Southward sagging stationary frontal zone augmented with outflow particularly from intense West to East cluster of intense storms that developed mid afternoon across southern WI eastward through southwestern Lower Michigan. High precipitable water values, very unstable conditions and DCAPE around 1000 J/KG were in place with a poorly sheared environment.
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.
Southward sagging stationary frontal zone augmented with outflow particularly from intense West to East cluster of intense storms that developed mid afternoon across southern WI eastward through southwestern Lower Michigan. High precipitable water values, very unstable conditions and DCAPE around 1000 J/KG were in place with a poorly sheared environment. Several small bowing segments developed in areas causing localized swaths of 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 Jun 18, 7:08 PM EST, 22 minutes earlier.
Area Forecast Discussion National Weather Service Northern Indiana 808 PM EDT Mon Jun 18 2018 .SYNOPSIS... Issued at 803 PM EDT Mon Jun 18 2018 Scattered showers with a few thunderstorms are expected tonight and continue into Tuesday with very heavy rainfall possible from the stronger storms. A weak cold front moving into the area tonight will provide some relief from the heat for the rest of the week. && .SHORT TERM...(This Evening through Tuesday) Issued at 236 PM EDT Mon Jun 18 2018 The fcst area remains under a heat advisory through this evening as temperatures have climbed through the 80s early this aftn. Expect temperatures to top out in the low to mid 90s with heat indices over 100 most places. Convection that was occurring to the north across MI this morning has dissipated with some redevelopment along and north of I90. HiRes models point to scattered convection across the northern half of the area then dissipating after 03-04Z. There should be a lull overnight and then another round of thunderstorms Tue aftn. CAPE values are well above 2000 this aftn and is expected for Tue. Precip water values have been 1.5 to 1.75 today are fcst to rise to around 2 inches by Tue. The frontal boundary oriented e-w just to our north today will sink southward overnight and be situ across U.S. 30 by Tue aftn where the precip focus should be for tmrw into tmrw night. A marginal risk for svr exists into tonight with isolated damaging wind being the primary threat. With the boundary shifting southward the threat area focuses on the southern third of the fcst area Tue for both rainfall and isolated damaging wind. Since the HiRes models do not keep thunderstorms ongoing through the night...do not think flooding will be an issue in the near term even if individual storms are efficient rainfall producers. However will mention in the weather story the potential for heavy rains Tue aftn. && .LONG TERM...(Tuesday Night through Monday) Issued at 236 PM EDT Mon Jun 18 2018 An upper low over the northern Rockies will translate into the central plains during the midweek period reaching Illinois by Friday. The low will meander as upper level ridging blocks eastward movement of the low. As the ridge flattens the low lifts newd into the Gtlks by the weekend. Ahead of this...our weather pattern will remain unsettled with chances for precipitation most days except Wed night/Thu. Temperatures are expected to be more seasonal with highs in the upper 70s to lower 80s through the week. && .AVIATION...(For the 00Z TAFS through 00Z Tuesday Evening) Issued at 700 PM EDT Mon Jun 18 2018 KIWX radar showing widely scattered showers over the area this evening with just a few lightning strikes. More organized line of convection to the north over lake Michigan has been trending weaker in the past hour but renewed convection along the northern Illinois border. CAM models have been hot and cold with how this convection will evolve tonight. Despite loss of daytime heating, sufficient forcing along approaching frontal boundary will warrant a prevailing group for SBN early tonight. Will then bring precip chances back at both sites Tuesday afternoon as airmass destabilizes and front stalls out over the area. Gusty southwest winds should diminish tonight as gradient weakens with arrival of front. Front expected to push through SBN after midnight and stall near FWA. Low level moisture pooling in the vicinity of front will have lowering ceilings with latest model guidance going down to IFR. Will follow previous issuance and only go down to MVFR for now and re-evaluate at 06Z cycle. && .IWX WATCHES/WARNINGS/ADVISORIES... IN...NONE. MI...NONE. OH...NONE. LM...NONE. && SYNOPSIS...JAL SHORT TERM...MF LONG TERM...MF AVIATION...JAL Visit us at www.weather.gov/iwx Follow us on Facebook...Twitter...and YouTube at: www.facebook.com/NWSNorthernIndiana www.twitter.com/nwsiwx www.youtube.com/NWSNorthernIndiana
Hazardous Weather Outlook National Weather Service Northern Indiana 533 AM EDT Mon Jun 18 2018 INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005- 015-016-024-025-190945- 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- 533 AM EDT Mon Jun 18 2018 /433 AM CDT Mon Jun 18 2018/ This hazardous weather outlook is for portions of southwest Michigan...northern Indiana and northwest Ohio. .DAY ONE...Today and Tonight A heat advisory is in effect today with temperatures rising from 90 to 95 this afternoon with heat indices around 100. Thunderstorm chances will be increasing tonight. Severe weather is not expected, but locally heavy rainfall is possible. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday There are chances for storms from Tuesday through the end of the week. The storms are not expected to become severe, but some will likely have locally heavy rainfall and possibly gusty winds. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. && Stay tuned to NOAA Weather Radio for further details or updates...or check our web site at weather.gov/iwx LMZ043-046-190945- New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI- 533 AM EDT Mon Jun 18 2018 This hazardous weather outlook is for portions of The Nearshore Waters of Southeastern Lake Michigan. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday No hazardous weather is expected at this time. && Stay tuned to NOAA Weather Radio for further details or updates...or check our web site at weather.gov/iwx
Special Weather Statement National Weather Service Northern Indiana 602 PM EDT MON JUN 18 2018 INZ008-009-182230- Noble-De Kalb- 602 PM EDT MON JUN 18 2018 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN NOBLE AND SOUTHWESTERN DE KALB COUNTIES... At 601 PM EDT, a strong thunderstorm was located near Avilla, or 9 miles southwest of Kendallville, moving east at 25 mph. Winds in excess of 30 mph and pea size hail are possible with this storm. Locations impacted include... Auburn, Kendallville, Garrett, Avilla, Albion, Swan, Corunna, Altona, Ege, Green Center, Butler Center, Lisbon, Saint Johns, Laotto and Sedan. This includes Interstate 69 in Indiana between mile markers 323 and 331. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4128 8543 4141 8540 4145 8507 4127 8503 TIME...MOT...LOC 2201Z 280DEG 21KT 4132 8533 JAL
Special Weather Statement
National Weather Service Northern Indiana
611 PM EDT MON JUN 18 2018
OHZ001-002-182245-
Fulton-Williams-
611 PM EDT MON JUN 18 2018
...A STRONG THUNDERSTORM WILL AFFECT WESTERN FULTON AND EASTERN
WILLIAMS COUNTIES...
At 610 PM EDT, a strong thunderstorm was located near West Unity, or
near Montpelier, moving east at 30 mph.
Winds in excess of 30 mph are possible with this storm.
Locations impacted include...
Bryan, Archbold, Montpelier, West Unity, Stryker, Fayette, Holiday
City, West Jefferson, Pulaski, Alvordton, Pettisville, Zone, Elmira,
Tedrow, Hallock and Kunkle.
This includes Interstate 80 in Ohio between mile markers 12 and 31.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4149 8421 4149 8433 4148 8434 4145 8434
4148 8460 4166 8459 4170 8420
TIME...MOT...LOC 2210Z 270DEG 27KT 4158 8450
JALSpecial Weather Statement
National Weather Service Northern Indiana
626 PM EDT MON JUN 18 2018
INZ013-020-022-182300-
Cass-White-Pulaski-
626 PM EDT MON JUN 18 2018
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN WHITE...
SOUTHEASTERN PULASKI AND NORTHWESTERN CASS COUNTIES...
At 626 PM EDT/526 PM CDT/, a strong thunderstorm was located 8 miles
northeast of Monticello, moving east at 30 mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm.
Locations impacted include...
Monticello, Royal Center, Burnettsville, Idaville, Sitka, Star City,
Thornhope, Headlee, Bell Center, Buffalo and Lake Cicott.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4102 8647 4091 8647 4091 8645 4074 8643
4074 8675 4090 8678
TIME...MOT...LOC 2226Z 249DEG 24KT 4085 8667
JALPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
711 PM EDT MON JUN 18 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0650 PM TSTM WND DMG WAUSEON 41.55N 84.14W
06/18/2018 FULTON OH TRAINED SPOTTER
LARGE TREE LIMB DOWN ACROSS ROADWAY.
&&
GHSpecial Weather Statement National Weather Service Northern Indiana 739 PM EDT MON JUN 18 2018 INZ015-022-190015- Cass-Fulton- 739 PM EDT MON JUN 18 2018 ...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL FULTON AND NORTHERN CASS COUNTIES... At 739 PM EDT, a strong thunderstorm was located over Royal Center, or 8 miles northwest of Logansport, moving east at 20 mph. Winds in excess of 40 mph and pea size hail are possible with this storm. Locations impacted include... Logansport, Royal Center, Fulton, Nyena Lake, New Waverly, Leases Corner, Twelve Mile, Metea, Hoover, Fletcher, Adamsboro, Lucerne and Anoka. Torrential rainfall is also occurring with this storm, and may cause 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 4077 8655 4089 8655 4097 8617 4070 8617 TIME...MOT...LOC 2339Z 271DEG 17KT 4085 8647 JAL
Special Weather Statement National Weather Service Northern Indiana 826 PM EDT MON JUN 18 2018 INZ006-190100- Lagrange- 826 PM EDT MON JUN 18 2018 ...A STRONG THUNDERSTORM WILL AFFECT LAGRANGE COUNTY... At 825 PM EDT, a strong thunderstorm was located near Lagrange, moving east at 30 mph. Winds in excess of 30 mph and pea size hail are possible with this storm. Locations impacted include... Lagrange, Scott, Shipshewana, Honeyville, Stroh, Brighton, Mongo, Indianola, Brushy Prairie, Woodruff, Elmira, Big Long Lake, Adams Lake, Oliver Lake, Howe, Plato, Ontario and Emma. This includes Interstate 80 in Indiana between mile markers 111 and 132. Torrential rainfall is also occurring with this storm, and may cause 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 4153 8519 4158 8565 4176 8561 4176 8520 TIME...MOT...LOC 0025Z 281DEG 26KT 4166 8553 JAL
The Northern Indiana radar (KIWX), 44 km away, was scanning. The volume nearest the first event began at 00:29 UTC.
5 thunderstorm wind. Local standard time, as filed.
Local law enforcement reported a tree was blown down onto power lines.
Local media reported a tree limb broke off and fell onto an unoccupied vehicle.
Trees were reported blown down in the area.
A survey of damage was performed from northeast of Dewart Lake to north of North Webster where extensive tree damage occurred from straight line winds. Several smaller trees were snapped with larger tree limbs blown down.
Emergency management officials reported several trees down across the city of Huntington. At least three cars and a motorcycle suffered damage from falling trees or tree limbs. No injuries were reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2018Every state in 2018This day in weather historyWarnings in Indiana, June 2018
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: 771858, 771860, 771861, 771856, 771851.