Alert archive / Indiana / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 115, NWS Chicago, IL

August 26, 2014Benton County, Indiana

NWS Chicago, IL issued this severe thunderstorm warning at Aug 26, 2014, 2:42 PM EDT for Benton County, Indiana. It was in force for 33 min. 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 26, 2014, 2:42 PM EDT (18:42 UTC)
Expired
Aug 26, 2014, 3:15 PM EDT
In force
33 min
Issued by
NWS Chicago, IL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Benton County, IN

The radar

The Chicago radar (KLOT), 129 km from the middle of the area, began a volume at 18:42 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, 6.7 hours before the alert went out and 120 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 2014-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2288 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 2014-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -50 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
2288 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1037 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
-50 m²/s²
0-3 km storm-relative helicity
26 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 severe thunderstorm 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 severe thunderstorm warning went out at Aug 26, 1:41 PM EDT, 1 hour 1 minute earlier.

Area forecast discussion, Aug 26, 1:41 PM EDT, 1 hour 1 minute before
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Hazardous weather outlook, Aug 26, 12:02 PM EDT, 2 hours 40 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1102 AM CDT TUE AUG 26 2014

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
271615-
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-
1102 AM CDT TUE AUG 26 2014 /1202 PM EDT TUE AUG 26 2014/

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

  WEATHER HAZARDS EXPECTED:

  THUNDERSTORMS WHICH MAY PRODUCE...
   TORRENTIAL RAINFALL AND FLASH FLOODING.
   WIND GUSTS IN EXCESS OF 50 MPH.
   FREQUENT CLOUD TO GROUND LIGHTNING.
   SMALL HAIL.

  AREAS AFFECTED AND TIMING:

  THUNDERSTORMS WILL CONTINUE TO BE POSSIBLE THROUGH THE AFTERNOON
  AND TONIGHT ACROSS THE ENTIRE OUTLOOK AREA. CHANCES WILL DIMINISH
  ACROSS FAR NORTHERN ILLINOIS LATER THIS AFTERNOON.
  THUNDERSTORM CHANCES WILL AGAIN INCREASE FROM WEST TO EAST LATER
  TONIGHT.

  DISCUSSION:

  A COLD FRONT CONTINUES TO SLIDE SOUTH ACROSS NORTHERN ILLINOIS.
  THE FRONT...ALONG WITH SEVERAL OTHER UPPER LEVEL
  FEATURES...WILL DRIVE THUNDERSTORM DEVELOPMENT THROUGH THE DAY.
  STORMS CURRENTLY ONGOING ACROSS NORTHERN ILLINOIS THIS MORNING
  WILL CONTINUE TO MOVE EAST TO SLIGHTLY SOUTHEAST THROUGH
  EARLY THIS AFTERNOON. ISOLATED TO SCATTERED THUNDERSTORMS ARE STILL
  EXPECTED ACROSS THE AREA INTO THE AFTERNOON.

  ADDITIONAL THUNDERSTORMS ARE EXPECTED TO AFFECT THE AREA LATER
  TONIGHT. TORRENTIAL RAINFALL AND FLASH FLOODING WILL BE POSSIBLE
  WITH THE STORMS THROUGH TONIGHT. GUSTY STRAIGHT LINE WINDS ARE
  AN ADDITIONAL THREAT WITH A FEW WIND GUSTS REACHING SEVERE
  LEVELS NOT OUT OF THE QUESTION BUT THE SEVERE THREAT IS LOW.

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

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

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ACTIVATION MAY BE NEEDED THROUGH THIS AFTERNOON AND
AGAIN TONIGHT.

&&

LMZ740>745-271615-
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-
1102 AM CDT TUE AUG 26 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.

THERE IS A CHANCE OF THUNDERSTORMS...SOME OF WHICH MAY PRODUCE
WIND GUSTS IN EXCESS OF 40 KNOTS.

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

THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY THROUGH MONDAY.

&&

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-271615-
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-
1102 AM CDT TUE AUG 26 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 WITH THE BEST CHANCE ACROSS
SOUTHERN LAKE MICHIGAN. SOME THUNDERSTORMS MAY PRODUCE GUSTS IN
EXCESS OF 40 KNOTS.

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

THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY THROUGH MONDAY.

&&

BEACHLER

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 26, 12:54 PM EDT, 1 hour 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1154 AM CDT TUE AUG 26 2014

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

1110 AM     MARINE TSTM WIND 4 NE CHICAGO            41.92N 87.57W
08/26/2014  M44 MPH          LMZ741             IL   C-MAN STATION

            HARRISON-DEVER CRIB

&&

RODRIGUEZ
Special weather statement, Aug 26, 1:01 PM EDT, 1 hour 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1201 PM CDT TUE AUG 26 2014

INZ001-002-261745-
LAKE IN-PORTER IN-
1201 PM CDT TUE AUG 26 2014

...SPECIAL WEATHER STATEMENT...

AT 1157 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THE LEADING EDGE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM
PORTER TO VALPARAISO TO KOUTS...MOVING EAST AT 25 MPH. THE STRONG
STORMS EXTENDED WEST INTO CENTRAL LAKE COUNTY.

ONE HALF INCH DIAMETER HAIL...WINDS TO 50 MPH...FREQUENT CLOUD TO
GROUND LIGHTNING AND TORRENTIAL DOWNPOURS...CAN BE EXPECTED WITH
THESE STORMS.

CITIES AND TOWNS AFFECTED...
  CHESTERTON...         PORTER...             KOUTS...
  MALDEN...             VALPARAISO...         BURNS HARBOR...
  SOUTH HAVEN...        LINCOLN HILLS...      BOONE GROVE...

OTHER LOCATIONS AFFECTED...
INDIANA DUNES STATE PARK...PORTER COUNTY FAIRGROUNDS...VALPARAISO
UNIVERSITY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS 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 THESE
STORMS HAVE PASSED.

&&

LAT...LON 4171 8693 4124 8693 4122 8697 4127 8706
      4129 8712 4127 8719 4125 8722 4128 8722
      4128 8729 4163 8729 4163 8722 4166 8715
      4166 8710 4171 8693 4173 8691
TIME...MOT...LOC 1700Z 279DEG 20KT 4165 8702 4150 8695
          4133 8696

RC
Local storm report, Aug 26, 1:17 PM EDT, 1 hour 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1217 PM CDT TUE AUG 26 2014

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

1100 AM     HEAVY RAIN       2 NNE HARWOOD HEIGHTS   41.99N 87.79W
08/26/2014  M0.45 INCH       COOK               IL   COCORAHS

            RAIN FELL IN 15 MINUTES.

&&

C
Local storm report, Aug 26, 1:19 PM EDT, 1 hour 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1219 PM CDT TUE AUG 26 2014

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

1154 AM     HAIL             1 SW CHESTERTON         41.60N 87.07W
08/26/2014  E0.25 INCH       PORTER             IN   AMATEUR RADIO

&&

C
Special weather statement, Aug 26, 1:22 PM EDT, 1 hour 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1222 PM CDT TUE AUG 26 2014

ILZ023-033-INZ001-010-011-261815-
IROQUOIS IL-JASPER IN-KANKAKEE IL-LAKE IN-NEWTON IN-
1222 PM CDT TUE AUG 26 2014

...SCATTERED STRONG STORMS IN EAST CENTRAL ILLINOIS AND NORTHWEST
INDIANA...

AT 1216 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SCATTERED STRONG THUNDERSTORMS FROM NORTHEAST IROQUOIS COUNTY INTO
JASPER COUNTY...MOVING SLOWLY EAST AT 15 TO 20 MPH.

UP TO PENNY SIZE HAIL...WINDS TO 50 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING...AND TORRENTIAL DOWNPOURS...CAN BE EXPECTED WITH THE
STRONGEST STORMS.

CITIES AND TOWNS AFFECTED...
  SHELDON...            ST. ANNE...           RAUB...
  KENTLAND...           HOPKINS PARK...       MOROCCO...
  PERKINS...            BEAVER CITY...        ENOS...
  RENSSELAER...         DE MOTTE...           MOROCCO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS 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 4091 8698 4084 8699 4083 8709 4074 8710
      4073 8726 4076 8727 4073 8741 4074 8753
      4071 8753 4068 8772 4116 8775 4127 8729
      4126 8722 4125 8722 4129 8713 4127 8706
      4122 8697 4123 8692 4091 8693
TIME...MOT...LOC 1722Z 248DEG 14KT 4088 8761

RC
Local storm report, Aug 26, 1:29 PM EDT, 1 hour 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1229 PM CDT TUE AUG 26 2014

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

1220 PM     HEAVY RAIN       1 NE VALPARAISO         41.49N 87.04W
08/26/2014  M1.00 INCH       PORTER             IN   COCORAHS

            RAIN FELL IN 15 MINUTES. STILL RAINING. REPORT AT
            VALPARAISO UNIVERSITY.

&&

C

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 9:39 AM EDTSpecial Weather StatementLOTOgle36 min
Aug 26, 9:49 AM EDTSpecial Weather StatementLOTGrundy, Kankakee, Will56 min
Aug 26, 10:06 AM EDTSpecial Weather StatementLOTOgle, Winnebago39 min
Aug 26, 10:20 AM EDTAreal Flood AdvisoryLOTOgle, Winnebago3 hr
Aug 26, 10:26 AM EDTSevere Thunderstorm WarningLOTBoone, DeKalb, McHenry, Ogle, Winnebago49 min
Aug 26, 10:38 AM EDTSpecial Weather StatementLOTLee22 min
Aug 26, 10:49 AM EDTSpecial Weather StatementLOTKankakee, Will56 min
Aug 26, 10:59 AM EDTSevere Thunderstorm WarningLOTCook, Kane, Lake, McHenry46 min
Aug 26, 11:03 AM EDTSpecial Marine WarningLOT117 min
Aug 26, 11:08 AM EDTSpecial Weather StatementLOTLee22 min
Aug 26, 11:18 AM EDTSpecial Weather StatementLOTDuPage27 min
Aug 26, 11:21 AM EDTSpecial Weather StatementLOTKendall24 min
Aug 26, 11:25 AM EDTSevere Thunderstorm WarningLOTGrundy, Kendall, Will50 min
Aug 26, 11:28 AM EDTSevere Thunderstorm WarningLOTGrundy, Kendall, Will47 min
Aug 26, 11:46 AM EDTSpecial Weather StatementLOTDuPage29 min
Aug 26, 11:50 AM EDTSpecial Weather StatementLOTLake25 min
Aug 26, 11:58 AM EDTSpecial Marine WarningLOT92 min
Aug 26, 11:59 AM EDTSpecial Weather StatementLOTGrundy31 min
Aug 26, 12:06 PM EDTSpecial Weather StatementLOTCook24 min
Aug 26, 12:17 PM EDTSpecial Weather StatementLOTKankakee, Will58 min
Aug 26, 1:30 PM EDTSevere Thunderstorm WarningLOTIroquois60 min
Aug 26, 1:01 PM EDTSpecial Weather StatementLOTPorter44 min
Aug 26, 1:22 PM EDTSpecial Weather StatementLOTJasper, Newton53 min
Aug 26, 1:47 PM EDTSevere Thunderstorm WarningLOTBenton, Jasper, Newton58 min
Aug 26, 2:11 PM EDTAreal Flood AdvisoryLOTBenton, Jasper3 hr

Nearby

Severe Thunderstorm Warnings in Indiana, 2014Every severe thunderstorm 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.