After below normal rainfall during the month of May, even drier conditions developed across central Illinois for much of the month of June until a significant storm system brought 1 to 2 inches of rain to the region on June 29th. From May 1st through June 28th, many locations experienced rainfall deficits of 4 to 7 inches.
Every event with a place to put it; 28 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.
After below normal rainfall during the month of May, even drier conditions developed across central Illinois for much of the month of June until a significant storm system brought 1 to 2 inches of rain to the region on June 29th. From May 1st through June 28th, many locations experienced rainfall deficits of 4 to 7 inches. As a result, Severe Drought Conditions (D2) developed along and northeast of a Jacksonville...to Shelbyville...to Marshall line.
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 12, 10:34 PM CST, 26 minutes earlier.
Area Forecast Discussion...Updated Aviation National Weather Service Lincoln IL 1134 PM CDT Mon Jun 12 2023 .SYNOPSIS... Issued at 1134 PM CDT Mon Jun 12 2023 A few light rain showers will develop from this evening into Tuesday morning, primarily north of I-74. Expect isolated to scattered showers and thunderstorms Tuesday afternoon, along with gusty west winds. Otherwise, gradually warming temperatures are forecast through Thursday. The next chance for widespread rain arrives this weekend. && .UPDATE... Issued at 856 PM CDT Mon Jun 12 2023 Light rain showers associated with a shortwave over NE Iowa/northern IL have developed in northern portions of the forecast area, mainly I-74 northward, west of I-55. No evidence so far of measurable rainfall, although up to a tenth of an inch was noted not far away in Quad Cities area observations. Have updated PoPs to bring rain chances in a bit earlier than previously forecast based on radar trends, but overall this feature looks well on track, slowly tracking eastward, with scattered light showers and virga from I-74 northward. Very dry low level air, with dewpoints in the lower 40s currently, will continue to inhibit any substantial rain reaching the ground. Otherwise, lows look on track to reach the mid 50s overnight, and a breezy west to southwest wind will continue overnight. 37 && .SHORT TERM... (Through Late Tuesday Night) Issued at 333 PM CDT Mon Jun 12 2023 This afternoon's surface analysis shows central Illinois between a surface high centered over the central/southern Plains and lower pressure to the northeast, maintaining northwesterly to westerly winds. At least a pair of short wave troughs will rotate around a closed low centered over the Great Lakes from this evening into Tuesday. Mid-level clouds and a few light showers associated with a 700 mb wind speed max are seen on water vapor imagery from western WI and eastern IA moving into the northwest corner of IL. This first round of showers is forecast to affect primarily areas north of I-74 from early this evening until early Tuesday morning. These showers should mostly be light, with thunder probability low but an isolated lightning strike or two not out of the question. The next short wave trough is forecast to drop down out of WI on Tuesday afternoon, with a more extensive area of showers and thunderstorms developing near and along the southern edges of the aforementioned 700 mb wind speed max.although HRRR forecast MLCAPE reaches values on the order of a couple hundred J/kg, with 850 mb winds to around 35 kt. Precip chances have been increased in accordance with coverage in the isolated to scattered category. An isolated hail report, or even more likely, convectively enhanced wind gusts may occur. The greatest chances for rainfall > 0.25" on Tuesday afternoon/evening are near/north of I-74, with spottier rainfall and lesser amounts forecast to the southwest of that. Even aside from the convection, a notable increase in wind speeds is forecast for the period from Tuesday morning through early Tuesday evening. HREF mean wind gusts in this period are mainly in the 25-35 mph range, with a bit of an enhancement possibly occurring just after sunrise on Tuesday in association with the first short wave trough. Precipitation chances may hold on into Tuesday evening especially in far northeastern portions of the ILX forecast area, but are expected to fade into Wednesday morning with much lighter winds overnight. AAT .LONG TERM... (Wednesday through Next Monday) Issued at 333 PM CDT Mon Jun 12 2023 Key Messages: 1. Temperatures may quickly warm to near or above 90 F by Thursday. 2. Next notable chance for widespread rain in central Illinois is Saturday. After starting the week with temperatures around 10 F or more below normal for mid-June, temperatures are forecast to warm quickly this week, potentially reaching values approaching 90 F on Thursday. As the Great Lakes closed low moves eastward, a ridge is forecast to exert stronger influence on central Illinois by mid-late week, though a short wave trough dropping south out of Ontario could affect the ILX forecast area yet on Thursday. It's probabilities at this point...with probabilities of achieving 90 F on Thursday highest west of the IL river (around 60-80%) where influence from the short wave should be least. Probabilities are closer to the 10-30% range near the Indiana state line. Dew points Thursday are currently forecast to be in the mid-50s F, so heat indices shouldn't be terribly uncomfortable. The next notable chance for widespread rain occurs on Saturday as a short wave trough makes its way across the central Plains toward the Midwest. The probability of precipitable water values > 1.5" across the ILX forecast area ranges from 20-60% on Saturday afternoon, increasing from northwest to southeast. Mean forecast rainfall values are currently around 0.25", with the probability of rainfall > 0.5" ranging from 30-50%. AAT && .AVIATION... (For the 06z TAFs through 06z Tuesday Night) Issued at 1134 PM CDT Mon Jun 12 2023 Primarily VFR conditions are expected over the upcoming 24 hours. A few showers could approach KPIA-KBMI-KCMI tonight, although this shower activity is expected to remain primarily to the north. Another disturbance Tuesday afternoon could bring more showers and perhaps a few thunderstorms for much of the area, although chances are too small for any precipitation mention as far southwestward as KSPI. At this point only have VCSH mentioned in other area TAFs with precipitation/thunderstorm coverage expected to be on the low side. Shower activity should diminish by 02Z-04Z Wednesday as the disturbance swings eastward. Winds W 6-12 kts overnight, increasing to 15-20 kts with gusts around 25 kts after 14Z. Winds diminishing after 01Z-04Z. WNW winds around 40 kts at the 2000 ft level should promote a period of low-level wind shear from around 09Z-13Z tonight. 37 && .ILX WATCHES/WARNINGS/ADVISORIES... None. &&
Hazardous Weather Outlook National Weather Service Lincoln IL 259 PM CDT Mon Jun 12 2023 ILZ040-047-049>052-061-066>068-071>073-132000- Schuyler-Cass-Scott-Morgan-Sangamon-Christian-Shelby-Effingham- Jasper-Crawford-Clay-Richland-Lawrence- 259 PM CDT Mon Jun 12 2023 This Hazardous Weather Outlook is for central Illinois, southeast Illinois and west central Illinois. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Westerly wind gusts of 30 to 40 mph are expected during the day Tuesday, which could blow around unsecured objects and create minor travel difficulties for high profile vehicles. Scattered thunderstorms are expected Friday afternoon through Sunday. Severe weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. ILZ027>031-036>038-041>046-048-053>057-062-063-132000- Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Mason- Logan-De Witt-Piatt-Champaign-Vermilion-Menard-Macon-Moultrie- Douglas-Coles-Edgar-Cumberland-Clark- 259 PM CDT Mon Jun 12 2023 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...Tuesday through Sunday. Scattered thunderstorms are possible Tuesday afternoon. Severe weather is not expected. Westerly wind gusts of 30 to 40 mph are expected during the day Tuesday, which could blow around unsecured objects and create minor travel difficulties for high profile vehicles. Scattered thunderstorms are expected Friday afternoon through Sunday. Severe weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. Erwin
The national radar mosaic for the moment the first event began.
28 drought. Local standard time, as filed.
Severe Drought (D2) conditions developed across Stark County on June 13th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Marshall County on June 13th and persisted through the end of the month. Agricultural stress was common and several communities instituted burn bans across the county.
Severe Drought (D2) conditions developed across Peoria County on June 13th and persisted through the end of the month. Agricultural stress was common across the county and the community of Mapleton instituted a burn ban.
Severe Drought (D2) conditions developed across Tazewell County on June 13th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Woodford County on June 13th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Fulton County on June 20th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across McLean County on June 20th and persisted through the end of the month. Agricultural stress was common and several communities instituted burn bans across the county.
Severe Drought (D2) conditions developed across Champaign County on June 20th and persisted through the end of the month. Agricultural stress was common across the county and the Homer Fire District instituted a burn ban.
Severe Drought (D2) conditions developed across Vermilion County on June 20th and persisted through the end of the month. Agricultural stress was common across the county and both Danville and Hoopeston instituted a burn ban.
Severe Drought (D2) conditions developed across Schuyler County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Mason County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Cass County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Scott County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Morgan County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Menard County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Sangamon County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Logan County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across DeWitt County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Macon County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Shelby County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Piatt County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Moultrie County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Coles County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Cumberland County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Clark County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Edgar County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Severe Drought (D2) conditions developed across Douglas County on June 27th and persisted through the end of the month. Agricultural stress was common and several communities instituted burn bans across the county.
Severe Drought (D2) conditions developed across Knox County on June 20th and persisted through the end of the month. Agricultural stress was common across the county.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2023Every state in 2023This day in weather historyWarnings in Illinois, June 2023
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: 1104193, 1104195, 1104196, 1104197, 1104198, 1104200, 1104201, 1104203, 1104205, 1104207, 1104208, 1104209, 1104211, 1104212, 1104213, 1104214, 1104215, 1104217, 1104218, 1104219, 1104220, 1104221, 1104222, 1104223, 1104224, 1104225, 1104226, 1104228.