Convection developed over northeastern Illinois and moved across portions of northern Indiana into northwestern Ohio. Dense cloud cover much of the day prevented widespread severe weather.
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.
Convection developed over northeastern Illinois and moved across portions of northern Indiana into northwestern Ohio. Dense cloud cover much of the day prevented widespread severe weather. However, some of the convection was able to tap strong wind fields aloft and cause some damage.
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 Jul 18, 3:13 PM EST, 1 hour 29 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTHERN INDIANA 413 PM EDT SUN JUL 18 2010 .SHORT TERM... STORMS HAVE INTENSIFIED AFTER MOVING INTO NORTHERN INDIANA AND FAR SW LOWER MICHIGAN WHERE SFC BASED CAPES HAD RISEN TO AROUND OR ABOVE 3000 J/KG. BULK SHEAR MORE MARGINAL BUT SUFFICIENT FOR SOME SEVERE STORMS WITH MAINLY A DAMAGING WIND GUST THREAT. STORMS SHOULD MOVE ACROSS BY LATE EVENING...SO HAVE ADJUSTED TIMING AND COVERAGE OF STORMS ACCORDINGLY. THE FRONT SHOULD MOVE SOUTHEAST AND BECOME STATIONARY JUST SOUTH OF THE AREA MONDAY NIGHT WITH STORMS POSSIBLE AGAIN MONDAY EVENING. && .LONG TERM... ACTIVE WX ANTICIPATED ALG SFC FNTL ZONE BTWN SRN US SUBTROPICAL RIDGE AND PERTURBED SRN CANADA POLAR WESTERLIES THIS PD. HWVR DAILY DETAILS WRT PLACEMENT OF STATIONARY FNTL ZONE REMAIN UNCERTAIN...TIED TO FUTURE MESOSCALE MODULATIONS AND DICTATE THROUGH WHAT SHLD BE DAILY EPISODIC CONVN. AGAIN FEW CHGS WARRANTED AND KEEPING W/A CONSERVATIVE APCH TO POPS THROUGH THE PD AS LTR MESOSCALE DETAILS WILL IN TIME LEND GREATER CERTAINTY TO TIMING AND PLACEMENT OF HIGHER CONV PROBABILITIES. && .AVIATION/UPDATE... MCV/STORM COMPLEX ACROSS SOUTHERN IL AND EASTERN MO WAS HAVING A MAJOR IMPACT ON AVIATION AND FCST ISSUES FOR THE FORECAST AREA. HAVE UPDATED GRIDS/FCST TO GO WITH A LATER TIMING OF STORMS TODAY. SUBSIDENCE ON THE NORTH SIDE OF THE COMPLEX WAS LIMITING STORM DEVELOPMENT. THE COMPLEX SHOULD CONTINUE TO MOVE SOUTH THIS AFTERNOON AS THE ATMOSPHERE DESTABILIZES OVER N INDIANA AND SURROUNDING AREAS. OLDER 4KM WRF RUN HAS BEEN HANDLING THIS SCENARIO WELL...AND INDICATES STORMS SHOULD DEVELOP IN THE SFC THETA E RIDGE OVER N INDIANA BY 21Z. HAVE UPDATED THE TAFS AND FORECAST IN THIS REGARD. HAVE ALSO LOWERED HIGH TEMPERATURES TODAY...ESPECIALLY OVER WEST AREAS GIVEN HIGH CLOUD CANOPY && .IWX WATCHES/WARNINGS/ADVISORIES... IN...NONE. MI...NONE. OH...NONE. LM...NONE. && SHORT TERM...SKIPPER LONG TERM...T AVIATION...SKIPPER
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NORTHERN INDIANA 954 AM EDT SUN JUL 18 2010 INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005- 015-016-024-025-191400- 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 954 AM EDT SUN JUL 18 2010 /854 AM CDT SUN JUL 18 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST OHIO... SOUTHWEST LOWER MICHIGAN AND NORTHERN INDIANA. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP BY MID AFTERNOON AND PERSIST INTO THIS EVENING. SOME OF THE STORMS MAY BE SEVERE WITH DAMAGING WIND GUSTS THE PRIMARY THREAT. HAIL TO ONE INCH IN DIAMETER IS POSSIBLE WITH THE STRONGER STORMS. HEAVY DOWNPOURS WHICH MAY CAUSE LOCALIZED FLOODING ARE ALSO POSSIBLE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS ARE POSSIBLE MONDAY NIGHT THROUGH THURSDAY AS AN ACTIVE PATTERN SETTLES INTO THE GREAT LAKES REGION. THE THREAT FOR SEVERE WEATHER WILL BE ELEVATED IN THIS PERIOD...WITH DAMAGING WINDS BEING THE PRIMARY THREAT. HEAVY RAINFALL WILL ALSO BE A POSSIBILITY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY BE NEEDED TODAY && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX LMZ043-046-191400- NEW BUFFALO MI TO ST JOSEPH MI-MICHIGAN CITY IN TO NEW BUFFALO MI- 954 AM EDT SUN JUL 18 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF SOUTHEASTERN LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED TODAY. SOME OF THE STORMS MAY BE SEVERE WITH WIND GUSTS TO 50 KNOTS WITH LOCALLY HIGHER WAVES NEAR STORMS THE PRIMARY THREAT. HAIL TO ONE INCH IN DIAMETER IS ALSO POSSIBLE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS ARE POSSIBLE MONDAY NIGHT THROUGH THURSDAY AS AN ACTIVE PATTERN SETTLES INTO THE GREAT LAKES REGION. THE THREAT FOR SEVERE WEATHER WILL BE ELEVATED IN THIS PERIOD...WITH DAMAGING WINDS BEING THE PRIMARY THREAT. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX/?N=MARINE
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
422 PM EDT SUN JUL 18 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0410 PM TSTM WND DMG 2 N SILVER LAKE 41.10N 85.89W
07/18/2010 KOSCIUSKO IN STORM CHASER
3 TO 6 IN BRANCHES DOWN ACROSS COUNTY 15
&&
EVENT NUMBER IWX1000931
CEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
436 PM EDT SUN JUL 18 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0430 PM TSTM WND GST HUNTINGTON 40.88N 85.50W
07/18/2010 M60 MPH HUNTINGTON IN TRAINED SPOTTER
MEASURED 60 MPH GUST...TREES AND POWER LINES DOWN IN
THE CITY
&&
EVENT NUMBER IWX1000932
CEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
439 PM EDT SUN JUL 18 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0425 PM TSTM WND DMG 2 W SIDNEY 41.10N 85.78W
07/18/2010 KOSCIUSKO IN TRAINED SPOTTER
6 INCH DIAMETER TREE DOWN IN CEMETERY NEAR THE CORNER
OF 400 E AND 900 S. LARGE AMOUNT OF DEBRIS IN THE ROAD
AS WELL.
&&
EVENT NUMBER IWX1000933
LEWISPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
449 PM EDT SUN JUL 18 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0441 PM TSTM WND GST 8 S COLUMBIA CITY 41.04N 85.49W
07/18/2010 M56 MPH WHITLEY IN EMERGENCY MNGR
ALSO PEA SIZED HAIL
&&
EVENT NUMBER IWX1000934
CEOPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE NORTHERN INDIANA
500 PM EDT SUN JUL 18 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0324 PM TSTM WND GST SAINT JOSEPH 42.11N 86.48W
07/18/2010 M80 MPH BERRIEN MI TRAINED SPOTTER
*** 1 INJ *** MEASURED 80 MPH GUST...TENTS BLOWN OVER
AT VENETIAN FESTIVAL
&&
CORRECTED INJURIES
EVENT NUMBER IWX1000928
CEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
536 PM EDT SUN JUL 18 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0520 PM LIGHTNING FORT WAYNE 41.08N 85.13W
07/18/2010 ALLEN IN AMATEUR RADIO
HOUSE ON FIRE FROM LIGHTNING STRIKE
&&
EVENT NUMBER IWX1000935
CEOThe Northern Indiana radar (KIWX), 141 km away, was scanning. The volume nearest the first event began at 21:43 UTC.
2 thunderstorm wind. Local standard time, as filed.
Emergency management officials reported power lines down on County Road 2 between County Road H and State Road 281.
A trained spotter reported a small field of sweet corn being flattened by the winds. In addition, a maple tree fell onto a power line on County Road 8.
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, July 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: 253496, 253497.