Alert archive / Indiana / Beach Hazards Statements in 2013

Beach Hazards Statement 7, NWS Chicago, IL

July 22, 2013Lake County, Illinois; Lake County, Porter County, Indiana

NWS Chicago, IL issued this beach hazards statement at Jul 22, 2013, 3:56 PM CDT for Lake County, Illinois; Lake County, Porter County, Indiana. It took effect at Jul 23, 2013, 9:00 AM CDT. It was in force for 36 hr.

The area

The counties it named.

The facts

Issued
Jul 22, 2013, 3:56 PM CDT (20:56 UTC)
In effect from
Jul 23, 2013, 9:00 AM CDT
Expired
Jul 24, 2013, 9:00 PM CDT
In force
36 hr
Issued by
NWS Chicago, IL

Counties Lake County, IL, Lake County, IN, Porter County, IN

The radar

The Chicago radar (KLOT), 57 km from the middle of the area, began a volume at 20:53 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 nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.9 hours before the alert went out and 206 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2013-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 537 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2013-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
537 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
679 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

832 
WHUS43 KLOT 222056
CFWLOT

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
356 PM CDT MON JUL 22 2013

ILZ006-014-INZ001-002-230500-
/O.NEW.KLOT.BH.S.0007.130723T1400Z-130724T2100Z/
/O.CON.KLOT.LS.S.0001.130723T2000Z-130724T1500Z/
LAKE IL-COOK-LAKE IN-PORTER-
356 PM CDT MON JUL 22 2013

...BEACH HAZARDS STATEMENT IN EFFECT FROM TUESDAY MORNING THROUGH
WEDNESDAY AFTERNOON...

...UNSEASONABLY LARGE WAVES LIKELY TUESDAY AFTERNOON THROUGH 
WEDNESDAY MORNING...

* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* OVERVIEW...STRONG NORTHERLY WINDS WILL DEVELOP LATE TONIGHT AND
  CONTINUE INTO WEDNESDAY. WAVES WILL BUILD TO 6 TO 9 FT TUESDAY
  WITH OCCASIONAL HIGHER WAVES POSSIBLE.

STRONG NORTHERLY WINDS BEHIND A STRONG SUMMER COLD FRONT ARE
EXPECTED TO DEVELOP LATE TONIGHT AND CONTINUE INTO WEDNESDAY. THE
STRONG WINDS BLOWING DOWN THE FULL LENGTH OF THE LAKE AND COOLER
AIR MOVING OVER THE WARMER LAKE WATERS WILL RESULT IN UNUSUALLY
LARGE WAVES FOR SUMMER. CURRENT INDICATIONS ARE THAT WAVES COULD
BUILD UP TO 9 FT...PARTICULARLY FROM CHICAGO SOUTH INTO THE
NORTHWEST INDIANA SHORE. THESE LARGE WAVES WILL INUNDATE THE
TYPICALLY LARGE WAVE VULNERABLE LOCATIONS ALONG THE SHORE...
INCLUDING A FEW SPOTS ALONG THE CHICAGO LAKE FRONT BIKE PATH. DO
NOT VENTURE OUT ONTO BREAK WALLS OR TOO CLOSE TO THE BREAKING
WAVES AS OCCASIONAL ROGUE WAVES COULD REACH UP TO 15 FT AND
POTENTIALLY SWEEP YOU OUT INTO THE LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DANGEROUS POUNDING WAVES AND LIFE-THREATENING RIP CURRENTS ARE
EXPECTED AT THE BEACHES. PEOPLE VISITING THE BEACHES SHOULD STAY
OUT OF THE WATER.

RIP CURRENTS ARE POWERFUL CHANNELS OF WATER FLOWING QUICKLY AWAY
FROM SHORE...WHICH OCCUR MOST OFTEN AT LOW SPOTS OR BREAKS IN
SANDBARS. RIP CURRENTS CAN SWEEP YOU OUT AWAY FROM SHORE INTO
DEEPER WATER.

PLEASE VISIT THE FOLLOWING WEBSITE TO SHARE YOUR THOUGHTS ON THE
NEW BEACH HAZARDS STATEMENT...

HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=CHMBHS

&&

$$

VISIT US AT HTTP://WEATHER.GOV/CHICAGO

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO
11 follow-up statements
494 
WHUS43 KLOT 230317
CFWLOT

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
1017 PM CDT MON JUL 22 2013

ILZ006-014-INZ001-002-231130-
/O.CON.KLOT.BH.S.0007.130723T1400Z-130724T2100Z/
/O.CON.KLOT.LS.S.0001.130723T2000Z-130724T1500Z/
LAKE IL-COOK-LAKE IN-PORTER-
1017 PM CDT MON JUL 22 2013

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 9 AM CDT
TUESDAY THROUGH WEDNESDAY AFTERNOON...

...UNSEASONABLY LARGE WAVES LIKELY TUESDAY AFTERNOON THROUGH 
WEDNESDAY MORNING...

* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* OVERVIEW...STRONG NORTHERLY WINDS WILL DEVELOP OVERNIGHT AND
  CONTINUE INTO WEDNESDAY. WAVES WILL BUILD TO 6 TO 9 FT TUESDAY
  WITH OCCASIONAL HIGHER WAVES POSSIBLE.

STRONG NORTHERLY WINDS BEHIND A STRONG SUMMER COLD FRONT ARE
EXPECTED TO DEVELOP LATE TONIGHT AND CONTINUE INTO WEDNESDAY. THE
STRONG WINDS BLOWING DOWN THE FULL LENGTH OF THE LAKE AND COOLER
AIR MOVING OVER THE WARMER LAKE WATERS WILL RESULT IN UNUSUALLY
LARGE WAVES FOR SUMMER. CURRENT INDICATIONS ARE THAT WAVES COULD
BUILD UP TO 9 FT...PARTICULARLY FROM CHICAGO SOUTH INTO THE
NORTHWEST INDIANA SHORE. THESE LARGE WAVES WILL INUNDATE THE
TYPICALLY LARGE WAVE VULNERABLE LOCATIONS ALONG THE SHORE...
INCLUDING A FEW SPOTS ALONG THE CHICAGO LAKE FRONT BIKE PATH. DO
NOT VENTURE OUT ONTO BREAK WALLS OR TOO CLOSE TO THE BREAKING
WAVES AS OCCASIONAL ROGUE WAVES COULD REACH UP TO 15 FT AND
POTENTIALLY SWEEP YOU OUT INTO THE LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DANGEROUS POUNDING WAVES AND LIFE-THREATENING RIP CURRENTS ARE
EXPECTED AT THE BEACHES. PEOPLE VISITING THE BEACHES SHOULD STAY
OUT OF THE WATER.

RIP CURRENTS ARE POWERFUL CHANNELS OF WATER FLOWING QUICKLY AWAY
FROM SHORE...WHICH OCCUR MOST OFTEN AT LOW SPOTS OR BREAKS IN
SANDBARS. RIP CURRENTS CAN SWEEP YOU OUT AWAY FROM SHORE INTO
DEEPER WATER.

PLEASE VISIT THE FOLLOWING WEBSITE TO SHARE YOUR THOUGHTS ON THE
NEW BEACH HAZARDS STATEMENT...

HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=CHMBHS

&&

$$

VISIT US AT HTTP://WEATHER.GOV/CHICAGO

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO
493 
WHUS43 KLOT 230948
CFWLOT

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
448 AM CDT TUE JUL 23 2013

ILZ006-014-INZ001-002-231800-
/O.CAN.KLOT.LS.S.0001.130723T2000Z-130724T1500Z/
/O.CON.KLOT.BH.S.0007.130723T1400Z-130724T2100Z/
LAKE IL-COOK-LAKE IN-PORTER-
448 AM CDT TUE JUL 23 2013

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 9 AM CDT THIS
MORNING THROUGH WEDNESDAY AFTERNOON...

...UNSEASONABLY LARGE WAVES LIKELY THIS AFTERNOON THROUGH WEDNESDAY
MORNING...


* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* OVERVIEW...STRONG NORTHERLY WINDS WILL DEVELOP TODAY AND
  CONTINUE INTO WEDNESDAY. WAVES WILL BUILD TO 10 TO 12 FT WITH
  OCCASIONAL HIGHER WAVES POSSIBLE.

STRONG NORTHERLY WINDS BEHIND A UNSEASONABLY STRONG COLD FRONT
ARE EXPECTED TO DEVELOP TODAY AND CONTINUE INTO WEDNESDAY.
THE STRONG WINDS BLOWING DOWN THE FULL LENGTH OF THE LAKE AND
COOLER AIR MOVING OVER THE WARMER LAKE WATERS WILL RESULT IN
UNUSUALLY LARGE WAVES FOR SUMMER. CURRENT INDICATIONS ARE THAT
WAVES COULD BUILD UP TO 10 FT...OR POSSIBLY HIGHER...PARTICULARLY
FROM CHICAGO SOUTH INTO THE NORTHWEST INDIANA SHORE. THESE LARGE
WAVES WILL INUNDATE THE TYPICALLY LARGE WAVE VULNERABLE LOCATIONS
ALONG THE SHORE... INCLUDING A FEW SPOTS ALONG THE CHICAGO LAKE
FRONT BIKE PATH. DO NOT VENTURE OUT ONTO BREAK WALLS OR TOO CLOSE
TO THE BREAKING WAVES AS OCCASIONAL ROGUE WAVES COULD REACH UP TO
15 FT AND POTENTIALLY SWEEP YOU OUT INTO THE LAKE.



PRECAUTIONARY/PREPAREDNESS ACTIONS...

DANGEROUS POUNDING WAVES AND LIFE-THREATENING RIP CURRENTS ARE
EXPECTED AT THE BEACHES. PEOPLE VISITING THE BEACHES SHOULD STAY
OUT OF THE WATER.


PLEASE VISIT THE FOLLOWING WEBSITE TO SHARE YOUR THOUGHTS ON THE
NEW BEACH HAZARDS STATEMENT...

HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=CHMBHS

&&

$$

KREIN

VISIT US AT HTTP://WEATHER.GOV/CHICAGO

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO
093 
WHUS43 KLOT 231834
CFWLOT

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
134 PM CDT TUE JUL 23 2013

ILZ006-014-INZ001-002-240245-
/O.CON.KLOT.BH.S.0007.000000T0000Z-130724T2100Z/
LAKE IL-COOK-LAKE IN-PORTER-
134 PM CDT TUE JUL 23 2013

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
AFTERNOON...

* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* OVERVIEW...STRONG NORTHERLY WINDS WILL CONTINUE THIS AFTERNOON
  THEN BECOME NORTHEAST OVERNIGHT AND GRADUALLY DECREASE. WAVES
  WILL BUILD TO 7 TO 10 FT WITH OCCASIONAL WAVES UP TO 15 FT.

STRONG NORTHERLY WINDS BEHIND A UNSEASONABLY STRONG COLD FRONT
WILL CONTINUE TO STRENGTHEN THIS AFTERNOON AND THEN BECOME
NORTHEASTERLY OVERNIGHT...AND GRADUALLY DIMINISH. THE STRONG
WINDS BLOWING DOWN THE FULL LENGTH OF THE LAKE AND COOLER AIR
MOVING OVER THE WARMER LAKE WATERS WILL RESULT IN UNUSUALLY LARGE
WAVES FOR SUMMER. WAVES ARE EXPECTED TO GROW TO 5 TO 7 FT BY THIS
EVENING...AND CONTINUE TO BUILD TO 7 TO 10 FT TONIGHT. HIGHEST OF
THE WAVES WILL OCCUR FROM SOUTH CHICAGO TO MICHIGAN CITY. 

THE LARGEST WAVES MAY INUNDATE LOCATIONS ALONG THE LAKE SHORE
THAT ARE TYPICALLY VULNERABLE TO LARGE WAVES. DO NOT VENTURE OUT
ONTO BREAK WALLS OR TOO CLOSE TO THE BREAKING WAVES. OCCASIONAL
ROGUE WAVES OF UP TO 15 FT COULD SWEEP YOU INTO THE LAKE DUE TO
THE GREAT POWER OF WAVES HIGH WAVES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DANGEROUS POUNDING WAVES AND LIFE-THREATENING RIP CURRENTS ARE
EXPECTED AT THE BEACHES. PEOPLE VISITING THE BEACHES SHOULD STAY
OUT OF THE WATER.

&&

PLEASE VISIT THE FOLLOWING WEBSITE TO SHARE YOUR THOUGHTS ON THE
NEW BEACH HAZARDS STATEMENT...

HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=CHMBHS

$$
521 
WHUS43 KLOT 231846 CCA
CFWLOT

LAKESHORE HAZARD MESSAGE...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO IL
145 PM CDT TUE JUL 23 2013

ILZ006-014-INZ001-002-240300-
/O.COR.KLOT.BH.S.0007.000000T0000Z-130724T2100Z/
LAKE IL-COOK-LAKE IN-PORTER-
145 PM CDT TUE JUL 23 2013

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
AFTERNOON...

* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* OVERVIEW...STRONG NORTHERLY WINDS WILL CONTINUE THIS AFTERNOON
  THEN BECOME NORTHEAST OVERNIGHT AND GRADUALLY DECREASE. WAVES
  WILL BUILD TO 7 TO 10 FT WITH OCCASIONAL WAVES UP TO 15 FT.

STRONG NORTHERLY WINDS BEHIND A UNSEASONABLY STRONG COLD FRONT
WILL CONTINUE TO STRENGTHEN THIS AFTERNOON AND THEN BECOME
NORTHEASTERLY OVERNIGHT...AND GRADUALLY DIMINISH. THE STRONG
WINDS BLOWING DOWN THE FULL LENGTH OF THE LAKE AND COOLER AIR
MOVING OVER THE WARMER LAKE WATERS WILL RESULT IN UNUSUALLY LARGE
WAVES FOR SUMMER. WAVES ARE EXPECTED TO GROW TO 5 TO 7 FT BY THIS
EVENING...AND CONTINUE TO BUILD TO 7 TO 10 FT TONIGHT. HIGHEST OF
THE WAVES WILL OCCUR FROM SOUTH CHICAGO TO MICHIGAN CITY. 

THE LARGEST WAVES MAY INUNDATE LOCATIONS ALONG THE LAKE SHORE
THAT ARE TYPICALLY VULNERABLE TO LARGE WAVES. DO NOT VENTURE OUT
ONTO BREAK WALLS OR TOO CLOSE TO THE BREAKING WAVES. OCCASIONAL
ROGUE WAVES OF UP TO 15 FT COULD SWEEP YOU INTO THE LAKE DUE TO
THE GREAT POWER OF WAVES HIGH WAVES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DANGEROUS POUNDING WAVES AND LIFE-THREATENING RIP CURRENTS ARE
EXPECTED AT THE BEACHES. PEOPLE VISITING THE BEACHES SHOULD STAY
OUT OF THE WATER.

$$
802 
WHUS43 KLOT 232117
CFWLOT

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
417 PM CDT TUE JUL 23 2013

ILZ006-014-INZ001-002-240530-
/O.CON.KLOT.BH.S.0007.000000T0000Z-130724T2100Z/
LAKE IL-COOK-LAKE IN-PORTER-
417 PM CDT TUE JUL 23 2013

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
AFTERNOON...

* HIGH WAVES CREATING DANGEROUS SWIMMING CONDITIONS THE REST OF
  TODAY...OVERNIGHT AND INTO WEDNESDAY AFTERNOON.

* OVERVIEW...STRONG NORTH WINDS WILL CONTINUE THIS INTO THIS
  EVENING THEN BECOME NORTHEAST OVERNIGHT AND GRADUALLY DECREASE.
  WAVES WILL BUILD TO 7 TO 9 FT WITH OCCASIONAL WAVES UP TO 
  13 FT.

STRONG NORTHERLY WINDS BEHIND A UNSEASONABLY STRONG COLD FRONT
WILL CONTINUE TO LATE THIS AFTERNOON AND THIS EVENING AND THEN
BECOME NORTHEAST OVERNIGHT...AND GRADUALLY DIMINISHING. THE
STRONG WINDS BLOWING DOWN THE FULL LENGTH OF THE LAKE AND COOLER
AIR MOVING OVER THE WARMER LAKE WATERS WILL RESULT IN UNUSUALLY
LARGE WAVES FOR SUMMER. WAVES WILL GROW TO 7 TO 9 FT THIS EVENING
AND CONTINUE INTO THE LATE NIGHT BEFORE STARTING TO GRADUALLY
SUBSIDE EARLY WEDNESDAY MORNING. THE TALLEST OF THE WAVES WILL
OCCUR FROM DOWNTOWN CHICAGO AROUND THE SOUTH TIP OF LAKE MICHIGAN
TO MICHIGAN CITY.

THE LARGEST WAVES MAY INUNDATE LOCATIONS ALONG THE LAKE SHORE
THAT ARE TYPICALLY VULNERABLE TO LARGE WAVES. DO NOT VENTURE OUT
ONTO BREAK WALLS OR TOO CLOSE TO THE BREAKING WAVES. THE
OCCASIONAL ROGUE WAVE OF 15 TO 18 FT COULD SWEEP YOU INTO THE
LAKE DUE TO THE GREAT POWER OF HIGH WAVES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DANGEROUS POUNDING WAVES AND LIFE-THREATENING RIP CURRENTS ARE
EXPECTED AT THE BEACHES. PEOPLE VISITING THE BEACHES SHOULD STAY
OUT OF THE WATER.

$$

TRS

VISIT US AT HTTP://WEATHER.GOV/CHICAGO

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO
520 
WHUS43 KLOT 232325
CFWLOT

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
625 PM CDT TUE JUL 23 2013

ILZ006-014-INZ001-002-240730-
/O.CON.KLOT.BH.S.0007.000000T0000Z-130724T2100Z/
LAKE IL-COOK-LAKE IN-PORTER-
625 PM CDT TUE JUL 23 2013

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
AFTERNOON...

* HIGH WAVES CREATING DANGEROUS SWIMMING CONDITIONS TONIGHT AND
  THROUGH WEDNESDAY AFTERNOON.

* OVERVIEW...STRONG NORTH TO NORTHEAST WINDS WILL CONTINUE THIS
  EVENING THEN GRADUALLY DECREASE OVERNIGHT AND INTO WEDNESDAY.
  WAVES ALONG THE ILLINOIS SHORE WILL BUILD TO 7 TO 10 FT WITH
  OCCASIONAL WAVES UP TO 14 FT AND ALONG THE INDIANA SHORE TO 8 TO
  12 FT WITH OCCASIONAL WAVES UP TO 16 FT.

STRONG NORTHERLY WINDS BEHIND AN UNSEASONABLY STRONG COLD FRONT
WILL RESULT IN UNUSUALLY LARGE WAVES FOR SUMMER. THE TALLEST OF
THE WAVES WILL OCCUR FROM DOWNTOWN CHICAGO AROUND THE SOUTH TIP OF
LAKE MICHIGAN TO MICHIGAN CITY.

THE LARGEST WAVES MAY INUNDATE LOCATIONS ALONG THE LAKE SHORE
THAT ARE TYPICALLY VULNERABLE TO LARGE WAVES. DO NOT VENTURE OUT
ONTO BREAK WALLS OR TOO CLOSE TO THE BREAKING WAVES. THE
OCCASIONAL ROGUE WAVE OF 15 TO 18 FT COULD SWEEP YOU INTO THE
LAKE DUE TO THE GREAT POWER OF HIGH WAVES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DANGEROUS POUNDING WAVES AND LIFE-THREATENING RIP CURRENTS ARE
EXPECTED AT THE BEACHES. PEOPLE VISITING THE BEACHES SHOULD STAY
OUT OF THE WATER.

$$

MTF

VISIT US AT HTTP://WEATHER.GOV/CHICAGO

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO
423 
WHUS43 KLOT 240255
CFWLOT

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
955 PM CDT TUE JUL 23 2013

ILZ006-014-INZ001-002-241100-
/O.CON.KLOT.BH.S.0007.000000T0000Z-130724T2100Z/
LAKE IL-COOK-LAKE IN-PORTER-
955 PM CDT TUE JUL 23 2013

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
AFTERNOON...

* HIGH WAVES CREATING DANGEROUS SWIMMING CONDITIONS OVERNIGHT AND
  THROUGH WEDNESDAY AFTERNOON.

* OVERVIEW...STRONG NORTH TO NORTHEAST WINDS WILL SLOWLY DECREASE
  OVERNIGHT AND INTO WEDNESDAY...HOWEVER WAVES WILL REMAIN HIGH
  THROUGH DAYBREAK BEFORE GRADUALLY SUBSIDING. OVERNIGHT WAVE
  HEIGHTS ALONG THE ILLINOIS SHORE WILL REMAIN AT 7 TO 10 FT WITH
  OCCASIONAL WAVES UP TO 14 FT WHILE ALONG THE INDIANA SHORE AT 8
  TO 12 FT WITH OCCASIONAL WAVES UP TO 16 FT.

STRONG NORTHERLY WINDS BEHIND AN UNSEASONABLY STRONG COLD FRONT
WILL CONTINUE TO RESULT IN UNUSUALLY LARGE WAVES FOR SUMMER. THE
TALLEST OF THE WAVES WILL OCCUR FROM DOWNTOWN CHICAGO AROUND THE
SOUTH TIP OF LAKE MICHIGAN TO MICHIGAN CITY OVERNIGHT INTO EARLY
WEDNESDAY.

THE LARGEST WAVES MAY INUNDATE LOCATIONS ALONG THE LAKE SHORE
THAT ARE TYPICALLY VULNERABLE TO LARGE WAVES. DO NOT VENTURE OUT
ONTO BREAK WALLS OR TOO CLOSE TO THE BREAKING WAVES. THE
OCCASIONAL ROGUE WAVE OF UP TO 16 FT ALONG THE ILLINOIS SHORE AND
UP TO 20 FT ALONG THE INDIANA SHORE COULD SWEEP YOU INTO THE LAKE
DUE TO THE GREAT POWER OF HIGH WAVES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DANGEROUS POUNDING WAVES AND LIFE-THREATENING RIP CURRENTS ARE
EXPECTED AT THE BEACHES. PEOPLE VISITING THE BEACHES SHOULD STAY
OUT OF THE WATER.

$$

MTF

VISIT US AT HTTP://WEATHER.GOV/CHICAGO

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO
434 
WHUS43 KLOT 240801
CFWLOT

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
301 AM CDT WED JUL 24 2013

ILZ006-014-INZ001-002-241615-
/O.CON.KLOT.BH.S.0007.000000T0000Z-130724T2100Z/
LAKE IL-COOK-LAKE IN-PORTER-
301 AM CDT WED JUL 24 2013

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THIS
AFTERNOON...

* HIGH WAVES CREATING DANGEROUS SWIMMING CONDITIONS OVERNIGHT 
  AND THROUGH WEDNESDAY AFTERNOON. 

* OVERVIEW...STRONG NORTH TO NORTHEAST WINDS WILL SLOWLY DECREASE
  THROUGH THE DAY TODAY...HOWEVER WAVES WILL REMAIN HIGH THROUGH
  DAYBREAK BEFORE GRADUALLY SUBSIDING. WAVE HEIGHTS ALONG THE
  ILLINOIS SHORE WILL BE 6 TO 9 FT WITH OCCASIONAL WAVES
  UP TO 13 FT WHILE ALONG THE INDIANA SHORE AT 8 TO 12 FT WITH
  OCCASIONAL WAVES UP TO 16 FT.

STRONG NORTHERLY WINDS BEHIND AN UNSEASONABLY STRONG COLD FRONT
WILL CONTINUE TO RESULT IN UNUSUALLY LARGE WAVES FOR SUMMER. THE
TALLEST OF THE WAVES WILL OCCUR FROM DOWNTOWN CHICAGO AROUND THE
SOUTH TIP OF LAKE MICHIGAN TO MICHIGAN CITY UNTIL THIS AFTERNOON.

THE LARGEST WAVES MAY INUNDATE LOCATIONS ALONG THE LAKE SHORE
THAT ARE TYPICALLY VULNERABLE TO LARGE WAVES. DO NOT VENTURE OUT
ONTO BREAK WALLS OR TOO CLOSE TO THE BREAKING WAVES. THE
OCCASIONAL ROGUE WAVE OF UP TO 13 FT ALONG THE ILLINOIS SHORE AND
UP TO 16 FT ALONG THE INDIANA SHORE COULD SWEEP YOU INTO THE LAKE
DUE TO THE GREAT POWER OF HIGH WAVES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DANGEROUS POUNDING WAVES AND LIFE-THREATENING RIP CURRENTS ARE
EXPECTED AT THE BEACHES. PEOPLE VISITING THE BEACHES SHOULD STAY
OUT OF THE WATER.

$$

KREIN

VISIT US AT HTTP://WEATHER.GOV/CHICAGO

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO
083 
WHUS43 KLOT 241527
CFWLOT

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
1027 AM CDT WED JUL 24 2013

ILZ006-014-INZ001-002-242100-
/O.CON.KLOT.BH.S.0007.000000T0000Z-130724T2100Z/
LAKE IL-COOK-LAKE IN-PORTER-
1027 AM CDT WED JUL 24 2013

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 4 PM CDT THIS
AFTERNOON...

* HIGH WAVES CREATING DANGEROUS SWIMMING CONDITIONS THROUGH THIS 
  AFTERNOON.

* OVERVIEW...STRONG NORTH TO NORTHEAST WINDS CONTINUE TO GRADUALLY
  DIMINISH THIS MORNING...THOUGH WAVES WILL ONLY SLOWLY SUBSIDE
  THROUGH THIS AFTERNOON. WAVE HEIGHTS RANGING FROM 4 TO 6 FEET
  ALONG THE ILLINOIS SHORE NORTH OF CHICAGO TO 5 TO 8 FEET ALONG
  THE INDIANA SHORE WILL GRADUALLY COME DOWN TO 2 TO 4 FEET BY
  THIS EVENING. OCCASIONALLY HIGHER WAVES MAY CONTINUE TO AFFECT
  LOCATIONS ALONG THE LAKE SHORE THROUGH EARLY OR MID AFTERNOON.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

DANGEROUS WAVES AND LIFE-THREATENING RIP CURRENTS ARE EXPECTED AT
THE BEACHES. PEOPLE VISITING THE BEACHES SHOULD STAY OUT OF THE
WATER.

$$

RATZER

VISIT US AT HTTP://WEATHER.GOV/CHICAGO

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
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WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO
513 
WHUS43 KLOT 242005
CFWLOT

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
305 PM CDT WED JUL 24 2013

ILZ006-014-INZ001-002-250300-
/O.EXT.KLOT.BH.S.0007.000000T0000Z-130725T0300Z/
LAKE IL-COOK-LAKE IN-PORTER-
305 PM CDT WED JUL 24 2013

...BEACH HAZARDS STATEMENT NOW IN EFFECT UNTIL 10 PM CDT THIS
EVENING...

* HIGH WAVES CREATING DANGEROUS SWIMMING CONDITIONS THROUGH THIS
  EVENING.

* OVERVIEW...NORTHEAST WINDS CONTINUE TO DIMINISH ON SOUTHERN LAKE
  MICHIGAN IN THE WAKE OF YESTERDAYS COLD FRONTAL PASSAGE. HOWEVER
  WAVES REMAIN IN EXCESS OF 4 FEET IN MOST SHORE LOCATIONS THIS
  AFTERNOON AND WILL CONTINUE TO GRADUALLY DIMINISH THROUGH THIS
  EVENING. THIS WILL PRESENT HAZARDOUS SWIMMING CONDITIONS INTO
  THIS EVENING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DANGEROUS WAVES AND LIFE-THREATENING RIP CURRENTS ARE EXPECTED AT
THE BEACHES. PEOPLE VISITING THE BEACHES SHOULD STAY OUT OF THE
WATER.

$$

RATZER

VISIT US AT HTTP://WEATHER.GOV/CHICAGO

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
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WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO
890 
WHUS43 KLOT 250200
CFWLOT

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
900 PM CDT WED JUL 24 2013

ILZ006-014-INZ001-002-250300-
/O.CAN.KLOT.BH.S.0007.000000T0000Z-130725T0300Z/
LAKE IL-COOK-LAKE IN-PORTER-
900 PM CDT WED JUL 24 2013

...BEACH HAZARDS STATEMENT IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS CANCELLED THE BEACH
HAZARDS STATEMENT. 

OBSERVATIONS...VISUAL SIGHTINGS...AND WEBCAMS CONTINUE TO INDICATE
WAVES SUBSIDING ALONG THE ILLINOIS AND INDIANA SHORES...NOW
CONSISTENTLY BELOW FOUR FEET. THUS THE BEACH HAZARDS STATEMENT IS
CANCELLED.

$$

MTF

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What forecasters said that day

The local office's own words before this beach hazards statement 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 beach hazards statement went out at Jul 22, 3:14 PM CDT, 42 minutes earlier.

Area forecast discussion, Jul 22, 3:14 PM CDT, 42 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
314 PM CDT MON JUL 22 2013

.DISCUSSION...
310 PM CDT

VISIBLE IMAGERY INDICATES A FEW BOUNDARIES ACROSS NORTHEAST
IL/NORTHWEST IN...WITH SOME VERTICAL GROWTH IN THE CU FIELD NOTED.
FURTHER WEST SOME DRYING HAS OCCURRED. TEMPS HAVE STEADILY WARMED
THIS AFTERNOON INTO THE MID/UPR 80S...AND SHOULD EVENTUALLY TOP OUT
ARND 90 DEGREES. THE MAIN CHALLENGE IS DETERMINING IF ANY
SHOWERS/THUNDERSTORMS WILL EVENTUALLY DEVELOP ALONG THE LAKE BREEZE
OR THE OTHER BOUNDARIES THAT ARE ACROSS THE CWFA.

MESOANALYSIS INDICATES SOME BETTER MOISTURE CONVERGENCE HAS
DEVELOPED IN THE VICINITY OF THE LAKE BREEZE...HOWEVER THIS IS ALL
RELATIVE CONSIDERING AT THIS TIME IT DOESN/T APPEAR TO BE ANYTHING
SIGNIFICANT. MUCAPE OF NEARLY 2K J/KG HAS DEVELOPED...HOWEVER THE
BULK SHEAR VALUES IN THE 0-6KM LAYER IS MUCH LESS THAN THE PAST FEW
DAYS AT 20KTS. WHICH IS PROBABLY THE LIGHTEST IT HAS BEEN FOR
SEVERAL DAYS. NONETHELESS THE ENVIRONMENT DOES NOT LOOK FABULOUS FOR
CONVECTIVE POTENTIAL THROUGH 00Z...BEYOND 00Z THOUGH IT IS A
DIFFERENT STORY.

THE SHARP COLD FRONT BEGINS TO MOVE SOUTHEAST ACROSS NORTHCENTRAL
WISC STRETCHING SOUTHWEST THROUGH NORTHEAST IOWA BY 00Z. DECENT
INSTABILITY POOLS ALONG THE BOUNDARY WITH SOME COMPRESSIONAL WARMING
NOTED AMONGST SOME OF THE HI-RES SOLUTIONS. IT APPEARS THE BEST
TIMING FOR NEW CONVECTIVE DEVELOPMENT NEARING THE NORTHWEST CWFA
WILL BE CLOSER TO ARND 2-4Z...THEN SLOWLY WORKING SOUTHEAST ACROSS
THE REMAINDER OF THE CWFA. THERE IS SOME CONCERN THAT THE
COVERAGE/INTENSITY OF THE SHOWERS/THUNDERSTORMS MAY BE DIMINISHING
LATER TONIGHT...AND IT IS CONCEIVABLE TO SEE MANY LOCATIONS MISSING
OUT ON SEEING PRECIP THROUGH FRONTAL PASSAGE. HOWEVER WITH THE LARGE
CHANNEL OF WATER VAPOR...AND INCREASED INSTABILITY ASSOCIATED WITH
THE FRONT...IT IS DIFFICULT TO SEE THIS SCENARIO PANNING OUT. THUS
HAVE HELD ONTO 40-50 POPS THROUGH THE OVERNIGHT HOURS. WINDS WILL BE
SHIFTING WEST/NORTHWEST WITH FROPA...AND THE GRADIENT WILL BE
QUICKLY INCREASING AND BRING MUCH DRIER IN DURING THE PRE-DAWN HOURS
TO THE NORTHERN/NORTHWEST CWFA.

CONFIDENCE...MEDIUM/HIGH.

TUESDAY THROUGH WEDNESDAY...
PATTERN CHANGE CONTINUES TO BE IN STORE FOR TUE/WED AS A SHARP COLD
FRONT ARRIVES ACROSS THE REGION EARLY TUE...WITH A SECONDARY
BOUNDARY POISED TO PASS THRU TUE MID-MORNING. AT THIS TIME HAVE HELD
ONTO SLIGHT CHC POPS FOR TUE MORNING...HOWEVER FEEL THAT PRIOR TO
THE SECONDARY BOUNDARY SLIPPING THROUGH THE CWFA SOME SFC HEATING
MAY TAKE PLACE AND ALLOW FOR AN ISOLATED SHOWER/THUNDERSTORM TO
DEVELOP. THIS APPEARS TO BE FOCUSED ALONG AND EAST OF A PONTIAC TO
GARY LINE. 850MB THERMAL TROUGH WILL CONTINUE TO ADVECT INTO THE
REGION FROM THE NORTHWEST...WITH TEMPS COOLING TO ARND 15 DEG C IN
THE MORNING THEN CLOSER TO 10 DEG BY THE AFTN HOURS. WHICH COULD
VERY WELL POINT TOWARDS TEMPS EITHER REMAINING STEADY IN THE MID/UPR
70S. IF THE FRONTAL PASSAGE SLOWS...TEMPS MAY BE ABLE TO WARM TO 80
OR POSSIBLY THE LOW 80S FOR AREAS SOUTH OF I-88.

THEN ANTI-CYCLONIC FLOW PUSHES INTO THE REGION TUE EVENING AND
LINGERS THROUGH MID-WEEK. IT DOES APPEAR THAT ALONG THE LEADING EDGE
OF THE SFC RIDGE...THE GRADIENT WILL BE STRONG AND SUGGESTS BREEZY
CONDITIONS CAN BE EXPECTED FOR THE REGION THROUGH WED MORNING.

WITH SFC RIDGE BECOMING CENTERED ACROSS IOWA...THE CWFA WILL BE IN A
CONTINUED NORTH FLOW IN THE LOWER LEVELS. THIS WILL CREATE A LAKE
SHADOW EFFECT AND KEEP THE ADJACENT LAKESHORE AREAS IN THE LOW 70S.
FURTHER INLAND TEMPS SHUD WARM INTO THE MID 70S. THE WARMEST TEMPS
WILL BE THE FAR WEST/SOUTHWEST...WHERE TEMPS MAY TOUCH 80 DEG WED
AFTN.

CONFIDENCE...HIGH.

THURSDAY THROUGH MONDAY...
EXTENDED FORECAST GUIDANCE CONTINUES TO DEMONSTRATE A SLIGHTLY
COOLER SETUP WITH GENERALLY A 500MB NORTHWEST FLOW. ANTI-CYCLONIC
FLOW WILL LINGER THROUGH THUR...THEN SLOWLY PUSH EAST BY THUR NIGHT.
500MB SHORTWAVE IS PROGGED TO PUSH INTO WESTERN ONTARIO THUR NIGHT
WITH A SFC LOW ROUNDING THE TROUGH AXIS AND A FRONTAL BOUNDARY
STRETCHING SOUTHWEST THROUGH THE SOUTHERN PLAINS. THIS FEATURE WILL
THEN ARRIVE ACROSS THE CWFA FRI WITH THE NEXT CHC FOR PRECIP. THEN
THE 500MB TROUGH DIGS FURTHER SOUTH ACROSS THE UPPER MIDWEST/GREAT
LAKES FOR THE WEEKEND...ALONG WITH SFC RIDGING DRYING THINGS OUT
AGAIN. WITH TEMPS SHOWING SOME WEAK WARMING PRIOR TO THE FRONTAL
BOUNDARY PASSAGE FRI TO NEAR 80 OR THE LOW 80S...THEN COOLER AIR
ARRIVES FOR THE WEEKEND AND TEMPS STRUGGLE TO WARM BEYOND THE
MID/UPR 70S.

CONFIDENCE...MEDIUM/HIGH.

BEACHLER

&&

.AVIATION...

//ORD AND MDW CONCERNS...UPDATED 20Z...

* SOMEWHAT VARIABLE DIRECTION TO LIGHT WINDS EARLY THIS AFTERNOON
  WITH LAKE BREEZE LIKELY BY AROUND 22Z THIS AFTERNOON.

* VERY LOW PROBABILITY OF ISOLATED TSRA THIS AFTERNOON.

* CHANCE OF SCATTERED TSRA LATE TONIGHT.

* TIMING OF WIND SHIFT FROM SW TO NNE EARLY TUESDAY MORNING...
  WITH GUSTS NEAR 20 KT AT TIMES.

* POTENTIAL FOR A PERIOD OF MVFR CEILINGS BEHIND COLD FRONT
  TUESDAY.

RATZER

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

LIGHT/VARIABLE WIND FIELD REMAINS ACROSS THE TERMINALS THIS
AFTERNOON IN WEAK PRESSURE GRADIENT IN THE WAKE OF A WEAK LOW
PRESSURE AREA OVER INDIANA. THOUGH SOME VARIABILITY LIKELY...WINDS
EXPECTED TO REMAIN GENERALLY LESS THAN 10 KT WITH A WEST-SOUTHWEST
DIRECTION THROUGH EARLY AFTERNOON. WEAK LAKE BREEZE ALREADY
DEVELOPING ALONG THE SHORE PER RADAR/MARINE OBS PLATFORMS...AND
SUSPECT LAKE BREEZE WILL MOVE INLAND AS FAR AS ORD/MDW. HAVE
PUSHED LAKE BREEZE TIMING BACK A LITTLE FROM PREVIOUS FORECAST
BASED ON LATE DEVELOPMENT AND LACK OF MODEL CONSISTENCY IN
BRINGING THE BOUNDARY THROUGH THE AIRPORTS. WINDS SHOULD SETTLE
BACK TO A LIGHT SOUTH-SOUTHWEST THIS EVENING.

EARLY AFTERNOON VISIBLE SATELLITE IMAGERY DEPICTS CU FIELD ACROSS
NORTHEAST IL/NORTHWEST IN...WITH SPC MESOANALYSIS AND MODIFIED
AMDAR AIRCRAFT SOUNDINGS INDICATING WEAK INSTABILITY PRESENT.
CONVECTION-ALLOWING MODEL GUIDANCE DOES HINT AT SOME ENHANCED CU
OR ISOLATED WEAK SHRA/TSRA FORMING ALONG THE LAKE BREEZE THIS
AFTERNOON...THOUGH CONFIDENCE AND COVERAGE TOO MINIMAL TO INCLUDE
IN POINT FORECASTS AT THIS TIME. A BETTER POTENTIAL FOR SCATTERED
TSRA APPEARS TO BE AHEAD OF THE COLD FRONT OVERNIGHT...THOUGH LATE
NIGHT TIMING DOES NOT FAVOR HIGH COVERAGE/PROBABILITY. TIMING FROM
PREVIOUS FORECAST STILL APPEARS REASONABLE...THOUGH DOES NOT
WARRANT MORE THAN A PROB30 MENTION AT THIS DISTANCE...PENDING
UPSTREAM AFTERNOON DEVELOPMENT ACROSS MN/IA. COLD FROPA EARLY
TUESDAY MORNING EXPECTED TO SHIFT WINDS TO THE NORTH-NORTHEAST...
WITH GUSTS APPROACHING 20 KT DURING THE DAY. COULD BE A PERIOD OF
MVFR CIGS IN THE 1500-2000 FT RANGE FOR A TIME AS WINDS SHIFT OFF
OF THE LAKE ACROSS ORD/MDW/GYY.

RATZER

//ORD AND MDW CONFIDENCE...UPDATED 20Z...

* MEDIUM-HIGH CONFIDENCE IN WIND DETAILS THIS AFTERNOON AND
  FRONTAL TIMING TUESDAY MORNING.

* LOW CONFIDENCE IN TSRA OVERNIGHT.

* MEDIUM CONFIDENCE IN A PERIOD OF MVFR CIGS TUESDAY MORNING.

RATZER

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

TUESDAY NIGHT...GUSTY NORTH WINDS EARLY.  OTHERWISE...VFR.

WEDNESDAY AND THURSDAY...VFR. WX NIL.

FRIDAY AND SATURDAY...CHANCE SHRA/TSRA.

SUNDAY...VFR. WX NIL.

KREIN

&&

.MARINE...
314 PM CDT

SIGNIFICANT CHANGES ARE EXPECTED OVER THE LAKE TONIGHT.  THE LOW
CURRENTLY OVER SOUTH CENTRAL ONTARIO WILL SLIDE NORTH OF THE GREAT
LAKES AND ITS COLD FRONT WILL SINK SOUTH DOWN THE LAKE TONIGHT.
WINDS WILL ABRUPTLY TURN NW TO N AND INCREASE TO 30 KT.  A FEW GALE
FORCE GUSTS ARE POSSIBLE BUT EXPECTING THEM TO BE VERY SPORADIC AND
SCATTERED THROUGH THE DAY TOMORROW. AS SUCH DID NOT INCLUDE GALES IN
ANY OF THE MARINE PRODUCTS.  THE FRONT SHOULD REACH THE SOUTHERN END
OF LAKE MICHIGAN BY EARLY TUESDAY MORNING.  WINDS AND WAVES WILL
INCREASE ACROSS THE LAKE THEREFORE ISSUED A SMALL CRAFT ADVISORY AND
A BEACH HAZARDS STATEMENT.  THE SCY BEGINS IN THE PREDAWN HOURS AND
GOES THROUGH WEDNESDAY AFTERNOON.  THE BEACH HAZARDS STATEMENT
BEGINS A FEW HOURS LATER AS THE WAVES INCREASE AND RIP CURRENTS ARE
LIKELY...HOWEVER IT ALSO GOES THROUGH WEDNESDAY AFTERNOON.

HIGH PRESSURE MOVES IN WEDNESDAY MORNING WITH WINDS DIMINISHING
ACROSS THE LAKE.  WAVES WILL TAKE A LITTLE LONGER TO SUBSIDE.  WINDS
BECOME SOUTH BUT REMAIN LIGHT THURSDAY.  ANOTHER LOW PASSES NORTH OF
THE LAKE THURSDAY AFTERNOON THROUGH FRIDAY WITH WINDS BECOMING NORTH
BEHIND THE LOW FRIDAY NIGHT THROUGH THE WEEKEND.

JEE

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...BEACH HAZARDS STATEMENT...ILZ006-ILZ014...9 AM TUESDAY TO 4 PM
     WEDNESDAY.

IN...BEACH HAZARDS STATEMENT...INZ001-INZ002...9 AM TUESDAY TO 4 PM
     WEDNESDAY.

LM...SMALL CRAFT ADVISORY...LMZ740-LMZ741-LMZ742-LMZ743-LMZ744-
     LMZ745...4 AM TUESDAY TO 4 PM WEDNESDAY.

&&

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

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
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WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO
Hazardous weather outlook, Jul 22, 3:38 PM CDT, 18 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
338 PM CDT MON JUL 22 2013

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
232045-
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-
338 PM CDT MON JUL 22 2013 /438 PM EDT MON JUL 22 2013/

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

.DAY ONE...TONIGHT.

  WEATHER HAZARDS EXPECTED:

  CHANCE OF THUNDERSTORMS...SOME COULD PRODUCE:
    HEAVY RAIN.
    CLOUD TO GROUND LIGHTNING.
    WIND GUSTS OVER 40 MPH.
    AND SMALL HAIL.

  AREAS AFFECTED AND TIMING:

  THERE IS A CHANCE OF A THUNDERSTORM THIS EVENING
  THROUGH TONIGHT OVER THE ENTIRE OUTLOOK AREA.

  DISCUSSION:

  A COLD FRONT HAS PUSHED INTO CENTRAL MINNESOTA STRETCHING
  NORTHEAST THROUGH WESTERN LAKE SUPERIOR. THIS FRONT WILL
  CONTINUE TO SLIDE SOUTHEAST TOWARDS NORTHERN ILLINOIS
  LATE TONIGHT WITH THE THREAT OF THUNDERSTORMS INCREASING
  AS THE FRONT APPROACHES THE REGION. THE COVERAGE AND
  INTENSITY OF THUNDERSTORMS IS EXPECTED TO BE DECREASING AS
  THEY APPROACH THE OUTLOOK AREA TONIGHT...HOWEVER THERE
  STILL IS A CHANCE OF THUNDERSTORMS ACROSS THE ENTIRE AREA.

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

THERE IS CHANCE OF THUNDERSTORMS OVER NORTHWEST INDIANA AND
SOUTHEAST OF INTERSTATE 55 IN ILLINOIS TUESDAY MORNING.

LARGE WAVES AND STRONG WINDS WILL CREATE EXTREMELY HAZARDOUS
SWIMMING CONDITIONS TUESDAY AND WEDNESDAY. IN ADDITION...THE
LARGE WAVES WILL LIKELY BREAK ALONG THE TYPICALLY VULNERABLE SHORE
LINE AREAS INCLUDING PORTIONS OF THE CHICAGO LAKE FRONT BIKE PATH
TUESDAY AFTERNOON THROUGH EARLY WEDNESDAY MORNING.

THERE WILL BE A CHANCE FOR THUNDERSTORMS FRIDAY THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT.

&&

LMZ740>745-232045-
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-
338 PM CDT MON JUL 22 2013

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

.DAY ONE...TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS TONIGHT.

STRONG WINDS AND HIGH WAVES WILL LEAD TO HAZARDOUS CONDITIONS FOR
SMALL CRAFT DURING THE PREDAWN HOURS.

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

THERE IS A SLIGHT CHANCE OF A THUNDERSTORM TUESDAY
MORNING...ESPECIALLY ALONG THE INDIANA SHORE.

STRONG WINDS AND HIGH WAVES WILL LEAD TO HAZARDOUS CONDITIONS FOR
SMALL CRAFT TUESDAY THROUGH WEDNESDAY AFTERNOON.

THERE IS A CHANCE FOR A ROUND OR TWO OF THUNDERSTORMS FRIDAY
AND SATURDAY.

&&

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-232045-
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-
338 PM CDT MON JUL 22 2013

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

.DAY ONE...TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS TONIGHT.

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

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS OVER THE FAR SOUTHERN
END OF THE LAKE TUESDAY MORNING.

THERE IS A CHANCE FOR A ROUND OR TWO OF THUNDERSTORMS THURSDAY
NIGHT THROUGH SATURDAY.

&&

JEE

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

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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 3:52 AM CDTLakeshore Flood StatementLOTLake25 hr
Jul 22, 3:10 PM CDTSmall Craft AdvisoryLOT54 hr

Nearby

Beach Hazards Statements in Indiana, 2013Beach Hazards Statements in Illinois, 2013Every beach hazards statement in 2013

Sources

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