A major outbreak of severe weather occurred on the 8th for the Quad State region. On the synoptic scale, a longwave trough was centered across the Rockies with deep-layer southwesterly flow from the Southern Plains to the Ohio Valley.
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 PAH wrote it up.
A major outbreak of severe weather occurred on the 8th for the Quad State region. On the synoptic scale, a longwave trough was centered across the Rockies with deep-layer southwesterly flow from the Southern Plains to the Ohio Valley. A 110 kt upper jet extended from northern KS to IA while a 60 kt mid-level jet was positioned across northern MZ into IA. Surface low pressure near the MZ/KS border lifted to St. Louis around 12am CST on the 9th. A warm frontal boundary stretched across the Quad State, with a cold front extending southward from the surface low.
The environment became unstable by early afternoon, especially in far Southern Illinois, with MLCAPE of 2000-3000 J/kg. Deep-layer shear was on the order of 55-65 kts, though low-level shear was 15 kts, increasing to 20 kts later in the day. SRH was around 100-150 m2/s2 with higher values north towards St. Louis. STP values were 2-4 due to deep-layer shear and instability. Supercell activity was more prominent during the afternoon in Southern Illinois with lapse rates of 6.5-7 C/km aiding with hail production.
For Southern Illinois, storms moved through with the cold front late evening on the 7th through the overnight hours with tree and power line damage in Joppa. The front reversed and lifted north during the morning, with storms entering Southwest Illinois late morning. A brief EF-1 tornado in Cora damaged trees and a few homes while injuring one person due to a falling tree limb. The afternoon brought a significant ramping up of supercell development and the arrival of a line of storms from the west. An EF-0 tornado crossed from Jackson County into Williamson County. An EF-0 tornado went through central subdivisions of the Lake of Egypt community, while an EF-1 tornado progressed eastward in Saline County with a broader area of straight-line wind damage around it. An initial evening round of storms swept through the northern half of Southern Illinois with wind damage most prominent in northern Wayne County with a swath of 75 to 85 mph straight-line wind damage and an embedded downburst.
Training heavy rainfall during the afternoon produced flash flooding from Jackson County eastward with rainfall totals commonly in the 2.5-4 inch range for northern Jackson, Williamson, Saline, Gallatin, and northern Union County. Hardest hit by flooding were Eldorado and Harrisburg in Saline County which received 1.5-2 inches within an hour. In Eldorado, Ferrell Hospital had floodwaters intrude on 55,000 sq ft of hospital space, necessitating transfer of patients. The high school had water in the entrance areas, and numerous roads flooded. Harrisburg avoided some of the higher end impacts of Eldorado but had many roads flooded for much of the afternoon and evening.
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 Paducah, KY wrote its last area forecast discussion before the first event at May 7, 5:36 PM CST, 6 hours 36 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Paducah KY 636 PM CDT Tue May 7 2024 .KEY MESSAGES... - Remain weather aware today through Wednesday evening as multiple rounds of severe weather are expected, and the potential exists for a higher end storm system Wednesday. - Scattered showers and thunderstorms are expected to develop from mid-afternoon through the evening, with some of these storms strong to severe. - Storms begin again Wednesday morning as a warm front lifts northward. A more significant and widespread severe thunderstorm outbreak is expected as a storm complex moves across the forecast area later in the day Wednesday, with a cold front bringing additional storms in the evening. - Repeated rounds of heavy rainfall can result in localized flooding issues, with the highest chances Wednesday afternoon and evening. - Cooler and drier air moves in for the end of the week and weekend with highs in the 70s and lower humidity. && .DISCUSSION... Issued at 304 PM CDT Tue May 7 2024 Following the morning storms, skies have remained mostly cloudy across the Quad State region. Despite the patches of cloud cover, temperatures have risen to the upper 70s to the lower 80s. The first initial afternoon showers have struggled to get going, with better convection north of the forecast area. The environment has many robust parameters this afternoon. SBCAPE above 3000 with MLCAPE above 2000-2500 provides plenty of instability. 0-6km shear is around 60 kts (higher to the northwest outside the CWA), and STP is at 3-4, while 0-3 km shear is 20-35 kts for now. While dew points are near 70, storms are not firing at this time. One parameter that is lacking is mid-level lapse rates which are around 6-6.5 C/km and slight capping is present around 850 mb. The right exit region of the jet is near I-64 at this time, also limiting development, but should shift away to the northeast by the evening. Models focus late afternoon development further near the I-64 corridor with surface convergence near St Louis on satellite, though storms are possible elsewhere. These storms are more likely to take the form of discrete cells/supercells. For the evening hours, the more favorable development will be near and south of the Ohio River, with a more patchy linear development. All severe hazards remain possible with these storms, albeit with hail potential skewed more towards the afternoon hours rather than later in the evening. Flooding potential today is fairly limited, as long as any linear development this evening progresses southward. This rainfall would set the stage for tomorrow. For the overnight hours, a brief break in rainfall is anticipated. Partial clearing, especially in the north, could allow for brief development of patchy fog with calm winds. The cold front stalls out overnight, reversing course back north during the morning as a warm front as low pressure tracks northeastward from Oklahoma towards St Louis. Models differ in positioning, strength, and timing, but are better aligned on morning convection developing with the warm front. Strong to severe storms are possible, more likely later in the morning. After these repeated rounds of storms today and tomorrow morning, the main event is likely to be a robust squall line moving through during the afternoon hours tomorrow. Supercells are possible ahead of the squall line which, depending on morning activity, may encounter a clear warm sector environment suitable for a sustained track. Models differ on whether the afternoon MCS remains connected with the cold front in Arkansas or surges out ahead. CAPE is roughly as high as today, and more robust helicity and shear are expected along with mid-level lapse rates rising to around 8C/km, providing a much more favorable environment if the morning storms progress far enough to allow for recovery before the afternoon MCS. The main MCS should limit any follow up storm development but portions of SEMO or Western Kentucky that stay just south of the afternoon storms will have better lingering potential for the evening. All hazards are on the table, including significant wind or strong tornadoes. With the warm front in the morning, and robust storm activity in the afternoon, along with prior rainfall, localized flooding issues are likely to develop Wednesday. Exact positioning is limited due to uncertainty in warm front location and stalling potential. Cooler and much drier air surges in Wednesday night following the front. More seasonal temperatures are expected for the end of week and weekend with fairly dry weather as most models keep a Great Lakes system to our northeast for the weekend. A Four Corners system tracks eastward, returning PoPs to the forecast early next week. && .AVIATION /00Z TAFS THROUGH 00Z THURSDAY/... Issued at 629 PM CDT Tue May 7 2024 Convection is struggling to get going this evening; however, not completely out of the question to have a few showers and storms over the next two to three hours. Gusty winds and heavy downpours will be the main threats along with brief MVFR conditions. A break can be expected in any convection overnight, but some fog may form, especially where rainfall occurs. A warm front will lift north through the area Wednesday bringing more widespread chances for showers and storms early in the afternoon and especially toward the evening hours. Severe weather with gusty winds and hail will be possible. && .PAH WATCHES/WARNINGS/ADVISORIES... IL...None. MO...None. IN...None. KY...None. && DISCUSSION...ATL AVIATION...KC
Hazardous Weather Outlook National Weather Service Paducah KY 1219 AM CDT Wed May 8 2024 ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087- 100-107>112-114-081000- Jefferson-Wayne IL-Edwards-Wabash-Perry IL-Franklin-Hamilton- White-Jackson-Williamson-Saline-Gallatin-Union-Johnson-Pope- Hardin-Alexander-Pulaski-Massac-Gibson-Pike-Posey-Vanderburgh- Warrick-Spencer-Fulton-Hickman-Carlisle-Ballard-McCracken-Graves- Livingston-Marshall-Calloway-Crittenden-Lyon-Trigg-Caldwell- Union KY-Webster-Hopkins-Christian-Henderson-Daviess-McLean- Muhlenberg-Todd-Perry MO-Bollinger-Cape Girardeau-Wayne MO-Carter- Ripley-Butler-Stoddard-Scott-Mississippi-New Madrid- 1219 AM CDT Wed May 8 2024 /119 AM EDT Wed May 8 2024/ This Hazardous Weather Outlook is for portions of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri. .DAY ONE...Tonight Ongoing thunderstorms will have an all severe hazards threat tonight, as they move from southeast Missouri, southern Illinois, and southwest Indiana, into and across western Kentucky. In addition, locally heavy rains will cause a flood hazard, and frequent lightning will be a common hazard with all storms. Heed any Watches and Warnings issued. .DAYS TWO THROUGH SEVEN...Wednesday through Monday A significant severe thunderstorm outbreak is expected Wednesday. Potential severe weather begins by mid to late morning with the warm front's approach. The primary severe weather threat will be Wednesday afternoon and evening as the cold front then makes its approach. Damaging winds, large hail, and tornadoes are possible. Localized flooding is also possible where repeat heavy rainfall may occur. Lightning too will be a commonplace hazard. .SPOTTER INFORMATION STATEMENT... Spotter activation is expected tonight and Wednesday.
Special Weather Statement
National Weather Service Paducah KY
1129 PM CDT Tue May 7 2024
ILZ082-083-086-087-080500-
White IL-Saline IL-Hamilton IL-Gallatin IL-
1129 PM CDT Tue May 7 2024
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN WHITE...NORTHERN
SALINE...SOUTHEASTERN HAMILTON AND NORTHWESTERN GALLATIN COUNTIES
THROUGH MIDNIGHT CDT...
At 1129 PM CDT, Doppler radar was tracking a strong thunderstorm over
Galatia, or 8 miles northwest of Harrisburg, moving east at 35 mph.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Eldorado, Galatia, and Raleigh.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Tornado Watch remains in effect until 200 AM CDT for southern,
south central and southeastern Illinois.
&&
LAT...LON 3795 8833 3791 8832 3782 8828 3778 8870
3787 8870 3794 8838
TIME...MOT...LOC 0429Z 258DEG 31KT 3784 8861
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
DWSpecial Weather Statement
National Weather Service Paducah KY
1145 PM CDT Tue May 7 2024
ILZ083-086-087-090-INZ085-086-KYZ014-018-080530-
White IL-Saline IL-Gallatin IL-Pope IL-Posey IN-Vanderburgh IN-
Henderson KY-Union KY-
1145 PM CDT Tue May 7 2024
...STRONG THUNDERSTORMS WILL IMPACT SOUTH CENTRAL WHITE...
NORTHEASTERN POPE...SOUTHEASTERN SALINE...GALLATIN...SOUTHWESTERN
VANDERBURGH...SOUTHERN POSEY...NORTHWESTERN HENDERSON AND CENTRAL
UNION COUNTIES THROUGH 1230 AM CDT...
At 1145 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles southwest of Mount Vernon to near
Shawneetown to 7 miles southeast of Carrier Mills. Movement was east
at 25 mph.
HAZARD...Wind gusts up to 50 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Morganfield, Shawneetown, Breckinridge Center, Uniontown, Ridgway,
Waverly, Old Shawneetown, and Junction.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Tornado Watch remains in effect until 200 AM CDT for southern and
southeastern Illinois...southwestern Indiana...and northwestern
Kentucky.
&&
LAT...LON 3795 8759 3763 8787 3760 8825 3759 8857
3771 8836 3790 8814
TIME...MOT...LOC 0445Z 270DEG 20KT 3787 8797 3764 8817 3760 8856
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
DWSpecial Weather Statement
National Weather Service Paducah KY
1153 PM CDT Tue May 7 2024
ILZ092>094-KYZ004-005-MOZ112-080530-
Massac IL-Alexander IL-Pulaski IL-McCracken KY-Ballard KY-
Mississippi MO-
1153 PM CDT Tue May 7 2024
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL PULASKI...WESTERN
MASSAC...SOUTHEASTERN ALEXANDER...CENTRAL BALLARD...NORTHWESTERN
MCCRACKEN AND NORTH CENTRAL MISSISSIPPI COUNTIES THROUGH 1230 AM
CDT...
At 1153 PM CDT, Doppler radar was tracking a strong thunderstorm over
Mound City, or near Cairo, moving east at 35 mph.
HAZARD...Wind gusts up to 50 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Cairo, La Center, Mounds, Barlow, Mound City, Kevil, and Olmsted.
This includes Interstate 57 in Illinois between Mile Markers 1 and
11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Tornado Watch remains in effect until 200 AM CDT for southern
Illinois...western Kentucky...and southeastern Missouri.
&&
LAT...LON 3715 8926 3726 8888 3704 8887 3701 8926
TIME...MOT...LOC 0453Z 257DEG 30KT 3711 8917
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
DWSpecial Weather Statement
National Weather Service Paducah KY
1200 AM CDT Wed May 8 2024
INZ086>088-KYZ014-015-018>020-080545-
Warrick IN-Vanderburgh IN-Spencer IN-Henderson KY-Webster KY-
Union KY-McLean KY-Daviess KY-
1200 AM CDT Wed May 8 2024
...STRONG THUNDERSTORMS WILL IMPACT WARRICK...SOUTHERN VANDERBURGH...
SPENCER...NORTHWESTERN DAVIESS...HENDERSON...NORTHWESTERN MCLEAN...
CENTRAL UNION AND NORTH CENTRAL WEBSTER COUNTIES THROUGH 1245 AM
CDT...
At 1159 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Lynnville to near Sturgis. Movement was
east at 45 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Evansville, Henderson, Boonville, Newburgh, Morganfield, Chandler,
Melody Hill, Breckinridge Center, Sebree, Dale, Lynnville, Corydon,
Robards, Santa Claus, Folsomville, Stanley, Eureka, Chrisney,
Waverly, and Tennyson.
This includes the following highways...
Interstate 69 in Kentucky between Mile Markers 135 and 148.
Interstate 69 in Indiana between Mile Markers 1 and 13.
Interstate 64 in Indiana between Mile Markers 39 and 41, between
Mile Markers 46 and 49, and between Mile Markers 51 and 60.
Audubon Parkway between Mile Markers 1 and 18.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Tornado Watch remains in effect until 200 AM CDT for southwestern
Indiana...and northwestern Kentucky.
&&
LAT...LON 3812 8681 3811 8680 3761 8745 3761 8811
3789 8772 3789 8771 3791 8770 3820 8729
3820 8679 3814 8680 3812 8679
TIME...MOT...LOC 0459Z 265DEG 40KT 3813 8730 3761 8804
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
DWSpecial Weather Statement
National Weather Service Paducah KY
1243 AM CDT Wed May 8 2024
INZ088-KYZ015-016-018>020-080630-
Spencer IN-Henderson KY-Webster KY-McLean KY-Hopkins KY-Daviess KY-
1243 AM CDT Wed May 8 2024
...STRONG THUNDERSTORMS WILL IMPACT CENTRAL SPENCER...DAVIESS...
SOUTHEASTERN HENDERSON...MCLEAN...NORTHEASTERN HOPKINS AND
NORTHEASTERN WEBSTER COUNTIES THROUGH 130 AM CDT...
At 1243 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 11 miles northeast of Santa Claus to Dixon.
Movement was east at 30 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Owensboro, Rockport, Calhoun, Sebree, Livermore, Grandview,
Whitesville, Knottsville, St. Joseph, Masonville, Stanley, Beech
Grove, Island, Slaughters, and Moseleyville.
This includes the following highways...
Interstate 165 between Mile Markers 60 and 70.
Interstate 69 in Kentucky between Mile Markers 125 and 136.
Audubon Parkway between Mile Markers 13 and 23.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Tornado Watch remains in effect until 200 AM CDT for southwestern
Indiana...and south central and northwestern Kentucky.
&&
LAT...LON 3801 8680 3799 8686 3794 8692 3793 8698
3790 8699 3790 8691 3784 8691 3784 8686
3779 8682 3774 8682 3771 8686 3767 8682
3763 8695 3755 8705 3747 8711 3748 8713
3741 8710 3750 8770 3816 8680 3800 8677
TIME...MOT...LOC 0543Z 277DEG 25KT 3818 8673 3749 8769
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
DWPreliminary Local Storm Report
National Weather Service Paducah KY
1257 AM CDT Wed May 8 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1256 AM Tstm Wnd Gst Advance 37.10N 89.91W
05/08/2024 E60 MPH Stoddard MO Public
Wind gusts estimated 50 to 60 mph along with
pea size hail.
&&The Paducah radar (KPAH), 16 km away, was scanning. The volume nearest the first event began at 06:10 UTC.
13 thunderstorm wind, 7 hail, 6 flash flood, 5 tornado, 3 flood, 1 funnel cloud. Local standard time, as filed.
Thunderstorm winds blew down a healthy tree approximately 15 inches in diameter across Joppa Road, taking power lines down as well.
An EF-1 tornado impacted the the community of Cora in extreme western Jackson County, IL. The tornado began south of Cora where it uprooted a tree in the Mississippi River bottomlands and did roof damage to a nearby barn. Moving north, the tornado did significant tree damage in Cora and did roof, siding, and fascia damage to a few homes. A couple small barns and a carport were destroyed as well. One manufactured home slid about a foot off its foundation. One person caught outside by the tornado was injured by a falling tree limb. The tornado ended immediately north of Cora. Peak winds with this tornado were estimated at 108 mph.
Golf ball size hail was reported on Yellow Banks Rd south of Christopher. Hail estimated to quarter size was reported via mPING in Buckner. Dime size hail was also reported by emergency management just south of Mulkeytown. Both of the latter locations were on the north side of a hail core from a very strong storm moving northeastward across Franklin County.
A funnel cloud was spotted in a developing supercell storm. A tornado would later be produced from this storm further east.
Hail estimated to penny size was reported west of Ava.
An EF-1 tornado (max of EF-0 in Jackson County) began southeast of Carbondale at Giant City Rd. Several large tree limbs were downed on Wagon Wheel Road and County Line Rd as the tornado crossed into Williamson County. Peak winds for the Jackson County portion of this tornado were estimated at 80 mph.
A report was submitted via mPING of flooding in Carbondale. Hourly rainfall rates peaked at a radar estimated 1 to 1.75 inches within an hour in the Carbondale area between 1340-1440CST with MRMS unit flow values peaking around 1430CST.
An EF-1 tornado entered into Williamson County from Jackson County at S. County Line Rd. Damage was primarily to tree limbs along a path continuing eastward. A large tree was uprooted on Skyhawk Road. Moving east, a barn suffered roof damage on New Hope Road. The tornado lifted after crossing Spillway Road on the southwest side of Crab Orchard National Wildlife Refuge. Video of this tornado was shared on social media. Peak winds for the Williamson County portion of this tornado, and for the tornado as a whole, were estimated at 90 mph.
Thunderstorm winds blew a narrow tree down onto a house in Vergennes.
Golf ball size hail was reported in Carterville from a supercell storm moving eastward across Williamson County. As this cell continued eastward, nickel size hail was reported in Marion by emergency management.
Hail measured to quarter size was reported on the north end of a supercell storm ENE of Colp.
Thunderstorm winds blew down trees southeast of Marion as a storm cell moved through. Tree damage occurred on Remington Rd, and near the intersection of Old Creal Springs Rd and Ellis Rd.
Multiple reports of water over roads came in from the Marion area. Three hour rainfall totals were a radar estimated 1.5-2 inches.
Flash flooding occurred on roads in Christopher. Radar estimates were 1-1.5 inches of rain over Christopher between 1430-1515CST which brought the 6 hour rainfall total up to 1.5-2.5 inches.
A broad area of straight-line wind damage, primarily from the rear-flank downdraft of a supercell storm, occurred south of Carrier Mills. Tree branch damage occurred on US Hwy 45 and Tuller Rd while more significant tree damage occurred on Pankey Rd and Taborn Rd with uprooted trees. A large span chicken house collapsed on Walnut Grove Rd.
An EF-0 tornado did intermittent damage from the central subdivisions of the Lake of Egypt community to just south of Creal Springs in Williamson County, IL. The great majority of the damage was from downed tree limbs. A couple trees in waterlogged soil were also uprooted. Peak winds from this tornado were estimated at 80 mph.
An EF-1 tornado formed southeast of Carrier Mills with tree damage north of Walnut Grove Rd. The tornado tracked east-southeastward. Several dozen trees were snapped or uprooted along with many large branches broken along the path. A few homes and barns with minor roof damage. One home was slightly shifted off its foundation on Walnut Grove Rd. The heaviest concentration of tree damage was on Willow Grove Rd. Damage became more sparse as the tornado crossed fields east of Hwy 145, with tree damage visible on the South Fork Saline River. Additional tree damage occurred in Somerset, with the tornado lifting at Shawnee Rd. Peak winds with this tornado were estimated at 95 mph. Many locations experienced straight-line wind damage north and south of the track from inflow regions of the supercell.
Straight-line wind damage on the north end of a tornado track was found along Blue Hole Rd, Feazel Rd, Butler Rd, and Willow Grove Rd. Tree damage generally fell towards the south or southeast. The most significant damage was an uprooted tree which fell onto a house.
An Eagle Coal metal structure collapsed as a result of rear flank downdraft winds just south of a tornado track.
Ping pong ball size hail was reported in Harrisburg from a supercell storm.
Straight-line thunderstorm winds to the south of a tornado track blew down a barn off of Williams Rd.
An mPING report was made for flooding on IL 1 north of Cave-in-Rock. with a public call reporting water flowing across roads near Cave-in-Rock. Radar estimated rainfall totals for the afternoon of the 8th were 1.5-2.5 inches for Cave-in-Rock and a peak of 2.5-3.5 inches further north in the county, most of which fell between 1445-1600CST.
Significant flash flooding occurred in Harrisburg. Several roads flooded with cars stuck in water. Most of the softball field flooded. Torrential rainfall rates produced radar estimated 1.5-2 inches of rain in Harrisburg, with most of the rain occurring between 1515-1615CST. Flash flooding transitioned to a flood event through the evening.
Tree limb damage was reported via mPING north of Equality as a storm progressed east-northeastward through Gallatin County.
Significant flash flooding occurred in Eldorado. Ferrell Hospital sustained floodwater damage with 55,000 sq ft of the hospital affected, requiring transfer of patients to other facilities. Flooding on roads leading to the hospital hindered emergency crews. Several streets around the city flooded, and water intruded into the Eldorado High School entrance. Torrential rainfall rates produced radar estimated 1.5-2 inches of rain in Eldorado, with most of the rain occurring between 1515-1615CST. Flash flooding transitioned to a flood event through the evening.
Water over the road near Simpson.
Quarter size hail was reported via mPING west of Pinckneyville as a line of storms moved eastward through Perry County.
Public reports were submitted via mPING of tree limb and/or power line damage in northern portions of Jefferson County as a storm line moved through.
A storm line moving eastward across Mount Vernon brought down trees and power lines, resulting in power outages. A public report was made of a 70 mph measured wind gust in Mount Vernon.
A swath of straight line winds of 75 to 85 mph began about 6 miles northwest of Johnsonville, IL and extended east northeast into the town of Rinard. Most of the damage in this swath included uprooted trees, as well as trees or large tree branches snapped. There were some homes that were damaged due to trees falling on them. Several power lines and poles were also broken because of fallen trees. A localized downburst occurred within this area of straight line winds on the south end of Brush Creek Campground, just west northwest of Sam Dale Lake. Winds of around 100 mph caused a small swath of several dozen snapped pine trees. A few buildings on the campground were also damaged. The wind damage swath is estimated at 11.5 miles in length and 1.7 miles in width. Additional wind damage was also reported in other parts of the county with this line of storms, but it was much more sporadic.
A large tree and power lines were downed by bow echo winds on IL 16 west of U.S. 45. On the east side of Cisne, a 67 mph wind gust was measured from a private anemometer.
Trees and power lines were downed over a road in Jeffersonville as a thunderstorm line moved eastward across Wayne County.
As a thunderstorm progressed eastward through the city, a public report of 1 inch hail was made in Harrisburg. A trained spotter reported golf ball size hail further south in Harrisburg.
The afternoon flash flood event in Harrisburg transitioned to an extended period of flooding impacts as remaining standing water was slow to recede, bolstered by off and on evening rainfall.
Flash flooding transitioned to lingering standing water flooding in Eldorado for the evening hours, with off and on showers hindering floodwater recession.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2024Every state in 2024This day in weather historyThe tornado archive for Illinois, 2024Warnings in Illinois, May 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: 1182203, 1182948, 1182944, 1182947, 1182946, 1182949, 1184496, 1182954, 1188551, 1182956, 1182961, 1182970, 1184515, 1184499, 1183236, 1182976, 1183191, 1183197, 1182987, 1182977, 1183199, 1184501, 1184532, 1182980, 1184538, 1184518, 1183240, 1183244, 1183241, 1183326, 1183303, 1183284, 1183269, 1184531, 1184539.