2 SSE ALLEN 41.93N 84.75W
06/21/2012 HILLSDALE MI EMERGENCY MNGR
REPORT OF TREES DOWN ACROSS THE COUNTY. TREE FELL ON A
CAR NEAR STATE ROUTE 49 AND WEST BACON ROAD.
&&
NGSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTHERN INDIANA 404 PM EDT THU JUN 21 2012 INZ009-OHZ001-004-212030- DE KALB IN-DEFIANCE OH-WILLIAMS OH- 404 PM EDT THU JUN 21 2012 ...STRONG THUNDERSTORMS MOVING ACROSS SOUTHERN WILLIAMS... NORTHWESTERN DEFIANCE AND EASTERN DE KALB COUNTIES... AT 359 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR BUTLER...MOVING EAST AT 30 MPH. PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING AND BRIEF HEAVY DOWNPOURS ARE POSSIBLE WITH THIS STORM. LOCATIONS IN THE PATH OF THIS STORM INCLUDE... BRYAN... EDGERTON... ARTIC... BLAKESLEE... WILLIAMS CENTER...MELBERN AND FARMER... GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. LAT...LON 4162 8452 4137 8441 4130 8489 4142 8497 TIME...MOT...LOC 2003Z 251DEG 24KT 4138 8486 NG
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
408 PM EDT THU JUN 21 2012
OHZ001-002-212045-
FULTON OH-WILLIAMS OH-
408 PM EDT THU JUN 21 2012
...STRONG THUNDERSTORMS MOVING ACROSS FULTON AND SOUTHEASTERN
WILLIAMS COUNTIES...
AT 403 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR STRYKER...OR NEAR ARCHBOLD...MOVING EAST AT
40 MPH.
PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...OCCASIONAL CLOUD TO
GROUND LIGHTNING AND BRIEF HEAVY DOWNPOURS ARE POSSIBLE WITH THIS
STORM.
LOCATIONS IN THE PATH OF THIS STORM INCLUDE...
WAUSEON...
SWANTON...
DELTA...
PETTISVILLE...
TEDROW...
OTTOKEE AND OAKSHADE...
GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES.
SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.
LAT...LON 4156 8388 4149 8419 4149 8434 4146 8435
4143 8442 4158 8449 4171 8410 4171 8388
TIME...MOT...LOC 2008Z 249DEG 36KT 4153 8432
NGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
440 PM EDT THU JUN 21 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0329 PM TSTM WND DMG QUINCY 41.94N 84.88W
06/21/2012 BRANCH MI PUBLIC
PUBLIC REPORT OF TREES DOWN IN QUINCY. TIME ESTIMATED
FROM RADAR.
0338 PM TSTM WND DMG ALLEN 41.96N 84.77W
06/21/2012 HILLSDALE MI EMERGENCY MNGR
REPORTS OF TREES AND POWERLINES DOWN IN ALLEN ALONG
U.S. 12. TIME ESTIMATED FROM RADAR.
&&
NGSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
526 PM EDT THU JUN 21 2012
INZ009-018-OHZ004-015-212200-
ALLEN IN-DE KALB IN-DEFIANCE OH-PAULDING OH-
526 PM EDT THU JUN 21 2012
...STRONG THUNDERSTORMS MOVING ACROSS WESTERN DEFIANCE...NORTHERN
PAULDING...NORTHERN ALLEN AND SOUTHEASTERN DE KALB COUNTIES...
AT 524 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR GRABILL...OR 8 MILES NORTHEAST OF NEW
HAVEN...MOVING NORTHEAST AT 30 MPH.
PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING AND BRIEF HEAVY DOWNPOURS ARE POSSIBLE WITH THIS STORM.
LOCATIONS IN THE PATH OF THIS STORM INCLUDE...
HICKSVILLE...
ANTWERP...
PAULDING...
GEORGETOWN AND SPENCERVILLE...
CECIL...
MARK CENTER AND SHERWOOD...
GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES.
SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.
LAT...LON 4115 8442 4107 8505 4113 8524 4128 8498
4133 8487 4137 8479 4142 8468
TIME...MOT...LOC 2126Z 236DEG 25KT 4118 8493
NGThe Northern Indiana radar (KIWX), 114 km away, was scanning. The volume nearest the first event began at 22:24 UTC.
1 thunderstorm wind. Local standard time, as filed.
Emergency management officials reported three trees and a power pole down in the 6600 block of Domersville Road. A large, but rotten, tree limb broke off a tree at a residence southeast of this location. In addition, Poplar Ridge Church of the Brethren suffered some minor fascia damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2012Every state in 2012This day in weather historyWarnings in Ohio, June 2012
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: 386256.