Flash Flood and Flooding in Indiana, June 23, 2010

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
506 PM CDT WED JUN 23 2010

.MESOSCALE DISCUSSION...
420 PM CDT

VISIBLE SATELLITE IMAGERY INDICATING THE CAP THAT HAD DEVELOPED
EARLIER IS RAPIDLY WEAKENING OR BEING OVERCOME BY THE WARMTH AT THE
SFC...NOTED IN THE INCREASING CUMULUS FIELD ACROSS NORTHERN IL. LLVL
FLOW HAS STRENGTHENED WITH MANY LOCATIONS AT 21Z INDICATING GUSTY
SFC WINDS BETWEEN 18-25KTS. MUCH OF THE REGION REMAINS VERY MOIST
WITH DEW PTS IN THE LOW/MID 70S ACROSS CENTRAL IL/IN. DEEP LAYER
MOISTURE FLUX CONVERGENCE IS NOTED FROM THE STORM PREDICTION CENTER
MESOANALYSIS PAGE ALONG THE BOUNDARY...WHICH IS CURRENTLY LOCATED
ACROSS CENTRAL KANSAS STRETCHING NORTHEAST THROUGH SOUTHERN
WISCONSIN.

THE FOCUS FOR THE AFTERNOON CONVECTION DEVELOPMENT REMAINS WITH
DAMAGING WINDS...HOWEVER WITH LCL HEIGHTS BELOW 2KFT AGL AND
PROXIMITY OF NUMEROUS LLVL BOUNDARIES...HELICITY AND ROTATING
UPDRAFTS OR ISOLATED TORNADOES ARE STILL POSSIBLE. THE 0-6KM BULK
SHEAR VALUES REMAIN PEGGED BTWN 40-50KTS FROM LATEST RUC
ANALYSIS...WITH A FEW POCKETS OF 50-60KTS. 850MB WINDS FROM 20Z
CYCLE OF THE RUC CONTINUE TO INDICATE NEARLY 50KTS OF UNIDIRECTIONAL
WIND FROM SW TO NE. CONVECTION HAS BEGUN TO REALIZE THE DIMINISHING
CAP AND ABUNDANT ENERGY IN THE BOUNDARY LAYER...COUPLED WITH THE
DEEP LAYER SHEAR AND IMPRESSIVE WIND FIELDS BLO 500MB...THE CONCERN
IS ALSO FOR THE DEVELOPMENT OF FAST MOVING LINE OF CONVECTION OR
BOWS. IN ADDITION IT CAN/T BE RULED OUT FOR THE POTENTIAL OF A
DERECHO. DESPITE THE DEEP LAYER SHEAR AND POTENTIAL THAT UPDRAFTS
COULD BECOME SHEARED...THERE IS ALSO A THREAT FOR LARGE HAIL OF
GOLFBALLS OR LARGER.

THE FLOODING THREAT REMAINS VERY HIGH AS WELL WITH VERY MOIST OR
SATURATED SOILS FROM FREQUENT ROUNDS OF CONVECTION OVER THE PAST
SEVERAL DAYS...INCLUDING EARLIER TODAY. FLASH FLOOD GUIDANCE REMAINS
VERY LOW OR IN SOME LOCATIONS LESS THAN ONE HALF INCH...THUS ANY
PRECIPITATION COULD SPAWN LOCALIZED FLOODING. PWAT VALUES REMAIN
ELEVATED IN THE 2 TO 3 STD DEV ABOVE NORMAL OR NEARLY 2.00 INCHES.
BRIEF HEAVY DOWNPOURS ARE POSSIBLE FROM THE LATE AFTERNOON
CONVECTION FOR PORTIONS OF NORTHERN IL.

&&

.DISCUSSION...
227 PM CDT

MAIN FORECAST CONCERN IS ON SEVERE POTENTIAL LATE THIS AFTERNOON
INTO THIS EVENING. PLEASE REFER TO THE ABOVE MESOSCALE DISCUSSION
FOR MORE INFORMATION ON THE SEVERE POTENTIAL THIS AFTERNOON INTO
TONIGHT. GENERALLY QUIET WEATHER EXPECTED FOR THURSDAY AND MOST
OF FRIDAY...WITH FOCUS THEN SHIFTING TO ADDITIONAL CHANCES OF
SHOWERS AND THUNDERSTORMS FOR THE WEEKEND.

SHOWERS AND THUNDERSTORMS WILL EXIT SOUTHEAST PORTIONS OF FORECAST
AREA LATE THIS EVENING. UPPER LEVEL SHORT WAVE RESPONSIBLE FOR
ENHANCING CONVECTION THIS EVENING WILL ALSO BE TRACKING INTO THE
OHIO RIVER VALLEY AND NORTHEAST UNITED STATES ON THURSDAY WITH
FAIRLY STRONG MID LEVEL SUBSIDENCE BECOMING ESTABLISHED ACROSS THE
AREA. BY FRIDAY NIGHT...LOW LEVEL RIDGE AXIS WILL BE SHIFTING EAST
OF THE AREA SETTING UP SOUTHWEST LOW LEVEL WARM ADVECTION ONCE
AGAIN AND A POTENTIAL OF ELEVATED CONVECTION MAINLY ACROSS
NORTHERN PORTIONS OF THE FORECAST AREA. NAM/GFS ARE IN GENERAL
AGREEMENT IN ANOTHER SHORT WAVE MOVING ACROSS THE NORTHERN GREAT
LAKES REGION THAT WILL ALLOW A WEST TO EAST BOUNDARY TO DROP
SOUTHWARD ACROSS THE GREAT LAKES REGION ON SATURDAY POSSIBLY
REACHING FAR SOUTHERN LAKE MICHIGAN BY SATURDAY NIGHT. VERY WARM
DAY IN STORE FOR SATURDAY AS FORECAST AREA REMAINS SOUTH OF THIS
BOUNDARY...AND 850 HPA TEMPS INCREASE INTO THE +20 TO +22 DEG
RANGE. HEAT INDICES LIKELY TO APPROACH 100 DEGREES ON SATURDAY DUE
TO THE COMBINATION OF DEW POINTS RISING BACK INTO THE LOWER 70S
AND HIGH TEMPERATURES FORECASTED IN THE LOWER TO MID 90S. A MORE
AMPLIFIED UPPER LEVEL TROUGH EXPECTED TO PROGRESS THROUGH
PROGRESSIVE NORTHERN TIER OF STATES FLOW PATTERN ON SUNDAY WITH
ANOTHER ASSOCIATED COLD FRONTAL PASSAGE EXPECTED ON SUNDAY.

CONDITIONS SHOULD DRY OUT ONCE AGAIN LATE SUNDAY AS THIS FRONT
MOVES THROUGH SETTING UP A FAIRLY QUIET BEGINNING TO NEXT WORK
WEEK. HAVE KEPT REMAINDER OF FORECAST DRY AT THIS TIME WITH RISING
UPPER HEIGHTS THROUGH THIS PERIOD AS AMPLIFIED UPPER RIDGE ACROSS
WESTERN CONUS SLOWLY SHIFTS EASTWARD. HAVE NOT MADE MANY CHANGES
TO DAY 6/7 PERIOD AT THIS TIME WITH DIMINISHING CONFIDENCE IN THE
HANDLING OF UPPER LOW DROPPING SOUTHWARD ACROSS EASTERN CANADA.
12Z ECMWF IS MORE AGGRESSIVE IN DROPPING THIS LOW SOUTHWARD INTO
EASTERN GREAT LAKES REGION BY MID WEEK. NOT MUCH CONFIDENCE IN
THIS ECMWF SOLUTION...AND HAVE SIDED WITH MORE OF A OPERATIONAL
GFS/NCEP ENSEMBLE MEAN IDEA OF A FURTHER NORTH POSITIONING OF THIS
UPPER LOW. GREATER POTENTIAL OF RETURN OF HUMID AND HOT CONDITIONS
EXPECTED FOR BEYOND DAY 7 PERIOD AS UPPER RIDGE SHOULD EVENTUALLY
SHIFT EASTWARD OVER GREAT LAKES REGION.

MARSILI

&&

.AVIATION...

//ORD AND MDW CONCERNS...UPDATED 22Z...

PRIMARY CONCERN REMAINS CONVECTION THROUGH EARLY/MID EVENING. CMS

//DISCUSSION...UPDATED 22Z...

CLUSTERS OF THUNDERSTORMS CONTINUE TO DEVELOP FROM NORTHWEST IL
SOUTHWEST INTO NORTHERN MISSOURI. NEW THUNDERSTORMS DEVELOPING
FURTHER EAST AND IMPACTING DPA/ORD. HAVE HIT THE TEMPOS HARDER
WITH GUSTS TO 45 KTS...POSSIBLY LOCALLY HIGHER. WILL WATCH TRENDS
AND AMEND AS NEEDED. BACK EDGE OF ACTIVITY SHOULD BE PASSING EAST
OF ORD/MDW BY 01Z OR SO. CMS

PREVIOUS DISCUSSION FROM 18Z...

ATMOSPHERE IN STATE OF FLUX ATTM AS COOL/STABLE BOUNDARY LAYER AIR
LEFT IN WAKE OF EARLIER CONVECTIVE COMPLEX IS IN THE PROCESS OF
RECOVERING. CURRENT VIS SATLT IMAGERY SHOWS RESIDUAL CONVECTIVE
DEBRIS DISSIPATING RAPIDLY AND SWLY LOW LVL FLOW INCRG IN RESPONSE
TO RAPID PRESSURE FALLS NOW OCCURRING FROM ERN IA-NWRN IL. THIS IS
ALLOWING QUICK RETURN OF DEEP TROPICAL AIR AHEAD OF APCHG COLD
FRONT. LATEST SPC MESO ANALYSES SHOW AIR OVER CNTRL/ERN IA...NRN
MO AND FAR W CNTRL IL DESTABILIZING RAPIDLY WITH SFC DEW POINTS
NEAR 80 DEG POOLING OVER SERN IA. IN ADDITION...WATER VAPOR IMAGERY
SUGGESTS SIGNIFICANT SUBSIDENCE AND DRYING IS OCCURRING BHD FRONT
FROM WRN MN-NW IA/ERN NEB. GUSTY NW WINDS IN THIS AREA SUPPORT
THIS AS WELL. THIS MEANS THAT IN ADDITION TO GROWING
INSTABILITY...ATMOSPHERE FROM UPR MS VALLEY THROUGH THE SRN GRTLKS
REGION IS BECOMING QUITE DYNAMIC.

TO SUMMARIZE ALL THIS...WX TO REMAIN QUIET THOUGH ABOUT 19Z...AS
AIR MASS CONTINUES TO RECOVER FROM EARLIER STORMS. BEGINNING
AROUND 20Z TS ARE EXPECTED TO ERUPT AHD OF ADVANCING COLD
FRONT...FROM NRN IL SWWD INTO MO. THESE STORMS SHOULD THEN RAPIDLY
BECOME SVR AFT 20Z...AND FORM INTO A SQLN FROM NR GYY-PNT-PIA BY
23Z.

STORMS TO ACCELERATE EWD OUT OF AREA ERLY THIS EVENING BHD BOWING
SQLN. BY 06Z...AREA TO BE OVERSPREAD BY MODEST NWLY WINDS AND ASSD
DRYING/STABILIZATION. THIS WILL BE THE BEGINNING OF AN EXTENDED
PERIOD OF VFR CONDITIONS WITH NIL WX.

MERZLOCK

//ORD AND MDW CONFIDENCE...UPDATED 22Z...

HIGH CONFIDENCE ON CONVECTION/TIMING THRU EARLY EVENING. CMS

//OUTLOOK FOR ORD/MDW FOR 06Z FRIDAY-12Z TUESDAY...UPDATED 18Z...

THURSDAY NIGHT...VFR.
FRIDAY...VFR.
SATURDAY...CHC TS...OTRW VFR.
SUNDAY...CHC TS...OTRW VFR.
MONDAY...VFR.
TUESDAY...VFR.

MERZLOCK

&&

.MARINE...
259 PM CDT

TROUGH OF LOW PRESSURE CURRENTLY STRETCHING FROM SOUTHERN QUEBEC
SOUTH THROUGH WISCONSIN...AND DOWN INTO NW MISSOURI...CONTINUES TO
SHIFT EAST. THIS TROUGH WILL MOVE THROUGH AND GRADUALLY BEYOND THE
LAKES LATER TONIGHT AND INTO TOMORROW. RAPID PRESSURE FALLS HAVE
KEPT WINDS UP AND AROUND SMALL CRAFT LEVELS FOR THE NEAR SHORE...AND
OCCASIONALLY GUSTING INTO THE 30 KT RANGE ACROSS THE SOUTHERN OPEN
LAKE. EXPECT THESE WINDS TO CONTINUE THROUGH THE EVENING HOURS
BEFORE VEERING AROUND TO THE NORTHWEST AS A COLD FRONT SWEEPS
THROUGH THE LAKE. OPTED TO KEEP THE SMALL CRAFT ADVISORY GOING THE
MORNING HOURS...AS A FAIR AMOUNT OF SUBSIDENCE SETTLES IN AND
THINK THE WINDS WILL REMAIN GUSTY THROUGH THE EARLY MORNING HOURS.
HIGH PRESSURE WILL THEN SETTLE IN ACROSS THE LAKES...REACHING THE
CENTRAL LAKES BY THURSDAY. AS HIGH PRESSURE SITS OVERHEAD...EXPECT
RELATIVELY LIGHT FLOW BEFORE THE HIGH SLIDES OFF TO THE EAST
FRIDAY AND SOUTHERLY WINDS ARRIVE BACK INTO THE AREA.

SHEA

&&

.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 1 AM THURSDAY.

IN...FLASH FLOOD WATCH...INZ001-INZ002-INZ010-INZ011-INZ019 UNTIL 1
     AM THURSDAY.

LM...SMALL CRAFT ADVISORY...NEARSHORE WATERS UNTIL 7 AM THURSDAY.

&&

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
445 PM CDT WED JUN 23 2010

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
242145-
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-
445 PM CDT WED JUN 23 2010 /545 PM EDT WED JUN 23 2010/

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

.DAY ONE...TONIGHT.

  WEATHER HAZARDS EXPECTED:

  THUNDERSTORMS...SOME COULD PRODUCE:

  DAMAGING WINDS IN EXCESS OF 80 MPH.
  HAIL TO THE SIZE OF GOLF BALLS.
  ISOLATED TORNADOES.
  HEAVY RAINFALL...WITH LOCALIZED FLASH FLOODING.

  AREAS AFFECTED AND TIMING:

  THUNDERSTORMS...SOME SEVERE...HAVE BEGUN TO MOVE INTO NORTH
  CENTRAL ILLINOIS LATE THIS AFTERNOON...AND ARE EXPECTED TO MOVE
  INTO THE CHICAGO METRO AREA SOUTHWEST TO LIVINGSTON AND LA SALLE
  COUNTY BETWEEN 5 PM AND 8 PM...THEN INTO NORTHWEST INDIANA AND
  EAST CENTRAL ILLINOIS INCLUDING IROQUOIS COUNTY BETWEEN 6 PM AND
  9 PM CDT.

  DISCUSSION:

  THE ATMOSPHERE CONTINUES TO DESTABILIZE AHEAD OF A COLD FRONT
  MOVING THROUGH THE REGION THIS EVENING. THUNDERSTORMS HAVE
  ALREADY DEVELOPED OVER PARTS OF IOWA AND ARE MOVING INTO NORTH
  CENTRAL ILLINOIS AT THIS HOUR. SEVERE WINDS...LARGE HAIL AND
  FUNNEL CLOUDS HAVE ALREADY BEEN REPORTED FROM THESE STORMS AS
  THEY MOVED ACROSS EASTERN IOWA...AND THE THREAT OF SEVERE
  WEATHER WILL PERSIST AS THEY CONTINUE TO MOVE ACROSS NORTHERN
  ILLINOIS AND NORTHWESTERN INDIANA.

  WINDS ALOFT ARE UNSEASONABLY STRONG...WHICH GIVEN THE
  INCREASINGLY UNSTABLE AIR MASS IS RESULTING IN AN EXTREMELY
  VOLATILE AND POTENTIALLY DANGEROUS SITUATION. INITIALLY THE
  THREAT WITH THE THUNDERSTORMS WILL BE VERY LARGE HAIL...LOCALLY
  DAMAGING WINDS...ALONG WITH SOME POTENTIAL FOR TORNADOES. AS
  THE STORMS MOVE EAST INTO EASTERN ILLINOIS AND NORTHWEST INDIANA
  IT APPEARS QUITE POSSIBLE THAT THEY WILL EVOLVE INTO A FAST
  MOVING LINE WITH THE POTENTIAL INCREASING FOR WIDESPREAD
  DAMAGING WINDS...SOME POSSIBLY QUITE SIGNIFICANT WITH GUSTS IN
  EXCESS OF 80 MPH.

  IN ADDITION TO SEVERE WEATHER...THE VERY WARM AND MOIST
  CONDITIONS WILL RESULT IN THESE STORMS PRODUCING LOCALLY HEAVY
  RAINFALL. THIS COULD LEAD TO FLOODING...AS THE GROUND REMAINS
  WET FROM REPEATED PERIODS OF HEAVY RAINFALL OVER THE PAST
  SEVERAL DAYS.

  HEAT INDEX VALUES MAY APPROACH 100 DEGREES LATE THIS AFTERNOON
  MAINLY SOUTH OF INTERSTATE 80.

  PORTIONS OF THE ILLINOIS RIVER...AND SUGAR CREEK...WILL REMAIN
  IN FLOOD.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

  THERE IS A CHANCE OF THUNDERSTORMS SATURDAY THROUGH SUNDAY
  NIGHT.

  HOT AND HUMID WEATHER MAY PRODUCE HEAT INDEX VALUES NEAR 100
  DEGREES SATURDAY AND SUNDAY.

.SPOTTER INFORMATION STATEMENT...

  SPOTTERS WILL BE NEEDED LATER THIS AFTERNOON AND EVENING.

&&

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

LMZ740>745-242145-
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-
445 PM CDT WED JUN 23 2010

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

.DAY ONE...TONIGHT.

SEVERE THUNDERSTORMS ARE LIKELY LATE THIS AFTERNOON INTO THIS
EVENING. THESE STORMS MAY PRODUCE WINDS IN EXCESS OF 60 KNOTS AND
CLOUD TO WATER LIGHTNING.

HAZARDOUS WINDS FOR SMALL CRAFT ARE LIKELY THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THERE IS A CHANCE OF THUNDERSTORMS SATURDAY THROUGH SUNDAY NIGHT.

&&

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-
870-872-874-876-878-242145-
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 TOW 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-
445 PM CDT WED JUN 23 2010

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

.DAY ONE...TONIGHT.

SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND THIS
EVENING. STORMS MAY PRODUCE WIND GUSTS IN EXCESS OF 50 KNOTS AND
CLOUD TO WATER LIGHTNING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THERE IS A CHANCE OF THUNDERSTORMS FROM FRIDAY NIGHT THROUGH
SUNDAY NIGHT.

&&

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

BMD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
629 PM CDT WED JUN 23 2010

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

0605 PM     TSTM WND DMG     PLANO                   41.66N 88.53W
06/23/2010                   KENDALL            IL   TRAINED SPOTTER

            PART OF ROOF OFF HOUSE ON RIVER RD. NUMEROUS TREES
            FLATTENED. TREE HIT CAR WITH POSSIBLE INJURIES.

&&

ALYZA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
631 PM CDT WED JUN 23 2010

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

0624 PM     TSTM WND GST     MIDWAY AIRPORT          41.78N 87.75W
06/23/2010  M73.00 MPH       COOK               IL   ASOS

            MEASURED GUST TO 73 MPH AT MIDWAY AIRPORT.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
632 PM CDT WED JUN 23 2010

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

0622 PM     TSTM WND GST     CHICAGO                 41.88N 87.63W
06/23/2010  E75 MPH          COOK               IL   TRAINED SPOTTER

            NEAR MIDWAY AIRPORT.

&&

ALYZA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
633 PM CDT WED JUN 23 2010

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

0621 PM     TSTM WND GST     CHICAGO                 41.88N 87.63W
06/23/2010  E60 MPH          COOK               IL   TRAINED SPOTTER

            TREES LEANING 40 DEGREES. ESTIMATED 60MPH.

&&

ALYZA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
635 PM CDT WED JUN 23 2010

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

0625 PM     TSTM WND DMG     S NAPERVILLE            41.76N 88.15W
06/23/2010                   DUPAGE             IL   TRAINED SPOTTER

            STREET LIGHT DOWN ON MONTGOMERY RD. JUST E OF FARNSWORTH
            RD. BRANCHES DOWN.

&&

ALYZA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
645 PM CDT WED JUN 23 2010

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

0600 PM     TSTM WND GST     NORTH RIVERSIDE         41.85N 87.82W
06/23/2010  E60 MPH          COOK               IL   TRAINED SPOTTER

            TIME ESTIMATED. POWER IS OUT.

0600 PM     FLOOD            NORTH RIVERSIDE         41.85N 87.82W
06/23/2010                   COOK               IL   TRAINED SPOTTER

            9 INCHES OF STANDING WATER MEASURED ON IL. 171 BETWEEN
            22ND/CERMAK AND 26TH ST.

&&

ALYZA