Hail in Illinois, August 7, 2013

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
215 PM CDT WED AUG 7 2013

.MESOSCALE DISCUSSION...
215 PM CDT

SCATTERED STORMS HAVE SPROUTED ACROSS THE REGION WITH HEAVY RAIN
BEING THE MAIN THREAT THUS FAR. GOT ONE REPORT IN FROM LA SALLE
COUNTY OF 1.2 INCHES OF RAIN IN 40 MINUTES SO KEEPING AN EYE ON
HEAVY RAIN AND POSSIBLE FLASH FLOODING AS WELL AS SEVERE WEATHER
THIS AFTERNOON.  PWAT VALUES ARE 1.5-1.7 ACROSS THE CWA AND DO NOT
FORESEE THE PWAT VALUES DIMINISHING UNTIL THE FRONT MOVES THROUGH
THE REGION. SPEAKING OF THE FRONT IT IS CURRENTLY FROM NORTHERN
MICHIGAN THROUGH MUNDELEIN TO DE KALB TO AMBOY AND SLOWLY SLIDING
SOUTHEAST.  BETWEEN THE LAKE BREEZE AND OTHER VARIOUS OUTFLOW
BOUNDARIES...THE CONVECTIVE SITUATION IS MESSY AT BEST AND WILL
MONITOR THE BOUNDARY INTERACTIONS FOR ADDITIONAL CONVECTIVE
DEVELOPMENT.

LAPS INDICATES CAPE VALUES RANGE FROM 2500+ J/KG AHEAD OF THE FRONT
TO 3500+ J/KG SOUTH OF I-80.  SHEAR REMAINS WEAK THOUGH WITH 5 TO 10
KT OF 0-1 KM SHEAR AND 20-30 KT OF 0-6KM SHEAR.  SOUNDINGS FEATURE A
DRY SURFACE LAYER THROUGH 3500 FT WITH A MOIST LAYER THROUGH 9000
FT.  WITH LONG SKINNY CAPE AND A MOIST LAYER...SEVERE HAIL WILL BE
PROBABLY BE ISOLATED AT BEST AND ASSOCIATED WITH THE STRONGEST
STORMS.  HOWEVER THE DRY LOW LEVELS AND HIGH PWAT VALUES SUGGEST
DOWNBURSTS AND DAMAGING WINDS ARE STILL A THREAT.  LATEST RAP
ANALYSIS HAD 1000-1300 J/KG OF DCAPE.

EXPECTING CONTINUED SCATTERED STORM DEVELOPMENT ALONG CONVECTIVE
BOUNDARIES AND THE FRONT THROUGH THIS AFTERNOON WITH HEAVY RAIN AND
DAMAGING WINDS BEING THE MAIN THREATS.  ISOLATED SEVERE HAIL IS
POSSIBLE...BUT LESS OF A CONCERN.

JEE

&&

.DISCUSSION...
335 AM CDT

THE FOCUS OF THE FORECAST WAS ON THIS AFTERNOON WITH POTENTIAL
CONVECTIVE REDEVELOPMENT ALONG THE COOL FRONT.

THE LARGE UPPER LOW OVER NORTHWEST ONTARIO WILL MOVE LITTLE
THROUGH THE NEXT 24 HOURS BUT A STRONG 110 KT+ JET PROGRESSING
EAST AROUND ITS BASE WILL OWE TO SURFACE LOW PRESSURE MOVING
NORTHEAST ACROSS LAKE SUPERIOR AND INTO EASTERN QUEBEC...WHICH
WILL EASE A COOL FRONT INTO THE AREA. THIS FEATURE LOOKS TO BE
NEAR CHICAGO TO BLOOMINGTON EARLY THIS AFTERNOON. WITH LIMITED
EARLY MORNING STORMS...THE ATMOSPHERE LOOKS TO REMAIN UNSTABLE
ENOUGH THAT AS CONVERGENCE INCREASES AHEAD OF AND ALONG THE
BOUNDARY THAT SCATTERED STORMS MAY DEVELOP...EVEN AS EARLY AS LATE
MORNING/EARLY AFTERNOON. ITS POSSIBLE A LAKE BREEZE DEVELOPS
SOMEWHAT EARLIER THAN PRESENTLY FORECAST...EVEN POTENTIALLY IN
ADVANCE OF THE FRONT...WHICH WOULD SERVE AS A FOCUS TOO. THE
PLUME OF LOW TO POSSIBLY EVEN MID 70S DEW POINTS IS WELL AGREED
OPEN BY MODELS/MOS AND CONTRIBUTES TO FORECAST MLCAPE IN EXCESS OF
2000 J/KG. WITH THE MID AND UPPER JETS EASING THEIR THE DEEP LAYER
SHEAR WILL REMAIN SUFFICIENT FOR ORGANIZED CONVECTION ALONG THE
BOUNDARY. INHIBITION LOOKS TO BE A LIMITED ISSUE WITH THE SYSTEM
DRY SLOT HAVING WORKED OVERHEAD WITH SLIGHTLY COOLER 800MB AND
HIGHER TEMPS. ONCE AGAIN THOUGH CONVECTIVE CLUSTERS ACROSS MO LOOK
TO CONTINUE...SO THE DEEP MOISTURE TRANSPORT MAY REMAIN
INTERCEPTED HOLDING SOME OF OUR CONVECTIVE THREAT BACK. A MAJORITY
OF CONVECTIVE ALLOWING GUIDANCE DOES DEVELOP SOME ISOLATED
CONVECTION WITH THE FRONT...AND THAT CAN BE SEEN WITH SPC SSEO
MEMBERS AS WELL. SO HAVE BOOSTED POPS SOME THIS AFTERNOON FROM
BASICALLY INTERSTATE 55 EASTWARD. MULTICELL CLUSTERS CAPABLE OF A
HAIL AND WIND THREAT WOULD BE POSSIBLE.

CONFIDENCE...MEDIUM.

TEMPERATURES TODAY WILL BEGIN FROM A WARM SPRINGBOARD. MID 80S
LOOK PLAUSIBLE IN MOST AREAS PER LOCAL CLIMATOLOGY AND WITH THE
SLOWER FRONT ARRIVAL. EVEN BEHIND THE FRONT COOL AIR ADVECTION
DOES NOT LOOK TO SETTLE IN UNTIL THIS EVE. WINDS DO LOOK TO TURN
OFF THE LAKE AT SOME POINT THIS AFTERNOON. WHILE THE PRESENT
THINKING IS THAT WILL OCCUR LATE ENOUGH THAT IT WOULD NOT IMPACT
PEAK HEATING TIME...IT MAY END UP SHIFTING EARLIER DEPENDING ON
HOW STRONG SOUTHWEST WINDS ARE AHEAD OF THE SURFACE TROUGH.

CONFIDENCE...MEDIUM.

THE UPPER LOW WILL BEGIN TO DRIFT EAST ON THURSDAY AND THE SURFACE
FRONT LOOKS TO GET DRAPED FROM WEST-TO-EAST NEAR THE OHIO RIVER
VALLEY. MULTIPLE WAVES ARE FORECAST TO RIDE ALONG THIS WHICH
CERTAINLY SEEM REASONABLE WITH THE AGITATED PATTERN THAT HAS
RECENTLY BEEN SEEN ON THE NORTH PERIPHERY OF THE UPPER RIDGE
ACROSS KS/OK/AR/MO. GUIDANCE VARIES ON HOW FAR NORTH THE RETURN
FLOW ALOFT WILL MAKE IT. THE EC HAS BEEN CONSISTENTLY SOUTH WHILE
THE GFS FURTHER NORTH AND BRINGING RAIN CHANCES INTO THE CENTRAL
CWA. EVEN THOUGH THE GFS HAS BEEN FURTHER NORTH...ITS LOW-LEVEL
RETURN FLOW AT 850MB IS SOMEWHAT WEAK...AND IT WOULD LOOK LIKE
MOST OF THE PRECIP...CERTAINLY THE APPRECIABLE AMOUNTS...WOULD BE
SOUTH OF THE CWA. SO HAVE LEANED MORE TOWARD THE EC AND CONFINED
POPS THU AFTERNOON-FRI MAINLY SOUTH OF I-80. ITS TOUGH TO TIME
THESE TYPE OF IMPULSES SO HAVE MULTIPLE PERIODS OF SIMILAR POPS.
TEMPERATURES LOOK TO BE SLIGHTLY BELOW NORMAL ACROSS THE AREA.
ONSHORE FLOW WILL KEEP LAKE AREAS SEVERAL DEGREES COOLER THAN
OUTLYING LOCATIONS.

CONFIDENCE...MEDIUM.

FEW CHANGES MADE TO THE EXTENDED FORECAST WITH NW UPPER FLOW OVER
THE AREA AND MAINLY SURFACE HIGH PRESSURE ADVERTISED. TEMPERATURES
A FEW DEGREES BELOW CLIMATOLOGY CONTINUE TO BE SUPPORTED IN THIS
PATTERN.

MTF

&&

.AVIATION...

//ORD AND MDW CONCERNS...UPDATED 18Z...

* WEST/NORTHWEST WINDS PRIOR TO FROPA...WITH WINDS THEN SHIFTING
  TO THE NORTHEAST WITH LAKE BREEZE INTERACTION BY LATE AFTERNOON.

* TSRA TO AFFECT THE TERMINAL AREA EARLY THIS AFTERNOON...WITH MDW
  OBSERVING BEST CHANCES FOR TSRA THIS AFTERNOON.

RODRIGUEZ

//DISCUSSION...UPDATED 18Z...

LATEST RADAR IMAGERY SHOWING TS DEVELOPMENT EARLY THIS AFTERNOON
PRIMARILY ALONG A WEAK TROUGH AXIS FROM AROUND MDW SOUTHWEST TO LA
SALLE...WITH MORE ISOLATED DEVELOPMENT ONGOING MORE TOWARDS THE
ACTUAL FRONT IN FAR NORTHEAST ILLINOIS. EXPECT THE CURRENT TS
ONGOING NEAR MDW TO SLOWLY DRIFT SOUTHEAST WITH SOME UPGROWTH IN
COVERAGE POSSIBLE OVER THE NEXT COUPLE OF HOURS. MDW/GYY APPEAR TO
BE THE MORE FAVORED LOCATIONS TO OBSERVE THIS TS BEFORE THIS
DEVELOPMENT EXITS TO THE SOUTHEAST. DID MAINTAIN VCTS FOR ORD/DPA
THROUGH THE 21Z TIME FRAME AS IT DOES APPEAR THAT MAYBE
REDEVELOPMENT COULD OCCUR ALONG THE ACTUAL FRONT AS IT DROPS
SOUTHEAST THROUGH THE AREA. THEN WITH FROPA...ANY FURTHER
DEVELOPMENT SHOULD REMAIN SOUTH/SOUTHEAST OF ALL THE TERMINALS
LATER THIS AFTERNOON AND EARLY EVENING.

WINDS CONTINUE TO VARY FROM THE WEST TO NORTHWEST ALONG THIS
TROUGH AXIS...BUT WITH WINDS EXPECTED TO CONTINUE NORTHWEST WITH
FROPA THROUGH THIS AFTERNOON. A TREND TOWARDS A MORE NORTHERLY
DIRECTION IS THEN EXPECTED...WHILE CURRENT LAKE BREEZE HELPS SHIFT
THE WINDS TO THE NORTHEAST BY 23Z FOR ORD/MDW/GYY. A NORTHEAST
DIRECTION IS THEN EXPECTED THROUGH THE REMAINDER OF THE FORECAST
PERIOD FOR ALL TERMINALS.

RODRIGUEZ

//ORD AND MDW CONFIDENCE...UPDATED 18Z...

* MEDIUM CONFIDENCE WITH WIND TRENDS THROUGH MID AFTERNOON...AND
  MEDIUM CONFIDENCE IN TIMING OF NORTHEASTERLY WIND SHIFT LATER
  THIS AFTERNOON.

* MEDIUM CONFIDENCE WITH TSRA TRENDS THIS AFTERNOON.

RODRIGUEZ

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

THURSDAY NIGHT AND FRIDAY...VFR. BETTER CHANCE FOR ANY TSRA
SHOULD BE MAINLY SOUTH OF CHICAGO THURSDAY NIGHT AND FRIDAY
MORNING.

SATURDAY AND SUNDAY...VFR.

MONDAY...VFR. SLIGHT CHANCE OF TSRA.

TUESDAY...VFR.

KJB

&&

.MARINE...
135 PM CDT

A SERIES OF WEAK LOW PRESSURES WERE ORIENTED ALONG A SLOW MOVING
FRONTAL BOUNDARY LATE THIS AFTERNOON...STRETCHING SOUTHWEST FROM
JUST NORTH OF LAKE HURON TO THE SOUTHERN PORTION OF LAKE MICHIGAN.
THIS BOUNDARY WILL CONTINUE TO DRIFT SOUTHEAST...WITH WINDS OVER THE
LAKE SHIFTING FROM WEST/SOUTHWEST TO NORTH. MEANWHILE HIGH PRESSURE
OVER THE NORTHERN PLAINS/UPPER MIDWEST WILL CONTINUE TO BUILD INTO
THE WESTERN GREAT LAKES REGION. BETWEEN THESE TWO SYSTEMS THE
PRESSURE GRADIENT WILL TIGHTEN BRIEFLY...ALONG WITH NORTHERLY WINDS
TO AT TIMES NORTHEASTERLY WINDS...ALLOWING GUSTS TO APPROACH 25 KT
AT TIMES TONIGHT. THIS ALL SUGGESTS WAVES BUILDING ESPECIALLY THE
SOUTHERN AND SOUTHWEST PORTIONS OF LAKE MICHIGAN. IN ADDITION THIS
APPEARS TO CREATE STRONGER CURRENTS FOR THE NEARSHORE WATERS BETWEEN
CHICAGO AND GARY. AT THIS TIME HAVE OPTED TO HOLD OFF ON ANY BEACH
HAZARDS...HOWEVER THE OVERNIGHT SHIFT MAY NEED TO ISSUE A HEADLINE
IF THE WINDS TREND STRONGER OVERNIGHT THAN WHAT CURRENT GUIDANCE IS
SUGGESTING.

HIGH PRESSURE WILL THEN CONTINUE TO BUILD INTO THE REGION FOR
THURSDAY INTO FRIDAY...WITH LIGHT WINDS EXPECTED FOR MUCH OF THE
LAKE. WITH THE HIGH PRESSURE CENTER EXPECTED TO PASS OVER THE
NORTHERN PORTION OF THE LAKE...A SLIGHT INCREASE IN THE GRADIENT MAY
OCCUR ACROSS THE SOUTHERN PORTIONS AND PRODUCE SLIGHTLY HIGHER WAVES
IN THE 2 TO 4 FT RANGE. HIGH PRESSURE WILL WEAKEN WITH A SECOND
FRONTAL BOUNDARY PUSHING INTO THE WESTERN GREAT LAKES FRI...WITH A
SLIGHT BUMP IN THE NORTHWEST WINDS. THEN A SECOND AREA OF HIGH
PRESSURE WILL PUSH BACK INTO THE REGION FOR THE UPCOMING WEEKEND.

BEACHLER

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...NONE.
IN...NONE.
LM...NONE.
&&

VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE)

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1124 AM CDT WED AUG 7 2013

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
081630-
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-
1124 AM CDT WED AUG 7 2013 /1224 PM EDT WED AUG 7 2013/

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

  WEATHER HAZARDS EXPECTED:

  CHANCE OF THUNDERSTORMS...A FEW COULD PRODUCE:
     HEAVY RAINFALL.
     FREQUENT LIGHTNING.
     HAIL UP TO THE SIZE OF QUARTERS.
     DAMAGING WIND GUSTS OVER 60 MPH.

  AREAS AFFECTED AND TIMING:

     A CHANCE FOR SCATTERED STORMS EXISTS DURING THE AFTERNOON...
     MAINLY EAST OF A LINE FROM PONTIAC TO GARY.

  DISCUSSION:

WITH A MOIST AND UNSTABLE AIR MASS ACROSS THE AREA ...SCATTERED
STORMS ARE POSSIBLE IN THE VICINITY OF A WEAK COLD FRONT SAGGING
SOUTH THROUGH THE REGION. THERE IS A CHANCE THAT A FEW OF THE
STRONGER STORMS COULD REACH SEVERE LEVELS. ALSO...SOME OF THE
STRONGER STORMS WILL BE CAPABLE OF HEAVY RAINFALL RATES...THOUGH
THE FORWARD SPEED OF STORMS SHOULD LIMIT THE FLASH FLOOD THREAT.
AS THE FRONT MOVES SOUTHEAST...THE STORM THREAT SHOULD END BY
EARLY THIS EVENING.

THERE IS A MODERATE RISK OF RIP CURRENTS ALONG PARTS OF THE
ILLINOIS AND INDIANA SHORE LATE TONIGHT.

THERE IS AN INCREASED RISK OF LARGE WAVES AND DANGEROUS CURRENTS
AT THE ILLINOIS AND INDIANA LAKE MICHIGAN BEACHES TONIGHT.

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

THERE IS AN INCREASED RISK OF LARGE WAVES AND DANGEROUS CURRENTS
AT THE ILLINOIS AND INDIANA LAKE MICHIGAN BEACHES TONIGHT.

THERE IS A MODERATE RISK OF RIP CURRENTS ALONG PARTS OF THE ILLINOIS
AND INDIANA SHORE ON THURSDAY.

THERE IS A CHANCE OF THUNDERSTORMS THURSDAY AFTERNOON THROUGH
FRIDAY EVENING...MAINLY SOUTH OF INTERSTATE 80. CHANCES FOR
STORMS RETURN SUNDAY NIGHT AND MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY THIS AFTERNOON INTO THIS
EVENING.

&&

LMZ740>745-081630-
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-
1124 AM CDT WED AUG 7 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS THIS AFTERNOON INTO EARLY THIS
EVENING. SOME OF THESE THUNDERSTORMS MAY PRODUCE WIND GUSTS OF 35
KNOTS.

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

THERE IS A CHANCE OF THUNDERSTORMS THURSDAY NIGHT THROUGH
FRIDAY...MAINLY ALONG THE INDIANA SHORE. THERE IS ALSO A CHANCE
FOR STORMS ON MONDAY.

&&

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-081630-
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-
1124 AM CDT WED AUG 7 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS OVER THE FAR SOUTHERN PORTIONS
OF THE LAKE THIS AFTERNOON AND INTO EARLY THIS EVENING.

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

THERE IS A CHANCE OF THUNDERSTORMS LATE THURSDAY NIGHT AND INTO
FRIDAY ACROSS THE FAR SOUTH. CHANCES FOR THUNDERSTORMS RETURN
SUNDAY NIGHT AND MONDAY.

&&

KREIN

VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE)

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1239 PM CDT WED AUG 7 2013

ILZ019-032-071815-
LA SALLE IL-LIVINGSTON IL-
1239 PM CDT WED AUG 7 2013

...SPECIAL WEATHER STATEMENT...

AT 1237 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR TONICA...MOVING EAST AT 20 MPH.

ONE HALF INCH DIAMETER HAIL...WINDS GREATER THAN 40 MPH...OCCASIONAL
CLOUD TO GROUND LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH
THIS STORM.

CITIES AND TOWNS AFFECTED...
  TONICA...             OGLESBY...            NAPLATE...
  GRAND RIDGE...        STREATOR...           MARSEILLES...

OTHER LOCATIONS AFFECTED...
BUFFALO ROCK STATE PARK...ILLINI STATE PARK...ILLINOIS VALLEY
COMMUNITY COLLEGE...MATTHIESSEN STATE PARK...STARVED ROCK STATE
PARK...

I-39 BETWEEN MILE MARKERS 45 AND 56.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. HEAVY
RAINFALL COULD LEAD TO STANDING WATER ON ROADWAYS AND POOR
VISIBILITY. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.

&&

LAT...LON 4134 8866 4107 8873 4117 8914 4134 8909
TIME...MOT...LOC 1740Z 282DEG 15KT 4123 8900

BEACHLER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1256 PM CDT WED AUG 07 2013

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

1250 PM     HEAVY RAIN       4 SSE LA SALLE          41.29N 89.05W
08/07/2013  M1.20 INCH       LA SALLE           IL   COCORAHS

            RAINFALL IN THE PAST 40 MINUTES.

&&

C

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
205 PM CDT WED AUG 7 2013

ILZ032-071945-
LIVINGSTON IL-
205 PM CDT WED AUG 7 2013

...SPECIAL WEATHER STATEMENT...

AT 202 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR PONTIAC...MOVING EAST AT 20 MPH.

NICKEL SIZE HAIL...WINDS GREATER THAN 40 MPH...OCCASIONAL CLOUD TO
GROUND LIGHTNING...AND BRIEF HEAVY DOWNPOURS ARE POSSIBLE WITH THIS
STORM.

CITIES AND TOWNS AFFECTED...
  PONTIAC...            ODELL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. HEAVY
RAINFALL COULD LEAD TO STANDING WATER ON ROADWAYS AND POOR
VISIBILITY. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.

&&

LAT...LON 4105 8841 4078 8845 4083 8882 4101 8880
TIME...MOT...LOC 1905Z 273DEG 17KT 4091 8869

ENDERLEN