A warm and humid day unfolded across central Illinois on June 14th, with afternoon high temperatures topping out around 90 degrees and heat index values approaching 100. Ten people were overcome by heat while attending a gathering outside the state capital in Springfield.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 ILX wrote it up.
A warm and humid day unfolded across central Illinois on June 14th, with afternoon high temperatures topping out around 90 degrees and heat index values approaching 100. Ten people were overcome by heat while attending a gathering outside the state capital in Springfield.
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 Lincoln, IL wrote its last area forecast discussion before the first event at Jun 14, 10:08 AM CST, 52 minutes earlier.
Area Forecast Discussion National Weather Service Lincoln IL 1108 AM CDT TUE JUN 14 2016 .UPDATE... Issued at 1105 AM CDT Tue Jun 14 2016 The main band of convection from this mornings complex has departed east into Indiana from Vermilion and Edgar counties. A secondary line of convection just started to bubble up S of I-70, along an outflow boundary to the southwest of the departing MCV. That appears to be the primary focus for storms the rest of the morning, with more development this afternoon tied to a general destabilization of the lower levels northeast of a stationary front that extends from Rushville to Effingham. HRRR and RAP models continue to show multiple areas of convection developing across a majority of central and southeast IL after 17z/Noon, NE of the front. Areas with the least coverage appear to be SW of the front, including Jacksonville to Springfield to Effingham. Have updated the late morning into early afternoon weather. Temps and dewpoints appear on track, with highs topping out around 90 in much of the area. Areas with clouds and showers/storms will see temporary cooler periods, but a return to sunshine will quickly boost temps back toward 90 this afternoon. Updated forecast info is already available. && .SHORT TERM...(Today) ISSUED AT 346 AM CDT Tue Jun 14 2016 One short wave has moved northeast of the CWA early this morning and another one is forecast to lift toward the area later this morning and continue into the afternoon. HiRes short-term models indicate scattered convection develops with this next short wave and lifts it toward the area. Some of the convection dissipates in the northwest while other continues in the northeast and east. So early hours will have very little pcpn in the west, by late morning and through the afternoon will keep chc pops in the forecast to account for the next short wave and the threat of afternoon convection due to heating along with the short wave moving northeast during the day. Per SPC, entire CWA is in a Marginal risk for severe weather today. This seems reasonable given lack of stronger forcing and wind dynamics. Winds will remain lighter, but out of the south through the period. Sky cover should be partly sunny, allowing for temps to rise to around 90 by afternoon. Combined with dewpoints in the lower 70s...and heat index values will be in the middle 90s. .LONG TERM...(Tonight through Monday) ISSUED AT 346 AM CDT Tue Jun 14 2016 00Z ECMWF model was delayed for this forecast package and just recently arrived to be viewed. Overall 00Z models have continued to trend quicker with frontal boundary on Wed afternoon and continue slight risk of severe storms over much of central and eastern IL. The heat wave that started on Thu/June 9, looks to continue through Wednesday across central and southeast IL. High heat and humidity brings highs in the lower 90s and dewpoints peaking from 70-75F. This to give afternoon heat indices around 100F Wed afternoon. Other concern is convection chances through Wed as airmass gets quite unstable especially by Wed afternoon when CAPES peak from 2500- 4000 J/kg, while 0-6 km bulk shear is 20-30 kts. SPC has entire CWA (except western Schuyler county) in a slight risk of severe storms Wed afternoon while enhanced risk is over much of Marshall, Woodford, McLean, Champaign and Vermilion counties. Main severe wx threat is damaging wind gusts followed by large hail. Heavy rains again a risk on Wed with precipitable water values that are around 2 inches today, and staying that high in eastern IL on Wed while starting to lower in western IL as a frontal boundary pushes into central IL during Wed afternoon. 00Z models have trended quicker with this frontal boundary and therefore have removed pops over much of eastern IL on Wed evening and best forcing shifts east of IL into Indiana. Upper level low/trof will be over the eastern great lakes on Thu while upper level ridging building back northward just west of the MS river over the eastern plains. GFS models puts some qpf in ne cwa Thu afternoon, but will side with drier NAM/ECMWF/GEM models, though more cumulus clouds could appear in northeast CWA by Thu afternoon. Highs Thu range from mid 80s far northern CWA by Knox, Stark and Marshall counties to around 90F or even lower 90s sw CWA. Dewpoints a bit lower on Thu in the mid to upper 60s, so heat indices Thu afternoon are lower, in upper 80s to mid 90s, so still a very warm day. Highs Friday a bit cooler mostly in the mid 80s across the area while dewpoints lower into the upper 50s and lower 60s. Upper level ridge slowly builds eastward into IL and the Great Lakes by this weekend, bringing dry and very warm weather. Highs in the upper 80s Sat and around 90F Sun/Mon. Not too humid yet with dewpoints of 55-60F on Saturday and elevating into the lower 60s on Sunday, and low to mid 60s Monday. Have slight chances of showers and thunderstorms dropping southeast into central IL late Sunday night and Monday with a weak weather system dropping into the Great Lakes region. && .AVIATION...(For the 12Z TAFS through 12Z Wednesday morning) Issued at 637 AM CDT Tue Jun 14 2016 A weak short wave is moving through the area and producing thunderstorms at CMI only. Based on radar and HiRes models, other sites will be dry this morning. So, only expecting scattered clouds at the sites. CMI will see thunderstorms for an hour, but then have VCTS through 14z. Have light fog at other sites for about an hour this morning. After a dry period through late this morning, the moist airmass in place will allow for scattered convection to develop early this afternoon. So, VCTS is good forecast for all TAFs for this afternoon. There should be another break in pcpn chances this evening until the cold front begins to move toward the area, late tonight. So have added another VCTS at all sites for late tonight. Winds will be light and variable this morning but then become southerly at near 10kts through the day. South to southwest winds will continue overnight. && .ILX Watches/Warnings/Advisories... NONE. && UPDATE...Shimon SHORT TERM...Auten LONG TERM...07 AVIATION...Auten
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LINCOLN IL 533 AM CDT TUE JUN 14 2016 ILZ027>029-036-037-040>044-047>057-061>063-066>068-071>073-151100- CASS-CHRISTIAN-CLARK-CLAY-COLES-CRAWFORD-CUMBERLAND-DE WITT- DOUGLAS-EDGAR-EFFINGHAM-FULTON-JASPER-KNOX-LAWRENCE-LOGAN-MACON- MASON-MENARD-MORGAN-MOULTRIE-PEORIA-PIATT-RICHLAND-SANGAMON- SCHUYLER-SCOTT-SHELBY-STARK-TAZEWELL- 533 AM CDT TUE JUN 14 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS...EAST CENTRAL ILLINOIS...NORTH CENTRAL ILLINOIS...SOUTH CENTRAL ILLINOIS...SOUTHEAST ILLINOIS AND WEST CENTRAL ILLINOIS. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL BE POSSIBLE THROUGH TONIGHT. SOME STRONGER STORMS COULD CONTAIN HAIL AND GUSTY WINDS...HOWEVER WIDESPREAD SEVERE WEATHER IS NOT EXPECTED. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY ADDITIONAL THUNDERSTORMS WILL OCCUR AHEAD OF AN ADVANCING COLD FRONT WEDNESDAY INTO WEDNESDAY EVENING. THERE IS A SLIGHT RISK THAT SOME OF THESE STORMS WILL BE SEVERE...PRODUCING LARGE HAIL AND DAMAGING WINDS. HOT AND HUMID WEATHER WILL CONTINUE THROUGH WEDNESDAY...WITH MAXIMUM HEAT INDEX VALUES RANGING FROM THE MIDDLE 90S TO AROUND 100. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT. ILZ030-031-038-045-046-151100- CHAMPAIGN-MARSHALL-MCLEAN-VERMILION-WOODFORD- 533 AM CDT TUE JUN 14 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS AND EAST CENTRAL ILLINOIS. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL BE POSSIBLE THROUGH TONIGHT. SOME STRONGER STORMS COULD CONTAIN HAIL AND GUSTY WINDS...HOWEVER WIDESPREAD SEVERE WEATHER IS NOT EXPECTED. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY ADDITIONAL THUNDERSTORMS WILL OCCUR AHEAD OF AN ADVANCING COLD FRONT WEDNESDAY INTO WEDNESDAY EVENING. THESE STORMS ARE EXPECTED TO BE SEVERE WITH LARGE HAIL AND DAMAGING WINDS LIKELY. THERE IS THE THREAT THAT THE SEVERE WEATHER WILL BE MORE WIDESPREAD AND INTENSE NORTHEAST OF I-74...SO THE AREA IS IN AN ENHANCED RISK FOR SEVERE WEATHER. HOT AND HUMID WEATHER WILL CONTINUE THROUGH WEDNESDAY...WITH MAXIMUM HEAT INDEX VALUES RANGING FROM THE MIDDLE 90S TO AROUND 100. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT. AUTEN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
841 AM CDT TUE JUN 14 2016
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 AM HEAVY RAIN LACON 41.02N 89.41W
06/14/2016 M1.03 INCH MARSHALL IL CO-OP OBSERVER
&&
JRPPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
1043 AM CDT TUE JUN 14 2016
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM HEAVY RAIN NE MURRAYVILLE 39.58N 90.25W
06/14/2016 M2.80 INCH MORGAN IL MESONET
0.4 NE
0700 AM HEAVY RAIN 3 W ELLSWORTH 40.45N 88.77W
06/14/2016 M2.45 INCH MCLEAN IL MESONET
2.5 W
0700 AM HEAVY RAIN 2 ENE PHILO 40.01N 88.12W
06/14/2016 M1.48 INCH CHAMPAIGN IL MESONET
1.9 ENE
0700 AM HEAVY RAIN 1 SSE LEXINGTON 40.63N 88.78W
06/14/2016 M1.34 INCH MCLEAN IL MESONET
0.5 SSE
0700 AM HEAVY RAIN 2 NNE ARROWSMITH 40.48N 88.62W
06/14/2016 M1.30 INCH MCLEAN IL MESONET
1.7 NNE
&&
JRPPRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LINCOLN IL
1044 AM CDT TUE JUN 14 2016
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM HEAVY RAIN NE MURRAYVILLE 39.58N 90.25W
06/14/2016 M2.80 INCH MORGAN IL MESONET
0.4 NE
0700 AM HEAVY RAIN 3 W ELLSWORTH 40.45N 88.77W
06/14/2016 M2.45 INCH MCLEAN IL MESONET
2.5 W
0700 AM HEAVY RAIN 2 ENE PHILO 40.01N 88.12W
06/14/2016 M1.48 INCH CHAMPAIGN IL MESONET
1.9 ENE
0700 AM HEAVY RAIN 1 SSE LEXINGTON 40.63N 88.78W
06/14/2016 M1.34 INCH MCLEAN IL MESONET
0.5 SSE
0700 AM HEAVY RAIN 2 NNE ARROWSMITH 40.48N 88.62W
06/14/2016 M1.30 INCH MCLEAN IL MESONET
1.7 NNE
0800 AM HEAVY RAIN LACON 41.02N 89.41W
06/14/2016 M1.03 INCH MARSHALL IL CO-OP OBSERVER
&&
JRPThe national radar mosaic for the moment the first event began.
1 heat. Local standard time, as filed.
Ten people were overcome by heat while attending a gathering outside the state capital in Springfield. Four of them were transported to the hospital. The temperature at the time of the event was 89 degrees and the heat index was 98.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2016Every state in 2016This day in weather historyWarnings in Illinois, June 2016
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: 637303.