Cold front sagging south into very unstable air mass with deep layer shear 25-30 kts. There was an SPC slight risk for severe weather with hail and wind being primary threats.
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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.
Cold front sagging south into very unstable air mass with deep layer shear 25-30 kts. There was an SPC slight risk for severe weather with hail and wind being primary threats. Most convection was suppressed during the day due to previous storms. An isolated severe storm developed around 1130 PM over Grant County, IN.
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 3, 7:04 PM EST, 3 hours 56 minutes earlier.
Area Forecast Discussion National Weather Service Northern Indiana 804 PM EDT Wed Jun 3 2020 .SYNOPSIS... Issued at 321 PM EDT Wed Jun 3 2020 A few showers and thunderstorms remain possible later tonight with muggy conditions in place. The next chance for showers and storms will be Friday afternoon before cooler and less humid conditions arrive for the weekend. && .UPDATE... Issued at 804 PM EDT Wed Jun 3 2020 Exceptionally stable/capped conditions in place across our CWA this evening per SPC/RAP mesoanalysis and made significant cuts to PoPs earlier to reflect dry evening forecast. Main question will be how much (if any) convection returns to our area later tonight with arrival of 850mb trough and perhaps a subtle MCV. Most hi-res guidance indicates at least SCT convection over our central/southern CWA in the 06-12Z window but CAM's have struggled to capture convective trends this evening and it is difficult to pinpoint any meaningful forcing or moisture advection to overcome initially stable conditions and poor diurnal timing. Did raise and expand PoPs for later tonight but kept them in the low chance category. Given poor midlevel lapse rates and limited theta-e advection...not anticipating any strong storms though some brief heavy rain can't be entirely ruled out where storms do manage to develop. && .SHORT TERM...(This Evening through Thursday) Issued at 321 PM EDT Wed Jun 3 2020 High clouds have kept heating limited today with main focus on new convective development from N MO into west central IL and central IN along remnant outflow boundary/area of convergence. It should be this area that experiences the greater severe threat going into this evening with the 1630Z Day 1 outlook representing this by removing much of the slight and marginal risk area. That being said, cloud cover is clearing out finally upstream across southern WI into N IL with temps in the mid 80s in SE WI. Some of the hi res models show development later this afternoon or evening that then drifts southeast and potentially impacts the area as instability increases. A weak disturbance will move through this evening that could aid in some additional development with very weak frontal boundary still draped across IA/N IL into N IN. Low confidence on how this will unfold with CAMs showing no consistency and did poor job handling overall setup today. Consensus of surrounding offices was to lower pops across far southern areas and go dry across the north. Will defer to evening crew to monitor any new development. No significant changes were made to Thursday with lingering showers possible across far south areas. Think we could end up fully dry but kept lower pops to match with surrounding offices in the south. && .LONG TERM...(Thursday Night through Wednesday) Issued at 321 PM EDT Wed Jun 3 2020 Northern stream system and associated cold front will move in Friday afternoon and night, bringing a chance for showers and thunderstorms to the area as well as an end to the warm and humid conditions. Doesn't look like a big impact at this point with regards to the convective threat, but will be at least some instability around for non-zero threat for a stronger storm. High pressure then builds in for the weekend with temperatures falling back to more seasonable levels in the 70s to maybe near 80 and lower humidity values. As upper level ridge axis shifts across the area, heat and humidity will begin to return with highs back well into the 80s. Shower and thunderstorm chances will increase as well next week with tropical moisture possibly being drawn in by mid week. && .AVIATION...(For the 00Z TAFS through 00Z Thursday Evening) Issued at 804 PM EDT Wed Jun 3 2020 Dry/VFR conditions will persist through the late evening. After 06Z...convection may be possible at KFWA as 850mb trough swings through the area. Confidence in thunder remains too low to mention though given poor midlevel lapse rates, limited moisture return, and weak forcing. Some hi-res guidance also indicates potential for MVFR ceilings during the early morning hours but this is predicated on convection developing in the area. Will hold VFR for now and adjust as convective trends become clearer later tonight. Some BR/ground fog also possible (primarily at KSBN) but dewpoints have dropped significantly and confidence is too low to include with this package. && .IWX WATCHES/WARNINGS/ADVISORIES... IN...NONE. MI...NONE. OH...NONE. LM...NONE. && UPDATE...AGD SYNOPSIS...Fisher SHORT TERM...Fisher LONG TERM...Fisher AVIATION...AGD 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 102 PM EDT Wed Jun 3 2020 INZ013-015-020-022>027-032>034-OHZ024-025-041715- Pulaski-Fulton IN-White-Cass IN-Miami-Wabash-Huntington-Wells-Adams- Grant-Blackford-Jay-Van Wert-Allen OH- 102 PM EDT Wed Jun 3 2020 This Hazardous Weather Outlook is for northern Indiana and northwest Ohio. .DAY ONE...This afternoon and tonight. Thunderstorms will remain possible this afternoon mainly south of a Winamac to North Manchester to Lima Ohio line. An isolated strong to severe thunderstorm cannot be ruled with with locally damaging winds and large hail. The threat should end by 8 pm EDT. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Scattered thunderstorms are possible Friday afternoon. Severe weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. LMZ043-046-041715- New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI- 102 PM EDT Wed Jun 3 2020 This Hazardous Weather Outlook is for the nearshore waters of southeastern Lake Michigan. .DAY ONE...This afternoon and tonight. A few thunderstorms may occur through late afternoon across southeastern Lake Michigan. Locally higher winds and waves will be possible. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. There is a chance of thunderstorms again Friday afternoon. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. INZ003>009-012-014-016>018-MIZ077>081-OHZ001-002-004-005-015-016- 041715- La Porte-St. Joseph IN-Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke- Marshall-Kosciusko-Whitley-Allen IN-Berrien-Cass MI-St. Joseph MI- Branch-Hillsdale-Williams-Fulton OH-Defiance-Henry-Paulding-Putnam- 102 PM EDT Wed Jun 3 2020 /1202 PM CDT Wed Jun 3 2020/ This Hazardous Weather Outlook is for northern Indiana, southwest Michigan and northwest Ohio. .DAY ONE...This afternoon and tonight. Thunderstorms will be possible through late afternoon across much of northern Indiana. Locally heavy rain and gusty winds will be possible with the stronger storms. However, the greatest threat for severe weather appears to have shifted to south of a Winamac to North Manchester to Lima Ohio line. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. There is a chance of thunderstorms again Friday afternoon. Severe weather is not anticipated at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Northern Indiana radar (KIWX), 87 km away, was scanning. The volume nearest the first event began at 04:01 UTC.
1 hail, 1 thunderstorm wind. Local standard time, as filed.
A few quarter sized hailstones, though most were penny or smaller. Reported via twitter.
Wind gusted to 65 mph twice. Reported via twitter.
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: 902883, 902885.