NWUS53 KLOT 180921 LSRLOT Preliminary Local Storm Report...Summary National Weather Service Chicago IL 421 AM CDT Sat Apr 18 2026 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0438 PM Hail 2 NNW Pecatonica 42.34N 89.37W 04/17/2026 E2.00 Inch Winnebago IL Public Photo shows hail estimated as approximately 2 inches in diameter near Pecatonica. Location estimated, relayed by broadcast media. Time estimated by radar. 0440 PM Tornado 3 N Pecatonica 42.35N 89.36W 04/17/2026 Winnebago IL Public Video shows possible brief tornado north of Pecatonica. No known damage. Relayed via social media. 0441 PM Hail 2 SW Durand 42.42N 89.36W 04/17/2026 M1.25 Inch Winnebago IL Public Report from mPING: Half Dollar (1.25 in.). 0441 PM Hail 2 NE Lake Summerset 42.48N 89.38W 04/17/2026 M2.25 Inch Winnebago IL Public Time estimated by radar. Relayed via mping. 0443 PM Hail 1 S Durand 42.42N 89.33W 04/17/2026 E1.75 Inch Winnebago IL Public Hail of at least golf ball size ongoing on south side of Durand. 0444 PM Hail 1 SE Durand 42.42N 89.32W 04/17/2026 E2.25 Inch Winnebago IL Public Hen egg size hail south of Durand. Relayed via mping. 0448 PM Hail 4 NE Durand 42.48N 89.28W 04/17/2026 E1.75 Inch Winnebago IL Public Relayed via mping. Time estimated by radar. 0459 PM Tornado 3 SSE Shirland 42.41N 89.18W 04/17/2026 Winnebago IL Trained Spotter Trained spotter reports tornado on the ground just southeast of Harrison. 0502 PM Tstm Wnd Dmg 3 SSE Shirland 42.40N 89.16W 04/17/2026 Winnebago IL Trained Spotter Trained spotter reports damage to a structure near Bates Road and Favor Road southeast of Harrison. Possible tornado. Time estimated by radar. 0504 PM Tornado 3 ESE Shirland 42.42N 89.14W 04/17/2026 Winnebago IL Storm Chaser Multiple photos and videos shared via social media show tornado on the ground between Harrison and Rockton. 0506 PM Hail 3 W Rockton 42.46N 89.12W 04/17/2026 M1.00 Inch Winnebago IL Public Relayed via mping. 0509 PM Tstm Wnd Dmg 3 SW Rockton 42.43N 89.12W 04/17/2026 Winnebago IL Storm Chaser Damage to trees and a structure observed along Owen Center Road southwest of Rockton. Possible tornado. Time estimated by radar. 0510 PM Hail South Beloit 42.49N 89.04W 04/17/2026 E0.50 Inch Winnebago IL Public Report from mPING: Half-inch (0.50 in.). 0514 PM Hail South Beloit 42.49N 89.04W 04/17/2026 M1.50 Inch Winnebago IL Public Relayed via mping. Time estimated by radar. 0515 PM Hail 3 E South Beloit 42.49N 88.99W 04/17/2026 E0.75 Inch Winnebago IL Public Report from mPING: Dime (0.75 in.). 0516 PM Hail South Beloit 42.49N 89.04W 04/17/2026 E1.25 Inch Winnebago IL Public Report from mPING: Half Dollar (1.25 in.). 0520 PM Hail South Beloit 42.49N 89.04W 04/17/2026 E1.50 Inch Winnebago IL Public Report from mPING: Ping Pong Ball (1.50 in.). 0709 PM Tstm Wnd Dmg 2 W Roscoe 42.41N 89.05W 04/17/2026 Winnebago IL Public Multiple structures with roof damage near Roscoe Road and Leena Drive in Roscoe. Possible tornado. Time estimated by radar. 0713 PM Tstm Wnd Dmg Roscoe 42.41N 89.01W 04/17/2026 Winnebago IL Amateur Radio Several large trees damaged south west of Belvidere Road and Main Street in Roscoe. Relayed by amateur radio. Time estimated by radar. Possible tornado. 0713 PM Tstm Wnd Dmg 1 S Roscoe 42.40N 89.01W 04/17/2026 Winnebago IL Public Photo shows multiple large branches broken and blocking a roadway near McDonald Road and Double Ditch Circle in Roscoe. Relayed by social media. Possible tornado. Time estimated by radar. 0715 PM Tornado 2 ESE Roscoe 42.40N 88.98W 04/17/2026 Winnebago IL Amateur Radio Tornado on the ground visible from IL-173 and Belvidere Road looking north. Relayed by amateur radio. 0733 PM Funnel Cloud 1 E Capron 42.40N 88.72W 04/17/2026 Boone IL Emergency Mngr McHenry County EM reports funnel cloud near Capron. 0749 PM Tstm Wnd Gst 4 WSW Hebron 42.46N 88.52W 04/17/2026 M63 MPH McHenry IL Amateur Radio 63 mph gust near Alden Road and IL-173. Relayed via amateur radio. Time estimated by radar. 0754 PM Tstm Wnd Gst Rockford Airport 42.20N 89.10W 04/17/2026 M62 MPH Winnebago IL ASOS Rockford ASOS KRFD gusted 62 mph. 0809 PM Tstm Wnd Gst 4 S Garden Prairie 42.20N 88.73W 04/17/2026 M61 MPH Boone IL Public Private weather station KILGARDE2 recorded 61 mph gust. 0810 PM Tstm Wnd Gst 5 ENE Herbert 42.18N 88.69W 04/17/2026 M76 MPH McHenry IL Dept of Highways IL DOT station on Harmony Road west of Riley recorded 76 mph wind gust. 0814 PM Rain 2 SW Timberlane 42.32N 88.89W 04/17/2026 M1.81 Inch Boone IL Public Private weather station KILILLIN2 recorded 1.81 inches since 7 PM. 0814 PM Rain 2 SSW Loves Park 42.29N 89.07W 04/17/2026 M2.31 Inch Winnebago IL Public Private weather station KILROCKF241 recorded 2.31 inches of rain since 7 PM. 0818 PM Tstm Wnd Dmg 5 WNW Troy Grove 41.49N 89.17W 04/17/2026 La Salle IL Emergency Mngr A pole barn was severely damaged southwest of Mendota with large portions of siding removed and partial structural collapse. Time estimated using radar. 0825 PM Tstm Wnd Dmg 3 E Mendota 41.55N 89.06W 04/17/2026 La Salle IL NWS Employee Several semi trucks were overturned on I-39 east of Mendota. Time estimated using radar. 0830 PM Flood 5 WSW Hebron 42.46N 88.53W 04/17/2026 McHenry IL Emergency Mngr Standing water on IL-173 near Oak Grove Road near Alden. 0851 PM Tstm Wnd Dmg 2 NW Sandwich 41.67N 88.66W 04/17/2026 De Kalb IL Trained Spotter Corrects previous tstm wnd dmg report from 2 NW Sandwich. Report of a two foot diameter tree trunk down and blocking the southbound lane of Somonauk Rd just north of Pratt Rd in Sandwich. Time estimated by radar. 0913 PM Tstm Wnd Gst 4 NW Cornell 41.03N 88.79W 04/17/2026 M50 MPH Livingston IL Public A personal weather station recorded a 50 mph gust south of Streator. 0913 PM Tstm Wnd Gst 4 NW Cornell 41.03N 88.79W 04/17/2026 M50 MPH Livingston IL Public A personal weather station recorded a 50 mph gust south of Streator. 0916 PM Tstm Wnd Dmg 1 N Batavia 41.86N 88.31W 04/17/2026 Kane IL Emergency Mngr Top half of a tree down in the road at IL Rt. 31 and Fabian Pkwy in Batavia. Time estimated by radar. 0916 PM Tstm Wnd Dmg 1 E Geneva 41.89N 88.28W 04/17/2026 Kane IL Emergency Mngr Power lines reported down causing trees to catch fire at Kirk Rd and IL-38 in Geneva. Time estimated by radar. 0917 PM Tstm Wnd Gst 2 SSW Marseilles 41.30N 88.73W 04/17/2026 M66 MPH La Salle IL Public A personal weather station recorded a 66 mph gust south of Marseilles. 0920 PM Flood 2 S Harvard 42.39N 88.62W 04/17/2026 McHenry IL Trained Spotter Report of multiple locations with around six inches of flowing water across IL-23 south of Harvard. 0930 PM Tstm Wnd Dmg Gibson City 40.47N 88.38W 04/17/2026 Ford IL Broadcast Media Structure damage was reported around parts of Gibson City, including one business which had large portions of metal siding ripped off. Tree damage was also reported in town. Time estimated using radar. 0940 PM Flood Fox Lake 42.39N 88.18W 04/17/2026 Lake IL Emergency Mngr Lake County EMA reported flooding on Rollins Rd in Fox Lake. 0940 PM Flood 2 ENE Green Oaks 42.31N 87.88W 04/17/2026 Lake IL Emergency Mngr Lake County EMA reported flooding at US-41 and Buckley Rd in North Chicago. 0940 PM Flood 1 SE Third Lake 42.36N 88.00W 04/17/2026 Lake IL Emergency Mngr Lake County EMA reported flooding at US-45 and Washington St in Third Lake. 0942 PM Tstm Wnd Gst 3 S Bartlett 41.95N 88.17W 04/17/2026 M55 MPH DuPage IL Public 0949 PM Tstm Wnd Dmg Loda 40.52N 88.07W 04/17/2026 Iroquois IL Emergency Mngr Grain bins were destroyed in Loda. Exact location unknown. Time estimated using radar. 0949 PM Tstm Wnd Dmg 1 NNW Paxton 40.47N 88.10W 04/17/2026 Ford IL Emergency Mngr Report of an eight inch diameter tree branch broken off of a tree near the intersection of Oak St and American St in Paxton. Time estimated by radar. 0950 PM Tstm Wnd Gst 2 S Buckingham 41.02N 88.17W 04/17/2026 M65 MPH Kankakee IL Public A personal weather station recorded a 65 mph gust south of Buckingham. 0951 PM Tstm Wnd Dmg 1 WSW Buckley 40.59N 88.06W 04/17/2026 Iroquois IL Emergency Mngr Report of semi trucks blown over on I-57 near mile marker 270 southwest of Buckley. Time estimated using radar. 1006 PM Tstm Wnd Gst 4 SW Crescent City 40.73N 87.91W 04/17/2026 M61 MPH Iroquois IL Public A personal weather station recorded a 61 mph gust west of Watseka. 1008 PM Tstm Wnd Gst 1 W Northerly Island 41.86N 87.62W 04/17/2026 M62 MPH Cook IL Public A personal weather station recorded a 62 mph gust in the South Loops community area of Chicago. 1008 PM Tstm Wnd Gst Indian Head Park 41.77N 87.90W 04/17/2026 M65 MPH Cook IL Public 1009 PM Tstm Wnd Dmg Manteno 41.25N 87.84W 04/17/2026 Kankakee IL Emergency Mngr Reports of tree damage in the Manteno area. Time estimated using radar. 1010 PM Tstm Wnd Gst Watseka 40.77N 87.73W 04/17/2026 M73 MPH Iroquois IL Emergency Mngr Emergency manager recorded a 73 mph wind gust in Watseka. Time estimated using radar. 1011 PM Tstm Wnd Dmg Watseka 40.77N 87.73W 04/17/2026 Iroquois IL Emergency Mngr Emergency manager reported extensive tree damage in Watseka, particularly around the southeast side of town. Numerous uprooted trees and snapped tree trunks were noted. Time estimated using radar. 1012 PM Tstm Wnd Gst 3 NE Navy Pier 41.92N 87.57W 04/17/2026 M64 MPH LMZ741 IL C-Man Station The Harrison-Dever Crib recorded a 56 kt wind gust. 1015 PM Tstm Wnd Gst 2 SW Papineau 40.95N 87.75W 04/17/2026 M62 MPH Iroquois IL Public Measured at an Ambient PWS. 1015 PM Tstm Wnd Gst 1 ESE Watseka 40.77N 87.71W 04/17/2026 M72 MPH Iroquois IL Public Measured at PWS WATSE19. 1025 PM Tstm Wnd Dmg 3 NW Kentland 40.81N 87.49W 04/17/2026 Newton IN Fire Dept/Rescue Newton County EMS reported numerous power poles down south of CR 1300S from the IL-IN state line east to US-41 northwest of Kentland. Time estimated using radar. 1030 PM Tstm Wnd Gst 5 SSW Earl Park 40.62N 87.46W 04/17/2026 M54 MPH Benton IN Emergency Mngr Benton County EM recorded a 54 mph wind gust at IN Rt. 18 and CR 700 W west of Fowler. 1031 PM Tstm Wnd Gst 4 WNW Cedar Lake 41.39N 87.52W 04/17/2026 M68 MPH Lake IN Public Measured at an Ambient PWS. 1031 PM Tstm Wnd Gst 6 E Goodenow 41.39N 87.53W 04/17/2026 M68 MPH Will IL Public A personal weather station recorded a 68 mph gust south of Dyer just west of the IL-IN state line. 1045 PM Tstm Wnd Dmg 2 WNW Kentland 40.78N 87.49W 04/17/2026 Newton IN Emergency Mngr Numerous powerlines and poles were reported down south of 1300 South from US 41 to State Line Road. 1100 PM Flood 1 SSE Buffalo Grove 42.15N 87.96W 04/17/2026 Cook IL Other Federal The gauge on Buffalo Creek at Wheeling quickly rose into minor flood stage due to heavy rain. 1107 PM Tstm Wnd Gst 4 NNE Teft 41.25N 86.95W 04/17/2026 M58 MPH Porter IN Public Measured at an Ambient PWS. 1118 PM Marine Tstm Wind 3 NE Beverly Shores 41.72N 86.94W 04/17/2026 M47 MPH LMZ745 IN C-Man Station Measured at MCYI3. 1125 PM Flood 2 NNE Northbrook 42.15N 87.82W 04/17/2026 Cook IL Other Federal The gauge on the north branch of the Chicago River at Deerfield quickly rose into minor flood stage due to heavy rain. && $$