Alert archive / Indiana / Flash Flood Warnings in 2014

Flash Flood Warning 26, NWS Chicago, IL

August 23, 2014Lake County, Indiana

NWS Chicago, IL issued this flash flood warning at Aug 23, 2014, 3:38 PM CDT for Lake County, Indiana. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 23, 2014, 3:38 PM CDT (20:38 UTC)
Expired: Aug 23, 2014, 9:30 PM CDT
In force: 6 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: None

County Lake County, IN

The radar

The Chicago radar (KLOT), 61 km from the middle of the area, began a volume at 20:42 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, 8.6 hours before the alert went out and 179 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2964 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 707 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning 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 flash flood warning went out at Aug 23, 3:29 PM CDT, 9 minutes earlier.

Area forecast discussion, Aug 23, 3:29 PM CDT, 9 minutes before

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Hazardous weather outlook, Aug 23, 11:00 AM CDT, 4 hours 38 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1100 AM CDT SAT AUG 23 2014

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
241600-
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-
1100 AM CDT SAT AUG 23 2014 /1200 PM EDT SAT AUG 23 2014/

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

  WEATHER HAZARDS EXPECTED:

   SCATTERED THUNDERSTORMS...SOME COULD PRODUCE:
    TORRENTIAL RAINFALL AND FLASH FLOODING.
    FREQUENT CLOUD TO GROUND LIGHTNING.
    WIND GUSTS OVER 40 MPH.

   AREAS AFFECTED AND TIMING:

   SCATTERED THUNDERSTORMS WITH SOME SPORADIC GUSTY WINDS AND VERY
   HEAVY RAINFALL WILL OCCUR ACROSS NORTH CENTRAL ILLINOIS EARLY
   THIS AFTERNOON AND BE POSSIBLE ACROSS NORTHEAST ILLINOIS AND
   NORTHWEST INDIANA THROUGH THE EVENING.

   DISCUSSION:

   AN AREAS OF STORMS WILL MOVE EASTWARD ACROSS NORTH CENTRAL
   ILLINOIS EARLY THIS AFTERNOON. WITH VERY HUMID AIR AHEAD OF
   THIS...AT LEAST SCATTERED STORMS SHOULD CONTINUE INTO PARTS OF
   NORTHEAST ILLINOIS AND POSSIBLY NORTHWEST INDIANA LATER THIS
   AFTERNOON. THE MAIN THREAT FROM ANY STORMS THAT DEVELOP WILL BE
   TORRENTIAL RAINFALL WHICH COULD LEAD TO LOCALIZED FLASH
   FLOODING.

FLOODING WILL CONTINUE ALONG PORTIONS OF THE DUPAGE AND MAZON
RIVERS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE IS A CHANCE OF THUNDERSTORMS MONDAY AFTERNOON THROUGH
FRIDAY. HEAVY RAIN AND FLASH FLOODING WILL BE POSSIBLE WITH ANY
THUNDERSTORMS THAT DEVELOP.

HEAT INDICES COULD EXCEED 100 DEGREES SUNDAY AND MONDAY
AFTERNOONS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT...HOWEVER
RAINFALL MEASUREMENTS ARE APPRECIATED.

&&

LMZ740>745-241600-
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-
1100 AM CDT SAT AUG 23 2014

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.

AREAS OF DENSE FOG ARE POSSIBLE...PRIMARILY ALONG THE ILLINOIS
NEARSHORE EARLY THIS AFTERNOON.

THERE IS A CHANCE OF THUNDERSTORMS THROUGH THIS EVENING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE IS A CHANCE OF THUNDERSTORMS MONDAY AFTERNOON THROUGH
FRIDAY.

&&

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-241600-
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-
1100 AM CDT SAT AUG 23 2014

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS MAINLY ACROSS SOUTHERN
PORTIONS OF THE LAKE THIS AFTERNOON AND CENTRAL AND SOUTHERN
PORTIONS OF THE LAKE TONIGHT.

PATCHY DENSE FOG IS POSSIBLE...ESPECIALLY OVER WESTERN PORTIONS OF
THE LAKE.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE IS A CHANCE OF THUNDERSTORMS MONDAY THROUGH FRIDAY.

&&

MTF

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

In the hours before

Local storm report, Aug 23, 2:15 PM CDT, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
215 PM CDT SAT AUG 23 2014

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

0214 PM     HEAVY RAIN       DES PLAINES             42.03N 87.90W
08/23/2014  M1.20 INCH       COOK               IL   TRAINED SPOTTER

            1.2 INCHES IN APPROX 10 MINUTES NEAR RAND ROAD AND THOMAS
            AVE.

&&

BMD

Local storm report, Aug 23, 2:18 PM CDT, 1 hour 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
218 PM CDT SAT AUG 23 2014

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

0211 PM     HEAVY RAIN       CRYSTAL LAKE            42.23N 88.33W
08/23/2014  M1.48 INCH       MCHENRY            IL   AMATEUR RADIO

            NEAR WALKUP AND CRYSTAL SPRINGS ROAD.

&&

C

Local storm report, Aug 23, 2:29 PM CDT, 1 hour 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
229 PM CDT SAT AUG 23 2014

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

0228 PM     FLOOD            ROMEOVILLE              41.65N 88.09W
08/23/2014                   WILL               IL   NWS EMPLOYEE

            ROUTE 53 IS NEARLY IMPASSABLE IN A COUPLE AREAS INCLUDING
            NEAR LEWIS UNIVERSITY AND NEAR ROMEOVILLE H.S.

&&

BMD

Local storm report, Aug 23, 2:52 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
252 PM CDT SAT AUG 23 2014

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

0235 PM     MARINE TSTM WIND 4 NE CHICAGO            41.92N 87.57W
08/23/2014  M49 MPH          LMZ741             IL   C-MAN STATION

            WINDS GUSTED OVER 34 KT FOR 10 MINUTES...PEAKING AT 43
            KT.

&&

BMD

Local storm report, Aug 23, 2:57 PM CDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
257 PM CDT SAT AUG 23 2014

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

0248 PM     HEAVY RAIN       1 N NORRIDGE            41.98N 87.82W
08/23/2014  M1.02 INCH       COOK               IL   BROADCAST MEDIA

            ALSO BACKYARDS WITH MINOR FLOODING.

&&

C

Local storm report, Aug 23, 3:18 PM CDT, 20 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 22, 8:14 PM CDT	River Flood Advisory	LOT	Cook	36 hr
Aug 23, 4:47 AM CDT	Dense Fog Advisory	LOT	Boone, Lake, McHenry, Winnebago	4 hr
Aug 23, 6:44 AM CDT	River Flood Advisory	LOT	Grundy	25 hr
Aug 23, 9:10 AM CDT	Marine Dense Fog Advisory	LOT		12 hr
Aug 23, 9:27 AM CDT	River Flood Warning	LOT	Grundy	12 hr
Aug 23, 1:42 PM CDT	Areal Flood Advisory	LOT	Cook, Ford, Iroquois, Kankakee, Will	4 hr
Aug 23, 1:53 PM CDT	Areal Flood Advisory	LOT	Cook, Lake	4 hr
Aug 23, 2:07 PM CDT	Special Weather Statement	LOT	Cook, Lake	38 min
Aug 23, 2:22 PM CDT	Special Marine Warning	LOT		83 min
Aug 23, 4:28 PM CDT	River Flood Warning	LOT	Lake	9 hr

Nearby

Flash Flood Warnings in Indiana, 2014 Every flash flood warning in 2014

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.