Storm Reports
Preliminary Local Storm Report...SummaryNational Weather Service Lincoln IL1239 PM CDT Fri Apr 19 2024..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON.....DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS..0720 PM Tornado 1 WSW Latham 39.96N 89.17W04/18/2024 Logan IL NWS Storm Survey NWS storm damage survey confirmed an EF-0 tornado with estimated peak winds of 85 mph near Latham, IL. The damage path length is 1.11 miles and max width of 200 yds. It was on the ground for 2 minutes and did mostly tree damage. It also blew the roof off one business building in Latham.0722 PM Tornado 1 SE Latham 39.95N 89.15W04/18/2024 Logan IL NWS Storm Survey NWS storm survey damage survey confirmed an EF-1 tornado with estimated peak winds of 95 mph in southeast Logan and northwest Macon counties that moved southeast and then east through Warrensburg. The damage path length is 7.19 miles and max width of 300 yds. The tornado damaged several outbuildings and threw the debris to the southeast. The tornado was on the ground for 9 min and damaged several homes and numerous trees in Warrensburg and then dissipated east of town.0737 PM Tornado 3 NNW Forsyth 39.97N 88.97W04/18/2024 Macon IL NWS Storm Survey NWS storm damage survey confirmed an EF-1 tornado with estimated peak winds of 90 mph in Macon county 3 miles north-northwest of Forsyth. The damage path is 7 miles with a max width of 500 yds. The tornado was on the ground for 8 min and damaged trees, grain bins and power poles. The tornado traveled east and dissipated about 1 mile west of Argenta.0657 PM Tstm Wnd Dmg Riverton 39.85N 89.54W04/18/2024 Sangamon IL Emergency Mngr Numerous trees were blown down from Riverton eastward.0745 PM Tstm Wnd Dmg 2 NE Oreana 39.96N 88.85W04/18/2024 Macon IL Public Power poles tilted over on route 48 between Oreana and Argenta. Time estimated from radar.0747 PM Tstm Wnd Dmg 2 S Argenta 39.96N 88.82W04/18/2024 Macon IL Emergency Mngr Delayed report. Semi blown over on Interstate 72 at mile marker 150.0749 PM Tstm Wnd Dmg Argenta 39.98N 88.82W04/18/2024 Macon IL Broadcast Media Delayed report. Social media images show a destroyed grain bin and a damaged farm outbuilding.0749 PM Tstm Wnd Dmg Argenta 39.98N 88.82W04/18/2024 Macon IL Public Large tree snapped and numerous branches down. Pictures via social media. Time estimated from radar.0718 PM Tstm Wnd Dmg 2 ESE Mount Pulaski 39.99N 89.25W04/18/2024 Logan IL Emergency Mngr Three power poles are leaning near the intersection of Route 121 and 1842nd Avenue.0719 PM Tstm Wnd Dmg 3 WSW Latham 39.95N 89.22W04/18/2024 Logan IL Emergency Mngr Corrects previous tstm wnd dmg report from 3 WSW Latham. Several trees were down, but no structural damage was noted in this area. (Previous report was roof damage).0720 PM Tstm Wnd Dmg Latham 39.97N 89.16W04/18/2024 Logan IL Emergency Mngr A tree was blown down.0720 PM Tstm Wnd Dmg Latham 39.97N 89.16W04/18/2024 Logan IL Fire Dept/Rescue The roof of a home was severely damaged.0720 PM Tstm Wnd Dmg Latham 39.97N 89.16W04/18/2024 Logan IL Broadcast Media A semi was overturned on Route 121 near Latham. Possible injuries.0835 PM Tstm Wnd Dmg 3 S Sumner 38.67N 87.86W04/18/2024 Lawrence IL Emergency Mngr Several large trees down.0749 PM Tstm Wnd Dmg 3 S Dieterich 39.02N 88.38W04/18/2024 Effingham IL Broadcast Media Delayed report. Large tree blown over.0738 PM Tstm Wnd Dmg Clinton 40.15N 88.96W04/18/2024 De Witt IL Fire Dept/Rescue Numerous power lines were blown down.0753 PM Tstm Wnd Dmg 3 E Clinton 40.16N 88.91W04/18/2024 De Witt IL Public Delayed report. Garage roof blown off. Four utility poles and multiple trees blown down. Time estimated by radar.0840 PM Tstm Wnd Dmg 1 SW Champaign 40.10N 88.28W04/18/2024 Champaign IL Broadcast Media report of a power line down into a tree. KCMI gusted to 52 mph with storms.&&$$
Rain Reports
...24 HOUR PRECIPITATION REPORTS...Location Amount Provider...Illinois......Cass County...3 SE Bluff Springs 0.63 in COCORAHSBeardstown 0.61 in CWOP...Champaign County...4 N Fisher 1.02 in CocorahsChampaign 2.3 SSE 0.73 in COCORAHSMahomet 0.72 in COCORAHSMahomet 1.8 ENE 0.68 in COCORAHSUrbana 2.6 ENE 0.68 in COCORAHSMahomet 1.0 NW 0.67 in COCORAHSMahomet 1.6 E 0.63 in COCORAHSUrbana 1.9 ENE 0.63 in COCORAHSChampaign 2.2 SSE 0.62 in COCORAHSFisher 0.62 in COOP1 NE Rantoul 0.62 in COCORAHSChampaign 0.3 NNE 0.62 in COCORAHSChampaign 0.7 SW 0.61 in COCORAHSChampaign 2.4 SSE 0.61 in COCORAHSChampaign 0.3 ESE 0.60 in COCORAHSChampaign 0.6 NNE 0.59 in COCORAHSSidney 0.9 N 0.58 in COCORAHSChampaign 2.9 SSW 0.58 in COCORAHSUrbana 0.57 in COCORAHSUrbana 1.0 WSW 0.55 in COCORAHSUrbana 0.3 SE 0.55 in COCORAHSUrbana 2.2 SE 0.54 in COCORAHSPenfield 2.6 N 0.53 in COCORAHSMahomet 1.7 NNE 0.51 in COCORAHSBroadlands 0.1 SSW 0.49 in COCORAHSWillard Arpt 0.48 in ASOSChampaign 2.6 WNW 0.47 in COCORAHSUrbana 1.6 ESE 0.46 in COCORAHSRantoul Arpt 0.46 in AWOSUrbana 2.3 SSE 0.45 in COCORAHSHomer 2.0 N 0.36 in COCORAHSOgden 0.35 in COOPHomer 3.1 SW 0.35 in COCORAHSHomer 2.1 NNE 0.34 in COCORAHSPhilo 0.32 in COCORAHSSt. Joseph 1.1 ENE 0.24 in COCORAHS...Christian County...3 S Assumption 1.03 in CocorahsMORRISONVILLE 0.98 in CWOP2.5 W Taylorville 0.73 in COOPPana 6.2 NNE 0.23 in COCORAHSEdinburg 3.0 W 0.12 in COCORAHS...Clark County...Marshall 1.1 SSW 0.44 in COCORAHSCasey 0.30 in COOP...Clay County...Flora 0.74 in COOPClay City 6 SSE 0.71 in COOP...Coles County...Coles Co. Mem AP 0.96 in ASOSMattoon 0.5 NW 0.95 in COCORAHS...Crawford County...2.0 W Robinson 0.85 in COOP...Cumberland County...Neoga 0.80 in COOP...De Witt County...Waynesville 0.92 in CWOPFarmer City 1.5 SSW 0.82 in COCORAHSLane 0.79 in CWOPFarmer City 2.7 WSW 0.55 in COCORAHS...Douglas County...Newman 0.83 in COCORAHSCamargo 4.5 ESE 0.47 in COCORAHSArcola 0.32 in CWOPTuscola 0.28 in COOPTuscola 0.5 WSW 0.28 in COCORAHS...Edgar County...Kansas 3.7 SSE 0.48 in COCORAHSParis 0.28 in COOPEdgar Co. Arpt 0.23 in AWOS...Effingham County...Watson 0.50 in COCORAHSEffingham 1SE 0.49 in COOPTeutopolis 3.4 SE 0.47 in COCORAHSBeecher City 0.46 in COOP...Fulton County...Bryant 1.29 in CocorahsLewistown 1.17 in Cocorahs1 E Canton 1.02 in CocorahsAvon 0.97 in COOPFairview 2.0 SE 0.80 in COCORAHS...Jasper County...1.1 W Newton 0.70 in COOPNewton 0.69 in CWOPYale 0.1 SSW 0.37 in COCORAHS...Knox County...Knoxville 1.06 in CO-OP ObserverKnoxville 0.7 NW 0.96 in COCORAHSGalesburg 0.88 in COOPGalesburg 2.5 N 0.81 in COCORAHSYates City 0.80 in COOPDelong 0.79 in CWOPWilliamsfield 1.7 NNE 0.78 in COCORAHSAltona 4.7 ESE 0.74 in COCORAHSGalesburg Arpt 0.56 in AWOS...Lawrence County...Lawrenceville AP 0.94 in ASOS1 W Lawrenceville 0.72 in COCORAHS1.7 W Lawrenceville 0.72 in COOP...Logan County...1 NNE Logan County Airport 1.25 in CocorahsLincoln 1.15 in CocorahsMount Pulaski 1.05 in CO-OP Observer2 NW Chestnut 0.80 in COCORAHSElkhart 0.7 ENE 0.75 in COCORAHSHartsburg 3.2 E 0.41 in COCORAHSNew Holland 0.40 in COCORAHS...Macon County...Illiopolis 4.4 NNE 0.55 in COCORAHSWarrensburg 0.6 E 0.43 in COCORAHSDecatur Arpt 0.09 in ASOSDecatur 1 SSE 0.08 in COOP...Marshall County...Sparland 3.4 NNW 0.97 in COCORAHSHenry 1.4 SW 0.94 in COCORAHSHenry 0.88 in CWOPToluca 0.5 N 0.69 in COCORAHSLacon Arpt 0.67 in AWOS...Mason County...0.7 W Havana 0.47 in HADS...McLean County...3 NE Bellflower 1.15 in CocorahsArrowsmith 1.12 in CWOPLe Roy 0.7 ENE 0.92 in COCORAHSLe Roy 1.8 WSW 0.89 in COCORAHSCooksville 0.84 in CWOPBloomington 3.9 ESE 0.81 in COCORAHSHeyworth 0.6 E 0.75 in COCORAHSBloomington 0.69 in COOPBloomington 1.6 WSW 0.68 in COCORAHSBloomington 2.7 NE 0.61 in COCORAHSBloomington 3.7 NE 0.61 in COCORAHSBloomington Arpt 0.54 in AWOSCarlock 0.1 ESE 0.37 in COCORAHSTowanda 0.37 in CWOPBloomington 3.8 SW 0.35 in COCORAHS4 NE Normal 0.30 in COOPNormal 1.4 WNW 0.30 in COCORAHS...Menard County...Petersburg 1.3 N 0.88 in COCORAHSPetersburg 0.2 W 0.85 in COCORAHSPetersburg 6.5 SSE 0.60 in COCORAHSAthens 4 WSW 0.60 in COOP...Morgan County...Jacksonville Arpt 0.57 in AWOSJacksonville 1.2 SW 0.45 in COCORAHS1 NNE Jacksonville Airport 0.38 in COCORAHSJacksonville 2.6 SE 0.34 in COCORAHS2.0 E Jacksonville 0.33 in COOPJacksonville 0.31 in COOP...Moultrie County...Arthur 0.8 NNW 0.31 in COCORAHSLovington 0.24 in COOPLovington 4.1 NNW 0.13 in COCORAHS...Peoria County...Peoria Intl Arpt 1.02 in ASOSDunlap 2.6 NE 0.97 in COCORAHSDunlap 2.6 S 0.90 in COCORAHSPeoria Heights 0.83 in CWOPPeoria 5 NW 0.82 in COOP...Piatt County...White Heath 3.7 NNE 0.83 in COCORAHSMonticello 0.4 ENE 0.65 in COCORAHS2 S De Land 0.58 in COCORAHSCisco 2.1 NNE 0.51 in COCORAHSCisco 0.50 in COOPMansfield 3.2 NE 0.34 in COCORAHS4 NE Hammond 0.17 in COCORAHS4 N Cerro Gordo 0.16 in COCORAHS...Richland County...2 S Olney 1.51 in CO-OP ObserverOlney 1.5 NE 1.26 in COCORAHSOlney Noble AP 1.17 in AWOS...Sangamon County...Sherman 0.54 in COOPSpringfield 2.0 N 0.54 in COCORAHSSpringfield 4.4 W 0.51 in COCORAHSBuffalo 0.43 in COOP4 NNE Curran 0.33 in COCORAHSLake Springfield 0.32 in COOPSpringfield 6.3 S 0.28 in COCORAHS...Schuyler County...Rushville 4.1 NE 0.96 in COCORAHS0.6 NE Ripley 0.21 in COOP...Shelby County...2 E Shelbyville 1.40 in CO-OP Observer1 ENE Shelbyville 1.35 in CocorahsWindsor 0.55 in COOPMoweaqua 2 S 0.49 in COOP...Stark County...Toulon 0.5 ESE, IL 0.82 in COCORAHSPutnam 0.74 in CWOP...Tazewell County...Washington 1.7 NE 0.90 in COCORAHSMorton 0.64 in COOPMorton 0.53 in COCORAHS...Vermilion County...Georgetown 0.1 NNW 0.68 in COCORAHSHoopeston 0.6 E 0.52 in COCORAHSDanville 4.2 NW 0.47 in COCORAHS2.3 E Tilton 0.45 in COOPFithian 0.6 NNW 0.40 in COCORAHSDanville 0.38 in COCORAHSDanville 3.1 NNW 0.36 in COCORAHSDanville Arpt 0.33 in AWOSHenning 3.4 SE 0.32 in COCORAHSCollison 1.9 SE 0.31 in COCORAHSSidell 4N 0.30 in COOP...Woodford County...Metamora 6.4 W 0.90 in COCORAHSEureka 0.85 in CWOPEast Peoria 6.9 NNE 0.80 in COCORAHSGermantown Hills 0.70 in CWOPRoanoke 0.69 in COOPEl Paso 5.2 NNW 0.69 in COCORAHSEl Paso 0.6 WNW 0.65 in COCORAHSMetamora 1.1 WNW 0.60 in COCORAHSObservations are collected from a variety of sources with varyingequipment and exposures. We thank all volunteer weather observersfor their dedication. Not all data listed are considered official.
Environment
Surface analysis from the afternoon of April 18 showed a 1008 mb low centered near St. Louis with a warm front extending northeastward to Terre Haute, Indiana. Temperatures were in the upper 60s and lower 70s north of the front across much of central Illinois, but warmed into the upper 70s to lower 80s to the south. With southerly winds bringing moisture northward from the Gulf of Mexico, dewpoints climbed into the middle 60s across southeastern Missouri and southern Illinois, which resulted in Surface Based Convective Available Potential Energy (SBCAPE) values of 1500-2000 J/kg.
The primary forecast question for the afternoon and evening wasexactly how far north the warm front would lift before the low tracked across the area.NWS Lincoln conducted a special 21z (4pm) upper air balloon launch in order to better assess the evolving airmass (image linked below).Since Lincoln was just north of the main boundary during the balloon launch, the afternoon soundingrevealed only meager instability with SBCAPEs of less than 500 J/kg.However,steep lapse rates and surface-3 km shear values of 40 kt raised concern for rotation within any storms that developed this far north.Note surface winds from the southeast at 15 kt veering to the southwest and increasing to 40 kt at 3 km aloft.
By 6pm, a line of severe thunderstorms had developed from south of Springfield southwestward into the Saint Louis area.Numerous reports of damaging wind gusts in excess of 60mph, hail larger than golf balls, and even tornadoes were received.Meanwhile further northwest, additional thunderstorm cells formed along an advancing cold front just east of the Illinois River.
One of the northwestern cells quickly became severe as it tracked near the triple point just north of the low pressure center.This particular cell produced 60-70 mph winds and numerous reports of wind damage from eastern Sangamon County northeastward into northern Macon and southern DeWitt counties. As boundary layer vorticity was enhanced in the vicinity of several notches along the leading edge of the storm,3 tornado touchdownsoccurred.At 7:20 PMCDT, anEF-0tornado caused minor tree and structural damage in Latham in southeast Logan County.Shortly afterwards, anEF-1tornado developed southeast of Latham and crossed into Macon County where it damaged several homes in Warrensburg.AnotherEF-1tornado touched down at 7:37PM CDT 2 miles north of Forsyth in Macon County, then tracked eastward damaging trees, grain bins, and power poles before dissipating west of Argenta.
The tornado-producing thunderstorm weakened as it tracked further northeastward, producing minor wind damage near Champaign before dissipating further. Meanwhile the line of severe storms near Saint Louis swept eastward into the far southern portion of the NWS Lincoln County Warning Area (CWA), causing scattered wind damage south of I-70. The storms then exited into Indiana by mid-evening.
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| Apr 18 12Z (7 am) surface map | Apr 18 21Z (4 pm) surface map | Apr 19 00Z (7 pm Apr 18) surface map |
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| KILX Apr 18 21Z sounding | Apr 18 12Z Thunderstorm Outlook | Apr 18 12Z Tornado Outlook |
