Alert archive / Illinois / Small Craft Advisories in 2011

Small Craft Advisory 67, NWS Chicago, IL

August 9, 2011

NWS Chicago, IL issued this small craft advisory at Aug 9, 2011, 3:13 AM CDT. It took effect at Aug 9, 2011, 2:12 PM CDT. It was in force for 28 hr.

The area

The counties it named.

The facts

Issued: Aug 9, 2011, 3:13 AM CDT (08:13 UTC)
In effect from: Aug 9, 2011, 2:12 PM CDT
Expired: Aug 10, 2011, 6:00 PM CDT
In force: 28 hr
Issued by: NWS Chicago, IL

What forecasters said that day

The local office's own words before this small craft advisory 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 small craft advisory went out at Aug 9, 3:05 AM CDT, 8 minutes earlier.

Area forecast discussion, Aug 9, 3:05 AM CDT, 8 minutes before

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Hazardous weather outlook, Aug 8, 3:51 PM CDT, 11 hours 22 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
351 PM CDT MON AUG 8 2011

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
092100-
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-
351 PM CDT MON AUG 8 2011 /451 PM EDT MON AUG 8 2011/

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

.DAY ONE...TONIGHT.

 WEATHER HAZARDS EXPECTED:

 THUNDERSTORMS...THE STRONGEST MAY PRODUCE:

  WIND GUSTS TO 60 MPH.
  HAIL TO 1 INCH IN DIAMETER.
  FREQUENT LIGHTNING.
  LOCALLY HEAVY RAINFALL IN EXCESS OF AN INCH.

 AREAS AFFECTED AND TIMING:

  THUNDERSTORMS WERE ONGOING ACROSS MUCH OF NORTHERN ILLINOIS THIS
  AFTERNOON. SCATTERED THUNDERSTORMS WILL LIKELY SPREAD INTO
  NORTHWEST INDIANA DURING THE REMAINDER OF THE LATE AFTERNOON
  HOURS. THOUGH STORMS WILL LIKELY BECOME LESS INTENSE THIS
  EVENING...SCATTERED THUNDERSTORMS WILL LIKELY CONTINUE THROUGH
  EARLY EVENING ACROSS NORTHERN ILLINOIS...AND THROUGH MID TO LATE
  EVENING IN NORTHWEST INDIANA.

DISCUSSION:

  A MID LEVEL DISTURBANCE CONTINUES TO TRACK FROM IOWA INTO
  NORTHERN ILLINOIS THIS AFTERNOON...AND WILL CONTINUE TO PRODUCE
  RELATIVELY WIDESPREAD SHOWERS AND THUNDERSTORMS FROM WEST TO
  EAST ACROSS THE AREA INTO THIS EVENING. THE LOSS OF DAYTIME
  WARMTH SHOULD ALLOW FOR STORMS TO DIMINISH IN INTENSITY A BIT BY
  EARLY EVENING... THOUGH SCATTERED THUNDERSTORMS WILL LIKELY
  CONTINUE UNTIL THE MID LEVEL CIRCULATION CENTER PASSES LATER
  THIS EVENING. SUFFICIENT SHEAR AND INSTABILITY DOES EXIST TO
  PRESENT A MARGINAL THREAT OF SEVERE WEATHER FROM THE STRONGEST
  STORMS THIS AFTERNOON INTO EARLY THIS EVENING...WITH DAMAGING
  WINDS AND HAIL UP TO 1 INCH IN DIAMETER POSSIBLE WITH THE
  DEEPEST UPDRAFTS PARTICULARLY SOUTH OF AN APPROXIMATELY POLO TO
  KANKAKEE AND RENSSELAER LINE. LOCALLY HEAVY RAINFALL WILL BE
  POSSIBLE ACROSS THE REGION...WITH SOME LOCATIONS PICKING UP AN
  INCH OF RAINFALL OR MORE.

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

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS TUESDAY...AND ANOTHER
CHANCE OF THUNDERSTORMS AGAIN FRIDAY INTO SATURDAY.

THERE IS AN INCREASED THREAT FOR RIP CURRENTS TUESDAY NIGHT AND
WEDNESDAY...ESPECIALLY FOR THE INDIANA SHORE OF LAKE MICHIGAN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT LIKELY BE NECESSARY TONIGHT...THOUGH
REPORTS OF HAIL...WIND OR HEAVY RAINFALL ARE ENCOURAGED.

&&

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

LMZ740>745-092100-
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-
351 PM CDT MON AUG 8 2011

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

.DAY ONE...TONIGHT.

THUNDERSTORMS ARE LIKELY THIS EVENING ACROSS THE ILLINOIS AND
INDIANA NEARSHORE WATERS. SOME STORMS MAY PRODUCE WIND GUSTS IN
EXCESS OF 35 KNOTS...ALONG WITH FREQUENT LIGHTNING AND HEAVY
DOWNPOURS.

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

STRONG WINDS AND HIGH WAVES MAY PRODUCE HAZARDOUS CONDITIONS FOR
SMALL CRAFT ALONG THE INDIANA SHORE TUESDAY NIGHT AND WEDNESDAY.

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS TUESDAY...AND ANOTHER
CHANCE OF THUNDERSTORMS FRIDAY INTO 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-
870-872-874-876-878-092100-
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-
351 PM CDT MON AUG 8 2011

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

.DAY ONE...TONIGHT.

THUNDERSTORMS ARE LIKELY OVER FAR SOUTHERN LAKE MICHIGAN THIS
EVENING. SOME STORMS MAY BE CAPABLE OF PRODUCING WIND GUSTS OVER
25 KNOTS.

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

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS ACROSS MUCH OF THE LAKE
TUESDAY...AND THERE WILL BE ANOTHER CHANCE OF THUNDERSTORMS
FRIDAY AND SATURDAY.

&&

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

RATZER

In the hours before

Local storm report, Aug 8, 9:19 PM CDT, 5 hours 54 minutes before

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Local storm report, Aug 8, 10:11 PM CDT, 5 hours 2 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 7:29 PM CDT	Tornado Warning	LOT	Ford, Iroquois, Livingston	34 min
Aug 8, 8:37 PM CDT	Areal Flood Advisory	LOT	Winnebago	2 hr
Aug 8, 8:11 PM CDT	Special Weather Statement	LOT	Jasper, Newton	64 min
Aug 9, 3:49 AM CDT	Rip Current Statement	LOT	Lake, Porter	38 hr

Nearby

Small Craft Advisories in Illinois, 2011 Every small craft advisory in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.