During the morning and afternoon hours of June 27th, a series of thunderstorms moved from central Illinois into Indiana. These storms had small hail and isolated pockets of gusty winds.
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.
During the morning and afternoon hours of June 27th, a series of thunderstorms moved from central Illinois into Indiana. These storms had small hail and isolated pockets of gusty winds. In addition to the winds and hail, some isolated flooding occurred as a result of storms training over the same locations.
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 27, 6:09 AM EST, 21 minutes earlier.
Area Forecast Discussion National Weather Service Indianapolis IN 709 AM EDT Sat Jun 27 2020 .UPDATE... The AVIATION Section has been updated below. && .SYNOPSIS... Issued at 419 AM EDT Sat Jun 27 2020 Warm, moist air will persist over the area for the forecast period allowing for chances of thunderstorms nearly everyday. && .NEAR TERM /Today/... Issued at 419 AM EDT Sat Jun 27 2020 A surface warm front has started sagging south into the forecast area early this morning and will continue to do so through the day. The low level jet that was promoting strong storms late last night has moved further east, allowing storms to weaken in our area. Latest CAMs show coverage becoming more isolated this morning but increasing again this afternoon with daytime heating. At any point today, rainfall within storms could be heavy, leading to isolated flooding as models show PWATs at the high end of normal for this time of year. Prolonged flooding is not expected, with the exception of areas that may experience training storms, due to grounds still being dry across the state. Increased instability and lapse rates this afternoon could lead to some storms producing damaging winds or even hail. Highs today will be near normal, in the mid 80s. && .SHORT TERM /Tonight through Monday Night/... Issued at 419 AM EDT Sat Jun 27 2020 Central Indiana will be on the peripheral back edge of a ridge, meaning that the air mass over the area will be warm and moist. A frontal boundary looks to stay over the area for the first part of the short term before pushing back north later in the period. The persistent warm, somewhat unstable air will allow for at least chance PoPs of thunderstorms for the entirety of the period. Did cap the PoPs to likely given that the surface boundary is not very strong. Highs will be from the mid 80s to lower 90s with lows near 70. && .LONG TERM /Tuesday Through Friday Night/... Issued at 249 AM EDT Sat Jun 27 2020 Warm and humid Weather with nearly daily chances for showers or thunderstorms looks to continue through much of the next week. ECMWF continues to keep a very warm and humid air mass in place through much of the next week. High pressure continues to be suggested to be in place aloft through the week. Meanwhile at the surface Low pressure is expected to be in place over the plains...extending a frontal Boundary across Indiana. This lower level feature along with the warm and humid air mass will be keys for Thunderstorm development through Thursday. Thus...daily chances for storms will be in the forecast through then. Chances for storms on Thursday night through Friday night are less as high pressure over the Great lakes begins a easterly flow of air to Central Indiana and the frontal boundary is depicted to sag southward...exiting the area. This will remove one of our forcing features...but a warm and humid air mass will remain across the area. Thus some small chances will persist...but confidence in that is low. Look for temps to remain at or above seasonal normals. && .AVIATION /Discussion for the 271200Z Tafs/... Issued at 709 AM EDT Sat Jun 27 2020 VFR conditions are mainly expected for this taf period...however periods of MVFR and IFR will be possible when and TSRA strikes a Taf site. A surface frontal boundary across Central Indiana in combination with several upper level weather disturbances expected to push across Central Indiana Today and tonight will generate showers and thunderstorms through the course of the day. Aiding TSRA development will be the warm and humid air mass in place across Indiana and models showing favorable forecast soundings for convection. HRRR shows several waves of showers and storms passing across the area this morning through this evening. Thus have tried to cover most of this period with VCTS/VCSH mention as confidence for precise timing is too low. && .IND WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...KH NEAR TERM...KH SHORT TERM...KH LONG TERM....Puma AVIATION...JP
Hazardous Weather Outlook National Weather Service Indianapolis IN 546 AM EDT Sat Jun 27 2020 INZ021-028>031-035>049-051>057-060>065-067>072-281000- 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-Sullivan-Greene-Monroe-Brown-Bartholomew-Decatur-Knox-Daviess- Martin-Lawrence-Jackson-Jennings- Including the cities of Delphi, Flora, Williamsport, West Lebanon, Lafayette, West Lafayette, Frankfort, Kokomo, Attica, Covington, Veedersburg, Crawfordsville, Lebanon, Zionsville, Tipton, Fishers, Carmel, Noblesville, Anderson, Muncie, Winchester, Clinton, Newport, Rockville, Greencastle, Plainfield, Brownsburg, Danville, Indianapolis, Greenfield, Cumberland, New Castle, Terre Haute, Brazil, Clay City, Spencer, Martinsville, Mooresville, Greenwood, Franklin, Shelbyville, Rushville, Sullivan, Linton, Bloomfield, Bloomington, Nashville, Columbus, Greensburg, Vincennes, Washington, Loogootee, Shoals, Bedford, Mitchell, Seymour, Brownstown, and North Vernon 546 AM EDT Sat Jun 27 2020 This hazardous weather outlook is for central Indiana. .DAY ONE...Today and Tonight. Outlook: There is a MARGINAL RISK for severe thunderstorms Today and Tonight. Hazards: Lightning, brief heavy rainfall, hail and damaging winds. Timing: Through the day and into the evening hours. Discussion: A frontal boundary will linger across Central Indiana today and tonight. Thunderstorms will develop along this boundary and push across the state today and tonight. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Outlook: There are chances for thunderstorms through most of the forecast period. Discussion: Several upper waves combining with a warm humid airmass will keep chances for showers and thunderstorms in the forecast through much of the upcoming seven day period. It is too soon to determine if these storms will be severe. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed Saturday afternoon and evening. .STORM MOTION STATEMENT... The expected storm motion is from the west at 25 to 35 MPH. && More information, along with other weather, hydrological and climate information can be found at http://weather.gov/ind Puma
The Indianapolis radar (KIND), 81 km away, was scanning. The volume nearest the first event began at 11:26 UTC.
1 thunderstorm wind. Local standard time, as filed.
A 2 inch tree limb snapped and fell over the road. No other thunderstorm wind damage was noted across the county.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2020Every state in 2020This day in weather historyWarnings in Indiana, June 2020
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: 890037.