Alert archive / Illinois / River Flood Warnings in 2012

River Flood Warning 3, NWS Chicago, IL

May 7, 2012LaSalle County, Illinois

NWS Chicago, IL issued this river flood warning at May 7, 2012, 8:18 AM CDT for LaSalle County, Illinois. It took effect at May 7, 2012, 10:47 AM CDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
May 7, 2012, 8:18 AM CDT (13:18 UTC)
In effect from
May 7, 2012, 10:47 AM CDT
Expired
May 7, 2012, 5:14 PM CDT
In force
6 hr
Issued by
NWS Chicago, IL
Flood severity
Minor

County LaSalle County, IL

The radar

The Chicago radar (KLOT), 73 km from the middle of the area, began a volume at 13:19 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Vermilion River (N-IL) near Leonore (LNRI2). The gauge peaked at 17.01 ft at May 7, 2012, 12:00 PM CDT.

actionminormoderate510152005/0705/08
Action stage
15.5 ft
Minor stage
16 ft
Moderate stage
21 ft
Major stage
26 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05555300, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

The text

As transmitted, in the capitals the NWS used until 2016.

840 
WGUS43 KLOT 071318
FLWLOT
 
FLOOD WARNING 
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 
818 AM CDT MON MAY 7 2012

...THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A FLOOD WARNING
FOR THE FOLLOWING RIVERS IN ILLINOIS... 

  VERMILION RIVER NEAR LEONORE AFFECTING LA SALLE COUNTY

.TORRENTIAL RAINFALL OF BETWEEN 3 AND 5 INCHES FELL OVER PARTS OF
THE VERMILION RIVER WATERSHED. THIS IS RESULTING IN RAPID RISES
ON THE VERMILION RIVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...IF YOU ENCOUNTER A FLOODED ROADWAY...TURN AROUND AND
FIND AN ALTERNATE ROUTE.

ADDITIONAL INFORMATION CAN BE FOUND AT WEATHER.GOV/CHICAGO. 

&&

ILC099-080118-
/O.NEW.KLOT.FL.W.0003.120507T1547Z-120509T1920Z/
/LNRI2.1.ER.120507T1547Z.120508T0600Z.120509T1320Z.NO/
818 AM CDT MON MAY 7 2012

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A 

* FLOOD WARNING FOR 
  THE VERMILION RIVER NEAR LEONORE.
* UNTIL WEDNESDAY AFTERNOON.
* AT  745 AM MONDAY THE STAGE WAS 15.2 FEET. 
* FLOOD STAGE IS 16.0 FEET. 
* MINOR FLOODING IS FORECAST. 
* FORECAST...RISE ABOVE FLOOD STAGE BY LATE THIS MORNING AND CONTINUE
  TO RISE TO NEAR 17.8 FEET BY EARLY TUESDAY. THE RIVER WILL FALL 
  BELOW FLOOD STAGE BY WEDNESDAY MORNING.


$$

WDM
4 follow-up statements
972 
WGUS83 KLOT 072003
FLSLOT
 
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 
303 PM CDT MON MAY 7 2012

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN INDIANA...
ILLINOIS...
 
  KANKAKEE RIVER AT SHELBY AFFECTING LAKE AND NEWTON COUNTIES 
  VERMILION RIVER NEAR LEONORE AFFECTING LA SALLE COUNTY 

.THE TORRENTIAL RAIN OVER THE KANKAKEE AND VERMILLION RIVER BASINS ON
SUNDAY INTO EARLY MONDAY MORNING RESULTED IN RAPID RISES ON PORTIONS OF
BOTH RIVERS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...IF YOU ENCOUNTER A FLOODED ROADWAY...TURN AROUND AND
FIND AN ALTERNATE ROUTE.

&&

INC089-111-081003-
/O.EXT.KLOT.FL.W.0004.120508T0200Z-120510T0000Z/
/SLBI3.1.ER.120508T0200Z.120508T1800Z.120509T1800Z.NO/
303 PM CDT MON MAY 7 2012

THE FLOOD WARNING CONTINUES FOR
  THE KANKAKEE RIVER AT SHELBY.
* FROM THIS EVENING TO WEDNESDAY EVENING.
* AT  245 PM MONDAY THE STAGE WAS 8.6 FEET. 
* FLOOD STAGE IS 9.0 FEET. 
* MINOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE BY TONIGHT AND CONTINUE TO RISE 
  TO NEAR 9.4 FEET BY TUESDAY AFTERNOON. THE RIVER IS EXPECTED TO FALL
  BELOW FLOOD STAGE BY WEDNESDAY EVENING.
* IMPACT...AT 9.0 FEET...LOWLAND AGRICULTURAL FLOODING BEGINS.

$$

ILC099-081002-
/O.EXT.KLOT.FL.W.0003.000000T0000Z-120509T0130Z/
/LNRI2.1.ER.120507T1415Z.120508T0000Z.120508T1930Z.NO/
303 PM CDT MON MAY 7 2012

THE FLOOD WARNING CONTINUES FOR
  THE VERMILION RIVER NEAR LEONORE.
* UNTIL TUESDAY EVENING.
* AT  145 PM MONDAY THE STAGE WAS 16.8 FEET. 
* FLOOD STAGE IS 16.0 FEET. 
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 17.0 FEET BY THIS
  EVENING. THE RIVER WILL FALL BELOW FLOOD STAGE TUESDAY AFTERNOON.
* IMPACT...AT 16.0 FEET...WATER BEGINS TO FLOOD LOW LYING AGRICULTURAL
  LAND NEAR RIVER.

$$

RC
540 
WGUS83 KLOT 072119 CCA
FLSLOT

FLOOD STATEMENT ...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
303 PM CDT MON MAY 7 2012

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN INDIANA...
ILLINOIS...

  KANKAKEE RIVER AT SHELBY AFFECTING LAKE AND NEWTON COUNTIES
  VERMILION RIVER NEAR LEONORE AFFECTING LA SALLE COUNTY

.THE TORRENTIAL RAIN OVER THE KANKAKEE AND VERMILLION RIVER BASINS ON
SUNDAY INTO EARLY MONDAY MORNING RESULTED IN RAPID RISES ON PORTIONS OF
BOTH RIVERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...IF YOU ENCOUNTER A FLOODED ROADWAY...TURN AROUND AND
FIND AN ALTERNATE ROUTE.

&&

INC089-111-081003-
/O.EXT.KLOT.FL.W.0004.120508T0200Z-120510T0000Z/
/SLBI3.1.ER.120508T0200Z.120508T1800Z.120509T1800Z.NO/
303 PM CDT MON MAY 7 2012

THE FLOOD WARNING CONTINUES FOR
  THE KANKAKEE RIVER AT SHELBY.
* FROM THIS EVENING TO WEDNESDAY EVENING.
* AT  245 PM MONDAY THE STAGE WAS 8.6 FEET.
* FLOOD STAGE IS 9.0 FEET.
* MINOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE BY TONIGHT AND CONTINUE TO RISE
  TO NEAR 9.4 FEET BY TUESDAY AFTERNOON. THE RIVER IS EXPECTED TO FALL
  BELOW FLOOD STAGE BY WEDNESDAY EVENING.
* IMPACT...AT 9.0 FEET...LOWLAND AGRICULTURAL FLOODING BEGINS.

$$

ILC099-081002-
/O.COR.KLOT.FL.W.0003.000000T0000Z-120509T0130Z/
/LNRI2.1.ER.120507T1415Z.120508T0000Z.120508T1930Z.NO/
303 PM CDT MON MAY 7 2012

THE FLOOD WARNING CONTINUES FOR
  THE VERMILION RIVER NEAR LEONORE.
* UNTIL TUESDAY EVENING.
* AT  145 PM MONDAY THE STAGE WAS 16.8 FEET.
* FLOOD STAGE IS 16.0 FEET.
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL FALL BELOW FLOOD STAGE BY TUESDAY AFTERNOON.
* IMPACT...AT 16.0 FEET...WATER BEGINS TO FLOOD LOW LYING AGRICULTURAL
  LAND NEAR RIVER.

$$

RC
996 
WGUS83 KLOT 072151
FLSLOT
 
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 
451 PM CDT MON MAY 7 2012

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN 
ILLINOIS...
 
  VERMILION RIVER NEAR LEONORE AFFECTING LA SALLE COUNTY 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...IF YOU ENCOUNTER A FLOODED ROADWAY...TURN AROUND AND
FIND AN ALTERNATE ROUTE.

&&

ILC099-080317-
/O.EXT.KLOT.FL.W.0003.000000T0000Z-120508T0317Z/
/LNRI2.1.ER.120507T1415Z.120507T1700Z.120507T2117Z.NO/
451 PM CDT MON MAY 7 2012

THE FLOOD WARNING CONTINUES FOR
  THE VERMILION RIVER NEAR LEONORE.
* UNTIL THIS EVENING.
* AT  345 PM MONDAY THE STAGE WAS 16.1 FEET. 
* FLOOD STAGE IS 16.0 FEET. 
* MINOR FLOODING IS OCCURRING.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO BELOW FLOOD STAGE BY 
  LATE THIS AFTERNOON.
* IMPACT...AT 16.0 FEET...WATER BEGINS TO FLOOD LOW LYING AGRICULTURAL
  LAND NEAR RIVER.

$$
164 
WGUS83 KLOT 072214
FLSLOT
 
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 
514 PM CDT MON MAY 7 2012

...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN 
ILLINOIS...
 
  VERMILION RIVER NEAR LEONORE AFFECTING LA SALLE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...IF YOU ENCOUNTER A FLOODED ROADWAY...TURN AROUND AND
FIND AN ALTERNATE ROUTE.

&&

ILC099-072244-
/O.CAN.KLOT.FL.W.0003.000000T0000Z-120508T0317Z/
/LNRI2.1.ER.120507T1415Z.120507T1700Z.120507T2109Z.NO/
514 PM CDT MON MAY 7 2012

THE FLOOD WARNING IS CANCELLED FOR
  THE VERMILION RIVER NEAR LEONORE.
* AT  445 PM MONDAY THE STAGE WAS 15.8 FEET. 
* FLOOD STAGE IS 16.0 FEET. 
* FELL BELOW FLOOD STAGE AT  4:09 PM MONDAY.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO 12.8 FEET BY TUESDAY 
  MORNING.
* IMPACT...AT 16.0 FEET...WATER BEGINS TO FLOOD LOW LYING AGRICULTURAL
  LAND NEAR RIVER.

$$

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Chicago, IL wrote its last area forecast discussion before this river flood warning went out at May 7, 6:54 AM CDT, 1 hour 24 minutes earlier.

Area forecast discussion, May 7, 6:54 AM CDT, 1 hour 24 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
654 AM CDT MON MAY 7 2012

.DISCUSSION...
320 AM CDT

SHORT TERM...TODAY THROUGH WEDNESDAY NIGHT...

TODAY AND TONIGHT...AN INVERTED TROUGH EXTENDS FROM NORTH CENTRAL
TEXAS THROUGH NORTHEASTERN ILLINOIS THIS MORNING.  THE LOWS WARM
FRONT ARCS FROM SPRINGFIELD ILLINOIS...THROUGH DELAWARE COUNTY
INDIANA. CONVECTION HAS REMAINED ACTIVE OVERNIGHT INTO EARLY THIS
MORNING...ESPECIALLY ALONG AND NORTH OF THE WARM FRONT. A LARGE
OUTFLOW BOUNDARY IS PUSHING SOUTH AWAY FROM THE MAIN LINE OF
STORMS...WITH ISOLATED STORMS BEING INITIATED BY THE OUTFLOW
BOUNDARY. THE EVENT HAS TRANSITIONED FROM SEVERE WEATHER TO A
HEAVY RAIN/FLASH FLOODING DUE TO SLOW MOVING STORMS AND PW VALUES
BETWEEN 1.5 TO 2 INCHES.

THE MAIN LOW PASSES THROUGH CENTRAL ILLINOIS TODAY AS DOES THE
MOISTURE AXIS. WINDS FLIP TO NORTHWEST BEHIND THE LOW AND PW
VALUES DROP FROM AROUND 1.5 INCHES TO 0.75 INCHES LATE TONIGHT.
GIVEN THE NOCTURNAL CONVECTION AND CLOUDY FORECAST...KEPT TEMPS A
FEW DEGREES BELOW GUIDANCE. WITH LESS HEATING TOMORROW...NOT
EXPECTING AS MUCH CAPE. THE NAM CURRENTLY FEATURES A MAX CAPE OF
AROUND 2000 J/KG EARLY ALONG AND SOUTHEAST OF THE I-55 CORRIDOR
WITH VALUES DECLINING THROUGH THE DAY. GIVEN THE NAMS WET BIAS AND
THEREFORE TYPICAL OVERESTIMATION OF CAPE...THINKING 1500 J/KG OR
LESS IS MOST LIKELY. 0-6 KM SHEAR ALSO DECREASES AS THE INVERTED
TROUGH MOVES OFF...WITH 35 KT OR LESS THROUGHOUT THE REGION.

MODEL SOUNDINGS INDICATE WARM AIR WILL BE SEEPING IN ALOFT AHEAD OF
THE WARM FRONT.  THE WARM AIR WILL CAUSE A CAP WHICH WILL FURTHER
HINDER SOTRM DEVELOPMENT AND THEREFORE SEVERE WEATHER. BASED ON
THE PARAMETERS...THINKING THUNDERSTORMS WILL BE MORE LIKELY
SOUTHEAST AND ALONG THE 1-55 CORRIDOR WHERE THE ENVIRONMENT IS
MORE FAVORABLE. MAIN THREAT WILL BE HEAVY RAIN...ESPECIALLY WITH
THE VERY MOIST AIR MASS OVERHEAD.

TONIGHT...WENT WITH THE QUICKER NAM AND GFS SOLUTIONS IN REGARD TO
THE NOCTURNAL PRECIP.  EXPECTING PRECIP TO MOVE QUICKLY OFF TO THE
EAST BEHIND THE DEPARTING LOW...ESPECIALLY SINCE MOISTURE WILL BE
RETREATING RAPIDLY. STAYED WITH GUIDANCE ON OVERNIGHT LOWS. THE
NIGHT WILL START CLOUDY AND CLEAR OUT LATE...LEADING TO A SLOW
DROP IN TEMPS UNTIL THE SKY CLEARS.

TUESDAY...THE DAY STARTS OFF DRY BEHIND THE FRONT AND LOW PASSAGE.
THE UPPER LEVEL TROUGH SWINGS THROUGH WISCONSIN AND NORTHERN
ILLINOIS TUESDAY AFTERNOON AND EVENING. MODELS INDICATE CONVECTION
WILL FORM TUESDAY AFTERNOON ACROSS WISCONSIN.  CAPE VALUES ARE
MEAGER AT BEST AND WITH THE TROUGH SINKING SOUTH OUT OF CANADA...AM
QUESTIONING HOW MUCH MOISTURE THE MODELS KEEP WITH THIS SYSTEM.
DOWNPLAYING THE PRECIP POTENTIAL IN THE LOT CWA...THINKING THE
MAJORITY OF PRECIP WILL DRY UP BEFORE ENTERING NORTHERN IL.  ONCE
AGAIN WENT WITH GUIDANCE FOR TEMPS...AS THE DAY WILL BEGIN SUNNY
WITH INCREASING CLOUD COVER.

BOTH THE GFS NAM...AND THE ECMWF TO A LESSER EXTENT...SUGGEST A
MCS WILL FORM TUESDAY NIGHT IN EAST CENTRAL WI AND SINK SOUTH OVER
THE LAKE. WITH ALL 3 MODELS DEPICTING A SIMILAR STORY...DECIDED TO
PUT IN SLIGHT CHANCE TO CHANCE POPS FOR TUESDAY NIGHT...HOWEVER
CONFIDENCE IS LOW REGARDING WHERE THE ACTUAL MCS WOULD FORM IF AT
ALL.

WEDNESDAY...A DRY PATTERN BEGINS ON WEDNESDAY AS HIGH PRESSURE MOVES
IN FROM THE CENTRAL PLAINS.  SLIGHTLY COOLER TEMPS EXPECTED WITH
NORTHWEST UPPER LEVEL FLOW OUT OF CANADA.

JEE

EXTENDED...THURSDAY THROUGH SUNDAY...

410 AM CDT

OVERALL...THE EXTENDED FORECAST LOOKS DRY WITH AVERAGE TEMPS. A
BROAD RIDGE SETS UP OVER THE GREAT PLAINS MID WEEK AND PASSES OVER
THE MISSISSIPPI RIVER VALLEY LATE IN THE WEEK. NEXT CHANCE OF
PRECIP ARRIVES FRIDAY NIGHT AS A SURFACE LOW PASSES NORTH OF THE
GREAT LAKES AND ITS COLD FRONT PASSES THROUGH THE AREA LATE FRIDAY
NIGHT. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO FORM ALONG THE
COLD FRONT AND PERSIST THROUGH THE EARLY PART OF SATURDAY. THE
ECMWF HAS THE BAND OF PRECIP MOVING THROUGH THE AREA FASTER THAN
THE GFS...BUT AT THIS DISTANCE...DECIDED TO KEEP PRECIP IN THE
FORECAST SPANNING BOTH FORECASTS.

FOR TEMPS...MAX TEMPS REMAIN AROUND THE CLIMATIC NORMAL...IN THE MID
60S TO LOW 70S. OVERNIGHT LOWS APPEAR TO REMAIN WELL ABOVE FREEZING
THROUGHOUT THE EXTENDED.

JEE

&&

.AVIATION...

//ORD AND MDW CONCERNS...UPDATED 12Z...

* SHOWERS THROUGH EARLY AFTERNOON.
* POSSIBLE THUNDER THIS MORNING.
* IFR/LIFR CIGS LIFTING TO MVFR LATE THIS MORNING AND VFR THIS
  AFTERNOON.
* POSSIBLE WIND SHIFT TO THE NORTHEAST/EAST LATE THIS AFTERNOON OR
  EARLY THIS EVENING. CMS

//DISCUSSION...UPDATED 12Z...

AREA OF RAIN WITH EMBEDDED THUNDERSTORMS ENTERING INTO NORTHWEST
IL HAS SLOWLY WEAKENED AND HAVE BACKED OFF THUNDER MENTION TO JUST
VCTS AS NEW DEVELOPMENT IS STILL POSSIBLE. BUT EXPECT BULK OF THE
ACTIVITY TO BE LIGHT/MODERATE RAIN THROUGH MID/LATE MORNING WITH A
FEW SHOWERS PERHAPS LINGERING INTO THE EARLY AFTERNOON.

LOW CIGS HAVE DEVELOPED BUT STILL APPEAR TO BE BOUNCING AROUND
QUITE A BIT. WITH THE SURFACE LOW NOW EAST OF CMI...WINDS HAVE
SHIFTED AROUND TO THE NORTHWEST AND THINK LIFR CIGS SHOULD LIFT
THROUGH IFR INTO LOW MVFR THIS MORNING THOUGH CONFIDENCE ON EXACT
CLOUD HEIGHTS AS WELL AS THEIR DURATION IS STILL LOW. POSSIBLE
MVFR CIGS COULD PERSIST INTO THIS AFTERNOON AND WILL NEED TO BE
MONITORED THIS MORNING.

AS NOTED...WINDS SHIFTED WESTERLY AND GUSTY IN A FEW LOCATIONS BUT
SHOULD DIMINISH OVER THE NEXT FEW HRS AS THEY TURN BACK MORE
NORTHERLY. WINDS REMAIN NORTHERLY INTO THIS AFTERNOON BUT MODELS
HINTING AT A WEAK RIDGE DEVELOPING ALONG THE WEST SIDE OF THE LAKE
BY EVENING WHICH MAY ALLOW WINDS TO SWING AROUND TO THE NORTHEAST.
NOT TOO CONFIDENT THAT WILL HAPPEN AND WHILE ITS NOT IN THE THIS
SET OF TAFS...IT REMAINS A POSSIBILITY. WINDS WILL THEN SHIFT BACK
AROUND LIGHT NORTHWESTERLY LATER THIS EVENING. CMS

//ORD AND MDW CONFIDENCE...UPDATED 12Z...

* HIGH CONFIDENCE SHOWERS WILL CONTINUE THIS MORNING...MEDIUM
  CONFIDENCE ON THEIR ENDING TIME.
* HIGH CONFIDENCE IFR/LIFR CIGS WILL LIFT TO MVFR THIS MORNING...
  LOW CONFIDENCE REGARDING WHEN.
* MEDIUM CONFIDENCE REGARDING WINDS...LOW CONFIDENCE ON A POSSIBLE
  SHIFT TO THE EAST/NORTHEAST LATE THIS AFTERNOON. CMS

//OUTLOOK FOR ORD/MDW FOR 00Z WEDNESDAY-12Z MONDAY...UPDATED 12Z...

* TUESDAY NIGHT...CHANCE OF SHRA/MVFR LATE.
* WEDNESDAY...CHANCE OF SHRA. MVFR POSSIBLE EARLY.
* THURSDAY...VFR.
* FRIDAY...VFR. CHANCE OF SHRA FRIDAY NIGHT.
* SATURDAY...CHANCE OF SHRA/SLIGHT CHANCE OF TSRA.
* SUNDAY...VFR. CHANCE OF SHRA. CMS

&&

.MARINE...

317 AM...LOW PRESSURE OVER CENTRAL IL WILL LIFT NORTHEAST ACROSS
NORTHERN INDIANA TODAY REACHING LAKE ERIE TONIGHT. THERE COULD BE A
FEW HOUR PERIOD EARLY THIS MORNING WHERE WINDS OVER SOUTHERN LAKE
MICHIGAN GUST INTO THE 15-25 KT RANGE AS THE LOW APPROACHES WITH A
SOUTHEAST DIRECTION SHIFTING TO THE NORTHEAST THIS MORNING. WINDS
WILL THEN SHIFT NORTHERLY AND DIMINISH INTO THE 10-15 KT RANGE
THIS AFTERNOON. A WEAK RIDGE MAY ALLOW WINDS TO DIMINISH EVEN
FURTHER ALONG THE WESTERN SIDE OF THE LAKE. A SECOND LOW WILL MOVE
SOUTHEAST ACROSS THE NORTHERN LAKES TONIGHT AND MERGE WITH THE
FIRST LOW LIFTING NORTHEAST ACROSS THE EASTERN LAKES ON TUESDAY. A
COLD FRONT WILL THEN MOVE SOUTH ACROSS THE LAKE TUESDAY NIGHT INTO
WEDNESDAY MORNING WITH NORTHERLY WINDS POSSIBLY INCREASING TO
15-25 KT. A LARGE RIDGE OF HIGH PRESSURE WILL THEN BUILD EAST
ACROSS THE LAKES REGION WEDNESDAY NIGHT INTO THURSDAY. CMS

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...FLASH FLOOD WATCH...ILZ003-ILZ004-ILZ005-ILZ006-ILZ008-ILZ010-
     ILZ011-ILZ012-ILZ013-ILZ014-ILZ019-ILZ020-ILZ021-ILZ022-
     ILZ023-ILZ032-ILZ033-ILZ039 UNTIL 7 AM MONDAY.

IN...FLASH FLOOD WATCH...INZ001-INZ002-INZ010-INZ011-INZ019 UNTIL 7
     AM MONDAY.

LM...NONE.
&&
Hazardous weather outlook, May 7, 4:59 AM CDT, 3 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
459 AM CDT MON MAY 7 2012

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
081000-
WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE-
DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-
IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON-
459 AM CDT MON MAY 7 2012 /559 AM EDT MON MAY 7 2012/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TODAY AND TONIGHT.

  WEATHER HAZARDS EXPECTED:

 THUNDERSTORMS...SOME MAY PRODUCE...
  HEAVY RAINFALL...PRODUCING LOCALIZED FLASH FLOODING
  GUSTY WINDS
  PEA SIZED HAIL

  AREAS AFFECTED AND TIMING:

   NOCTURNAL CONVECTION WILL CONTINUE TO MOVE THROUGH NORTHERN IL
   AND NORTHWEST INDIANA THIS MORNING. ADDITIONAL ISOLATED
   THUNDERSTORMS MAY FORM ALONG AND SOUTHEAST OF THE INTERSTATE 55
   CORRIDOR.

  DISCUSSION:

   A WARM FRONT REMAINS DRAPED ACROSS NORTH CENTRAL ILLINOIS THIS
   MORNING. NOCTURNAL CONVECTION CONTINUES TO PASS THROUGH THE
   REGION...AND NEW CONVECTION IS FORMING ALONG THE WARM FRONT.
   THE ONGOING CONVECTION HAS EATEN AWAY AT ALMOST ALL OF THE
   AVAILABLE INSTABILITY...AND 0-6 KM SHEAR IS NOT IMPRESSIVE.
   PRECIPITABLE WATER VALUES STILL REMAIN AROUND 1.5 INCHES ACROSS
   THE REGION. STORMS ARE GENERALLY MOVING TOWARD THE NORTHEAST
   AROUND 25 MPH. BETWEEN THE HIGH PRECIPITABLE WATER VALUES AND
   SLOW MOVING STORMS...HEAVY RAIN IS LIKELY THROUGH THIS
   AFTERNOON...ESPECIALLY ALONG AND SOUTHEAST OF THE INTERSTATE 55
   CORRIDOR. LOCALIZED FLASH FLOODING MAY OCCUR IN THOSE
  COMMUNITIES THAT SEE THESE MAXIMUM RAINFALL AMOUNTS. GUSTY WINDS
   AND/OR SMALL HAIL MAY ALSO ACCOMPANY STRONGER STORMS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS FRIDAY NIGHT AND SATURDAY.

THE DES PLAINS RIVER NEAR RUSSELL MAY EXPERIENCE MINOR FLOODING
BEGINNING EARLY WEDNESDAY MORNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT HEAVY RAINFALL TOTALS TO THE
NATIONAL WEATHER SERVICE CHICAGO.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

LMZ740>745-081000-
WINTHROP HARBOR TO WILMETTE HARBOR-
WILMETTE HARBOR TO NORTHERLY ISLAND-
NORTHERLY ISLAND TO CALUMET HARBOR-CALUMET HARBOR TO GARY-
GARY TO BURNS HARBOR-BURNS HARBOR TO MICHIGAN CITY-
459 AM CDT MON MAY 7 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE
WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE
MICHIGAN.

.DAY ONE...TODAY AND TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS TODAY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS FRIDAY NIGHT AND SATURDAY.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-081000-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE
MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH
FOX ISLAND 5 NM OFFSHORE-
LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI-
LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE
TO MID LAKE-
LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO
MID LAKE-
459 AM CDT MON MAY 7 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE
MICHIGAN.

.DAY ONE...TODAY AND TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS TODAY ACROSS THE SOUTHERN HALF
OF THE LAKE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THERE IS A CHANCE OF THUNDERSTORMS TUESDAY NIGHT....AND A SLIGHT
CHANCE OF THUNDERSTORMS FRIDAY NIGHT AND SATURDAY.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

JEE

In the hours before

Local storm report, May 7, 2:34 AM CDT, 5 hours 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
234 AM CDT MON MAY 07 2012

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

0220 AM     FLASH FLOOD      KENTLAND                40.77N 87.45W
05/07/2012                   NEWTON             IN   LAW ENFORCEMENT

            1800S 700W IMPASSABLE AND CLOSED DUE TO FLOODING.

&&

RC
Local storm report, May 7, 3:17 AM CDT, 5 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
317 AM CDT MON MAY 07 2012

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

0220 AM     FLASH FLOOD      KENTLAND                40.77N 87.45W
05/07/2012                   NEWTON             IN   LAW ENFORCEMENT

            1800S 700W IMPASSABLE AND CLOSED DUE TO FLOODING.

0215 AM     FLASH FLOOD      HEBRON                  41.32N 87.20W
05/07/2012                   PORTER             IN   TRAINED SPOTTER

            SEVERAL ROADS IN HEBRON FLOODED AND IMPASSABLE. BOTH
            RETENTION PONDS OVERFLOWING. WATER APPROACHING BUILDINGS
            IN INDUSTRIAL PARK.

0214 AM     HEAVY RAIN       HEBRON                  41.32N 87.20W
05/07/2012  M4.60 INCH       PORTER             IN   TRAINED SPOTTER

            4.60 INCHES SINCE 1030 PM CDT.

0137 AM     HEAVY RAIN       HEBRON                  41.32N 87.20W
05/07/2012  M4.47 INCH       PORTER             IN   TRAINED SPOTTER

            4.47 INCHES SINCE 1030 PM CDT. 1.60 INCHES IN THE LAST 40
            MINUTES.

1257 AM     HEAVY RAIN       HEBRON                  41.32N 87.20W
05/07/2012  M2.87 INCH       PORTER             IN   TRAINED SPOTTER

            2.87 INCHES SINCE 1030 PM CDT. STILL RAINING VERY
            HEAVILY.

1250 AM     FLASH FLOOD      CROWN POINT             41.42N 87.36W
05/07/2012                   LAKE               IN   PUBLIC

            SIGNIFICANT STREET FLOODING. SEVERAL INCHES OF WATER
            FLOWING DOWN STREETS WITH MANHOLE COVERS OFF SPEWING
            WATER EVERYWHERE.

1250 AM     FLASH FLOOD      CEDAR LAKE              41.37N 87.44W
05/07/2012                   LAKE               IN   LAW ENFORCEMENT

            ROADS CLOSED DUE TO FLASH FLOODING. 133RD AVENUE HAS
            ABOUT 3.5 OF WATER COVERING ROAD...WITH 2.5 TO 3 FEET OF
            WATER COVERING LAKESHORE DRIVE.

1230 AM     FLASH FLOOD      3 SW MORRIS             41.34N 88.47W
05/07/2012                   GRUNDY             IL   LAW ENFORCEMENT

            WEST SOUTHMOR ROAD SOUTHWEST OF THE TOWN CENTER
            IMPASSABLE DUE TO FLOODING.

1144 PM     HAIL             MAZON                   41.24N 88.42W
05/06/2012  E0.25 INCH       GRUNDY             IL   TRAINED SPOTTER

1142 PM     HAIL             4 SW MORRIS             41.33N 88.48W
05/06/2012  E0.25 INCH       GRUNDY             IL   TRAINED SPOTTER

1104 PM     HAIL             STREATOR                41.13N 88.83W
05/06/2012  M1.00 INCH       LA SALLE           IL   TRAINED SPOTTER

1101 PM     HAIL             STREATOR                41.13N 88.83W
05/06/2012  E0.50 INCH       LA SALLE           IL   TRAINED SPOTTER

            DIME SIZE HAIL LASTED 3 MINUTES.

1057 PM     FLASH FLOOD      MARSEILLES              41.33N 88.69W
05/06/2012                   LA SALLE           IL   TRAINED SPOTTER

            RYALL STREET IMPASSABLE AND CLOSED DUE TO FLOODING. ABOUT
            2 FEET OF WATER COVERING ROAD...WITH RUNOFF CONTINUING
            DOWNHILL INTO AREA.

1055 PM     FLOOD            CEDAR LAKE              41.37N 87.44W
05/06/2012                   LAKE               IN   PUBLIC

            MODERATE STREET FLOODING.

1005 PM     HAIL             BEECHER                 41.35N 87.61W
05/06/2012  E0.50 INCH       WILL               IL   EMERGENCY MNGR

            DIME SIZE HAIL REPORTED BY BEECHER POLICE DEPARTMENT.

0702 PM     FLASH FLOOD      4 N FREELAND PARK       40.68N 87.49W
05/06/2012                   BENTON             IN   LAW ENFORCEMENT

            WATER COMPLETELY COVERING ROUTE 71 AT INTERSECTION OF
            500N.

0638 PM     FLASH FLOOD      5 WSW KENTLAND          40.74N 87.53W
05/06/2012                   BENTON             IN   TRAINED SPOTTER

            ROAD COMPLETELY WASHED OUT AT THE INTERSECTION OF 900N
            AND 1100W AT THE BENTON AND IROQUOIS COUNTY LINE. WATER
            UP TO THE HOOD OF CAR SPOTTER IS IN.

0600 PM     FLASH FLOOD      2 E WATSEKA             40.78N 87.69W
05/06/2012                   IROQUOIS           IL   EMERGENCY MNGR

            1730N ROAD BUCKLED WHICH IS NEAR RTE 1. THIS WAS
            POTENTIALLY DUE TO WATER. TIME IS OF REPORT. TIME OF ROAD
            BUCKLING UNKNOWN.

0558 PM     TSTM WND DMG     OTTERBEIN               40.49N 87.11W
05/06/2012                   BENTON             IN   LAW ENFORCEMENT

            DELAYED REPORT. TIME ESTIMATED FROM RADAR. 2 POWERPOLES
            DOWN AND A LARGE TREE LIMB ACROSS A ROAD.

0513 PM     HAIL             CISSNA PARK             40.57N 87.89W
05/06/2012  E0.25 INCH       IROQUOIS           IL   TRAINED SPOTTER

            EST WIND GUST 30 MPH. SMALL LIMBS DOWN.

0500 PM     TORNADO          3 E WATSEKA             40.77N 87.67W
05/06/2012                   IROQUOIS           IL   EMERGENCY MNGR

            DELAYED REPORT. TIME BASED OFF RADAR. POSSIBLE TORNADO.
            DAMAGE STARTED ON SE SIDE OF WATSEKA E OF RT 1 AND S OF
            RT 24. MULTIPLE TREES DOWN. SIDING RIPPED OFF BLDGS.
            SIGNS MANGLED. ON A PROPERTY ON CR 1730N...A 40X40 CINDER
            BLOCK BLDG WAS TORN APART...WITH CINDER BLOCKS TOSSED AND
            LIGHTER DEBRIS FROM BLDG TOSSED 1-1.5 MILES DOWNSTREAM TO
            THE NEXT PROPERTY. HERE...A HOUSE HAD WINDOWS BLOWN OUT
            AND A CAMPER INSIDE A GARAGE WAS IMPALED BY A BOARD.
            DAMAGE CONTINUED TO NEAR STATE LINE.

0455 PM     HAIL             CHATSWORTH              40.75N 88.29W
05/06/2012  M0.88 INCH       LIVINGSTON         IL   TRAINED SPOTTER

            PENNY TO NICKEL SIZE HAIL IN THE TOWN OF CHATSWORTH.

0445 PM     TSTM WND DMG     CRESCENT CITY           40.77N 87.86W
05/06/2012                   IROQUOIS           IL   TRAINED SPOTTER

            2 REPORTS RCVD - EAST OF CRESCENT CITY TO WATSEKA ALONG
            US 24. EST 60 POWER POLES BLOWN DOWN OVER RR TRACKS IN A
            3/4 TO 1 1/2 MILE SECTION. OTHER POLES WERE DAMAGED. TIME
            APPROX FROM 2140 UTC TO 2200 UTC

0435 PM     HEAVY RAIN       5 W WATSEKA             40.78N 87.83W
05/06/2012  E1.37 INCH       IROQUOIS           IL   COCORAHS

            1.37 INCHES IN 30 MINUTES. SOME WIND DAMAGE TO FARM
            BUILDING DUE TO STRAIGHT LINE WINDS.

0432 PM     HAIL             CAMPUS                  41.02N 88.31W
05/06/2012  M0.25 INCH       LIVINGSTON         IL   TRAINED SPOTTER

            PEA SIZE HAIL IN CAMPUS.

0415 PM     FLASH FLOOD      5 E WENONA              41.05N 88.96W
05/06/2012                   LA SALLE           IL   LAW ENFORCEMENT

            TWO FEET OF WATER OVER ILLINOIS HIGHWAY 17 NEAR THE LA
            SALLE AND LIVINGSTON COUNTY BORDERS.

0402 PM     HAIL             2 E DWIGHT              41.10N 88.39W
05/06/2012  E0.50 INCH       LIVINGSTON         IL   TRAINED SPOTTER

            ALONG RT 17 DIME SIZE HAIL.

0357 PM     FUNNEL CLOUD     STREATOR                41.13N 88.83W
05/06/2012                   LA SALLE           IL   PUBLIC

            LAW ENFORCEMENT RELAYED A PUBLIC REPORT OF A POSSIBLE
            FUNNEL VISIBLE FROM THE 1500 BLOCK OF SOUTH JEFFERSON.

0355 PM     FLASH FLOOD      4 SE STREATOR           41.08N 88.78W
05/06/2012                   LIVINGSTON         IL   LAW ENFORCEMENT

            WATER OVER MANY ROADWAYS IN NEW TOWN TOWNSHIP. THIS
            CONTINUES AS OF 7 PM.

0350 PM     TSTM WND GST     6 E WENONA              41.05N 88.94W
05/06/2012  M60.00 MPH       LIVINGSTON         IL   TRAINED SPOTTER

0350 PM     TORNADO          ASHKUM                  40.88N 87.95W
05/06/2012                   IROQUOIS           IL   PUBLIC

            SOUTH OF TOWN ALONG I-57 NEAR MILE MARKER 290.

0350 PM     FUNNEL CLOUD     2 NNE ASHKUM            40.91N 87.94W
05/06/2012                   IROQUOIS           IL   TRAINED SPOTTER

            SPOTTER REPORTED A LOW ROTATING WALL CLOUD WITH A
            POSSIBLE FUNNEL.

0350 PM     FUNNEL CLOUD     6 E WENONA              41.05N 88.94W
05/06/2012                   LIVINGSTON         IL   TRAINED SPOTTER

            FUNNEL WAS BECOMING RAIN-WRAPPED.

0339 PM     HAIL             CHEBANSE                41.00N 87.91W
05/06/2012  E0.25 INCH       IROQUOIS           IL   TRAINED SPOTTER

0335 PM     HAIL             CLIFTON                 40.94N 87.93W
05/06/2012  E2.75 INCH       IROQUOIS           IL   EMERGENCY MNGR

            EM RELAYED A PUBLIC REPORT OF BASEBALL SIZE HAIL.

0333 PM     HAIL             CHEBANSE                41.00N 87.91W
05/06/2012  M1.75 INCH       IROQUOIS           IL   TRAINED SPOTTER

0331 PM     HAIL             STREATOR                41.13N 88.83W
05/06/2012  M1.00 INCH       LA SALLE           IL   TRAINED SPOTTER

            IN TOWN.

0330 PM     HAIL             5 W WATSEKA             40.78N 87.83W
05/06/2012  E0.25 INCH       IROQUOIS           IL   COCORAHS

0329 PM     HAIL             SW CHEBANSE             41.00N 87.91W
05/06/2012  E0.50 INCH       IROQUOIS           IL   TRAINED SPOTTER

            DIME SIZE HAIL SW OF CHEBANSE.

0325 PM     HAIL             12 NW CLIFTON           41.06N 88.10W
05/06/2012  M1.75 INCH       KANKAKEE           IL   TRAINED SPOTTER

            APPROXIMATELY AT INTERSECTION OF 3200 NORTH AND 400 EAST
            IN NORTHWEST IROQUOIS COUNTY.

0320 PM     HAIL             13 NW CLIFTON           41.07N 88.11W
05/06/2012  M1.00 INCH       KANKAKEE           IL   TRAINED SPOTTER

            INTERSECTION OF COUNTY ROADS 3300 NORTH AND 400 EAST IN
            NORTHWEST IROQUOIS COUNTY.

0252 PM     HAIL             CHICAGO                 41.88N 87.63W
05/06/2012  E0.88 INCH       COOK               IL   TRAINED SPOTTER

            MIXED NICKEL AND DIME SIZE HAIL IN HUMBOLDT PARK.

0215 PM     HEAVY RAIN       FOX LAKE                42.42N 88.18W
05/06/2012  E1.70 INCH       LAKE               IL   PUBLIC

            STORM TOTAL OF 1.70 INCHES FROM THE MORNING RAINFALL.

0115 PM     HEAVY RAIN       WINTHROP HARBOR         42.48N 87.83W
05/06/2012  E1.08 INCH       LAKE               IL   COCORAHS

            1.08 INCHES IN 60 MINUTES.

0115 PM     HEAVY RAIN       2 E LAKEMOOR            42.34N 88.17W
05/06/2012  E1.12 INCH       LAKE               IL   COCORAHS

            2 MILES SE OF LAKEMOOR...OR 1 MILE SOUTH OF VOLO - 1.12
            INCHES IN 60 MINUTES.

0108 PM     HAIL             CRETE                   41.45N 87.62W
05/06/2012  E0.50 INCH       WILL               IL   TRAINED SPOTTER

            DIME-SIZED HAIL.

0100 PM     HEAVY RAIN       2 NNE GURNEE            42.40N 87.92W
05/06/2012  E0.81 INCH       LAKE               IL   COCORAHS

            0.81 OF AN INCH SO FAR WITH 0.21 IN 30 MINUTES.

0100 PM     HAIL             PARK FOREST             41.48N 87.69W
05/06/2012  E0.88 INCH       COOK               IL   PUBLIC

1250 PM     HEAVY RAIN       2 N WAUKEGAN            42.40N 87.87W
05/06/2012  E1.02 INCH       LAKE               IL   COCORAHS

            1.02 INCHES IN 40 MINUTES.

1249 PM     HEAVY RAIN       WAUKEGAN                42.37N 87.87W
05/06/2012  E0.62 INCH       LAKE               IL   TRAINED SPOTTER

            0.62 IN AN HOUR.

1245 PM     HAIL             MONEE                   41.42N 87.75W
05/06/2012  E0.25 INCH       WILL               IL   TRAINED SPOTTER

1130 AM     HAIL             FOX RIVER GROVE         42.20N 88.22W
05/06/2012  E0.25 INCH       MCHENRY            IL   TRAINED SPOTTER

            SMALLER THAN PEA SIZE HAIL. SOME ROTATION. HEAVY CLOUD TO
            GROUND LIGHTNING.

1120 AM     HAIL             MONTGOMERY              41.73N 88.34W
05/06/2012  E0.25 INCH       KANE               IL   BROADCAST MEDIA

            VIEWER REPORT.

1115 AM     HEAVY RAIN       4 NE LISBON             41.52N 88.43W
05/06/2012  E0.85 INCH       KENDALL            IL   COCORAHS

            0.85 INCH IN 20 MINUTES.

1114 AM     HAIL             2 ESE MONTGOMERY        41.72N 88.31W
05/06/2012  E0.25 INCH       KENDALL            IL   TRAINED SPOTTER

            PEA SIZED HAIL AT DICKSON AND GALENA ROADS JUST NORTH OF
            BRISTOL IL.

1110 AM     HAIL             4 W HUNTLEY             42.17N 88.50W
05/06/2012  E0.50 INCH       MCHENRY            IL   COCORAHS

1110 AM     HAIL             SUGAR GROVE             41.77N 88.46W
05/06/2012  E0.25 INCH       KANE               IL   TRAINED SPOTTER

            2 MILES SW OF AURORA AIRPORT.

1104 AM     HAIL             4 NE LISBON             41.52N 88.43W
05/06/2012  E0.75 INCH       KENDALL            IL   COCORAHS

1040 AM     HAIL             BELVIDERE               42.25N 88.85W
05/06/2012  E1.00 INCH       BOONE              IL   PUBLIC

1025 AM     HAIL             BELVIDERE               42.25N 88.85W
05/06/2012  E0.50 INCH       BOONE              IL   BROADCAST MEDIA

            DIME SIZED HAIL REPORTED BY VIEWER.

1025 AM     HAIL             BELVIDERE               42.25N 88.85W
05/06/2012  E1.00 INCH       BOONE              IL   COCORAHS

            MOSTLY PEA AND SLIGHTLY LARGER - SOME NICKEL-SIZED AND A
            FEW QUARTER-SIZED.

&&

RC
Local storm report, May 7, 7:30 AM CDT, 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
730 AM CDT MON MAY 07 2012

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

0645 AM     FLASH FLOOD      CABERY                  40.99N 88.20W
05/07/2012                   FORD               IL   LAW ENFORCEMENT

            HIGH WATER ON RT. 115 NEAR CABERY. START TIME OF FLOODING
            UNKNOWN.

&&

MDB
Local storm report, May 7, 7:37 AM CDT, 41 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
737 AM CDT MON MAY 07 2012

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

0645 AM     FLASH FLOOD      WILMINGTON              41.30N 88.16W
05/07/2012                   WILL               IL   LAW ENFORCEMENT

            HIGH WATER ON CHICAGO ROAD AND WILMINGTON-PEOTONE ROAD.
            TIME OF FLOODING UNKNOWN.

&&

MDB
Local storm report, May 7, 7:43 AM CDT, 35 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
743 AM CDT MON MAY 07 2012

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

0645 AM     FLASH FLOOD      4 NW HEBRON             41.36N 87.26W
05/07/2012                   LAKE               IN   LAW ENFORCEMENT

            U.S. 231 FLOODED/IMPASSABLE NEAR LEROY. SEVERAL OTHER
            MAJOR AND MINOR ROADS FLOODED AND IMPASSABLE ACROSS
            SOUTHERN PORTER COUNTY. START TIME OF FLOODING UNKNOWN.

&&

MDB
Local storm report, May 7, 7:46 AM CDT, 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
746 AM CDT MON MAY 07 2012

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

0645 AM     FLASH FLOOD      1 S KENTLAND            40.76N 87.45W
05/07/2012                   NEWTON             IN   LAW ENFORCEMENT

            U.S. 41 CLOSED NEAR 1700S. START TIME OF FLOODING
            UNKNOWN.

&&

MDB

The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 6, 9:01 PM CDTSpecial Weather StatementLOTCook59 min
May 6, 9:23 PM CDTRiver Flood WatchLOTLake13 hr
May 6, 9:40 PM CDTRiver Flood AdvisoryLOTWill24 hr
May 6, 9:40 PM CDTRiver Flood AdvisoryLOTIroquois67 hr
May 6, 9:55 PM CDTSevere Thunderstorm WarningLOTGrundy, Kankakee, Will50 min
May 6, 10:32 PM CDTSpecial Weather StatementLOTCook43 min
May 6, 10:35 PM CDTSpecial Weather StatementLOTCook40 min
May 6, 10:58 PM CDTAreal Flood AdvisoryLOTDeKalb, LaSalle, Lee6 hr
May 6, 11:09 PM CDTSpecial Weather StatementLOTGrundy36 min
May 6, 11:22 PM CDTFlash Flood WarningLOTGrundy, Kendall, LaSalle, Livingston8 hr
May 6, 11:24 PM CDTFlash Flood WarningLOTCook, Grundy, Kankakee, Kendall, Will6 hr
May 7, 12:26 AM CDTFlash Flood WarningLOTFord, Iroquois, Kankakee7 hr
May 7, 1:43 AM CDTFlash Flood WarningLOTIroquois6 hr
May 7, 2:02 AM CDTRiver Flood AdvisoryLOTKane, Kendall8 hr
May 7, 3:56 AM CDTFlash Flood WarningLOTFord, Livingston4 hr
May 7, 5:05 AM CDTAreal Flood AdvisoryLOTDeKalb, LaSalle, Lee2 hr
May 7, 5:42 AM CDTAreal Flood WarningLOTGrundy, Kankakee, Will12 hr
May 7, 6:15 AM CDTRiver Flood WarningLOTBureau, LaSalle5 days
May 7, 6:23 AM CDTRiver Flood AdvisoryLOTGrundy16 hr
May 7, 6:23 AM CDTRiver Flood AdvisoryLOTLaSalle16 hr
May 7, 7:00 AM CDTAreal Flood WarningLOTFord, Grundy, Iroquois, Kankakee, LaSalle, Livingston22 hr
May 7, 10:06 AM CDTRiver Flood AdvisoryLOTGrundy, Will68 hr
May 7, 10:06 AM CDTRiver Flood AdvisoryLOTGrundy8 hr
May 7, 3:36 PM CDTRiver Flood AdvisoryLOTIroquois7 hr
May 7, 5:30 PM CDTRiver Flood WarningLOTGrundy28 hr
May 7, 5:31 PM CDTAreal Flood WarningLOTGrundy, Kankakee, Will12 hr

Nearby

River Flood Warnings in Illinois, 2012Every river flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.