Alert archive / Illinois / Small Craft Advisories in 2011

Small Craft Advisory 39, NWS Chicago, IL

April 19, 2011

NWS Chicago, IL issued this small craft advisory at Apr 19, 2011, 9:26 PM CDT. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued: Apr 19, 2011, 9:26 PM CDT (02:26 UTC)
Expired: Apr 20, 2011, 6:00 PM CDT
In force: 21 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 Apr 19, 9:14 PM CDT, 12 minutes earlier.

Area forecast discussion, Apr 19, 9:14 PM CDT, 12 minutes before

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Hazardous weather outlook, Apr 19, 3:52 PM CDT, 5 hours 34 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
352 PM CDT TUE APR 19 2011

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
202100-
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-
352 PM CDT TUE APR 19 2011 /452 PM EDT TUE APR 19 2011/

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

.DAY ONE...TONIGHT.

  WEATHER HAZARDS EXPECTED:

  ISOLATED THUNDERSTORMS...A FEW MAY PRODUCE:
  HAIL TO ONE INCH.
  DAMAGING WIND GUSTS IN EXCESS OF 60 MPH.
  LOCALLY HEAVY RAINFALL.
  CLOUD TO GROUND LIGHTNING.
  MODERATE RAINFALL AND BRIEF HEAVY DOWNPOURS.

  AREAS AFFECTED AND TIMING:

  ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TO CONTINUE
  THROUGH THE LATE EVENING HOURS. THE MOST EXTENSIVE THUNDERSTORM
  COVERAGE WILL MAINLY BE SOUTH OF INTERSTATE 80...WITH COVERAGE
  MORE ISOLATED NORTH OF INTERSTATE 80. THE GREATEST POTENTIAL FOR
  SEVERE THUNDERSTORMS WILL BE ALONG AND SOUTH OF A LINE FROM
  PONTIAC TO KANKAKEE TO CHESTERTON.

  DISCUSSION:

  AN AREA OF LOW PRESSURE CONTINUES TO DEEPEN AS IT APPROACHES ST.
  LOUIS. THE LOW IS EXPECTED TO CONTINUE TO STRENGTHEN AS IT LIFTS
  NORTHEAST INTO WEST-CENTRAL INDIANA BY EARLY THIS EVENING. THIS
  LOW PRESSURE SYSTEM WILL SERVE AS THE FOCAL POINT FOR
  THUNDERSTORM DEVELOPMENT ALONG AND SOUTH OF AN ASSOCIATED WARM
  FRONT THROUGH LATE THIS EVENING.

  SOME OF THE THUNDERSTORMS THAT DEVELOP AHEAD OF THE LOW WILL BE
  CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS. WARM AIR
  OVERRUNNING THE WARM FRONT MAY ACT TO LIMIT THUNDERSTORM
  DEVELOPMENT DURING THE LATE AFTERNOON HOURS. WITH VERY STRONG
  UPPER LEVEL WINDS...IT IS EXPECTED THAT CONVECTION MAY...AT
  ONSET...BEGIN AS ISOLATED CELLS AND THEN DEVELOP INTO LINE
  SEGMENTS AHEAD OF THE COLD FRONT. WHILE THE MAIN THREATS
  CONTINUE TO BE LARGE HAIL AND DAMAGING WINDS...ISOLATED
  TORNADOES CAN NOT BE RULED OUT FOR FAR SOUTHEASTERN PORTIONS OF
  THE OUTLOOK AREA. THUNDERSTORMS ARE EXPECTED TO MOVE EAST OF THE
  OUTLOOK AREA SHORTLY BY MIDNIGHT.

  IN ADDITION TO THE SEVERE WEATHER THREAT...MODERATE TO LOCALLY
  HEAVY RAINFALL IS POSSIBLE. THE ATMOSPHERE REMAINS SATURATED
  WITH AMPLE MOISTURE OVER THE OUTLOOK AREA. THE KANKAKEE
  RIVER...IROQUOIS RIVER AND SUGAR CREEK BASINS WILL BE
  PARTICULARLY VULNERABLE TO FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THUNDERSTORMS WILL BE POSSIBLE AGAIN FRIDAY THROUGH SATURDAY.

GIVEN ONLY A BRIEF PERIOD OF DRY WEATHER EXPECTED WEDNESDAY AND
THURSDAY AND MORE RAIN LIKELY BY FRIDAY AND INTO THE WEEKEND...THE
GROUND WILL REMAIN SATURATED WITH LITTLE ADDITIONAL CAPACITY.
ALSO...AREA RIVERS THAT REACH FLOOD LEVEL EARLY IN THE FORECAST
PERIOD WILL HAVE LITTLE OPPORTUNITY TO RECEDE. AREA RIVERS WILL
NEED TO BE MONITORED FOR POSSIBLE ADDITIONAL FLOODING. THE
POTENTIAL FOR AREAL FLOODING AWAY FROM RIVERS WILL ALSO NEED TO BE
MONITORED CLOSELY AS WELL.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY THROUGH LATE THIS EVENING.

&&

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

LMZ740>745-202100-
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-
352 PM CDT TUE APR 19 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.

NORTHEAST GALES TO 35KT ARE EXPECTED THROUGH LATE THIS EVENING.

THERE IS A CHANCE OF THUNDERSTORMS UNTIL AROUND MIDNIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

STRONG WINDS AND HIGH WAVES MAY LEAD TO HAZARDOUS CONDITIONS FOR
SMALL CRAFT FRIDAY.

THUNDERSTORMS ARE POSSIBLE FRIDAY AFTERNOON THROUGH SATURDAY
MORNING.

&&

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-
870-872-874-876-878-202100-
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-
352 PM CDT TUE APR 19 2011

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

.DAY ONE...TONIGHT.

GALE FORCE WINDS ARE LIKELY THIS AFTERNOON THROUGH EARLY
EVENING FOR THE SOUTHERN HALF OF LAKE MICHIGAN.

GALE FORCE WINDS ARE EXPECTED TO DEVELOP TONIGHT FOR NORTHERN
LAKE MICHIGAN.

THERE IS A CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT FOR THE
SOUTHERN PORTIONS OF LAKE MICHIGAN.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

GALE FORCE WINDS ARE EXPECTED TO CONTINUE THROUGH WEDNESDAY
MORNING FOR NORTHERN LAKE MICHIGAN.

THUNDERSTORMS ARE POSSIBLE OVER SOUTHERN LAKE MICHIGAN FRIDAY AND
FRIDAY NIGHT.

&&

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

KREIN

In the hours before

Local storm report, Apr 19, 8:05 PM CDT, 1 hour 21 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
805 PM CDT TUE APR 19 2011

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

0421 PM     HAIL             2 N WINNEBAGO           42.30N 89.24W
04/19/2011  E0.25 INCH       WINNEBAGO          IL   BROADCAST MEDIA

0437 PM     HAIL             3 NNW LOVES PARK        42.38N 89.03W
04/19/2011  E0.25 INCH       WINNEBAGO          IL   TRAINED SPOTTER

            INTERSECTION OF ANVIL ROAD AND RT 251

0522 PM     HAIL             2 N WINNEBAGO           42.30N 89.24W
04/19/2011  M0.88 INCH       WINNEBAGO          IL   BROADCAST MEDIA

            A FEW DIME TO NICKEL SIZED HAIL STONES...MOSTLY SMALLER
            AT WREX STUDIO.

0533 PM     HAIL             MACHESNEY PARK          42.36N 89.04W
04/19/2011  E0.75 INCH       WINNEBAGO          IL   TRAINED SPOTTER

            MOST STONES 0.25 TO 0.50 INCH WITH A FEW CLOSE TO 0.75
            INCH.

0536 PM     HAIL             ROCKTON                 42.45N 89.07W
04/19/2011  E0.75 INCH       WINNEBAGO          IL   EMERGENCY MNGR

            AT HONONEGAH RD. AND IL RT. 75.

0537 PM     HAIL             1 ESE WINNEBAGO         42.26N 89.22W
04/19/2011  E0.50 INCH       WINNEBAGO          IL   TRAINED SPOTTER

            COCORAHS OBSERVER.

0545 PM     HAIL             ROCKTON                 42.45N 89.07W
04/19/2011  M0.88 INCH       WINNEBAGO          IL   BROADCAST MEDIA

            NICKEL SIZED HAIL IN THE CITY OF ROCKTON. RELAYED FROM
            WREX.

0557 PM     HAIL             WADSWORTH               42.44N 87.92W
04/19/2011  M0.25 INCH       LAKE               IL   BROADCAST MEDIA

0630 PM     HAIL             2 W PERU                41.34N 89.17W
04/19/2011  M1.00 INCH       LA SALLE           IL   TRAINED SPOTTER

            MOSTLY PEA TO PENNY SIZED HAIL WITH A COUPLE AS LARGE AS
            ONE INCH

0633 PM     HAIL             2 NW DE KALB            41.95N 88.78W
04/19/2011  E0.75 INCH       DEKALB             IL   TRAINED SPOTTER

            PEA TO DIME SIZED HAIL.

0633 PM     HAIL             SYCAMORE                41.98N 88.70W
04/19/2011  E0.25 INCH       DE KALB            IL   TRAINED SPOTTER

0640 PM     HAIL             2 NNE DE KALB           41.96N 88.74W
04/19/2011  E0.25 INCH       DEKALB             IL   TRAINED SPOTTER

            COCORAHS OBSERVER.

0659 PM     HAIL             WINFIELD                41.87N 88.15W
04/19/2011  M0.50 INCH       DUPAGE             IL   EMERGENCY MNGR

            HAIL COVERING THE GROUND

0701 PM     HAIL             BARTLETT                41.98N 88.21W
04/19/2011  E0.75 INCH       DUPAGE             IL   TRAINED SPOTTER

            PEA TO DIME SIZED HAIL NEAR PROSPECT AND DEVON. COCORAHS
            OBSERVER

0704 PM     HAIL             GLENDALE HEIGHTS        41.92N 88.08W
04/19/2011  M0.75 INCH       DUPAGE             IL   TRAINED SPOTTER

            UP TO DIME SIZE HAIL

0705 PM     HAIL             3 ESE NAPERVILLE        41.75N 88.10W
04/19/2011  E0.25 INCH       DUPAGE             IL   TRAINED SPOTTER

            COCORAHS OBSERVER.

0706 PM     HAIL             1 NE NAPERVILLE         41.77N 88.14W
04/19/2011  M0.75 INCH       DUPAGE             IL   TRAINED SPOTTER

            DIME SIZED HAIL NEAR HOBSON ROAD

0712 PM     HAIL             ST. CHARLES             41.92N 88.30W
04/19/2011  E0.25 INCH       KANE               IL   NWS EMPLOYEE

0712 PM     HAIL             MENDOTA                 41.55N 89.12W
04/19/2011  E0.25 INCH       LA SALLE           IL   TRAINED SPOTTER

0715 PM     HAIL             ARLINGTON HEIGHTS       42.09N 87.98W
04/19/2011  M0.88 INCH       COOK               IL   TRAINED SPOTTER

0718 PM     HAIL             NORTH AURORA            41.80N 88.33W
04/19/2011  M0.25 INCH       KANE               IL   NWS EMPLOYEE

0719 PM     HAIL             ELMHURST                41.90N 87.94W
04/19/2011  M0.75 INCH       DUPAGE             IL   TRAINED SPOTTER

0720 PM     HAIL             PALATINE                42.11N 88.04W
04/19/2011  E0.25 INCH       COOK               IL   TRAINED SPOTTER

0730 PM     HAIL             5 NNW CAROL STREAM      41.99N 88.17W
04/19/2011  M0.25 INCH       DUPAGE             IL   TRAINED SPOTTER

0734 PM     HAIL             NILES                   42.03N 87.81W
04/19/2011  E0.25 INCH       COOK               IL   TRAINED SPOTTER

            LEHIGH AND TOUHY AVE.

0734 PM     HAIL             SCHAUMBURG              42.03N 88.08W
04/19/2011  E0.88 INCH       COOK               IL   PUBLIC

            INTERSECTION OF PLUMB GROVE RD AND SCHAUMBURG RD.

0738 PM     HEAVY RAIN       ST. CHARLES             41.92N 88.30W
04/19/2011  M0.99 INCH       KANE               IL   NWS EMPLOYEE

            MEASURED 0.99 INCHES IN 15 MINUTES.

0745 PM     HEAVY RAIN       PERU                    41.34N 89.13W
04/19/2011  M1.50 INCH       LA SALLE           IL   CO-OP OBSERVER

            TOTAL SINCE 7AM WITH 1.00 IN LAST 2 HOURS.

&&

SSHEA

Local storm report, Apr 19, 8:31 PM CDT, 55 minutes before

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Local storm report, Apr 19, 8:43 PM CDT, 43 minutes before

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Local storm report, Apr 19, 9:16 PM CDT, 10 minutes before

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Local storm report, Apr 19, 9:20 PM CDT, 6 minutes before

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Local storm report, Apr 19, 9:25 PM CDT, 1 minute 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
Apr 19, 7:08 PM CDT	Special Marine Warning	LOT		52 min
Apr 19, 7:23 PM CDT	Special Weather Statement	LOT	Cook, Lake	22 min
Apr 19, 7:39 PM CDT	Special Weather Statement	LOT	Grundy	36 min
Apr 19, 7:45 PM CDT	Severe Thunderstorm Warning	LOT	Ford, Iroquois	60 min
Apr 19, 7:59 PM CDT	Areal Flood Advisory	LOT	Cook, DuPage, Will	4 hr
Apr 19, 7:59 PM CDT	Special Marine Warning	LOT		2 hr
Apr 19, 8:15 PM CDT	Severe Thunderstorm Warning	LOT	Iroquois, Kankakee, Will	60 min
Apr 19, 9:36 PM CDT	River Flood Advisory	LOT	Kane, Kendall	7 days
Apr 19, 9:36 PM CDT	River Flood Advisory	LOT	Iroquois	48 hr
Apr 19, 10:01 PM CDT	Special Marine Warning	LOT		119 min
Apr 20, 11:02 AM CDT	River Flood Advisory	LOT	Lake	3 days
Apr 20, 11:02 AM CDT	River Flood Advisory	LOT	Lake	34 hr
Apr 20, 11:02 AM CDT	River Flood Advisory	LOT	Lake	48 hr
Apr 20, 11:02 AM CDT	River Flood Advisory	LOT	Cook	38 hr
Apr 20, 11:02 AM CDT	River Flood Advisory	LOT	Will	18 hr
Apr 20, 11:02 AM CDT	River Flood Advisory	LOT	LaSalle	24 hr
Apr 20, 11:14 AM CDT	River Flood Warning	LOT	Bureau, LaSalle	19 days
Apr 20, 11:16 AM CDT	River Flood Advisory	LOT	Grundy	24 hr
Apr 20, 11:16 AM CDT	River Flood Advisory	LOT	LaSalle	59 hr
Apr 19, 9:27 PM CDT	River Flood Warning	LOT	Lake, Newton	35 days

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.