A cluster of strong to severe thunderstorms developed along an advancing warm front during the morning of June 16th. The storms remained well north of the I-74 corridor northward to I-80.
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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 ILX wrote it up.
A cluster of strong to severe thunderstorms developed along an advancing warm front during the morning of June 16th. The storms remained well north of the I-74 corridor northward to I-80. Some of the storms skirted across Stark County, resulting in minor wind damage and hail as large as quarters.
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 16, 1:48 PM CST, 36 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Lincoln IL 248 PM CDT Sun Jun 16 2024 .KEY MESSAGES... - A cluster of thunderstorms will impact locations northwest of a Macomb to Lacon line this afternoon. Gusty winds and heavy downpours will be possible. - Seasonably hot and humid weather is on tap this week. Heat index values will peak at or above 100 degrees both this afternoon and Monday afternoon before readings settle back into the middle to upper 90s for the remainder of the week. && .SHORT TERM...(Tonight through Monday Night) Issued at 248 PM CDT Sun Jun 16 2024 19z/2pm analysis shows a Mesoscale Convective Vortex (MCV) tracking northeastward across eastern Iowa. The airmass along/south of this feature is moderately unstable and weakly sheared...with MLCAPEs of 2000-2500J/kg but 0-6km bulk shear of only around 20kt. Given the instability/forcing present, a cluster of thunderstorms has accompanied the vortex across southeast Iowa into northwest Illinois. The primary severe weather risk with the storms will be damaging wind gusts...and these will mostly remain N/NW of the KILX CWA over the next few hours. Will need to keep an eye on the S/SW flank of the MCV to monitor for additional development. Regional satellite/radar mosaic has thus far shown little to no development, but the potential exists for storms along the outflow boundary on the southern edge of the strongest forcing. Severe Thunderstorm Watch has been issued until 8pm for Knox, Stark, and Marshall counties to address this risk. Any storms that skirt the N/NW CWA will exit into northern Illinois after 01z/8pm...with warm/dry conditions anticipated everywhere through the night. As deep-layer moist advection from the western Gulf of Mexico becomes better established, moisture profiles will become more favorable for rainfall on Monday. However, no synoptic or mesoscale boundaries will be present in order to serve as a focus for development. As a result, am expecting another hot and humid day with low chance PoPs (20-30%) for afternoon thunderstorms. High temperatures will be a degree or two warmer than today in the middle 90s, which will create heat index values in the 100-105 degree range. As was the case today, the heat will once again be somewhat mitigated by a southwest breeze gusting over 20mph. Barnes .LONG TERM...(Tuesday through Next Sunday) Issued at 248 PM CDT Sun Jun 16 2024 Much of the extended will feature hot and humid conditions with highs in the lower to middle 90s and heat index readings in the upper 90s to around 100 degrees. No appreciable frontal boundaries will come into the region until next weekend when synoptic models show a cold front settling southward into Illinois. As a result, PoPs will remain at a minimum until next Saturday night into Sunday. Barnes && .AVIATION... (For the 18z TAFs through 18z Monday Afternoon) Issued at 1237 PM CDT Sun Jun 16 2024 Clusters of thunderstorms currently over northeast Missouri/southeast Iowa will track northeastward this afternoon. While most of this activity will remain northwest of the central Illinois terminals, it will come close enough to justify VCTS at KPIA between 20z and 00z. Once the storms pass, dry weather is expected for the remainder of the 18z TAF period. Winds will be SW at 10-15kt with gusts of 20-25kt this afternoon, then the gusts will subside and sustained SW winds of around 10kt will continue through the night. Gusty SW winds will resume by mid-morning Monday. Barnes && .ILX WATCHES/WARNINGS/ADVISORIES... None. &&
Hazardous Weather Outlook National Weather Service Lincoln IL 306 PM CDT Sun Jun 16 2024 ILZ027-028-030-172015- Knox-Stark-Marshall- 306 PM CDT Sun Jun 16 2024 This Hazardous Weather Outlook is for central Illinois and west central Illinois. .DAY ONE...Tonight. A few thunderstorms are possible late this afternoon. An isolated damaging wind gust is possible, but the more common risks are cloud to ground lightning and heavy downpours. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Heat index values will reach near 100 degrees Monday afternoon. Mid to upper 90s daily peak heat index values will continue Tuesday through Saturday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. ILZ029-031-036>038-040>057-061-172015- Peoria-Woodford-Fulton-Tazewell-McLean-Schuyler-Mason-Logan-De Witt- Piatt-Champaign-Vermilion-Cass-Menard-Scott-Morgan-Sangamon- Christian-Macon-Moultrie-Douglas-Coles-Edgar-Shelby- 306 PM CDT Sun Jun 16 2024 This Hazardous Weather Outlook is for central Illinois, east central Illinois and west central Illinois. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Heat index values will reach near 100 degrees Monday afternoon. Mid to upper 90s daily peak heat index values will continue Tuesday through Saturday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. ILZ062-063-066>068-071>073-172015- Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence- 306 PM CDT Sun Jun 16 2024 This Hazardous Weather Outlook is for east central Illinois and southeast Illinois. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Heat index values will reach near 100 degrees Monday afternoon. Mid to upper 90s daily peak heat index values will continue Tuesday through Sunday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. 25
The Quad Cities radar (KDVN), 82 km away, was scanning. The volume nearest the first event began at 20:22 UTC.
1 thunderstorm wind, 1 hail. Local standard time, as filed.
A few 6-inch diameter tree limbs were blown down near the Toulon Sheriffs Office.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2024Every state in 2024This day in weather historyWarnings in Illinois, June 2024
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: 1186227, 1186226.