Overview
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An unseasonably warm and humid air mass fueled explosive thunderstorm development along a cold front during the late afternoon of April 7th. Thunderstorms initially developed over southern Wisconsin during the afternoon then slowly moved south into northern Illinois. The storms were prolific hail producers, with particularly large hail in the Rockford area as well as across some of the near northern Chicago suburbs. Numerous reports of hail 1" in diameter or larger were received with the most intense storms producing hail of 2 to 3 inches in diameter!
Additional information about the storms that hit eastern Iowa: |
 Radar-estimated hail swaths and largest hail reports across Iowa, Wisconsin, and Illinois, during the evening hours of April 7, 2020. |
Photos & Video:
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| Large hail in Evanston, IL from Mark Caro |
Large hail in Evanston, IL from Rick DiMaio |
Large Hail near Rockford, IL from Lou Bauscher |
Large hail near Sycamore Illinois from a Nate Knorrek |
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| Large hail near Valparaiso, IN from Mark Meyer |
Large hail near Valparaiso, IN from Mark Meyer |
Large hail in Skokie, IL from Jasar Zvizdic |
Storm Reports
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PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO IL
1210 AM CDT WED APR 8 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0935 PM HAIL 2 NNE VALPARAISO 41.50N 87.05W
04/07/2020 U0.88 INCH PORTER IN TRAINED SPOTTER
CORRECTS PREVIOUS HAIL REPORT FROM 2 NNE
VALPARAISO. NUMEROUS REPORTS OF HAIL BETWEEN
NICKEL AND QUARTER SIZE IN NORTH SECTIONS OF
VALPARAISO.
0935 PM FLOOD VALPARAISO 41.47N 87.06W
04/07/2020 PORTER IN TRAINED SPOTTER
SPOTTER REPORTED 1 HAIL, 50 MPH WINDS, AND
MINOR FLOODING OF LOW-LYING AREAS.
0935 PM HAIL 1 W VALPARAISO 41.47N 87.07W
04/07/2020 E1.50 INCH PORTER IN PUBLIC
RELAYED VIA SOCIAL MEDIA AND TIME ESTIMATED
BY RADAR.
0907 PM HAIL PORTAGE 41.58N 87.18W
04/07/2020 M1.50 INCH PORTER IN TRAINED SPOTTER
TIME ESTIMATED VIA RADAR.
0905 PM HAIL 1 NNW PORTAGE 41.58N 87.18W
04/07/2020 U1.25 INCH PORTER IN TRAINED SPOTTER
TIME ESTIMATED VIA RADAR.
0903 PM HAIL 1 NW PORTAGE 41.58N 87.18W
04/07/2020 M1.00 INCH PORTER IN TRAINED SPOTTER
0515 AM HEAVY RAIN 7 SE CHESTERTON 41.55N 86.95W
04/07/2020 M1.19 INCH PORTER IN PUBLIC
PRECIPITATION SINCE MIDNIGHT 4/7. WUNDERMAP
STATION ID LOMWESTV9.
0514 AM HEAVY RAIN PORTAGE 41.57N 87.17W
04/07/2020 M1.04 INCH PORTER IN PUBLIC
PRECIPITATION SINCE MIDNIGHT 4/7. WUNDERMAP
STATION ID KINPORTA46.
0514 AM HEAVY RAIN 4 NNE VALPARAISO 41.53N 87.03W
04/07/2020 M1.39 INCH PORTER IN PUBLIC
PRECIPITATION SINCE MIDNIGHT 4/7. WUNDERMAP
STATION ID KINVALPA65.
0935 PM HAIL 1 SW HIGHLAND 41.54N 87.48W
04/07/2020 U1.00 INCH LAKE IN PUBLIC
PUBLIC REPORT SENT VIA MPING.
0830 PM HAIL HOBART 41.54N 87.26W
04/07/2020 U1.00 INCH LAKE IN TRAINED SPOTTER
TIME ESTIMATED VIA RADAR.
0513 AM HEAVY RAIN 1 SW MUNSTER 41.53N 87.52W
04/07/2020 M1.60 INCH LAKE IN PUBLIC
PRECIPITATION SINCE MIDNIGHT 4/7. WUNDERMAP
STATION ID KINMUNST9.
0513 AM HEAVY RAIN 1 NNE HOBART 41.54N 87.25W
04/07/2020 M1.78 INCH LAKE IN PUBLIC
PRECIPITATION SINCE MIDNIGHT 4/7. WUNDERMAP
STATION ID KINHOBART18.
0512 AM HEAVY RAIN 1 NNE GRIFFITH 41.55N 87.42W
04/07/2020 M1.35 INCH LAKE IN PUBLIC
PRECIPITATION SINCE MIDNIGHT 4/7. WUNDERMAP
STATION ID KINHIGHL12.
0728 PM HAIL 2 E NEW MILFORD 42.18N 89.02W
04/07/2020 U2.00 INCH WINNEBAGO IL PUBLIC
PUBLIC REPORT OF 2 IN HAIL ALONG I-39 NEAR
NEW MILFORD.
0728 PM HAIL 3 NNE NEW MILFORD 42.22N 89.03W
04/07/2020 E1.50 INCH WINNEBAGO IL PUBLIC
PICTURE SHARED VIA SOCIAL MEDIA OF HAIL
LARGER THAN QUARTER SIZE NEAR LINDEN RD AND
35TH STREET. TIME ESTIMATED VIA RADAR.
0726 PM HAIL ROCKFORD AIRPORT 42.20N 89.10W
04/07/2020 M1.25 INCH WINNEBAGO IL TRAINED SPOTTER
0724 PM HAIL 2 N ROCKFORD AIRPORT 42.23N 89.09W
04/07/2020 E1.00 INCH WINNEBAGO IL PUBLIC
0721 PM HAIL 2 NNE NEW MILFORD 42.20N 89.05W
04/07/2020 M1.75 INCH WINNEBAGO IL TRAINED SPOTTER
0719 PM HAIL 3 NNW CHERRY VALLEY 42.28N 88.97W
04/07/2020 M1.00 INCH WINNEBAGO IL TRAINED SPOTTER
0717 PM HAIL 3 SE WINNEBAGO 42.24N 89.20W
04/07/2020 M2.00 INCH WINNEBAGO IL PUBLIC
PICTURE SHARED ON SOCIAL MEDIA OF 2 IN HAIL
SOUTHEAST OF WINNEBAGO.
0715 PM HAIL WINNEBAGO 42.27N 89.24W
04/07/2020 E3.00 INCH WINNEBAGO IL TRAINED SPOTTER
DAMAGE TO SIDING AND CARS FROM HAIL. LARGEST
WERE APPROXIMATELY 3 INCHES IN DIAMETER.
0715 PM HAIL 2 NNW ROCKFORD 42.30N 89.11W
04/07/2020 M1.00 INCH WINNEBAGO IL TRAINED SPOTTER
0712 PM HAIL MACHESNEY PARK 42.35N 89.04W
04/07/2020 M1.00 INCH WINNEBAGO IL TRAINED SPOTTER
0710 PM HAIL WINNEBAGO 42.27N 89.24W
04/07/2020 M2.00 INCH WINNEBAGO IL TRAINED SPOTTER
0710 PM HAIL 2 SE LOVES PARK 42.29N 89.03W
04/07/2020 U1.75 INCH WINNEBAGO IL PUBLIC
PUBLIC REPORT VIA MPING.
0709 PM HAIL PECATONICA 42.31N 89.36W
04/07/2020 M1.00 INCH WINNEBAGO IL BROADCAST MEDIA
0707 PM HAIL 2 NE MACHESNEY PARK 42.37N 89.01W
04/07/2020 U1.50 INCH WINNEBAGO IL PUBLIC
PUBLIC REPORT VIA MPING.
0640 PM HAIL DURAND 42.43N 89.33W
04/07/2020 E1.75 INCH WINNEBAGO IL PUBLIC
MULTIPLE PICTURES SHARED VIA SOCIAL MEDIA OF
HAIL UP TO GOLF BALL SIZE NEAR LAKE
SUMMERSET AND DURAND. TIME ESTIMATED BY
RADAR.
0120 AM HAIL ROCKDALE 41.50N 88.11W
04/07/2020 E0.70 INCH WILL IL PUBLIC
TIME ESTIMATED BY RADAR.
1226 AM HAIL 3 SW ROCKDALE 41.48N 88.16W
04/07/2020 E0.25 INCH WILL IL EMERGENCY MNGR
0712 PM HAIL WOODSTOCK 42.32N 88.45W
04/07/2020 M1.00 INCH MCHENRY IL TRAINED SPOTTER
0659 PM HAIL 4 NE MARENGO 42.30N 88.55W
04/07/2020 U1.00 INCH MCHENRY IL PUBLIC
PUBLIC REPORT VIA MPING.
0847 PM HAIL 3 S BURLINGTON 42.00N 88.55W
04/07/2020 M1.00 INCH KANE IL EMERGENCY MNGR
TIME ESTIMATED VIA RADAR.
0915 PM HAIL WEST CHICAGO 41.88N 88.21W
04/07/2020 U1.00 INCH DUPAGE IL PUBLIC
PUBLIC REPORT VIA MPING.
0820 PM HAIL 1 S DOWNERS GROVE 41.78N 88.01W
04/07/2020 E0.88 INCH DUPAGE IL PUBLIC
PHOTOS SHARED VIA SOCIAL MEDIA OF HAIL
BETWEEN DIME AND QUARTER SIZE IN DOWNERS
GROVE.
0820 PM HAIL DARIEN 41.75N 87.98W
04/07/2020 U1.00 INCH DUPAGE IL PUBLIC
TIME ESTIMATED VIA RADAR.
0843 PM HAIL 1 WSW SYCAMORE 41.98N 88.71W
04/07/2020 U1.75 INCH DE KALB IL TRAINED SPOTTER
NEAR PEACE ROAD AND IL-23.
0802 PM HAIL 2 SSE GENOA 42.07N 88.68W
04/07/2020 M1.00 INCH DE KALB IL TRAINED SPOTTER
0800 PM HAIL 2 S GENOA 42.07N 88.68W
04/07/2020 U1.00 INCH DE KALB IL PUBLIC
MULTIPLE PUBLIC REPORTS OF 1 IN DIAMETER
HAIL JUST SOUTH OF GENOA.
0832 PM HAIL 1 NNE EVANSTON 42.06N 87.69W
04/07/2020 U1.50 INCH COOK IL BROADCAST MEDIA
NUMEROUS ADDITIONAL PUBLIC REPORTS OF HAIL
LARGER THAN QUARTER SIZE IN VICINITY. TIME
ESTIMATED VIA RADAR.
0832 PM HAIL EVANSTON 42.05N 87.68W
04/07/2020 M1.75 INCH COOK IL PUBLIC
NUMEROUS PICTURES SHARED VIA SOCIAL MEDIA OF
HAIL UP TO GOLF BALL SIZE IN EVANSTON. TIME
ESTIMATED BY RADAR.
0832 PM HAIL 1 NE EVANSTON 42.05N 87.68W
04/07/2020 M2.75 INCH COOK IL PUBLIC
MULTIPLE PHOTOS SHARED VIA SOCIAL MEDIA OF
HAIL UP TO BASEBALL SIZE IN EVANSTON.
DELAYED REPORT, TIME ESTIMATED VIA RADAR.
0828 PM HAIL 1 NW SKOKIE 42.04N 87.75W
04/07/2020 U1.00 INCH COOK IL PUBLIC
PUBLIC REPORT VIA MPING.
0827 PM HAIL 1 E WILMETTE 42.08N 87.71W
04/07/2020 M1.50 INCH COOK IL EMERGENCY MNGR
TIME ESTIMATED BY RADAR.
0825 PM HAIL 1 ESE GLENVIEW 42.08N 87.80W
04/07/2020 M1.00 INCH COOK IL TRAINED SPOTTER
0822 PM HAIL 3 SW MIDWAY AIRPORT 41.74N 87.78W
04/07/2020 M1.00 INCH COOK IL CO-OP OBSERVER
GUSTS UP TO 40 MPH.
0812 PM HAIL GLENCOE 42.13N 87.76W
04/07/2020 E0.88 INCH COOK IL TRAINED SPOTTER
TRAINED SPOTTER ESTIMATES HAIL OF 0.88-1.00
IN DIAMETER. TIME ESTIMATED BY RADAR.
0515 AM HEAVY RAIN 1 NNW FLOSSMOOR 41.55N 87.69W
04/07/2020 M0.98 INCH COOK IL PUBLIC
PRECIPITATION SINCE MIDNIGHT 4/7. WUNDERMAP
STATION ID KINHIGHL12.
0515 AM HEAVY RAIN 1 ESE GLENWOOD 41.54N 87.59W
04/07/2020 M1.59 INCH COOK IL PUBLIC
TOTAL RAINFALL SINCE MIDNIGHT. STATION ID
KILGLENW1.
0737 PM HAIL BELVIDERE 42.26N 88.84W
04/07/2020 M1.00 INCH BOONE IL TRAINED SPOTTER
0725 PM HAIL TIMBERLANE 42.33N 88.86W
04/07/2020 M1.25 INCH BOONE IL TRAINED SPOTTER
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Rain Reports
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| Rainfall |
Maximum/Minimum Temperature and Precipitation Table
National Weather Service Chicago/Romeoville IL
1004 AM CDT Wed Apr 8 2020
High temperature yesterday
Low temperature last 12 hours
Precipitation last 24 hours
Snowfall last 24 hours
.BR LOT 0408 C DH01/TAIRZX/DH07/TAIRZP/PPDRZZ/SFDRZZ
:ID Location High Low Pcpn Snowfall
ORD: Chicago-O`Hare : 80 / 51 / 0.01 / 0.0
CNII2: Chicago-Northerly Isl : 78 / 45 /
MDW: Chicago-Midway : 80 / 50 / 0.31
LOTI2: NWS Chicago-Romeoville : 79 / 52 / 0.00 / 0.0
RFD: Rockford Airport : 78 / 45 / 0.10 / 0.0
DPA: DuPage Airport : 80 / 50 / 0.08
UGN: Waukegan Airport : 79 / 43 / T
ARR: Aurora/Sugar Grove : 79 / 49 / 0.00
PWK: Wheeling/CHI Exec : 80 / 48 / 0.08
VPZ: Valparaiso IN : 79 / 50 / 0.14
:
:Unofficial Supplemental AWOS Locations
:
DKB: DeKalb : M / 50 /
JOT: Joliet : 81 / 53 /
IKK: Kankakee : 80 / 51 /
IGQ: Lansing : 78 / 49 /
VYS: Peru : 81 / 50 /
PNT: Pontiac : 82 / 51 /
RZL: Rensselaer IN : 79 / 50 /
RPJ: Rochelle : 78 / 44 /
06C: Schaumburg : M / 48 /
:
:Additional Supplemental Automated Locations
:
SBNI2: Shabbona 5NNE : 79 / 45 /
WMGI2: Wilmington-Midewin : 82 / 52 /
.END
The following data provided by National Weather Service cooperative
observers. 24 hr temperatures and precipitation ending at indicated
time this morning. Locations are grouped by climatic division.
.BR LOT 0408 C DH07/TAIRZX/TAIRZN/PPDRZZ/SFDRZZ/SDIRZZ
: Snow Snow
:Location Date/Time Max Min Pcpn Fall Depth
:Northeast Illinois...
ARRI2: Aurora : DH0700/ 80 / 52 / 0.00 / 0.0/ 0
BARI2: Barrington 3SW : DH0800/ 78 / 47 / 0.03 / 0.0/ 0
DEKI2: DeKalb : DH0700/ 78 / 53 / 0.01 / 0.0/ 0
ELGI2: Elgin : DH0700/ 78 / 50 / 0.02 / 0.0/ 0
GEOI2: Genoa : DH0600/ / / 0.28 / 0.0/ 0
JOLI2: Joliet Lock/Dam: DH0600/ 79 / 51 / 0.00 / 0.0/ 0
WHTI2: Lisle Mortn Arb: DH0700/ 79 / 49 / 0.02 / 0.0/ 0
MATI2: Manhattan 5NE : DH0800/ / / 0.00 / 0.0/ 0
MDTI2: Mendota : DH0600/ / / 0.00 / 0.0/ 0
MHYI2: McHenry : DH0800/ 82 / 46 / 0.20 / 0.0/ 0
MFWI2: Midway Coop : DH0700/ 80 / 50 / 0.51 / 0.0/ 0
MMOI2: Marseilles : DH0600/ 66 / / 0.00 / 0.0/ 0
MOSI2: Morris : DH0800/ 81 / 53 / 0.00 / 0.0/ 0
MUNI2: Mundelein : DH0700/ 78 / 45 / T / 0.0/ 0
OTTI2: Ottawa 4SW : DH0746/ 79 / 51 / 0.00 / 0.0/ 0
PKFI2: Park Forest : DH0500/ 79 / 50 / 0.04 / 0.0/ 0
PEOI2: Peotone : DH0700/ / / 0.00 / 0.0/ 0
STAI2: Streator : DH0700/ 77 / 55 / 0.00 / 0.0/ 0
WODI2: Woodstock 5NW : DH0700/ / / 0.08 / 0.0/ 0
: Snow Snow
:Location Date/Time Max Min Pcpn Fall Depth
:Northwest Illinois...
PAWI2: Paw Paw : DH0700/ 78 / 48 / 0.00 / 0.0/ 0
RSCI2: Roscoe : DH0630/ / / 0.45 / 0.0/ 0
STWI2: Steward : DH0700/ / / 0.00 / 0.0/ 0
: Snow Snow
:Location Date/Time Max Min Pcpn Fall Depth
:Northwest Indiana...
CRPI3: Crown Point : DH0630/ / / 0.12 / T/ 0
RZZI3: Rensselaer : DH0730/ 80 / / 0.00 / 0.0/ 0
: Snow Snow
:Location Date/Time Max Min Pcpn Fall Depth
:Eastern Illinois...
BOUI2: Bourbonnais : DH0700/ / / 0.00 / 0.0/ 0
CHTI2: Chatsworth : DH0700/ / / 0.00 / 0.0/ 0
CWWI2: Dwight : DH0700/ 80 / 50 / 0.00 / 0.0/ 0
KKEI2: Kankakee : DH0700/ 80 / 51 / 0.00 / 0.0/ 0
PXNI2: Paxton : DH0630/ 80 / 50 / 0.00 / 0.0/ 0
SAAI2: St Anne : DH0700/ / / 0.00 / 0.0/ 0
WATI2: Watseka : DH0700/ 80 / 54 / 0.00 / 0.0/ 0
.END
Other Additional Supplementary Reports
Snow Snow
:Location Date/Time Max Min Pcpn Fall Depth
BATI2: Batavia : DH0600/ 80 / 52 / T / 0.0/ 0
CTYI2: Coal City 4NNW : DH0700/ 82 / 53 / T / 0.0/ 0
EGNI2: Elgin : DH0800/ / / 0.05 / 0.0/ 0
HEBI2: Hebron : DH0700/ / / 0.01 / 0.0/ 0
LKZI2: Lake Zurich : DH0700/ / / 0.05 / 0.0/ 0
WJWI2: Westmont : DH0700/ / / 0.15 / 0.0/ 0
Soil temperatures at 4 inch depth under bare soil
:Location Max Min
WATI2: Watseka : 56 / 47
:
Soil temperatures at 4 inch depth under sod
:Location Max Min
:
These data are preliminary and have not undergone final quality
control by the National Center for Environmental Information /NCEI/.
Therefore... these data are subject to revision. Final and certified
climate data can be accessed at www.ncei.noaa.gov.
Additional Info
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