A Recap of Thursday Night's Severe Weather and Heavy Rainfall

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Meteorological Setup

    Moist southwest flow in the upper atmosphere has been parked across the central  U.S. since midweek.  On May 3rd, this helped to produce multiple rounds of severe storms across the Midwest.  Northern Illinois began to clear following morning and early afternoon cloud cover.  Temperatures warmed in the lower to mid 80s, the warmest in six weeks across many area communities.  The combination of this low-level warmth and moisture aided in strong instability over the area.  By late afternoon, with the help of convergence along a subtle frontal boundary oriented just north of the Illinois River, the instability began to be tapped by developing storms.  The satellite imagery below depicts the towering cumulus and scattered thunderstorm tops.  Note the "bubbling" thunderstorm top in northeast Illinois near O'Hare International Airport (ORD), reflecting a rapidly growing updraft.  This was the first of multiple severe and heavy-rain producing storms that would train from west to east across that area.  The significant instability allowed thunderstorms to explosively develop to well above the -20°C level, an often favorable threshold for large hail.  The deep moisture in the atmosphere, as seen below on the precipitable water analysis, favored the storms to produce heavy rainfall.  The somewhat diffuse surface features as indicated on the surface analysis helped the storms to propagate at a somewhat slow speed to further aid in heavy rainfall.  

6 pm:  Surface Weather Map  (Image = Dew Points)

6 pm:  Visible Satellite

Surface Analysis

Visible Satellite

 

6 pm:  Mixed-Layer CAPE (Instability) Analysis

6 pm:  Precipitable Water (Deep Moisture) Analysis

Instability

Precipitable Water

    The combination of the storms being well-organized and containing ice aloft and an overall high density of precipitation, likely aided in frequent lightning within these storms.  Below is an image of the cloud-to-ground lightning strikes between midnight and 1 am on the morning of May 4th, with a total of over 3,300! 

12 am - 1 am Cloud-to-Ground Lightning Strikes

Lightning Strikes


Radar 

6 pm - 9 pm:   0.5° KLOT Radar Loop  (~9 MB)

Radar Loop

This loop shows the multiple supercellular thunderstorms that developed across northern DuPage and Cook Counties, including over O'Hare International Airport.  A few of these storms even had anti-cyclonic rotation in the mid-levels, a generally rarer trait than cyclonic rotation, however still a sign of a deep well-organized storm.  Most of the storms in this train of activity were severe and produced very heavy rainfall.

8:39 pm:   KLOT Radar Image at ~30,000 ft

Radar

This high angle image depicts nearly 70 dBZ to 30,000 ft, along with a likely three-body scatter spike, a direct sign of large hail aloft with this storm.  It would produce quarter to golf ball size hail from west to east across Harwood Heights through 9 pm.

8:53 pm:   3.4° KLOT Radar Imagery at ~9,500 ft

Radar

Occasionally the KLOT dual-polarization data indicated likely large hail in the storms across northern Cook County.  This included during the image above.  Correlating with the high dBZ to the left are several pixels of very low differential reflectivity (which is an element that basically tells about the shape and orientation of the radar scatterers).  These very low values within a storm core indicate tumbling, randomly-oriented hail stones.

 

1:03 am:  KLOT 0.5° Reflectivity

1:03 am:  KLOT 0.5° Velocity

Reflectivity

Velocity

A well-organized area of wind-producing storms ahead of a developing mesoscale convective vortex (MCV) swept east across Livingston County in the early morning hours of May 4th.  The velocity image on the right indicate speeds of ~70 mph at 4,000 ft.  Accounting for the radar perspective of this, the velocities measured by the radar actually were more on the order of ~90 mph.  Wind damage occurred at the ground within this area, and a 64 mph gust was measured at Pontiac Airport.

 


Storm Reports

Local Area

National

Local Storm Reports

May 3rd Storm Reports

Text Listing

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
409 PM CDT FRI MAY 04 2012

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

0602 PM     HAIL             PLAINFIELD              41.62N 88.20W
05/03/2012  M0.75 INCH       WILL               IL   NWS EMPLOYEE

            DIME SIZED HAIL MEASURED

0635 PM     HAIL             NILES                   42.03N 87.81W
05/03/2012  M1.25 INCH       COOK               IL   TRAINED SPOTTER

            HAIL RANGING FROM DIME SIZED TO HALF DOLLAR SIZED. HEAVY
            RAIN RESULTING IN STANDING WATER 3 INCHES DEEP IN PARKING
            LOT

0637 PM     HAIL             NILES                   42.03N 87.81W
05/03/2012  E1.00 INCH       COOK               IL   TRAINED SPOTTER

0640 PM     HAIL             MORTON GROVE            42.04N 87.79W
05/03/2012  E1.25 INCH       COOK               IL   TRAINED SPOTTER

            HAIL FROM PENNY TO HALF DOLLAR SIZED - GROSS POINT AND
            OAKTON - NEAR NILES WEST H.S.

0640 PM     HAIL             EVANSTON                42.05N 87.69W
05/03/2012  M0.88 INCH       COOK               IL   TRAINED SPOTTER

0652 PM     HAIL             EVANSTON                42.05N 87.69W
05/03/2012  M1.25 INCH       COOK               IL   TRAINED SPOTTER

0710 PM     HAIL             PARK RIDGE              42.01N 87.84W
05/03/2012  E1.00 INCH       COOK               IL   COCORAHS

            0.69 INCHES RAINFALL

0713 PM     HAIL             DES PLAINES             42.03N 87.90W
05/03/2012  E0.25 INCH       COOK               IL   TRAINED SPOTTER

0718 PM     HAIL             NORRIDGE                41.97N 87.82W
05/03/2012  E0.75 INCH       COOK               IL   TRAINED SPOTTER

0720 PM     HAIL             DES PLAINES             42.03N 87.90W
05/03/2012  E1.00 INCH       COOK               IL   TRAINED SPOTTER

            TOUHY AND RIVER RD

0723 PM     HAIL             CHICAGO                 41.88N 87.63W
05/03/2012  E0.88 INCH       COOK               IL   TRAINED SPOTTER

            WINDS ESTIMATED 50 MPH. SMALL TREE LIMBS DOWN. TOUHY AND
            CALDWELL - FAR NORTHWEST CHICAGO.

0750 PM     NON-TSTM WND GST MOUNT PROSPECT          42.07N 87.94W
05/03/2012  E50.00 MPH       COOK               IL   TRAINED SPOTTER

            WINDS ESTIMATED 40-50 MPH. NO DAMAGE.

0805 PM     HAIL             MORTON GROVE            42.04N 87.79W
05/03/2012  M0.75 INCH       COOK               IL   TRAINED SPOTTER

            DIME TO PENNY SIZED HAIL. INTERSECTION OF GOLF AND
            SHERMER.

0820 PM     FLASH FLOOD      4 E DES PLAINES         42.04N 87.82W
05/03/2012                   COOK               IL   BROADCAST MEDIA

            DEMPSTER FLOODED BETWEEN OZARK AND WAUKEGAN ROAD

0820 PM     FLOOD            HARWOOD HEIGHTS         41.97N 87.81W
05/03/2012                   COOK               IL   LAW ENFORCEMENT

            7300 NATCHEZ BLOCKED DUE TO HIGH STANDING WATER

0830 PM     FLASH FLOOD      2 S EVANSTON            42.02N 87.69W
05/03/2012                   COOK               IL   BROADCAST MEDIA

            HOWARD AND WESTERN FLOODED CLOSED.

0837 PM     FLOOD            EVANSTON                42.05N 87.69W
05/03/2012                   COOK               IL   TRAINED SPOTTER

            HIGH STANDING WATER 6 INCHES DEEP IN PARKING LOT. WATER
            BUBBLING UP OUT OF SEWERS

0838 PM     HAIL             3 E HARWOOD HEIGHTS     41.97N 87.75W
05/03/2012  M1.50 INCH       COOK               IL   TRAINED SPOTTER

0845 PM     HAIL             3 ESE HARWOOD HEIGHTS   41.95N 87.75W
05/03/2012  E1.00 INCH       COOK               IL   TRAINED SPOTTER

            IN CITY OF CHICAGO - IRVING PARK RD, CICERO AVE, AND
            MILWAUKEE AVE

0846 PM     HAIL             6 E FRANKLIN PARK       41.95N 87.77W
05/03/2012  E1.00 INCH       COOK               IL   BROADCAST MEDIA

            IN CITY OF CHICAGO - PORTAGE PARK - CENTRAL AT ADDISON

0848 PM     HAIL             CHICAGO                 41.88N 87.63W
05/03/2012  E0.88 INCH       COOK               IL   TRAINED SPOTTER

            RAVENSWOOD MANOR

0855 PM     HAIL             4 ESE HARWOOD HEIGHTS   41.95N 87.74W
05/03/2012  E1.75 INCH       COOK               IL   PUBLIC

            IN THE CITY OF CHICAGO. INTERSECTION OF MILWAUKEE AND
            ADDISON.

0855 PM     HAIL             CHICAGO                 41.88N 87.63W
05/03/2012  E1.00 INCH       COOK               IL   TRAINED SPOTTER

            5200-6000 N CALIFORNIA AVE

0858 PM     HAIL             5 E HARWOOD HEIGHTS     41.98N 87.71W
05/03/2012  M1.00 INCH       COOK               IL   AMATEUR RADIO

            HAIL FELL IN ALBANY PARK.

0859 PM     HAIL             NILES                   42.03N 87.81W
05/03/2012  M1.00 INCH       COOK               IL   TRAINED SPOTTER

            HAIL FELL BETWEEN 800 PM - 820 PM.

0902 PM     HAIL             CHICAGO                 41.88N 87.63W
05/03/2012  E1.00 INCH       COOK               IL   PUBLIC

            WILSON AND BROADWAY - HAIL DIME TO QUARTER SIZED

0905 PM     HAIL             CHICAGO                 41.88N 87.63W
05/03/2012  E0.75 INCH       COOK               IL   TRAINED SPOTTER

            WRIGLEYVILLE

0918 PM     HAIL             CREST HILL              41.57N 88.11W
05/03/2012  E0.25 INCH       WILL               IL   TRAINED SPOTTER

0952 PM     HEAVY RAIN       3 SW MIDWAY AIRPORT     41.75N 87.79W
05/03/2012  M0.85 INCH       COOK               IL   CO-OP OBSERVER

            0.85 INCHES IN 15 MINUTES

0954 PM     HAIL             OAK LAWN                41.72N 87.75W
05/03/2012  E0.88 INCH       COOK               IL   NWS EMPLOYEE

            HIGH STANDING WATER 4 INCHES DEEP IN THE STREET

0955 PM     HAIL             OAK LAWN                41.72N 87.75W
05/03/2012  E1.00 INCH       COOK               IL   TRAINED SPOTTER

            STANDING WATER IN BACK YARD

0959 PM     HAIL             OAK LAWN                41.72N 87.75W
05/03/2012  E1.00 INCH       COOK               IL   FIRE DEPT/RESCUE

            FEW LARGER HAIL STONES. HAIL LASTED 3 MINUTES.

1008 PM     FLASH FLOOD      5 N CHATHAM             41.80N 87.62W
05/03/2012                   COOK               IL   BROADCAST MEDIA

            KING DR AND GARFIELD BOULEVARD. BETWEEN 51 AND 55TH
            STREETS. STREETS ARE IMPASSABLE.

1011 PM     FLASH FLOOD      2 SW BERWYN             41.82N 87.82W
05/03/2012                   COOK               IL   BROADCAST MEDIA

            OGDEN NOT PASSABLE DUE TO FLOODING BETWEEN JOLIET AND
            LAWNDALE.

1015 PM     HEAVY RAIN       1 SSW OAK LAWN          41.70N 87.76W
05/03/2012  M2.70 INCH       COOK               IL   COCORAHS

            IN 60 MINUTES

1018 PM     FLASH FLOOD      CHICAGO                 41.88N 87.63W
05/03/2012                   COOK               IL   TRAINED SPOTTER

            ELSTON CLOSED BETWEEN CICERO AND KOLMAR - NEAR THE
            EDENS/KENNEDY JCT

1050 PM     HAIL             2 S WORTH               41.66N 87.79W
05/03/2012  E0.88 INCH       COOK               IL   TRAINED SPOTTER

1130 PM     FLASH FLOOD      4 NNE ALSIP             41.72N 87.70W
05/03/2012                   COOK               IL   BROADCAST MEDIA

            KEDZIE FLOODED BETWEEN 87TH AND 103RD ST

1142 PM     FLASH FLOOD      3 N ALSIP               41.71N 87.74W
05/03/2012                   COOK               IL   BROADCAST MEDIA

            CICERO AVE FLOODED NEAR 103RD

1258 AM     TSTM WND DMG     LONG POINT              41.00N 88.89W
05/04/2012                   LIVINGSTON         IL   LAW ENFORCEMENT

            MULTIPLE UTILITY POLES AND WIRES DOWNED ALONG WITH A FEW
            TREES BLOWN DOWN IN THE AREA. TIME ESTIMATED BASED ON
            RADAR.

0100 AM     FLASH FLOOD      4 SSE LA SALLE          41.29N 89.08W
05/04/2012                   LA SALLE           IL   LAW ENFORCEMENT

            STATE POLICE RECIEVED SEVERAL REPORTS OF WATER OVER
            ROADS...INCLUDING INTERSTATE 39 NEAR MILE MARKER 54 WEST
            OF OGLESBY.

0100 AM     FLASH FLOOD      4 SSE LA SALLE          41.29N 89.08W
05/04/2012                   LA SALLE           IL   LAW ENFORCEMENT

            STATE POLICE RECEIVED REPORTS OF WATER OVER SEVERAL
            ROADS...INCLUDING INTERSTATE 39 NEAR MILE MARKER 54 WEST
            OF OGLESBY.

0107 AM     TSTM WND DMG     CORNELL                 40.99N 88.73W
05/04/2012                   LIVINGSTON         IL   LAW ENFORCEMENT

            SCATTERED WIND DAMAGE IN THE AREA...INCLUDING A FEW TREES
            AND UTILITY POLES DOWNED. TIME ESTIMATED BASED ON RADAR.

0115 AM     TSTM WND GST     PONTIAC                 40.88N 88.64W
05/04/2012  M64.00 MPH       LIVINGSTON         IL   AWOS

0115 AM     TSTM WND DMG     PONTIAC                 40.88N 88.64W
05/04/2012                   LIVINGSTON         IL   LAW ENFORCEMENT

            SCATTERED WIND DAMAGE...INCLUDING A FEW TREES AND
            MULTIPLE UTILITY POLES DOWNED. TIME ESTIMATED BASED ON
            RADAR AND PONTIAC AIRPORT OBSERVATION.

1000 AM     HEAVY RAIN       1 SSW OAK LAWN          41.70N 87.76W
05/04/2012  M3.20 INCH       COOK               IL   COCORAHS

            24-HOUR TOTAL. 0.5 INCHES AFTER 2.70 INCHES FELL IN ONE
            HOUR LAST NIGHT BETWEEN 915 PM AND 1015 PM.


&&

$$


Rainfall

Area NWS Cooperative Observers

State

Rainfall Reports

Rainfall

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
1024 AM CDT FRI MAY 04 2012

...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 FRIDAY(05/04/12)...


ILLINOIS                                       RAIN
  LOCATION (COUNTY):                           FALL (IN)

  OAK LAWN 1SSW (COOK).........................3.20
  BRACEVILLE (GRUNDY)..........................2.63
  EVANSTON 1SSE (COOK).........................2.47
  OAK LAWN 2SE (COOK)..........................2.17
  OGLESBY 0.4N (LA SALLE)......................2.16
  OGLESBY 1ESE (LA SALLE)......................2.12
  PERU 1SW (LA SALLE)..........................2.08
  LA SALLE (LA SALLE)..........................1.78
  SENECA 2SSW (LA SALLE).......................1.76
  PERU (LA SALLE)..............................1.63
  OHARE (COOK).................................1.62
  MONEE (WILL).................................1.59
  LINCOLNWOOD 2E (COOK)........................1.58
  EVANSTON 1N (COOK)...........................1.57
  PALOS PARK 2WSW (COOK).......................1.56
  COAL CITY (GRUNDY)...........................1.56
  MORRIS 6ESE (GRUNDY).........................1.48
  OTTAWA (LA SALLE)............................1.48
  HARWOOD HEIGHTS 2NNE (COOK)..................1.42
  NAPERVILLE 4SSW (WILL).......................1.42
  CHICAGO RIDGE (COOK).........................1.40
  STREATOR 1S (LIVINGSTON).....................1.40
  BURNHAM-HEGEWISCH 2NNW (COOK)................1.38
  MARSEILLES (LA SALLE)........................1.38
  CRETE 3E (WILL)..............................1.36
  WILMINGTON 3SE (WILL)........................1.34
  COAL CITY 4NNW (GRUNDY)......................1.33
  WILMINGTON 6NW (WILL)........................1.33
  SENECA 1NE (LA SALLE)........................1.32
  WORTH (COOK).................................1.29
  MARSEILLES 6WNW (LA SALLE)...................1.27
  MIDWAY 3SW (COOK)............................1.20
  OAK LAWN 1N (COOK)...........................1.19
  DWIGHT 4WNW (LIVINGSTON).....................1.18
  EARLVILLE 3S (LA SALLE)......................1.15
  OTTAWA 1ESE (LA SALLE).......................1.15
  TINLEY PARK 3NW (COOK).......................1.11
  ORLAND HILLS 1SE (COOK)......................1.10
  ORLAND HILLS 1S (COOK).......................1.08
  OTTAWA 1NW (LA SALLE)........................1.06
  ORLAND PARK 5WNW (WILL)......................1.06
  ELK GROVE VILLAGE 1ESE (COOK)................1.05
  RAVENSWOOD MANOR (COOK)......................1.04
  STREATOR (LIVINGSTON)........................1.03
  BOLINGBROOK 3NE (DU PAGE)....................1.02
  WILLOW SPRINGS (COOK)........................1.01
  DWIGHT (LIVINGSTON)..........................0.98
  OTTAWA (LA SALLE)............................0.96
  HOMER GLEN 4WNW (WILL).......................0.96
  LOCKPORT 1SE (WILL)..........................0.96
  CHICAGO 5NNW (COOK)..........................0.95
  BURR RIDGE 2SW (DU PAGE).....................0.94
  PEOTONE (WILL)...............................0.91
  PEOTONE (WILL)...............................0.91
  ROMEOVILLE (WILL)............................0.90
  NEW LENOX 2SE (WILL).........................0.89
  HOMER GLEN 1ENE (WILL).......................0.88
  OTTAWA 2N (LA SALLE).........................0.87
  MORRIS (GRUNDY)..............................0.86
  PEOTONE (WILL)...............................0.82
  PEOTONE (WILL)...............................0.80
  PEOTONE (WILL)...............................0.80
  WESTMONT 1SSE (DU PAGE)......................0.76
  BOTANIC GARDENS (COOK).......................0.75
  DRESDEN LOCK/DAM (GRUNDY)....................0.75
  ROSELLE 1ESE (DU PAGE).......................0.75
  CHANNAHON 2SSE (WILL)........................0.75
  NAPERVILLE 3ESE (DU PAGE)....................0.72
  CAROL STREAM (DU PAGE).......................0.71
  RICHTON PARK (COOK)..........................0.70
  PARK FOREST (COOK)...........................0.67
  AURORA 4SE (DU PAGE).........................0.66
  WESTMONT (DU PAGE)...........................0.66
  PLAINFIELD 1SW (WILL)........................0.65
  DOWNERS GROVE 2SE (DU PAGE)..................0.64
  WOODRIDGE 2NNE (DU PAGE).....................0.63
  JOLIET 2N (WILL).............................0.63
  MENDOTA (LA SALLE)...........................0.63
  PLAINFIELD (WILL)............................0.63
  NAPERVILLE 2ESE (DU PAGE)....................0.62
  MORRIS 2N (GRUNDY)...........................0.62
  LISBON 4NE (KENDALL).........................0.62
  MENDOTA 2SE (LA SALLE).......................0.62
  JOLIET LOCK/DAM (WILL).......................0.62
  BRIDGEVIEW 1NNW (COOK).......................0.61
  ELK GROVE VILLAGE 2WSW (COOK)................0.60
  LISLE 1SE (DU PAGE)..........................0.60
  NEWARK (KENDALL).............................0.60
  MANHATTAN 5ENE (WILL)........................0.59
  SCHAUMBURG  2E (COOK)........................0.58
  LISLE (DU PAGE)..............................0.58
  MANHATTAN (WILL).............................0.58
  FRANKFORT 2NNE (WILL)........................0.57
  BONFIELD 4NNE (KANKAKEE).....................0.56
  SHERIDAN (LA SALLE)..........................0.56
  COUNTRYSIDE 1NNE (COOK)......................0.55
  SUBLETTE (LEE)...............................0.55
  NAPERVILLE 1NW (DU PAGE).....................0.54
  MENDOTA 1N (LA SALLE)........................0.54
  CHANNAHON 1NNE (WILL)........................0.54
  WOODSTOCK 1SSW (MCHENRY).....................0.53
  HOMEWOOD (COOK)..............................0.52
  OSWEGO 5SSE (KENDALL)........................0.51
  MONTGOMERY 1SSE (KENDALL)....................0.50
  LANSING (COOK)...............................0.50
  WOODSTOCK (MCHENRY)..........................0.49
  BATAVIA (KANE)...............................0.48
  OAK PARK 1SW (COOK)..........................0.48
  LA GRANGE PARK 1SSW (COOK)...................0.47
  SYCAMORE 2NNE (DE KALB)......................0.47
  GLEN ELLYN 1NNW (DU PAGE)....................0.47
  AURORA 4NE (DU PAGE).........................0.47
  VILLA PARK 1NW (DU PAGE).....................0.47
  PLAINFIELD 5SW (KENDALL).....................0.47
  SUGAR GROVE 1NE (KANE).......................0.47
  SUGAR GROVE 1ENE (KANE)......................0.47
  CHICAGO 6ESE (COOK)..........................0.46
  BONFIELD 2NW (KANKAKEE)......................0.46
  WOODSTOCK 1WSW (MCHENRY).....................0.46
  JOLIET (WILL)................................0.46
  AURORA (KANE)................................0.45
  NORTH RIVERSIDE (COOK).......................0.45
  BATAVIA 1WSW (KANE)..........................0.45
  NEW LENOX 4SE (WILL).........................0.45
  LISLE MORTON ARB (DU PAGE)...................0.45
  AURORA (KANE)................................0.44
  OAK PARK 2S (COOK)...........................0.44
  MINOOKA (GRUNDY).............................0.44
  PONTIAC 1ESE (LIVINGSTON)....................0.44
  SHABBONA (DE KALB)...........................0.44
  YORKVILLE 2SE (KENDALL)......................0.44
  OAK PARK 1NNE (COOK).........................0.43
  GLEN ELLYN 2SSE (DU PAGE)....................0.43
  LOMBARD 1NNW (DU PAGE).......................0.43
  HANOVER PARK 2SSW (DU PAGE)..................0.43
  YORKVILLE 1W (KENDALL).......................0.43
  GENEVA 2ENE (KANE)...........................0.43
  GENEVA 1SSW (KANE)...........................0.43
  PAW PAW (LEE)................................0.43
  ELMHURST (DU PAGE)...........................0.42
  LOMBARD 1NNW (DU PAGE).......................0.42
  GLEN ELLYN 1NW (DU PAGE).....................0.42
  MONTGOMERY 2SSE (KENDALL)....................0.42
  NORTH AURORA 2NE (KANE)......................0.42
  LANSING (COOK)...............................0.41
  WEST CHICAGO 1SE (DU PAGE)...................0.41
  MORRIS 5NNW (GRUNDY).........................0.41
  ST CHARLES (KANE)............................0.41
  DE KALB (DE KALB)............................0.40
  GLEN ELLYN 1SE (DU PAGE).....................0.40
  YORKVILLE 1NE (KENDALL)......................0.40
  ST CHARLES 1SW (KANE)........................0.40
  BATAVIA 2WNW (KANE)..........................0.40
  BATAVIA 1WNW (KANE)..........................0.40
  GENEVA 2WSW (KANE)...........................0.40
  DIXON 2SW (LEE)..............................0.39
  WARRENVILLE 1NNW (DU PAGE)...................0.38
  GENEVA 3WSW (KANE)...........................0.38
  BATAVIA 1W (KANE)............................0.38
  PONTIAC (LIVINGSTON).........................0.38
  WEST CHICAGO (DU PAGE).......................0.37
  CHICAGO 6NNE (COOK)..........................0.37
  WHEATON (DU PAGE)............................0.37
  MANTENO 2SSE (KANKAKEE)......................0.37
  OAK BROOK (DU PAGE)..........................0.37
  BOURBONNAIS (KANKAKEE).......................0.36
  ELBURN (KANE)................................0.36
  PINGREE GROVE 1NW (KANE).....................0.36
  AMBOY (LEE)..................................0.36
  SCHAUMBURG 2SW (COOK)........................0.35
  ELBURN 3NNE (KANE)...........................0.35
  SCHAUMBURG 3WSW (COOK).......................0.34
  MIDWAY (COOK)................................0.34
  ST CHARLES 7NW (KANE)........................0.34
  ELGIN (KANE).................................0.33
  WOODSTOCK 4SW (MCHENRY)......................0.33
  HOFFMAN ESTATES 5W (COOK)....................0.32
  STREAMWOOD (COOK)............................0.32
  ELGIN 2W (KANE)..............................0.32
  MOMENCE 3NE (KANKAKEE).......................0.31
  STEWARD (LEE)................................0.31
  BARRINGTON (LAKE)............................0.30
  ELGIN (KANE).................................0.30
  ARLINGTON HEIGHTS 1SW (COOK).................0.30
  ELGIN 1S (KANE)..............................0.30
  PONTIAC 1SE (LIVINGSTON).....................0.30
  GENOA (DE KALB)..............................0.29
  INVERNESS 2S (COOK)..........................0.29
  MOUNT PROSPECT 3NE (COOK)....................0.29
  CORTLAND (DE KALB)...........................0.29
  ELGIN 2WNW (KANE)............................0.29
  ASHTON (LEE).................................0.29
  EMINGTON 2SSE (LIVINGSTON)...................0.29
  HUNTLEY 4W (MCHENRY).........................0.29
  ST. CHARLES 6NW (KANE).......................0.28
  ROCHELLE (OGLE)..............................0.27
  PALATINE 1E (COOK)...........................0.26
  GRANT PARK 6ENE (KANKAKEE)...................0.26
  BONFIELD 4WSW (KANKAKEE).....................0.26
  BULL VALLEY 2WNW (MCHENRY)...................0.25
  MARENGO (MCHENRY)............................0.25
  BOURBONNAIS 2NNE (KANKAKEE)..................0.24
  CARY 2NE (MCHENRY)...........................0.24
  CHENOA 4NNW (LIVINGSTON).....................0.23
  ROCKTON 1ESE (WINNEBAGO).....................0.23
  CHICAGO 5NE (COOK)...........................0.22
  DIXON 3NNW (LEE).............................0.22
  KANKAKEE (KANKAKEE)..........................0.22
  GILBERTS (KANE)..............................0.21
  ALGONQUIN 1N (MCHENRY).......................0.21
  ROCHELLE (OGLE)..............................0.21
  ROSCOE 2ESE (WINNEBAGO)......................0.20
  ROCKFORD 1NW (WINNEBAGO).....................0.20
  ROSCOE 2SE (WINNEBAGO).......................0.20
  CARY (MCHENRY)...............................0.19
  ROCKFORD 2ENE (WINNEBAGO)....................0.17
  KANKAKEE 3SE (KANKAKEE)......................0.16
  KANKAKEE (KANKAKEE)..........................0.14
  LINCOLNSHIRE 1.3WSW (LAKE)...................0.14
  FAIRBURY (LIVINGSTON)........................0.13
  WINNETKA 1ESE (COOK).........................0.13
  BUFFALO GROVE 2N (LAKE)......................0.13
  HIGHWOOD (LAKE)..............................0.13
  ROCKFORD (WINNEBAGO).........................0.13
  WOODSTOCK 5NW (MCHENRY)......................0.13
  WHEELING (COOK)..............................0.12
  SHIRLAND (WINNEBAGO).........................0.11
  HARVARD (MCHENRY)............................0.10
  HAWTHORN WOODS 1N (LAKE).....................0.10
  WONDER LAKE 1WNW (MCHENRY)...................0.10
  HARVARD (MCHENRY)............................0.10
  ROCKFORD 3NE (WINNEBAGO).....................0.10
  MUNDELEIN (LAKE).............................0.10
  ST ANNE (KANKAKEE)...........................0.10
  CHEBANSE (KANKAKEE)..........................0.09
  LAKEMOOR 2SE (LAKE)..........................0.09
  LAKE BLUFF 1W (LAKE).........................0.08
  LAKE VILLA 1SSW (LAKE).......................0.05
  GURNEE 2W (LAKE).............................0.05
  HEBRON (MCHENRY).............................0.05
  SPRING GROVE 2N (MCHENRY)....................0.05
  WAUKEGAN 2N (LAKE)...........................0.04
  HEBRON 1WNW (MCHENRY)........................0.04
  CHATSWORTH (LIVINGSTON)......................0.03
  HEBRON (MCHENRY).............................0.03
  BEACH PARK 1W (LAKE).........................0.03
  WINTHROP HARBOR (LAKE).......................0.03
  CHATSWORTH (LIVINGSTON)......................0.03
  BYRON 3N (OGLE)..............................0.03
  WATSEKA 5W (IROQUOIS)........................0.02
  GURNEE 2NE (LAKE)............................0.02
  WINTHROP HARBOR 1SSW (LAKE)..................0.02
  PECATONICA 2S (WINNEBAGO)....................0.02
  MILFORD (IROQUOIS)...........................0.02
  WAUKEGAN (LAKE)..............................0.02
  PAXTON (FORD)...............................TRACE
  LODA (IROQUOIS).............................TRACE
  WATSEKA (IROQUOIS)..........................TRACE

INDIANA                                        RAIN
  LOCATION (COUNTY):                           FALL (IN)

  SCHERERVILLE 2WSW (LAKE).....................0.81
  ST. JOHN (LAKE)..............................0.80
  HAMMOND 3SW (LAKE)...........................0.75
  (KB9UUO)NEW CHICAGO 1SSE (LAKE)..............0.73
  DYER 1WNW (LAKE).............................0.71
  HIGHLAND 1S (LAKE)...........................0.57
  GARY 4SSW (LAKE).............................0.54
  LAKES OF THE FOUR SEASONS (PORTER)...........0.53
  (WV90)HOBART 1ENE (LAKE).....................0.50
  HOBART 2E (LAKE).............................0.47
  CROWN POINT 2WSW (LAKE)......................0.36
  CROWN POINT 1N (LAKE)........................0.36
  CROWN POINT (LAKE)...........................0.34
  VALPARAISO 7WSW (PORTER).....................0.34
  PORTAGE 1ESE (PORTER)........................0.32
  LAKES OF THE FOUR SEASONS 2NNE (PORTER)......0.32
  PORTAGE 3E (PORTER)..........................0.27
  VALPARAISO 6WSW (PORTER).....................0.26
  VALPARAISO 5NNE (PORTER).....................0.25
  VALPARAISO 5NNE (PORTER).....................0.25
  PORTER 1S (PORTER)...........................0.24
  VALPARAISO 3WSW (PORTER).....................0.23
  CROWN POINT 8E (PORTER)......................0.22
  VALPARAISO (PORTER)..........................0.22
  VALPARAISO 6WSW (PORTER).....................0.22
  VALPARAISO 4SW (PORTER)......................0.21
  VALPARAISO 2NW (PORTER)......................0.21
  VALPARAISO 1ENE (PORTER).....................0.21
  VALPARAISO 1NNW (PORTER).....................0.21
  VALPARAISO 6S (PORTER).......................0.20
  VALPARAISO 2ESE (PORTER).....................0.20
  VALPARAISO 2N (PORTER).......................0.20
  LOWELL (LAKE)................................0.20
  HEBRON 4NE (PORTER)..........................0.19
  CROWN POINT 8ESE (PORTER)....................0.19
  VALPARAISO 1SE (PORTER)......................0.18
  CHESTERTON 1ENE (PORTER).....................0.18
  VALPARAISO 6SSW (PORTER).....................0.18
  (KB9F)VALPARAISO 4S (PORTER).................0.17
  HEBRON 1NW (PORTER)..........................0.17
  VALPARAISO (PORTER)..........................0.16
  DE MOTTE 1NNW (JASPER).......................0.15
  KOUTS 2WSW (PORTER)..........................0.13
  WHEATFIELD 2ENE (JASPER).....................0.10
  DE MOTTE 1SSW (JASPER).......................0.10
  (W9OPR)WHEATFIELD 1ENE (JASPER)..............0.10
  DE MOTTE 4SW (JASPER)........................0.09
  DE MOTTE 6S (JASPER).........................0.07
  WHEATFIELD 3S (JASPER).......................0.06
  RENSSELAER 10NNE (JASPER)....................0.06
  LAKE VILLAGE (NEWTON)........................0.04
  MOUNT AYR 2NNE (NEWTON)......................0.01
  REMINGTON (JASPER)..........................TRACE
  KENTLAND (NEWTON)...........................TRACE

$$


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