A stationary boundary lingered over southern portions of central Indiana from late on the 11th to late on the 12th of June. This was the focus for a series of shower and thunderstorm complexes that produced copious amounts of rain over portions of Knox County, leading to flash flooding.
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 IND wrote it up.
A stationary boundary lingered over southern portions of central Indiana from late on the 11th to late on the 12th of June. This was the focus for a series of shower and thunderstorm complexes that produced copious amounts of rain over portions of Knox County, leading to flash flooding. Heavy rainfall also produced flash flooding across a portion of Jennings County as well.
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 Indianapolis, IN wrote its last area forecast discussion before the first event at Jun 11, 9:17 PM EST, 1 hour 13 minutes earlier.
Area Forecast Discussion National Weather Service Indianapolis IN 1017 PM EDT Mon Jun 11 2018 .UPDATE... The AVIATION section has been updated below. && .SYNOPSIS... Issued at 237 PM EDT Mon Jun 11 2018 A meandering frontal system will eventually pass off to the east towards the middle of the week. In the wake of the front, high pressure will move into the area for the later parts of the week and on into the weekend. && .NEAR TERM /Rest of Tonight/... Issued at 942 PM EDT Mon Jun 11 2018 Thunderstorms are coalescing into a complex across southern Illinois this evening. This complex will move east southeast and will at least clip the far southwestern forecast area. While some of the storms were severe earlier in southern Illinois, they seemed to have calmed some now as they move into less favorable air. Thus focus is shifting to a heavy rain threat. Precipitable water values across the far southwest are approaching 2 inches once again. The storms have plenty of moisture to work with, and the ground across the southwest is wet from storms Sunday and earlier today. Hi res short term models show more thunderstorms moving into the southwest late tonight. Given all of the above have went with a Flash Flood Watch across the far southwest 3 counties. Only went until 12Z for now, but this may have to be extended based on how thunderstorms actually develop overnight. Elsewhere across the area scattered convection continues to develop, especially south of I-70. Continued with chance PoPs there, with slight chance PoPs north. Did keep the increase in PoPs north overnight with additional convection possible. Tweaked min temperatures a bit, but no significant changes. Previous discussion follows... Diffuse frontal boundary looks to be located from southeast Indiana back into west central Indiana and central Illinois. Successive convective outflows over the past couple of days has pushed the better instability well southwest of the area. At this time, din't really see much of a trigger for convection for the rest of the afternoon and early evening hours, so will only keep some small chance PoPs going at those times. Short term model data suggest some convective development is possible after about 120300Z-120400Z as some enhanced flow in the 925-850mb layer noses into the area. However, mid level lapse rates look rather poor tonight. Based on this, will nudge up the PoPs a bit for later tonight, but keep them in the chance category. No real issues with the GFS MOS lows tonight, based off of low level thicknesses. && .SHORT TERM /Tuesday through Thursday/... Issued at 237 PM EDT Mon Jun 11 2018 Model data suggest upper ridge will retrograde some back into the Plains during this period, as a short wave trough moves through the Great Lakes around Wednesday, and into New England be Thursday. Cold front associated with the Great Lakes trough is expected to move across the local area Tuesday night into Wednesday morning, exiting the southeast zones around midday Wednesday. Will keep PoPs in the forecast for Tuesday and Tuesday night, and over the southeast zones Wednesday morning to cover the frontal passage. Operational and ensembles in agreement on generally dry weather by Wednesday night and Thursday, as weak surface high pressure moves in, resulting in more stable air mass. Progged low level thicknesses suggest the GFS MOS temperature guidance for the next couple of days look reasonable at this time, except for Wednesday night, where the lows look a little cool. Will bump the guidance lows up about a category in that period. && .LONG TERM /Thursday Night through Monday/... Issued at 154 PM EDT Mon Jun 11 2018 ECMWF continues to show strong ridging building across the Great Lakes and Ohio Valley through this period. Any upper forcing support should remain well north of central Indiana. This will result in only daytime heating and lower levels boundaries to drive precip chances. Forecast builder suggests slight or low chance pops at many times through the period...however confidence in this is low without any upper support and ridging in place. Overall, given the set-up, confidence is very low for specific shower or thunderstorm chances during this time. By Sunday and Monday...very warm and humid gulf air will be arriving. Here we trended daily highs at or slightly above the forecast builder blend. && .AVIATION (Discussion for the 120300Z TAF Update)... Issued at 1017 PM EDT Mon Jun 11 2018 Showers will continue to move across KIND for the next hour or two, so added a TEMPO for this. Can't rule out brief MVFR or even IFR conditions, but feel that most of the time it will just get down to low VFR. Removed thunder mention overnight as it looks like best instability remains to the south of the area. Previous discussion follows... A period of MVFR ceilings is expected at KLAF overnight, otherwise VFR conditions are expected (outside of convection). Most MVFR ceilings have moved out of the area, so expect VFR ceilings to rule this evening. Overnight a period of MVFR ceilings looks likely at KLAF. Some scattered convection across central Illinois at the moment will move southeast and could potentially impact all sites but KLAF early this evening. Handled these with VCTS or VCSH. Confidence for coverage and timing of convection overnight into Tuesday remains low. Put in a period of VCTS overnight for potential nocturnal development, then PROB30s on Tuesday for additional development. Will try to amend and provide better timing if trends become clearer. && .IND WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch until 8 AM EDT Tuesday for INZ060-067-068. && SYNOPSIS...JAS NEAR TERM...JAS/50 SHORT TERM...JAS LONG TERM....Puma AVIATION...50
Hazardous Weather Outlook National Weather Service Indianapolis IN 951 PM EDT Mon Jun 11 2018 INZ021-028>031-035>049-051>057-061>065-069>072-130200- Carroll-Warren-Tippecanoe-Clinton-Howard-Fountain-Montgomery-Boone- Tipton-Hamilton-Madison-Delaware-Randolph-Vermillion-Parke-Putnam- Hendricks-Marion-Hancock-Henry-Vigo-Clay-Owen-Morgan-Johnson-Shelby- Rush-Greene-Monroe-Brown-Bartholomew-Decatur-Martin-Lawrence-Jackson- Jennings- Including the cities of Lafayette, Frankfort, Kokomo, Crawfordsville, Anderson, Muncie, Indianapolis, Terre Haute, Shelbyville, Bloomington, Columbus, Bedford, and Seymour 951 PM EDT Mon Jun 11 2018 This hazardous weather outlook is for central Indiana. .DAY ONE...Tonight. Outlook: Thunderstorm activity is possible through tonight. Severe storms are not expected at this time, however some storms may contain gusty winds and heavy rainfall, which may lead to localized flooding. Hazards: Cloud to ground lightning, gusty winds, and heavy rainfall which may result in reduced visibility and localized flooding. Timing: Thunderstorm activity possible at any time through tonight. Discussion: A front in the area will keep a threat for thunderstorm activity through tonight. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Outlook: Thunderstorm activity is possible Tuesday into early Wednesday, and around Thursday night into Friday. Isolated severe storms are possible on Tuesday, especially south of a Terre Haute to Greensburg line. Heat index values may exceed 95 degrees Sunday afternoon. Discussion: A front lingering over Indiana will cause the potential for thunderstorm activity through Wednesday. Additional thunderstorm activity is possible from Thursday night into Friday. Hot temperatures may spread into the area by the second half of the weekend. .SPOTTER INFORMATION STATEMENT... Severe storm spotter activation is not anticipated through tonight. Severe storm spotters are encouraged to monitor future weather statements regarding the severe threat on Tuesday. && More information, along with other weather, hydrological and climate information can be found at http://weather.gov/ind INZ060-067-068-130200- Sullivan-Knox-Daviess- Including the city of Vincennes 951 PM EDT Mon Jun 11 2018 This hazardous weather outlook is for central Indiana. .DAY ONE...Tonight. Outlook: Thunderstorm activity is possible through tonight. An isolated severe storm is possible, but the main threat will be heavy rain and localized flooding. Hazards: Heavy rain, flooding, large hail, damaging winds. Timing: Anytime through the night. Discussion: A front in the area will keep a threat for thunderstorm activity through tonight. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Outlook: Thunderstorm activity is possible Tuesday into early Wednesday, and around Thursday night into Friday. Isolated severe storms are possible on Tuesday, especially south of a Terre Haute to Greensburg line. Heat index values may exceed 95 degrees Sunday afternoon. Discussion: A front lingering over Indiana will cause the potential for thunderstorm activity through Wednesday. Additional thunderstorm activity is possible from Thursday night into Friday. Hot temperatures may spread into the area by the second half of the weekend. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report any flooding issues tonight, along with any hail or damaging winds. Severe storm spotters are also encouraged to monitor future weather statements regarding the severe threat on Tuesday. && More information, along with other weather, hydrological and climate information can be found at http://weather.gov/ind
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1029 PM EDT MON JUN 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1025 PM HEAVY RAIN 3 E VINCENNES 38.68N 87.46W
06/11/2018 M2.08 INCH KNOX IN CO-OP OBSERVER
AMOUNT SINCE 7 AM EDT.
&&
BHHSpecial Weather Statement
National Weather Service Indianapolis IN
1058 PM EDT MON JUN 11 2018
INZ061-120330-
Greene IN-
1058 PM EDT MON JUN 11 2018
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL GREENE COUNTY UNTIL 1130
PM EDT...
At 1058 PM EDT, Doppler radar was tracking a strong thunderstorm near
Bloomfield, or 30 miles west of Bedford, moving northeast at 20 mph.
Dime size hail will be possible with this storm.
Locations impacted include...
Bloomfield, Lyons, Switz City, Newberry and Solsberry.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3917 8686 3917 8681 3899 8668 3890 8702
3890 8707 3901 8717
TIME...MOT...LOC 0258Z 244DEG 19KT 3897 8704
50The Evansville,IN radar (KVWX), 41 km away, was scanning. The volume nearest the first event began at 03:30 UTC.
5 flash flood. Local standard time, as filed.
Water was over some roads approximately seven miles south of Vincennes due to heavy thunderstorm rainfall.
Coyote Road between Beal Road and 6th Street Road was closed with water flowing over it due to heavy thunderstorm rainfall.
Greentree Road was closed with water flowing over the road due to heavy thunderstorm rainfall.
Blood Woods Road was closed with water flowing over the road due to heavy thunderstorm rainfall.
A car drove through a flooded road and stalled near the intersection of County Roads 150 East and 450 North due to thunderstorm heavy rainfall.
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: 766282, 766287, 766297, 766309, 766311.