Chicago, IL

Weather Forecast Office

Memorial Day Severe Weather: Five EF-0 Tornadoes Confirmed in Local Area

Overview

Memorial Day thunderstorms produced widespread large hail and wind damage across northern Illinois and northwest Indiana. There were five brief EF-0 tornadoes confirmed. See this Public Information Statement for the details.

In addition to the severe weather, heavy rainfall and flooding were reported in many locations. With the 1.92" of rain recorded at Chicago O'Hare, this set a daily record for precipitation for May 27th, as well as making it the wettest Memorial Day on record.

Preliminary Overview Map - Updated May 29

Tornadoes & Wind:

See this PUBLIC INFORMATION STATEMENT for a summary.

Tornado - Plattville, IL Area
KENDALL COUNTY

Date	5/27/2019
Time (Local)	1:47 - 1:48 PM CDT
EF Rating	EF-0
Est. Peak Winds	65 mph
Path Length	1 mile
Max Width	30 yards
Injuries/Deaths	0
Summary: A tornado briefly touched down near the intersection of Walker Road and Ashley Road. Video and photo show that the tornado kicked up dust in an open field with no damage reported.

Track Map

Tornado - Romeoville, IL
WILL COUNTY

Date	5/27/2019
Time (Local)	2:04 - 2:14 PM CDT
EF Rating	EF-0
Est. Peak Winds	85 mph
Path Length	3.3 miles
Max Width	300 yards
Injuries/Deaths	0
Summary: A tornado developed quickly in southwest Romeoville and moved east, tracking just north of Lewis University Airport. Damage was relatively minor, mostly consisting of light roof damage, leaning utility poles, and downed limbs. This supercell storm that produced this tornado also resulted in fairly widespread corridors of straight-line wind damage from Kendall County through southern Cook County. Some of these strongest winds were accompanied by large hail.

Track Map

Tornado - Paw Paw, IL Area
LEE COUNTY

Date	5/27/2019
Time (Local)	4:27 - 4:28 PM CDT
EF Rating	EF-0
Est. Peak Winds	65 mph
Path Length	0.7 miles
Max Width	30 yards
Injuries/Deaths	0
Summary: A brief tornado occurred based on trained spotter reports. This was just east of Interstate 39. Damage was not reported with this touchdown.

Track Map

Tornado - Sauk Village, IL
COOK COUNTY

Date	5/27/2019
Time (Local)	4:27 - 4:30 PM CDT
EF Rating	EF-0
Est. Peak Winds	85 mph
Path Length	0.8 miles
Max Width	50 yards
Injuries/Deaths	0
Summary: This tornado occurred just prior to the Dyer, Indiana tornado from the same supercell storm. The tornado was brief and produced only minor damage, including to roofs and a downed light pole onto a car.

Track Map

Tornado - Dyer, IN
LAKE COUNTY

Date	5/27/2019
Time (Local)	4:30 - 4:33 PM CDT
EF Rating	EF-0
Est. Peak Winds	85 mph
Path Length	1.1 miles
Max Width	100 yards
Injuries/Deaths	0
Summary: This tornado happened just after the Sauk Village, IL one with the same storm circulation recycling, and just happened to do so across the state line. This tornado caused damage in a subdivision to trim, shingles, siding, and fascia on several homes, as well as to a chimney on one home. Multiple trees were snapped and many lost limbs. The tornado also flipped a backyard shed and damaged fencing. The homes between Willow and Scotty Lanes appeared to sustain the worst damage.

Track Map

Straight-Line Wind Damage - Benton County, IN
LAKE COUNTY

Date	5/27/2019
Time (Local)	4:30 - 4:33 PM CDT
Est. Peak Winds	80 mph
Max Width	100 yards
Summary: Numerous farmsteads with wind damage, including a couple of outbuildings destroyed. Damage was primarily dispersed in a unidirectional, or fanning out orientation.

Track Map

Thank you to Emergency Management, law enforcement, trained storm spotters, and academic partners for their help in assisting with the damage assessment.

The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:

EF0 Weak 65-85 mph	EF1 Moderate 86-110 mph	EF2 Significant 111-135 mph	EF3 Severe 136-165 mph	EF4 Extreme 166-200 mph	EF5 Catastrophic 200+ mph

Hail:


Photo by Cat Barr Schuyler Aurora, IL	Photo by William Bell Oswego, IL	Photo by Jason Fisher Fowler, IN	Photo by Alex Pipkalejs Romeoville, IL

Flooding:


Photo by Dolph Zielinski Elmhurst, IL	Photo by Tim North Aurora, IL	Photo by Bill Alstrom Wheatland Township, IL

Photos & Video


Plattville, IL (intersection of Ashley and Walker)	Yorkville, IL (Ben Smith)	Valparaiso, IN (Stacia Meiss)


Walnut, IL (Sandra Mallery-Davis)	St. John, IN (Ellen Hanneman )

Radar

Radar snapshots of supercells associated with tornado reports in Lee County and Lake County IN


Lee County	Lake County IN

Storm Reports

Storm Reports from May 27, 2019

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO IL
907 PM CDT FRI MAY 31 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0121 PM     HAIL             1.9 NE SOMONAUK         41.65N 88.66W
05/27/2019  M1.00 INCH       DE KALB            IL   COCORAHS

            CORRECTS PREVIOUS HAIL REPORT FROM 1.9 NE
            SOMONAUK FOR TIME.

0144 PM     HAIL             NAPERVILLE              41.77N 88.15W
05/27/2019  M1.50 INCH       DUPAGE             IL   AMATEUR RADIO

            FLOODING 1 FOOT NEAR NAPERVILLE ROAD.

0145 PM     TSTM WND DMG     1 N YORKVILLE           41.66N 88.45W
05/27/2019                   KENDALL            IL   TRAINED SPOTTER

            6FT DIAMETER TREE UPROOTED. TIME ESTIMATED
            BY RADAR.

0148 PM     TORNADO          3 NNE PLATTVILLE        41.57N 88.36W
05/27/2019                   KENDALL            IL   TRAINED SPOTTER

            A VERY BRIEF ROPE TORNADO OCCURRED IN A
            FIELD SOUTH OF WALKER ROAD BETWEEN 1:48 AND
            1:49 PM. LOCATION IS ESTIMATED BY RADAR AND
            DETAILED SPOTTER REPORT AS WELL AS A PHOTO
            TAKEN NEARBY FROM WALKER ROAD. THE TORNADO
            LASTED ABOUT 30 SECONDS BEFORE DISSIPATING
            AND PRODUCED NO KNOWN DAMAGE.

0150 PM     HAIL             AURORA                  41.76N 88.31W
05/27/2019  M1.00 INCH       KANE               IL   TRAINED SPOTTER



0155 PM     HAIL             OSWEGO                  41.68N 88.36W
05/27/2019  M2.00 INCH       KENDALL            IL   TRAINED SPOTTER

            MULTIPLE REPORTS OF HAIL TO 2 IN OWSEGO.
            WINDS TO 60 MPH.

0155 PM     HAIL             AURORA                  41.76N 88.31W
05/27/2019  M1.00 INCH       KANE               IL   TRAINED SPOTTER



0200 PM     HEAVY RAIN       OSWEGO                  41.68N 88.36W
05/27/2019  M0.49 INCH       KENDALL            IL   TRAINED SPOTTER

            HEAVY RAIN IN 15 MINUTES. 6-10 OF STANDING
            WATER IN NEIGHBORHOOD.

0200 PM     HEAVY RAIN       1.9 NE SOMONAUK         41.65N 88.66W
05/27/2019  M3.01 INCH       DE KALB            IL   COCORAHS

            3 INCHES OF RAIN IN 30 MINUTES.

0203 PM     HAIL             PLAINFIELD              41.61N 88.21W
05/27/2019  M1.00 INCH       WILL               IL   TRAINED SPOTTER



0204 PM     TORNADO          2 SW ROMEOVILLE         41.62N 88.14W
05/27/2019                   WILL               IL   NWS STORM SURVEY

            TORNADO WITH ESTIMATED MAXIMUM WINDS OF 85
            MPH TRACKED FOR 3.3 MILES EASTWARD ACROSS
            THE SOUTH SIDE OF THE TOWN OF ROMEOVILLE.
            ESTIMATED MAXIMUM PATH WIDTH WAS 300 YARDS.
            DAMAGE WAS LIGHT ROOF DAMAGE, LEANING
            UTILITY POLES, AND DOWNED LIMBS.

0207 PM     HAIL             3 S NAPERVILLE          41.74N 88.15W
05/27/2019  M1.00 INCH       DUPAGE             IL   TRAINED SPOTTER

            95TH AND NAPERVILLE PLAINFIELD ROAD IN SOUTH
            NAPEVILLE.

0208 PM     TSTM WND GST     BOLINGBROOK             41.70N 88.07W
05/27/2019  M60 MPH          WILL               IL   TRAINED SPOTTER



0209 PM     HAIL             BOLINGBROOK             41.70N 88.07W
05/27/2019  M1.25 INCH       WILL               IL   TRAINED SPOTTER



0210 PM     HAIL             BOLINGBROOK             41.70N 88.07W
05/27/2019  M1.50 INCH       WILL               IL   TRAINED SPOTTER



0210 PM     TSTM WND DMG     2 NNE CRYSTAL LAWNS     41.59N 88.15W
05/27/2019                   WILL               IL   NWS EMPLOYEE

            TREE UPROOTED ALONG RENWICK ROAD. TIME
            ESTIMATED BY RADAR.

0211 PM     HAIL             ROMEOVILLE              41.65N 88.09W
05/27/2019  M1.00 INCH       WILL               IL   EMERGENCY MNGR



0213 PM     HAIL             ROMEOVILLE              41.65N 88.09W
05/27/2019  M1.25 INCH       WILL               IL   OFFICIAL NWS OBS

            HIGHEST GUST TO 48 MPH AT NWS IN ROMEOVILE,
            IL.

0215 PM     HAIL             3 WSW BOLINGBROOK       41.69N 88.13W
05/27/2019  M1.00 INCH       WILL               IL   TRAINED SPOTTER

            TIME ESTIMATED BY RADAR.

0216 PM     HAIL             BOLINGBROOK             41.70N 88.07W
05/27/2019  M1.00 INCH       WILL               IL   TRAINED SPOTTER



0220 PM     HEAVY RAIN       2.8 SSW NAPERVILLE      41.74N 88.17W
05/27/2019  M1.32 INCH       DUPAGE             IL   COCORAHS

            HEAVY DOWNPOUR 2:04 TO 2:20.

0222 PM     HEAVY RAIN       BOLINGBROOK             41.70N 88.07W
05/27/2019  M2.00 INCH       WILL               IL   TRAINED SPOTTER

            ESTIMATED 2 INCH FLOOD DEPTH.
            ASHBURY/LIBERTY.

0229 PM     FLOOD            NAPERVILLE              41.78N 88.15W
05/27/2019                   DUPAGE             IL   TRAINED SPOTTER

            ESTIMATED TWO FEET OF STANDING WATER
            REPORTED IN ROADWAYS.

0230 PM     FLOOD            5 ESE BOULDER HILL      41.67N 88.25W
05/27/2019                   WILL               IL   DEPT OF HIGHWAYS

            WHEATLAND TOWNSHIP HIGHWAY COMMISSIONER
            REPORTS FLOODING OF HEGGS ROAD BETWEEN 111TH
            AND 119TH.

0230 PM     HAIL             AURORA                  41.76N 88.31W
05/27/2019  M0.88 INCH       KANE               IL   TRAINED SPOTTER



0233 PM     HEAVY RAIN       WINFIELD                41.87N 88.15W
05/27/2019  M1.88 INCH       DUPAGE             IL   EMERGENCY MNGR

            FELL IN 45 MINUTES.

0235 PM     TSTM WND DMG     1 ENE ORLAND PARK       41.63N 87.83W
05/27/2019                   COOK               IL   EMERGENCY MNGR

            DELAYED REPORT. A SECTION OF A TREE SNAPPED
            OFF AND FELL ONTO A HOUSE APPROXIMATELY AT
            8600 BLOCK OF W 145TH STREET. TIME IS
            ESTIMATED BY RADAR AND EM REPORT TO HAVE
            OCCURRED BETWEEN 2:30 AND 2:35 PM.

0240 PM     FLOOD            1 N PALOS HILLS         41.71N 87.82W
05/27/2019                   COOK               IL   FIRE DEPT/RESCUE

            BRIDGEVIEW FD REPORTS FLOODING OF ROBERTS
            ROAD UP TO 2FT IN DEPTH. WATER RESCUES ALSO
            REPORTED IN PALOS HEIGHTS, CHICAGO RIDGE,
            AND OAK LAWN.

0240 PM     HAIL             1 NE PALOS HILLS        41.71N 87.80W
05/27/2019  E1.50 INCH       COOK               IL   FIRE DEPT/RESCUE

            BRIDGEVIEW FD REPORTS HAIL OF UP TO 1.5 IN
            IN VICINITY OF STATION #2.

0240 PM     TSTM WND DMG     1 N WORTH               41.70N 87.80W
05/27/2019                   COOK               IL   FIRE DEPT/RESCUE

            BRIDGEVIEW FD REPORTS WIDESPREAD DAMAGE TO
            TREES AND POWERLINES FROM HAIL/WIND IN
            VICINITY OF STATION #2. DAMAGE ALONG HARLEM
            AVE AND CICERO AVE STRETCHED FROM
            APPROXIMATELY 103RD TO 111TH.

0242 PM     HAIL             AURORA                  41.76N 88.31W
05/27/2019  M0.88 INCH       KANE               IL   AMATEUR RADIO



0245 PM     HAIL             2 ESE LEMONT            41.66N 87.96W
05/27/2019  E1.00 INCH       COOK               IL   PUBLIC

            HAIL OF AT LEAST 1.0IN SIZE, POSSIBLY UP TO
            1.5IN SIZE. TIME ESTIMATED BY RADAR.

0245 PM     TSTM WND DMG     ALSIP                   41.67N 87.73W
05/27/2019                   COOK               IL   BROADCAST MEDIA

            BROADCAST MEDIA SHARED PICTURE OF GAS
            STATION CANOPY BLOW OFF IN ALSIP. EXACT
            LOCATION UNKNOWN. TIME ESTIMATED BY RADAR.

0245 PM     TSTM WND DMG     2 ESE LEMONT            41.66N 87.96W
05/27/2019                   COOK               IL   PUBLIC

            TREE UPROOTED, NUMEROUS BRANCHES DOWN IN THE
            AREA MAKING ROADWAYS NEAR IMPASSABLE. TIME
            ESTIMATED BY RADAR.

0246 PM     TSTM WND DMG     EVERGREEN PARK          41.73N 87.71W
05/27/2019                   COOK               IL   OTHER FEDERAL

            REPORTS OF NUMEROUS TREES AND POWER LINES
            DOWN NEAR AND AROUND THE 19TH WARD. RELAYED
            BY CHICAGO OEMC AND TIME ESTIMATED BASED ON
            RADAR.

0249 PM     HEAVY RAIN       3 SW MIDWAY AIRPORT     41.75N 87.78W
05/27/2019  M1.20 INCH       COOK               IL   CO-OP OBSERVER

            1.20 INCHES OF RAIN MEASURED IN 19 MINUTES.

0315 PM     FLOOD            3 WSW BOLINGBROOK       41.69N 88.13W
05/27/2019                   WILL               IL   TRAINED SPOTTER

            1-2 FEET OF STANDING WATER ON ROADWAYS IN
            VICINITY OF WEBER AND LILY CACHE IN
            BOLINGBROOK.

0326 PM     HEAVY RAIN       3 SW MIDWAY AIRPORT     41.75N 87.79W
05/27/2019  M1.73 INCH       COOK               IL   CO-OP OBSERVER

            FELL IN 48 MINUTES. UPDATE TO EARLIER
            REPORT.

0335 PM     HEAVY RAIN       WARRENVILLE             41.82N 88.18W
05/27/2019  M1.90 INCH       DUPAGE             IL   PUBLIC

            TOTAL RAINFALL OVER ABOUT 1 HOUR PERIOD.
            DURATION ESTIMATED BY RAINFALL.

0347 PM     FLOOD            NAPERVILLE              41.77N 88.15W
05/27/2019                   DUPAGE             IL   TRAINED SPOTTER

            REPORTED AT NAPERVILLE. FLOODING 1 FOOT DEEP
            GARTNER AVE AND CHARLES ROAD.

0406 PM     HAIL             STEGER                  41.47N 87.64W
05/27/2019  M1.50 INCH       WILL               IL   EMERGENCY MNGR



0409 PM     HAIL             PARK FOREST             41.48N 87.69W
05/27/2019  M1.25 INCH       COOK               IL   TRAINED SPOTTER



0410 PM     TSTM WND DMG     SUBLETTE                41.64N 89.23W
05/27/2019                   LEE                IL   PUBLIC

            TREES AND LIMBS DOWN.

0415 PM     FLOOD            CHICAGO RIDGE           41.71N 87.79W
05/27/2019                   COOK               IL   PUBLIC

            PUBLIC REPORTS ROADWAY FLOODING ALONG
            SOUTHWEST HIGHWAY IN CHICAGO RIDGE AREA.

0415 PM     TSTM WND DMG     STEGER                  41.47N 87.64W
05/27/2019                   COOK               IL   LAW ENFORCEMENT

            ROOF BLOWN OFF A BUILDING ON PARK AVENUE.
            TIME ESTIMATED. POSSIBLE TORNADO DAMAGE.

0421 PM     HAIL             CRETE                   41.44N 87.63W
05/27/2019  M0.88 INCH       WILL               IL   TRAINED SPOTTER



0427 PM     TORNADO          1 SSE SAUK VILLAGE      41.49N 87.55W
05/27/2019                   COOK               IL   NWS STORM SURVEY

            BRIEF TORNADO WITH MAXIMUM ESTIMATED WINDS
            OF 85 MPH AND WIDTH OF 50 YARDS PRODUCED
            ONLY MINOR DAMAGE TO ROOFS AND A DOWNED
            LIGHT POLE ONTO A CAR.

0430 PM     TSTM WND DMG     AMBOY                   41.71N 89.33W
05/27/2019                   LEE                IL   EMERGENCY MNGR

            CORRECTS PREVIOUS TSTM WND DMG REPORT FROM
            AMBOY FOR TIME. TREES AND LIMBS DOWN.

0432 PM     TORNADO          2 SSW DYER              41.48N 87.52W
05/27/2019                   LAKE               IN   TRAINED SPOTTER

            A COMBINATION OF TRAINED SPOTTER REPORTS
            (RELAYED BY HAMS IN REAL TIME) AND DAMAGE
            PICTURES RELAYED BY LAKE CO DEPUTY EM
            INDICATE BRIEF TORNADO OCCURRED NEAR E SAUK
            TRAIL AND HART STREET.

0433 PM     TORNADO          2 SW PAW PAW            41.67N 89.00W
05/27/2019                   LEE                IL   BROADCAST MEDIA

            VIDEO ON TWITTER OF A BRIEF TORNADO NEAR PAW
            PAW. TIME ESTIMATED BASED ON RADAR.

0435 PM     HEAVY RAIN       1 NE LYNWOOD            41.54N 87.53W
05/27/2019  M0.97 INCH       COOK               IL   AWOS

            LANSING AIRPORT MEASURED 0.97 INCHES OF
            RAINFALL IN 20 MINUTES.

0500 PM     FLOOD            HICKORY HILLS           41.72N 87.83W
05/27/2019                   COOK               IL   PUBLIC

            PICTURES SHARED ON SOCIAL MEDIA OF MINOR
            STREET FLOODING AND FILLING OF DETENTION
            PONDS IN HICKORY HILLS NEAR 95TH STREET AND
            84TH AVENUE.

0510 PM     FLOOD            NAPERVILLE              41.78N 88.15W
05/27/2019                   DUPAGE             IL   UNKNOWN

            NAPERVILLE COMMUNITY TELEVISION REPORTS
            FLOODING OF WEBSTER AND EAGLE STREETS AS
            WELL AS 5TH AT MILL.

0520 PM     HAIL             VALPARAISO              41.47N 87.06W
05/27/2019  M1.50 INCH       PORTER             IN   TRAINED SPOTTER



0553 PM     TSTM WND DMG     3 SW WOODWORTH          40.64N 87.88W
05/27/2019                   IROQUOIS           IL   TRAINED SPOTTER

            DELAYED REPORT RELAYED VIA SOCIAL MEDIA FROM
            2 SEPARATE SPOTTER REPORTS. TWO SNAPPED
            EVERGREENS BLOCKING IL-49 BETWEEN CRESCENT
            CITY AND CISSNA PARK. TIME ESTIMATED BY
            RADAR.

0615 PM     HEAVY RAIN       3 SW MIDWAY AIRPORT     41.74N 87.78W
05/27/2019  M2.56 INCH       COOK               IL   CO-OP OBSERVER



0618 PM     TSTM WND DMG     4 WNW EARL PARK         40.69N 87.48W
05/27/2019                   BENTON             IN   EMERGENCY MNGR

            POWER POLES DOWN NEAR N800W AND W600N. TIME
            ESTIMATED BY RADAR.

0640 PM     TSTM WND DMG     3 NW OXFORD             40.56N 87.29W
05/27/2019                   BENTON             IN   EMERGENCY MNGR

            DESTRUCTION OF OUTBUILDING.

0641 PM     HAIL             3 N OXFORD              40.56N 87.24W
05/27/2019  M1.00 INCH       BENTON             IN   PUBLIC

            NEAR BENTON CENTRAL HIGH SCHOOL. TIME
            ESTIMATED BASED ON RADAR.

0641 PM     TSTM WND DMG     3 N OXFORD              40.56N 87.24W
05/27/2019                   BENTON             IN   PUBLIC

            REPORTS OF TREE DAMAGE NEAR BENTON CENTRAL
            HS RELAYED BY MEDIA. TIME ESTIMATED BASED ON
            RADAR.

0644 PM     TSTM WND GST     3 SE FOWLER             40.59N 87.27W
05/27/2019  M71 MPH          BENTON             IN   MESONET

            MEASURED GUSTS AT A PERSONAL WEATHER
            STATION. ADDITIONAL MEASURED 70 MPH WIND
            GUSTS IN OTTERBEIN.

0646 PM     HAIL             OXFORD                  40.52N 87.25W
05/27/2019  M1.75 INCH       BENTON             IN   EMERGENCY MNGR



0700 PM     TSTM WND DMG     OTTERBEIN               40.49N 87.10W
05/27/2019                   BENTON             IN   PUBLIC

            POWER POLES DOWN IN OTTERBEIN. RELAYED BY
            MEDIA AND TIME ESTIMATED BASED ON RADAR.

Rain Reports

May 27, 2019 Rainfall

Public Information Statement
National Weather Service Chicago IL
1007 AM CDT Tue May 28 2019

...Morning Rainfall Roundup...

   The following are rain amounts for the previous 24-hours
   as measured in the morning by NWS Cooperative Observers
   and CoCoRaHS observers.
   Observations are usually taken between 6 AND 8 AM.

   24-hour rainfall amounts
       for Tuesday(05/28/19)...


Illinois                                       Rain
  Location (County):                           fall (inches)

  Somonauk 2NE (De Kalb).......................3.76
  Willow Springs (Cook)........................3.60
  Somonauk (De Kalb)...........................3.49
  Worth (Cook).................................2.62
  Elmhurst 2SE (Du Page).......................2.57
  Midway Coop (Cook)...........................2.56
  Oak Lawn 2SE (Cook)..........................2.54
  Villa Park 1NW (Du Page).....................2.52
  Aurora 4NE (Du Page).........................2.50
  North Aurora 2NE (Kane)......................2.45
  Elmhurst (Du Page)...........................2.25
  Elmhurst 1ESE (Du Page)......................2.23
  Lisle Morton Arb (Du Page)...................2.22
  Elmwood Park 1ESE (Cook).....................2.18
  Oak Lawn (Cook)..............................2.17
  Naperville 1NW (Du Page).....................2.16
  Wheaton 2NNE (Du Page).......................2.13
  Aurora 4SE (Du Page).........................2.12
  Glen Ellyn 1WSW (Du Page)....................2.08
  Bridgeview 1NNW (Cook).......................2.07
  Aurora 4SE (Du Page).........................2.07
  Batavia (Kane)...............................2.06
  Oak Park 1NNE (Cook).........................2.05
  Naperville 4SSW (Will).......................2.03
  Aurora (Kane)................................2.00
  Darien (Du Page).............................2.00
  Plainfield 3ESE (Will).......................1.99
  Lombard 1NNW (Du Page).......................1.93
  Ohare Airport (Cook).........................1.92
  Burr Ridge 2SW (Du Page).....................1.89
  Countryside 1ENE (Cook)......................1.86
  Aurora (Kane)................................1.85
  Chicago Ridge (Cook).........................1.85
  Batavia 1WSW (Kane)..........................1.84
  Homer Glen 1ENE (Will).......................1.82
  Oak Park 2S (Cook)...........................1.77
  Sugar Grove 1NE (Kane).......................1.76
  Sugar Grove 1ENE (Kane)......................1.76
  Palos Park 1SW (Cook)........................1.73
  Downers Grove 0.4NNE (Du Page)...............1.67
  Westmont 1SSW (Du Page)......................1.66
  Amboy (Lee)..................................1.65
  Romeoville (Will)............................1.63
  Chicago 6ESE (Cook)..........................1.55
  Oak Park 1SW (Cook)..........................1.55
  Westmont (Du Page)...........................1.53
  Earlville 3S (La Salle)......................1.52
  West Chicago (Du Page).......................1.51
  Harwood Heights (Cook).......................1.47
  Chicago 6NNE (Cook)..........................1.45
  Batavia 1WNW (Kane)..........................1.42
  Geneva 4WSW (Kane)...........................1.40
  Lansing (Cook)...............................1.38
  Batavia 2WNW (Kane)..........................1.38
  Geneva 1SSW (Kane)...........................1.38
  Park Ridge (Cook)............................1.37
  Mendota (La Salle)...........................1.30
  Midway (Cook)................................1.28
  Park Ridge 1WNW (Cook).......................1.27
  Lincolnwood 2E (Cook)........................1.27
  Plainfield 2SSE (Will).......................1.26
  Plainfield (Will)............................1.24
  Midlothian 1SE (Cook)........................1.15
  Bull Valley 2WNW (McHenry)...................1.15
  La Grange Park 1SSW (Cook)...................1.13
  Mendota (La Salle)...........................1.12
  Earlville 5NNE (De Kalb).....................1.03
  Oswego 5SSE (Kendall)........................1.00
  Emington 2SSE (Livingston)...................0.92
  Shabbona (De Kalb)...........................0.92
  Paw Paw (Lee)................................0.86
  St. Charles (Kane)...........................0.85
  St Anne (Kankakee)...........................0.85
  Roselle 1ESE (Du Page).......................0.78
  Park Forest (Cook)...........................0.78
  Park Forest 1NNE (Cook)......................0.74
  Chebanse (Kankakee)..........................0.71
  Woodstock 1SSW (McHenry).....................0.71
  South Beloit 2SE (Winnebago).................0.69
  Homewood (Cook)..............................0.64
  Elk Grove Village 2WSW (Cook)................0.63
  Elburn (Kane)................................0.63
  Elburn (Kane)................................0.62
  Pontiac 1SE (Livingston).....................0.62
  Elk Grove Village 1ESE (Cook)................0.61
  Waukegan (Lake)..............................0.59
  St. Charles 6NW (Kane).......................0.57
  Fox Lake 2SE (Lake)..........................0.57
  Schaumburg 2E (Cook).........................0.55
  Lake Villa 1SSW (Lake).......................0.55
  Wonder Lake 1WNW (McHenry)...................0.55
  Hoffman Estates 2SE (Cook)...................0.53
  Steward (Lee)................................0.53
  Streamwood 1W (Cook).........................0.52
  Woodstock 5nw (McHenry)......................0.52
  Roscoe 2ESE (Winnebago)......................0.51
  Roscoe 2se (Winnebago).......................0.51
  Arlington Heights 1SW (Cook).................0.50
  Pontiac (Livingston).........................0.50
  Park Forest 1SW (Cook).......................0.49
  Ashkum 5.6E (Iroquois).......................0.48
  Barrington (Lake)............................0.42
  Arlington Heights 3SSW (Cook)................0.42
  Flossmoor (Cook).............................0.41
  Rochelle (Ogle)..............................0.41
  Elgin (Kane).................................0.40
  Hebron (McHenry).............................0.40
  Lakemoor 2NW (McHenry).......................0.39
  Dwight (Livingston)..........................0.38
  Genoa (De Kalb)..............................0.38
  Elgin 2W (Kane)..............................0.38
  Waukegan 2N (Lake)...........................0.38
  Belvidere (Boone)............................0.37
  Hoffman Estates 5W (Cook)....................0.37
  De Kalb (De Kalb)............................0.37
  Lake Villa 2WSW (Lake).......................0.37
  Lockport 1SE (Will)..........................0.37
  Rochelle (Ogle)..............................0.37
  De Kalb 1SW (De Kalb)........................0.35
  Buffalo Grove 2N (Lake)......................0.35
  Cary (McHenry)...............................0.35
  Wheeling (Cook)..............................0.35
  New Lenox 3E (Will)..........................0.34
  Rockford 1NW (Winnebago).....................0.32
  Watseka (Iroquois)...........................0.32
  Dixon 3NNW (Lee).............................0.30
  Lake Forest 2NNE (Lake)......................0.30
  Algonquin 1N (McHenry).......................0.30
  McHenry (Stratton Lock & Dam) (McHenry)......0.30
  Marseilles Lock & Dam (La Salle).............0.30
  Kingston 2WNW (De Kalb)......................0.29
  Watseka 6.9WNW (Iroquois)....................0.29
  Elgin 8WSW (Kane)............................0.29
  Riverwoods (Lake)............................0.29
  Crystal Lake 1WSW (McHenry)..................0.29
  Botanic Gardens (Cook).......................0.28
  Palatine 1NNE (Cook).........................0.28
  Mundelein (Lake).............................0.28
  Glencoe (Cook)...............................0.27
  Ashton (Lee).................................0.27
  Highwood 1S (Lake)...........................0.27
  Rockford (Winnebago).........................0.27
  Plainfield 5SW (Kendall).....................0.26
  Lake Bluff 1W (Lake).........................0.26
  Rockford 3NE (Winnebago).....................0.26
  Rockford 2ENE (Winnebago)....................0.26
  Mundelein (Lake).............................0.26
  Lake Zurich 1N (Lake)........................0.25
  Joliet 2n (Will).............................0.25
  Dixon (Lee)..................................0.24
  Winthrop Harbor (Lake).......................0.24
  Winthrop Harbor 1SSW (Lake)..................0.24
  Rockford 6S (Winnebago)......................0.24
  Cropsey 1NE (Livingston).....................0.23
  Harvard (McHenry)............................0.22
  Chatsworth (Livingston)......................0.20
  Morris 5NNW (Grundy).........................0.20
  Chatsworth (Livingston)......................0.20
  Morris (Grundy)..............................0.19
  Capron (Boone)...............................0.19
  Joliet (Will)................................0.18
  Coal City 3N (Grundy)........................0.17
  New Lenox 2SE (Will).........................0.17
  De Kalb (De Kalb)............................0.16
  Brandon Road Lock & Dam (Will)...............0.16
  Crete 3E (Will)..............................0.15
  Peru (La Salle)..............................0.15
  Streator 1WSW (La Salle).....................0.14
  Elwood 5NE (Will)............................0.14
  Manhattan 5ENE (Will)........................0.14
  Bourbonnais (Kankakee).......................0.13
  Streator (Livingston)........................0.13
  Manhattan (Will).............................0.12
  Morris (Grundy)..............................0.12
  Channahon 2SSE (Will)........................0.11
  Ottawa (La Salle)............................0.10
  Minooka (Grundy).............................0.09
  Oglesby 1ESE (La Salle)......................0.09
  Dwight 4NNW (Grundy).........................0.08
  Coal City (Grundy)...........................0.08
  Kankakee (Kankakee)..........................0.07
  Herscher 3E (Kankakee).......................0.07
  Ottawa (La Salle)............................0.07
  Peru 1ENE (La Salle).........................0.07
  Manhattan 1ESE (Will)........................0.07
  Coal City 4NNW (Grundy)......................0.06
  Carbon Hill 3.1N (Grundy)....................0.06
  Channahon 1NNE (Will)........................0.06
  Manhattan 2SE (Will).........................0.06
  Morris 6ESE (Grundy).........................0.05
  Morris 2SSE (Grundy).........................0.05
  Ottawa 1NW (La Salle)........................0.04
  Ottawa 2N (La Salle).........................0.04
  La Salle (La Salle)..........................0.04
  Wilmington 3SE (Will)........................0.04
  Monee (Will).................................0.04
  Buckley (Iroquois)...........................0.03
  Romeoville (Will)............................0.03
  Paxton (Ford)................................0.01
  Beecher 3SSE (Will)..........................0.01
  Peotone (Will)...............................0.01
  Manteno 2NW (Kankakee)......................TRACE

Indiana                                        Rain
  Location (County):                           fall (inches)

  Chesterton 4E (Porter).......................2.05
  Griffith 1N (Lake)...........................1.38
  Valparaiso 6NW (Porter)......................1.06
  Morocco (Newton).............................0.93
  Porter 1S (Porter)...........................0.90
  Portage 3E (Porter)..........................0.84
  Rensselaer 5NW (Jasper)......................0.79
  Rensselaer 8ENE (Jasper).....................0.69
  Hammond 1SSW (Lake)..........................0.68
  Rensselaer 4N (Jasper).......................0.61
  Rensselaer (Jasper)..........................0.58
  Rensselaer 2SSW (Jasper).....................0.56
  Remington (Jasper)...........................0.49
  Valparaiso 2WNW (Porter).....................0.48
  Valparaiso 2N (Porter).......................0.45
  Kentland 2SSE (Newton).......................0.35
  Valparaiso 7WSW (Porter).....................0.34
  Rensselaer 10NNE (Jasper)....................0.33
  Valparaiso 2WSW (Porter).....................0.31
  De Motte 6S (Jasper).........................0.30
  Schererville 1E (Lake).......................0.19
  Valparaiso 6WSW (Porter).....................0.19
  Valparaiso (Porter)..........................0.17
  Schererville 1E (Lake).......................0.16
  Valparaiso 4SW (Porter)......................0.12
  St. John (Lake)..............................0.06
  Wheatfield 5W (Jasper).......................0.05
  Valparaiso 6SSW (Porter).....................0.05
  Crown Point (Lake)...........................0.03
  De Motte 4SW (Jasper)........................0.03
  Crown Point 1N (Lake)........................0.03
  Hebron 1NW (Porter)..........................0.03
  De Motte 1NNW (Jasper).......................0.02
  De Motte 1SSW (Jasper).......................0.02
  Crown Point 2WSW (Lake)......................0.01

$$

Environment

A low pressure system developing over Colorado on Sunday and lifting into eastern Nebraska by early Monday helped to organize an area of thunderstorms that produced widespread severe weather across the Plains during this period. As this low center continued into Iowa on Monday morning, the associated thunderstorms moved ahead into northern Illinois.

By noon on Monday, a warm front stretching east from the low across Illinois into southern Indiana was apparent in surface observations. Soon the thunderstorms began intensifying and becoming more organized along this warm front, with assistance from strong winds at mid and upper levels of the atmosphere.

Surface Map - Storms intensified along and ahead of the warm front during the afternoon

Additional Information

The Forecast


SPC Day 3 Categorical Outlook	SPC Day 3 Probabilistic Outlook	SPC Day 2 Categorical Outlook	SPC Day 2 Probabilistic Outlook

SPC Day 1 Categorical Outlook	SPC Day 1 Tornado Outlook	SPC Day 1 Hail Outlook	SPC Day 1 Wind Outlook

Summaries from other NWS Offices

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Fresh Snow and Temperature Outlook Ahead of Christmas Day

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